/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/JoinTheForkingThread.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 04:35:50,311 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 04:35:50,313 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 04:35:50,351 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-03-11 04:35:50,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-03-11 04:35:50,354 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-03-11 04:35:50,356 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-03-11 04:35:50,361 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-03-11 04:35:50,364 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-03-11 04:35:50,367 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-03-11 04:35:50,368 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-03-11 04:35:50,369 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-03-11 04:35:50,370 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 04:35:50,372 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 04:35:50,373 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 04:35:50,374 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 04:35:50,376 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 04:35:50,377 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 04:35:50,379 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 04:35:50,386 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 04:35:50,387 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 04:35:50,388 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 04:35:50,389 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 04:35:50,391 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 04:35:50,396 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 04:35:50,399 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-03-11 04:35:50,400 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-03-11 04:35:50,401 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-03-11 04:35:50,402 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-03-11 04:35:50,402 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-03-11 04:35:50,403 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-03-11 04:35:50,403 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-03-11 04:35:50,403 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-03-11 04:35:50,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 04:35:50,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 04:35:50,404 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 04:35:50,405 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 04:35:50,441 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 04:35:50,441 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 04:35:50,443 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 04:35:50,443 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 04:35:50,443 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 04:35:50,443 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 04:35:50,444 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 04:35:50,444 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 04:35:50,444 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 04:35:50,444 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 04:35:50,444 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 04:35:50,444 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 04:35:50,444 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 04:35:50,445 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 04:35:50,445 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 04:35:50,445 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 04:35:50,445 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 04:35:50,445 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 04:35:50,445 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 04:35:50,445 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 04:35:50,446 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 04:35:50,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 04:35:50,446 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 04:35:50,446 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 04:35:50,446 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 04:35:50,446 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 04:35:50,446 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 04:35:50,447 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 04:35:50,447 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 04:35:50,447 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 04:35:50,736 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 04:35:50,761 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 04:35:50,763 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 04:35:50,764 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 04:35:50,765 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 04:35:50,765 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl [2021-03-11 04:35:50,766 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/JoinTheForkingThread.bpl' [2021-03-11 04:35:50,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 04:35:50,796 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 04:35:50,797 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 04:35:50,797 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 04:35:50,797 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 04:35:50,808 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,813 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,820 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 04:35:50,822 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 04:35:50,822 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 04:35:50,823 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 04:35:50,829 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,830 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,831 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,831 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,833 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,833 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,834 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/1) ... [2021-03-11 04:35:50,834 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 04:35:50,835 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 04:35:50,835 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 04:35:50,835 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 04:35:50,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (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 04:35:50,895 INFO L124 BoogieDeclarations]: Specification and implementation of procedure bar given in one single declaration [2021-03-11 04:35:50,895 INFO L130 BoogieDeclarations]: Found specification of procedure bar [2021-03-11 04:35:50,897 INFO L138 BoogieDeclarations]: Found implementation of procedure bar [2021-03-11 04:35:50,897 INFO L124 BoogieDeclarations]: Specification and implementation of procedure foo given in one single declaration [2021-03-11 04:35:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure foo [2021-03-11 04:35:50,897 INFO L138 BoogieDeclarations]: Found implementation of procedure foo [2021-03-11 04:35:50,897 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 04:35:50,897 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 04:35:50,897 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 04:35:50,898 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 04:35:51,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 04:35:51,022 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 04:35:51,023 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:35:51 BoogieIcfgContainer [2021-03-11 04:35:51,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 04:35:51,024 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 04:35:51,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 04:35:51,027 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 04:35:51,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 04:35:50" (1/2) ... [2021-03-11 04:35:51,028 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bedd83 and model type JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 04:35:51, skipping insertion in model container [2021-03-11 04:35:51,028 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 04:35:51" (2/2) ... [2021-03-11 04:35:51,029 INFO L111 eAbstractionObserver]: Analyzing ICFG JoinTheForkingThread.bpl [2021-03-11 04:35:51,033 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 04:35:51,036 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-03-11 04:35:51,036 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 04:35:51,053 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,053 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,054 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,054 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,056 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_localVar not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,057 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_nondet not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,057 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,060 WARN L313 ript$VariableManager]: TermVariabe fooThread1of1ForFork1_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,062 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_localVar not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,062 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_nondet not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,063 WARN L313 ript$VariableManager]: TermVariabe barThread1of1ForFork0_res not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-03-11 04:35:51,076 INFO L149 ThreadInstanceAdder]: Constructed 9 joinOtherThreadTransitions. [2021-03-11 04:35:51,092 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-03-11 04:35:51,109 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 04:35:51,109 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 04:35:51,109 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 04:35:51,109 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 04:35:51,109 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 04:35:51,109 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 04:35:51,109 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 04:35:51,109 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 04:35:51,124 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 25 transitions, 78 flow [2021-03-11 04:35:51,159 INFO L129 PetriNetUnfolder]: 1/21 cut-off events. [2021-03-11 04:35:51,159 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 04:35:51,161 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. [2021-03-11 04:35:51,161 INFO L82 GeneralOperation]: Start removeDead. Operand has 29 places, 25 transitions, 78 flow [2021-03-11 04:35:51,164 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 21 places, 16 transitions, 50 flow [2021-03-11 04:35:51,171 INFO L129 PetriNetUnfolder]: 0/9 cut-off events. [2021-03-11 04:35:51,171 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-03-11 04:35:51,171 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:35:51,172 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:35:51,172 INFO L428 AbstractCegarLoop]: === Iteration 1 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:35:51,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:35:51,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1250792783, now seen corresponding path program 1 times [2021-03-11 04:35:51,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:35:51,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142124957] [2021-03-11 04:35:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:35:51,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 04:35:51,295 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:35:51,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:35:51,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:35:51,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 04:35:51,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 04:35:51,310 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 04:35:51,311 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 04:35:51,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142124957] [2021-03-11 04:35:51,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 04:35:51,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-11 04:35:51,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755136033] [2021-03-11 04:35:51,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-11 04:35:51,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 04:35:51,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-11 04:35:51,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-11 04:35:51,332 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 28 [2021-03-11 04:35:51,334 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 21 places, 16 transitions, 50 flow. Second operand has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 04:35:51,335 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 04:35:51,335 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 28 [2021-03-11 04:35:51,336 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 04:35:51,351 INFO L129 PetriNetUnfolder]: 0/10 cut-off events. [2021-03-11 04:35:51,351 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-03-11 04:35:51,351 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21 conditions, 10 events. 0/10 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. 2/12 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 04:35:51,352 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 1 selfloop transitions, 1 changer transitions 0/10 dead transitions. [2021-03-11 04:35:51,352 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 19 places, 10 transitions, 33 flow [2021-03-11 04:35:51,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-11 04:35:51,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-11 04:35:51,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2021-03-11 04:35:51,361 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-03-11 04:35:51,361 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 70 transitions. [2021-03-11 04:35:51,361 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 70 transitions. [2021-03-11 04:35:51,362 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 04:35:51,364 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 70 transitions. [2021-03-11 04:35:51,365 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 23.333333333333332) internal successors, (70), 3 states have internal predecessors, (70), 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 04:35:51,368 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 04:35:51,369 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 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 04:35:51,370 INFO L185 Difference]: Start difference. First operand has 21 places, 16 transitions, 50 flow. Second operand 3 states and 70 transitions. [2021-03-11 04:35:51,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 19 places, 10 transitions, 33 flow [2021-03-11 04:35:51,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 16 places, 10 transitions, 28 flow, removed 0 selfloop flow, removed 3 redundant places. [2021-03-11 04:35:51,374 INFO L241 Difference]: Finished difference. Result has 16 places, 10 transitions, 26 flow [2021-03-11 04:35:51,375 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=24, PETRI_DIFFERENCE_MINUEND_PLACES=14, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=10, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=26, PETRI_PLACES=16, PETRI_TRANSITIONS=10} [2021-03-11 04:35:51,376 INFO L335 CegarLoopForPetriNet]: 21 programPoint places, -5 predicate places. [2021-03-11 04:35:51,376 INFO L480 AbstractCegarLoop]: Abstraction has has 16 places, 10 transitions, 26 flow [2021-03-11 04:35:51,376 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 22.666666666666668) internal successors, (68), 3 states have internal predecessors, (68), 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 04:35:51,376 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 04:35:51,376 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-11 04:35:51,377 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 04:35:51,377 INFO L428 AbstractCegarLoop]: === Iteration 2 === [fooThread1of1ForFork1Err0INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, fooErr1INUSE_VIOLATION, barErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 04:35:51,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 04:35:51,378 INFO L82 PathProgramCache]: Analyzing trace with hash -292609395, now seen corresponding path program 1 times [2021-03-11 04:35:51,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 04:35:51,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8679097] [2021-03-11 04:35:51,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 04:35:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:35:51,388 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:35:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-11 04:35:51,393 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-11 04:35:51,405 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-11 04:35:51,405 INFO L620 BasicCegarLoop]: Counterexample might be feasible [2021-03-11 04:35:51,406 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 04:35:51,418 INFO L202 PluginConnector]: Adding new model JoinTheForkingThread.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 04:35:51 BasicIcfg [2021-03-11 04:35:51,418 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 04:35:51,419 INFO L168 Benchmark]: Toolchain (without parser) took 625.49 ms. Allocated memory is still 255.9 MB. Free memory was 236.4 MB in the beginning and 214.5 MB in the end (delta: 21.8 MB). Peak memory consumption was 24.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:35:51,420 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 04:35:51,420 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.12 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:35:51,421 INFO L168 Benchmark]: Boogie Preprocessor took 12.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.5 MB in the end (delta: 879.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 04:35:51,422 INFO L168 Benchmark]: RCFGBuilder took 188.12 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 241.0 MB in the end (delta: -7.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. [2021-03-11 04:35:51,422 INFO L168 Benchmark]: TraceAbstraction took 393.76 ms. Allocated memory is still 255.9 MB. Free memory was 240.5 MB in the beginning and 214.5 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. [2021-03-11 04:35:51,424 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 237.4 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.12 ms. Allocated memory is still 255.9 MB. Free memory was 235.9 MB in the beginning and 234.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 12.38 ms. Allocated memory is still 255.9 MB. Free memory was 234.4 MB in the beginning and 233.5 MB in the end (delta: 879.3 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 188.12 ms. Allocated memory is still 255.9 MB. Free memory was 233.5 MB in the beginning and 241.0 MB in the end (delta: -7.5 MB). Peak memory consumption was 19.9 MB. Max. memory is 16.0 GB. * TraceAbstraction took 393.76 ms. Allocated memory is still 255.9 MB. Free memory was 240.5 MB in the beginning and 214.5 MB in the end (delta: 26.0 MB). Peak memory consumption was 27.3 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 45]: assertion can be violated assertion can be violated We found a FailurePath: [L17] 0 x := 0; VAL [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; VAL [g=1, n=0, n=0, res=23, x=0] [L31] 1 res := 23; VAL [g=1, n=0, n=0, res=23, res=23, x=0] [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: 6.8ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 301.8ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 48.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 54.6ms, 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, 7.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=50occurred 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: 4.7ms SsaConstructionTime, 19.8ms SatisfiabilityAnalysisTime, 44.1ms InterpolantComputationTime, 19 NumberOfCodeBlocks, 19 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 8 ConstructedInterpolants, 0 QuantifiedInterpolants, 18 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...