/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 04:36:48,057 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 04:36:48,058 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 04:36:48,076 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 04:36:48,111 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-03-11 04:36:48,125 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 04:36:48,125 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 04:36:48,126 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 04:36:48,126 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 04:36:48,126 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 04:36:48,127 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 04:36:48,127 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 04:36:48,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 04:36:48,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 04:36:48,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 04:36:48,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 04:36:48,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 04:36:48,127 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 04:36:48,127 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 04:36:48,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 04:36:48,128 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 04:36:48,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 04:36:48,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 04:36:48,128 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 04:36:48,128 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 04:36:48,128 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 04:36:48,128 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:36:48,128 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 04:36:48,128 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 04:36:48,129 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 04:36:48,129 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 04:36:48,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 04:36:48,129 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 04:36:48,129 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 04:36:48,129 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 04:36:48,312 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 04:36:48,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 04:36:48,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 04:36:48,329 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 04:36:48,329 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 04:36:48,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl [2021-03-11 04:36:48,333 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl' [2021-03-11 04:36:48,366 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 04:36:48,369 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 04:36:48,370 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 04:36:48,370 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 04:36:48,370 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 04:36:48,378 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,383 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,389 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 04:36:48,391 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 04:36:48,391 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 04:36:48,391 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 04:36:48,396 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,396 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,397 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,400 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,402 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,402 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... [2021-03-11 04:36:48,403 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 04:36:48,404 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 04:36:48,404 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 04:36:48,404 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 04:36:48,407 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:36:48,454 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-03-11 04:36:48,454 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-03-11 04:36:48,456 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-03-11 04:36:48,456 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-03-11 04:36:48,456 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-03-11 04:36:48,456 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-03-11 04:36:48,456 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 04:36:48,456 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 04:36:48,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 04:36:48,457 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 04:36:48,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 04:36:48,550 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-03-11 04:36:48,551 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:36:48 BoogieIcfgContainer [2021-03-11 04:36:48,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 04:36:48,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 04:36:48,553 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 04:36:48,554 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 04:36:48,554 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:36:48" (1/2) ... [2021-03-11 04:36:48,555 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@15a99e55 and model type PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:36:48, skipping insertion in model container [2021-03-11 04:36:48,555 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:36:48" (2/2) ... [2021-03-11 04:36:48,556 INFO L111 eAbstractionObserver]: Analyzing ICFG PetersonWithBug.bpl [2021-03-11 04:36:48,559 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 04:36:48,561 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-11 04:36:48,562 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 04:36:48,577 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:48,577 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:48,580 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:48,580 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:36:48,581 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-03-11 04:36:48,592 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-11 04:36:48,605 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:36:48,605 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:36:48,605 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:36:48,605 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:36:48,605 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:36:48,605 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:36:48,605 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:36:48,605 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:36:48,616 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-03-11 04:36:48,639 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-03-11 04:36:48,639 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:36:48,642 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 24 events. 2/24 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 40 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 24. Up to 2 conditions per place. [2021-03-11 04:36:48,643 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-03-11 04:36:48,646 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-03-11 04:36:48,651 INFO L129 PetriNetUnfolder]: 0/14 cut-off events. [2021-03-11 04:36:48,651 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:36:48,652 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:48,652 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-11 04:36:48,652 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 04:36:48,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:48,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1990965056, now seen corresponding path program 1 times [2021-03-11 04:36:48,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:48,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906319839] [2021-03-11 04:36:48,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:48,740 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:48,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:36:48,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:36:48,756 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906319839] [2021-03-11 04:36:48,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:48,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-11 04:36:48,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740900347] [2021-03-11 04:36:48,762 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 04:36:48,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:48,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 04:36:48,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 04:36:48,774 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 26 [2021-03-11 04:36:48,776 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 24 transitions, 54 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:48,776 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:48,776 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 26 [2021-03-11 04:36:48,777 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:48,839 INFO L129 PetriNetUnfolder]: 22/81 cut-off events. [2021-03-11 04:36:48,839 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-11 04:36:48,839 INFO L84 FinitePrefix]: Finished finitePrefix Result has 134 conditions, 81 events. 22/81 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 232 event pairs, 4 based on Foata normal form. 15/92 useless extension candidates. Maximal degree in co-relation 125. Up to 30 conditions per place. [2021-03-11 04:36:48,841 INFO L132 encePairwiseOnDemand]: 15/26 looper letters, 8 selfloop transitions, 7 changer transitions 0/26 dead transitions. [2021-03-11 04:36:48,841 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 27 places, 26 transitions, 88 flow [2021-03-11 04:36:48,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 04:36:48,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 04:36:48,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2021-03-11 04:36:48,865 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8461538461538461 [2021-03-11 04:36:48,865 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 66 transitions. [2021-03-11 04:36:48,865 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 66 transitions. [2021-03-11 04:36:48,866 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:48,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 66 transitions. [2021-03-11 04:36:48,884 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:48,887 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:48,887 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 26.0) internal successors, (104), 4 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:48,888 INFO L185 Difference]: Start difference. First operand has 29 places, 24 transitions, 54 flow. Second operand 3 states and 66 transitions. [2021-03-11 04:36:48,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 27 places, 26 transitions, 88 flow [2021-03-11 04:36:48,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 26 transitions, 86 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 04:36:48,892 INFO L241 Difference]: Finished difference. Result has 27 places, 26 transitions, 100 flow [2021-03-11 04:36:48,893 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=44, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=20, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=27, PETRI_TRANSITIONS=26} [2021-03-11 04:36:48,894 INFO L335 CegarLoopForPetriNet]: 29 programPoint places, -2 predicate places. [2021-03-11 04:36:48,894 INFO L480 AbstractCegarLoop]: Abstraction has has 27 places, 26 transitions, 100 flow [2021-03-11 04:36:48,894 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:48,894 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:48,894 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:36:48,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 04:36:48,895 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 04:36:48,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:48,895 INFO L82 PathProgramCache]: Analyzing trace with hash -1226902786, now seen corresponding path program 1 times [2021-03-11 04:36:48,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:48,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395892730] [2021-03-11 04:36:48,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:48,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:48,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:48,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:48,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:36:48,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:48,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:48,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:48,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:48,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:36:48,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395892730] [2021-03-11 04:36:48,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:48,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 04:36:48,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458130638] [2021-03-11 04:36:48,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:36:48,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:48,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:36:48,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:36:48,958 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 26 [2021-03-11 04:36:48,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 26 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:48,959 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:48,959 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 26 [2021-03-11 04:36:48,959 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:49,007 INFO L129 PetriNetUnfolder]: 29/105 cut-off events. [2021-03-11 04:36:49,007 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-11 04:36:49,008 INFO L84 FinitePrefix]: Finished finitePrefix Result has 232 conditions, 105 events. 29/105 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 338 event pairs, 5 based on Foata normal form. 5/107 useless extension candidates. Maximal degree in co-relation 222. Up to 32 conditions per place. [2021-03-11 04:36:49,009 INFO L132 encePairwiseOnDemand]: 21/26 looper letters, 6 selfloop transitions, 5 changer transitions 0/31 dead transitions. [2021-03-11 04:36:49,009 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 31 transitions, 132 flow [2021-03-11 04:36:49,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 04:36:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 04:36:49,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2021-03-11 04:36:49,015 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8076923076923077 [2021-03-11 04:36:49,015 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 84 transitions. [2021-03-11 04:36:49,016 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 84 transitions. [2021-03-11 04:36:49,016 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:49,016 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 84 transitions. [2021-03-11 04:36:49,019 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.0) internal successors, (84), 4 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,021 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,021 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,021 INFO L185 Difference]: Start difference. First operand has 27 places, 26 transitions, 100 flow. Second operand 4 states and 84 transitions. [2021-03-11 04:36:49,021 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 31 transitions, 132 flow [2021-03-11 04:36:49,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 31 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-11 04:36:49,027 INFO L241 Difference]: Finished difference. Result has 30 places, 29 transitions, 115 flow [2021-03-11 04:36:49,027 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=30, PETRI_TRANSITIONS=29} [2021-03-11 04:36:49,027 INFO L335 CegarLoopForPetriNet]: 29 programPoint places, 1 predicate places. [2021-03-11 04:36:49,028 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 29 transitions, 115 flow [2021-03-11 04:36:49,028 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,030 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:49,031 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:36:49,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 04:36:49,032 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 04:36:49,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:49,034 INFO L82 PathProgramCache]: Analyzing trace with hash -791483276, now seen corresponding path program 2 times [2021-03-11 04:36:49,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:49,035 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118197163] [2021-03-11 04:36:49,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:36:49,057 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:49,058 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:49,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:49,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:36:49,067 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:49,068 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 04:36:49,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:36:49,076 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:36:49,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 04:36:49,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118197163] [2021-03-11 04:36:49,078 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:36:49,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 04:36:49,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769721102] [2021-03-11 04:36:49,078 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-03-11 04:36:49,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:36:49,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-03-11 04:36:49,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-03-11 04:36:49,081 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 26 [2021-03-11 04:36:49,082 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 29 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,082 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:36:49,082 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 26 [2021-03-11 04:36:49,082 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:36:49,119 INFO L129 PetriNetUnfolder]: 26/105 cut-off events. [2021-03-11 04:36:49,119 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-03-11 04:36:49,120 INFO L84 FinitePrefix]: Finished finitePrefix Result has 251 conditions, 105 events. 26/105 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 360 event pairs, 5 based on Foata normal form. 6/107 useless extension candidates. Maximal degree in co-relation 240. Up to 31 conditions per place. [2021-03-11 04:36:49,120 INFO L132 encePairwiseOnDemand]: 22/26 looper letters, 8 selfloop transitions, 5 changer transitions 0/34 dead transitions. [2021-03-11 04:36:49,120 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 34 transitions, 159 flow [2021-03-11 04:36:49,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-11 04:36:49,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-03-11 04:36:49,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2021-03-11 04:36:49,127 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7980769230769231 [2021-03-11 04:36:49,127 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 83 transitions. [2021-03-11 04:36:49,127 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 83 transitions. [2021-03-11 04:36:49,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:36:49,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 83 transitions. [2021-03-11 04:36:49,128 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,129 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 26.0) internal successors, (130), 5 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,129 INFO L185 Difference]: Start difference. First operand has 30 places, 29 transitions, 115 flow. Second operand 4 states and 83 transitions. [2021-03-11 04:36:49,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 34 transitions, 159 flow [2021-03-11 04:36:49,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 34 transitions, 156 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 04:36:49,133 INFO L241 Difference]: Finished difference. Result has 34 places, 32 transitions, 147 flow [2021-03-11 04:36:49,134 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=26, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=147, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2021-03-11 04:36:49,134 INFO L335 CegarLoopForPetriNet]: 29 programPoint places, 5 predicate places. [2021-03-11 04:36:49,134 INFO L480 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 147 flow [2021-03-11 04:36:49,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 04:36:49,134 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:36:49,134 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:36:49,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 04:36:49,134 INFO L428 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-03-11 04:36:49,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:36:49,136 INFO L82 PathProgramCache]: Analyzing trace with hash 705983668, now seen corresponding path program 3 times [2021-03-11 04:36:49,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:36:49,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477064576] [2021-03-11 04:36:49,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:36:49,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:36:49,151 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:36:49,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:36:49,154 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:36:49,164 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:36:49,164 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:36:49,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 04:36:49,174 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 04:36:49 BasicIcfg [2021-03-11 04:36:49,175 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 04:36:49,175 INFO L168 Benchmark]: Toolchain (without parser) took 808.49 ms. Allocated memory is still 255.9 MB. Free memory was 237.3 MB in the beginning and 192.9 MB in the end (delta: 44.4 MB). Peak memory consumption was 44.8 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:49,176 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 255.9 MB. Free memory is still 238.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:36:49,176 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.61 ms. Allocated memory is still 255.9 MB. Free memory was 236.9 MB in the beginning and 235.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:49,176 INFO L168 Benchmark]: Boogie Preprocessor took 12.32 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.5 MB in the end (delta: 809.1 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:36:49,177 INFO L168 Benchmark]: RCFGBuilder took 147.90 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 241.7 MB in the end (delta: -7.3 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:49,177 INFO L168 Benchmark]: TraceAbstraction took 622.26 ms. Allocated memory is still 255.9 MB. Free memory was 241.0 MB in the beginning and 192.9 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.0 GB. [2021-03-11 04:36:49,178 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 255.9 MB. Free memory is still 238.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.61 ms. Allocated memory is still 255.9 MB. Free memory was 236.9 MB in the beginning and 235.3 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.32 ms. Allocated memory is still 255.9 MB. Free memory was 235.3 MB in the beginning and 234.5 MB in the end (delta: 809.1 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 147.90 ms. Allocated memory is still 255.9 MB. Free memory was 234.3 MB in the beginning and 241.7 MB in the end (delta: -7.3 MB). Peak memory consumption was 21.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 622.26 ms. Allocated memory is still 255.9 MB. Free memory was 241.0 MB in the beginning and 192.9 MB in the end (delta: 48.1 MB). Peak memory consumption was 48.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 59]: assertion can be violated assertion can be violated We found a FailurePath: [L25] 0 critical := 0; VAL [critical=0] [L26] FORK 0 fork 0 Process0(); VAL [critical=0] [L37] 1 turn := 1; VAL [critical=0, turn=1] [L27] FORK 0 fork 1 Process1(); VAL [critical=0, turn=1] [L56] 2 flag1 := 1; VAL [critical=0, flag1=1, turn=1] [L57] 2 turn := 0; VAL [critical=0, flag1=1, turn=0] [L58] 2 assume flag0 == 0 || turn == 1; VAL [critical=0, flag0=0, flag1=1, turn=0] [L38] 1 flag0 := 1; VAL [critical=0, flag0=1, flag1=1, turn=0] [L39] 1 assume flag1 == 0 || turn == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L40] 1 assert critical == 0; VAL [critical=0, flag0=1, flag1=1, turn=0] [L41] 1 critical := 1; VAL [critical=1, flag0=1, flag1=1, turn=0] [L59] 2 assert critical == 0; VAL [critical=1, flag0=1, flag1=1, turn=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 5.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 562.8ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 250.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 40.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 8 SDslu, 3 SDs, 0 SdLazy, 24 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 52.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=147occurred in iteration=3, InterpolantAutomatonStates: 11, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 6.4ms SsaConstructionTime, 25.7ms SatisfiabilityAnalysisTime, 130.3ms InterpolantComputationTime, 42 NumberOfCodeBlocks, 42 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 27 ConstructedInterpolants, 0 QuantifiedInterpolants, 69 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 3 InterpolantComputations, 3 PerfectInterpolantSequences, 0/0 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...