Program: 157624
Project: 157624
Buggy source:
public void playDaxosAndVampire(boolean castVampireDifferentWay){
  addCard(Zone.HAND,playerA,daxosCard,1);
  addCard(Zone.BATTLEFIELD,playerA,"String_Node_Str",4);
  addCard(Zone.HAND,playerA,"String_Node_Str",1);
  addCard(Zone.BATTLEFIELD,playerA,"String_Node_Str",8);
  addCard(Zone.HAND,playerA,"String_Node_Str",1);
  addCard(Zone.BATTLEFIELD,playerA,"String_Node_Str",2);
  castSpell(1,PhaseStep.PRECOMBAT_MAIN,playerA,daxosCard);
  checkPermanentCount("String_Node_Str",1,PhaseStep.POSTCOMBAT_MAIN,playerA,daxosCard,1);
  if (castVampireDifferentWay) {
    castSpell(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    castSpell(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
  }
 else {
    activateManaAbility(1,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(1,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(1,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(1,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(1,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(1,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    castSpell(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    castSpell(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
  }
  checkPT("String_Node_Str",3,PhaseStep.BEGIN_COMBAT,playerA,daxosCard,5,5);
  checkAbility("String_Node_Str",3,PhaseStep.BEGIN_COMBAT,playerA,daxosCard,FlyingAbility.class,true);
  checkSubType("String_Node_Str",3,PhaseStep.BEGIN_COMBAT,playerA,daxosCard,SubType.VAMPIRE,true);
  setStopAt(3,PhaseStep.END_TURN);
  execute();
}

Fixed version (ground truth):
public void playDaxosAndVampire(boolean castVampireDifferentWay){
  addCard(Zone.HAND,playerA,daxosCard,1);
  addCard(Zone.BATTLEFIELD,playerA,"String_Node_Str",4);
  addCard(Zone.HAND,playerA,"String_Node_Str",1);
  addCard(Zone.BATTLEFIELD,playerA,"String_Node_Str",8);
  addCard(Zone.HAND,playerA,"String_Node_Str",1);
  addCard(Zone.BATTLEFIELD,playerA,"String_Node_Str",2);
  castSpell(1,PhaseStep.PRECOMBAT_MAIN,playerA,daxosCard);
  checkPermanentCount("String_Node_Str",1,PhaseStep.POSTCOMBAT_MAIN,playerA,daxosCard,1);
  if (castVampireDifferentWay) {
    castSpell(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    castSpell(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
  }
 else {
    activateManaAbility(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    activateManaAbility(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    castSpell(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
    castSpell(3,PhaseStep.PRECOMBAT_MAIN,playerA,"String_Node_Str");
  }
  checkPT("String_Node_Str",3,PhaseStep.BEGIN_COMBAT,playerA,daxosCard,5,5);
  checkAbility("String_Node_Str",3,PhaseStep.BEGIN_COMBAT,playerA,daxosCard,FlyingAbility.class,true);
  checkSubType("String_Node_Str",3,PhaseStep.BEGIN_COMBAT,playerA,daxosCard,SubType.VAMPIRE,true);
  setStopAt(3,PhaseStep.END_TURN);
  execute();
}