/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-SemanticLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 22:19:58,806 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 22:19:58,809 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 22:19:58,845 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-24 22:19:58,865 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-24 22:19:58,867 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-24 22:19:58,868 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-24 22:19:58,869 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-24 22:19:58,871 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-24 22:19:58,872 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-24 22:19:58,874 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-24 22:19:58,882 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-24 22:19:58,883 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-24 22:19:58,884 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-24 22:19:58,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-24 22:19:58,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-24 22:19:58,893 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-24 22:19:58,900 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 22:19:58,901 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 22:19:58,901 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 22:19:58,902 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-SemanticLbe.epf [2021-03-24 22:19:58,937 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 22:19:58,937 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 22:19:58,940 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 22:19:58,940 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 22:19:58,941 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 22:19:58,941 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 22:19:58,941 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 22:19:58,941 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 22:19:58,941 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 22:19:58,941 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 22:19:58,942 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 22:19:58,942 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 22:19:58,942 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 22:19:58,943 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 22:19:58,943 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 22:19:58,943 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 22:19:58,943 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 22:19:58,943 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 22:19:58,943 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 22:19:58,943 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 22:19:58,944 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 22:19:58,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 22:19:58,944 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 22:19:58,944 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 22:19:58,944 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 22:19:58,944 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 22:19:58,944 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 22:19:58,945 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 22:19:58,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 22:19:59,236 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 22:19:59,255 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 22:19:59,257 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 22:19:59,258 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 22:19:59,259 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 22:19:59,259 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl [2021-03-24 22:19:59,260 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl' [2021-03-24 22:19:59,290 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 22:19:59,292 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 22:19:59,293 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 22:19:59,294 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 22:19:59,294 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 22:19:59,304 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,313 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,319 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 22:19:59,320 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 22:19:59,323 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 22:19:59,323 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 22:19:59,330 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,330 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,331 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,331 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,333 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,333 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,334 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/1) ... [2021-03-24 22:19:59,335 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 22:19:59,336 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 22:19:59,336 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 22:19:59,336 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 22:19:59,338 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (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 [2021-03-24 22:19:59,403 INFO L124 BoogieDeclarations]: Specification and implementation of procedure bar given in one single declaration [2021-03-24 22:19:59,403 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-03-24 22:19:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-03-24 22:19:59,404 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-24 22:19:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-24 22:19:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-24 22:19:59,404 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 22:19:59,404 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 22:19:59,404 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 22:19:59,405 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 22:19:59,517 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 22:19:59,517 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-24 22:19:59,518 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:19:59 BoogieIcfgContainer [2021-03-24 22:19:59,518 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 22:19:59,519 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 22:19:59,520 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 22:19:59,522 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 22:19:59,522 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 10:19:59" (1/2) ... [2021-03-24 22:19:59,523 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5dd41b63 and model type JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 10:19:59, skipping insertion in model container [2021-03-24 22:19:59,523 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 10:19:59" (2/2) ... [2021-03-24 22:19:59,524 INFO L111 eAbstractionObserver]: Analyzing ICFG JoinTheForkingThread.bpl [2021-03-24 22:19:59,528 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 22:19:59,531 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-24 22:19:59,532 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 22:19:59,559 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,559 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,560 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,561 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,562 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_localVar not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,563 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_nondet not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,563 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,566 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,569 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_localVar not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,569 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_nondet not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,569 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-24 22:19:59,584 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-03-24 22:19:59,599 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-24 22:19:59,616 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 22:19:59,616 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 22:19:59,616 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 22:19:59,616 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 22:19:59,617 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 22:19:59,617 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 22:19:59,617 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 22:19:59,617 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 22:19:59,625 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 78 flow [2021-03-24 22:19:59,642 INFO L129 PetriNetUnfolder]: 1/21 cut-off events. [2021-03-24 22:19:59,642 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 22:19:59,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 32 conditions, 21 events. 1/21 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 11 event pairs, 0 based on Foata normal form. 0/17 useless extension candidates. Maximal degree in co-relation 10. Up to 3 conditions per place. [2021-03-24 22:19:59,645 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 78 flow [2021-03-24 22:19:59,647 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 50 flow [2021-03-24 22:19:59,648 INFO L165 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-03-24 22:19:59,658 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 21 places, 16 transitions, 50 flow [2021-03-24 22:19:59,661 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 21 places, 16 transitions, 50 flow [2021-03-24 22:19:59,662 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 21 places, 16 transitions, 50 flow [2021-03-24 22:19:59,669 INFO L129 PetriNetUnfolder]: 1/17 cut-off events. [2021-03-24 22:19:59,669 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-24 22:19:59,669 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 17 events. 1/17 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 7 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 8. Up to 3 conditions per place. [2021-03-24 22:19:59,671 INFO L142 LiptonReduction]: Number of co-enabled transitions 10 [2021-03-24 22:19:59,804 INFO L154 LiptonReduction]: Checked pairs total: 2 [2021-03-24 22:19:59,805 INFO L156 LiptonReduction]: Total number of compositions: 4 [2021-03-24 22:19:59,807 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 159 [2021-03-24 22:19:59,815 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-03-24 22:19:59,815 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-24 22:19:59,815 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:19:59,816 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2021-03-24 22:19:59,816 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:19:59,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:19:59,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1762167513, now seen corresponding path program 1 times [2021-03-24 22:19:59,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:19:59,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562395359] [2021-03-24 22:19:59,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:19:59,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 22:19:59,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:59,957 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:19:59,962 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:59,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-24 22:19:59,978 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 22:19:59,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 22:19:59,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 22:19:59,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562395359] [2021-03-24 22:19:59,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 22:19:59,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 22:19:59,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [984169494] [2021-03-24 22:19:59,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 22:19:59,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 22:20:00,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 22:20:00,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 22:20:00,009 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 25 out of 32 [2021-03-24 22:20:00,011 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 17 places, 12 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-03-24 22:20:00,012 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 22:20:00,012 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 25 of 32 [2021-03-24 22:20:00,013 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 22:20:00,040 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-03-24 22:20:00,040 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-24 22:20:00,040 INFO L84 FinitePrefix]: Finished finitePrefix Result has 18 conditions, 7 events. 0/7 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 1 event pairs, 0 based on Foata normal form. 2/9 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-24 22:20:00,042 INFO L132 encePairwiseOnDemand]: 29/32 looper letters, 1 selfloop transitions, 1 changer transitions 0/7 dead transitions. [2021-03-24 22:20:00,042 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 16 places, 7 transitions, 27 flow [2021-03-24 22:20:00,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 22:20:00,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 22:20:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2021-03-24 22:20:00,055 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8229166666666666 [2021-03-24 22:20:00,055 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 79 transitions. [2021-03-24 22:20:00,056 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 79 transitions. [2021-03-24 22:20:00,057 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 22:20:00,058 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 79 transitions. [2021-03-24 22:20:00,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 26.333333333333332) internal successors, (79), 3 states have internal predecessors, (79), 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) [2021-03-24 22:20:00,065 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-03-24 22:20:00,066 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 32.0) internal successors, (128), 4 states have internal predecessors, (128), 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) [2021-03-24 22:20:00,067 INFO L185 Difference]: Start difference. First operand has 17 places, 12 transitions, 42 flow. Second operand 3 states and 79 transitions. [2021-03-24 22:20:00,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 16 places, 7 transitions, 27 flow [2021-03-24 22:20:00,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 13 places, 7 transitions, 22 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-24 22:20:00,071 INFO L241 Difference]: Finished difference. Result has 13 places, 7 transitions, 20 flow [2021-03-24 22:20:00,072 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=32, PETRI_DIFFERENCE_MINUEND_FLOW=18, PETRI_DIFFERENCE_MINUEND_PLACES=11, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=7, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=6, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=20, PETRI_PLACES=13, PETRI_TRANSITIONS=7} [2021-03-24 22:20:00,073 INFO L343 CegarLoopForPetriNet]: 17 programPoint places, -4 predicate places. [2021-03-24 22:20:00,073 INFO L480 AbstractCegarLoop]: Abstraction has has 13 places, 7 transitions, 20 flow [2021-03-24 22:20:00,073 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 25.666666666666668) internal successors, (77), 3 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) [2021-03-24 22:20:00,074 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 22:20:00,074 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-03-24 22:20:00,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 22:20:00,074 INFO L428 AbstractCegarLoop]: === Iteration 2 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 22:20:00,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 22:20:00,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1206585279, now seen corresponding path program 1 times [2021-03-24 22:20:00,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 22:20:00,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199207603] [2021-03-24 22:20:00,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 22:20:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:00,094 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:00,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 22:20:00,108 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 22:20:00,130 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 22:20:00,130 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 22:20:00,131 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 22:20:00,146 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 10:20:00 BasicIcfg [2021-03-24 22:20:00,147 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 22:20:00,149 INFO L168 Benchmark]: Toolchain (without parser) took 855.28 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 206.9 MB in the end (delta: 29.6 MB). Peak memory consumption was 30.8 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:00,149 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:20:00,150 INFO L168 Benchmark]: Boogie Procedure Inliner took 25.45 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:20:00,151 INFO L168 Benchmark]: Boogie Preprocessor took 14.75 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 822.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 22:20:00,152 INFO L168 Benchmark]: RCFGBuilder took 182.46 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 225.4 MB in the end (delta: 8.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:00,152 INFO L168 Benchmark]: TraceAbstraction took 627.25 ms. Allocated memory is still 255.9 MB. Free memory was 224.9 MB in the beginning and 207.4 MB in the end (delta: 17.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. [2021-03-24 22:20:00,158 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 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 25.45 ms. Allocated memory is still 255.9 MB. Free memory was 236.5 MB in the beginning and 235.0 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.75 ms. Allocated memory is still 255.9 MB. Free memory was 235.0 MB in the beginning and 234.2 MB in the end (delta: 822.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 182.46 ms. Allocated memory is still 255.9 MB. Free memory was 234.1 MB in the beginning and 225.4 MB in the end (delta: 8.7 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 627.25 ms. Allocated memory is still 255.9 MB. Free memory was 224.9 MB in the beginning and 207.4 MB in the end (delta: 17.6 MB). Peak memory consumption was 18.2 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 143.9ms, 21 PlacesBefore, 17 PlacesAfterwards, 16 TransitionsBefore, 12 TransitionsAfterwards, 10 CoEnabledTransitionPairs, 3 FixpointIterations, 2 TrivialSequentialCompositions, 2 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 4 TotalNumberOfCompositions, 2 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 2, positive: 2, positive conditional: 0, positive unconditional: 2, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 2, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 2, unknown conditional: 0, unknown unconditional: 2] , Statistics on independence cache: Total cache size (in pairs): 0, Positive cache size: 0, Positive conditional cache size: 0, Positive unconditional cache size: 0, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - CounterExampleResult [Line: 45]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 x := 0; [L18] 0 g := 0; VAL [g=0, x=0] [L20] FORK 0 fork 1 foo(x); VAL [g=0, n=0, x=0] [L29] FORK 1 fork 2 bar(n); VAL [g=0, n=0, n=0, x=0] [L40] 2 res := 23; VAL [g=0, n=0, n=0, res=23, x=0] [L30] 1 g := g + 1; [L31] 1 res := 23; [L44] JOIN 1 join nondet assign localVar; VAL [g=1, localVar=23, n=0, n=0, nondet=1, res=23, res=23, x=0] [L45] 2 assert false; VAL [g=1, localVar=23, n=0, n=0, nondet=1, res=23, res=23, x=0] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 19 locations, 2 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 3.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 519.6ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 71.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 194.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 1 SDtfs, 1 SDslu, 0 SDs, 0 SdLazy, 1 SolverSat, 0 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 14.0ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=42occurred in iteration=0, InterpolantAutomatonStates: 3, 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: 9.1ms SsaConstructionTime, 27.8ms SatisfiabilityAnalysisTime, 59.3ms InterpolantComputationTime, 13 NumberOfCodeBlocks, 13 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 5 ConstructedInterpolants, 0 QuantifiedInterpolants, 11 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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...