/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/showcase/PetersonWithBug.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-0e22065b97d0a1f8b3904e080cebe0f05e88d2b7-0e22065 [2021-06-10 23:57:51,841 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-10 23:57:51,843 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-10 23:57:51,865 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-06-10 23:57:51,866 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-06-10 23:57:51,867 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-06-10 23:57:51,868 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-06-10 23:57:51,870 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-06-10 23:57:51,871 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-06-10 23:57:51,872 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-06-10 23:57:51,873 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-06-10 23:57:51,873 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-06-10 23:57:51,874 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-06-10 23:57:51,875 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-06-10 23:57:51,875 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-06-10 23:57:51,876 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-06-10 23:57:51,877 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-06-10 23:57:51,878 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-06-10 23:57:51,879 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-06-10 23:57:51,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-06-10 23:57:51,882 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-06-10 23:57:51,883 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-06-10 23:57:51,884 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-06-10 23:57:51,885 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-06-10 23:57:51,887 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-06-10 23:57:51,890 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-06-10 23:57:51,891 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-06-10 23:57:51,892 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-06-10 23:57:51,892 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-06-10 23:57:51,893 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-06-10 23:57:51,894 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-06-10 23:57:51,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-06-10 23:57:51,895 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... 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[2021-06-10 23:57:51,897 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 [2021-06-10 23:57:51,915 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-10 23:57:51,915 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-10 23:57:51,916 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-10 23:57:51,916 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-10 23:57:51,917 INFO L138 SettingsManager]: * Use SBE=true [2021-06-10 23:57:51,917 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-10 23:57:51,917 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-10 23:57:51,917 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-10 23:57:51,917 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-10 23:57:51,917 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-10 23:57:51,918 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-10 23:57:51,918 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-10 23:57:51,918 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-10 23:57:51,918 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-10 23:57:51,918 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-10 23:57:51,918 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-10 23:57:51,918 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-10 23:57:51,919 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-10 23:57:51,919 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-10 23:57:51,919 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-10 23:57:51,919 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-10 23:57:51,919 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-10 23:57:51,919 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-10 23:57:51,920 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-10 23:57:51,920 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-10 23:57:51,920 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-10 23:57:51,920 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-10 23:57:51,920 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-10 23:57:51,920 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-10 23:57:52,232 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-10 23:57:52,258 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-10 23:57:52,260 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-10 23:57:52,261 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-10 23:57:52,265 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-10 23:57:52,266 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl [2021-06-10 23:57:52,266 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/regression/showcase/PetersonWithBug.bpl' [2021-06-10 23:57:52,311 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-10 23:57:52,313 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-10 23:57:52,314 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-10 23:57:52,314 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-10 23:57:52,314 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-10 23:57:52,326 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,332 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,341 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-10 23:57:52,344 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-10 23:57:52,344 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-10 23:57:52,345 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-10 23:57:52,352 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,352 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,353 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,354 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,357 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,361 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,362 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/1) ... [2021-06-10 23:57:52,363 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-10 23:57:52,365 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-10 23:57:52,365 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-10 23:57:52,365 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-10 23:57:52,367 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (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 [2021-06-10 23:57:52,441 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process0 given in one single declaration [2021-06-10 23:57:52,441 INFO L130 BoogieDeclarations]: Found specification of procedure Process0 [2021-06-10 23:57:52,441 INFO L138 BoogieDeclarations]: Found implementation of procedure Process0 [2021-06-10 23:57:52,443 INFO L124 BoogieDeclarations]: Specification and implementation of procedure Process1 given in one single declaration [2021-06-10 23:57:52,443 INFO L130 BoogieDeclarations]: Found specification of procedure Process1 [2021-06-10 23:57:52,443 INFO L138 BoogieDeclarations]: Found implementation of procedure Process1 [2021-06-10 23:57:52,444 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-10 23:57:52,444 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-10 23:57:52,444 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-10 23:57:52,445 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-10 23:57:52,589 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-10 23:57:52,589 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-06-10 23:57:52,591 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 11:57:52 BoogieIcfgContainer [2021-06-10 23:57:52,591 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-10 23:57:52,592 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-10 23:57:52,592 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-10 23:57:52,595 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-10 23:57:52,595 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.06 11:57:52" (1/2) ... [2021-06-10 23:57:52,596 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44b43bed and model type PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.06 11:57:52, skipping insertion in model container [2021-06-10 23:57:52,596 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.06 11:57:52" (2/2) ... [2021-06-10 23:57:52,597 INFO L111 eAbstractionObserver]: Analyzing ICFG PetersonWithBug.bpl [2021-06-10 23:57:52,602 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-10 23:57:52,605 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 2 error locations. [2021-06-10 23:57:52,606 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-10 23:57:52,625 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_x not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:57:52,626 WARN L313 ript$VariableManager]: TermVariabe Process0Thread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:57:52,629 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_a not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:57:52,629 WARN L313 ript$VariableManager]: TermVariabe Process1Thread1of1ForFork1_b not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-06-10 23:57:52,630 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-06-10 23:57:52,646 INFO L253 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-06-10 23:57:52,664 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-06-10 23:57:52,664 INFO L377 AbstractCegarLoop]: Hoare is false [2021-06-10 23:57:52,664 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-10 23:57:52,664 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-10 23:57:52,664 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-10 23:57:52,664 INFO L381 AbstractCegarLoop]: Difference is false [2021-06-10 23:57:52,665 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-10 23:57:52,665 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-10 23:57:52,673 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 26 transitions, 62 flow [2021-06-10 23:57:52,697 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-06-10 23:57:52,697 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:57:52,700 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. [2021-06-10 23:57:52,700 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 26 transitions, 62 flow [2021-06-10 23:57:52,704 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 29 places, 24 transitions, 54 flow [2021-06-10 23:57:52,716 INFO L168 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-06-10 23:57:52,728 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 29 places, 24 transitions, 54 flow [2021-06-10 23:57:52,731 INFO L138 LiptonReduction]: Starting Lipton reduction on Petri net that has 29 places, 24 transitions, 54 flow [2021-06-10 23:57:52,732 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 29 places, 24 transitions, 54 flow [2021-06-10 23:57:52,739 INFO L129 PetriNetUnfolder]: 2/24 cut-off events. [2021-06-10 23:57:52,739 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:57:52,739 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 47 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. [2021-06-10 23:57:52,741 INFO L151 LiptonReduction]: Number of co-enabled transitions 260 [2021-06-10 23:57:52,838 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,846 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:52,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,940 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:52,998 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:52,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:53,189 INFO L163 LiptonReduction]: Checked pairs total: 578 [2021-06-10 23:57:53,190 INFO L165 LiptonReduction]: Total number of compositions: 8 [2021-06-10 23:57:53,192 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 488 [2021-06-10 23:57:53,200 INFO L129 PetriNetUnfolder]: 0/5 cut-off events. [2021-06-10 23:57:53,200 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:57:53,200 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:57:53,201 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2021-06-10 23:57:53,201 INFO L428 AbstractCegarLoop]: === Iteration 1 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:57:53,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:57:53,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2397531, now seen corresponding path program 1 times [2021-06-10 23:57:53,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:57:53,212 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668525180] [2021-06-10 23:57:53,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:57:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:57:53,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:57:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:57:53,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668525180] [2021-06-10 23:57:53,308 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:57:53,308 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-06-10 23:57:53,309 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009833891] [2021-06-10 23:57:53,316 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-10 23:57:53,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:57:53,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-10 23:57:53,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-10 23:57:53,332 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 34 [2021-06-10 23:57:53,333 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 18 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-06-10 23:57:53,333 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:57:53,334 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 34 [2021-06-10 23:57:53,335 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:57:53,384 INFO L129 PetriNetUnfolder]: 19/57 cut-off events. [2021-06-10 23:57:53,385 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-06-10 23:57:53,386 INFO L84 FinitePrefix]: Finished finitePrefix Result has 105 conditions, 57 events. 19/57 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 133 event pairs, 1 based on Foata normal form. 12/65 useless extension candidates. Maximal degree in co-relation 96. Up to 26 conditions per place. [2021-06-10 23:57:53,389 INFO L132 encePairwiseOnDemand]: 23/34 looper letters, 8 selfloop transitions, 7 changer transitions 0/22 dead transitions. [2021-06-10 23:57:53,389 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 22 transitions, 80 flow [2021-06-10 23:57:53,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-10 23:57:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-10 23:57:53,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2021-06-10 23:57:53,400 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.7058823529411765 [2021-06-10 23:57:53,401 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 72 transitions. [2021-06-10 23:57:53,401 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 72 transitions. [2021-06-10 23:57:53,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:57:53,404 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 72 transitions. [2021-06-10 23:57:53,407 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 24.0) internal successors, (72), 3 states have internal predecessors, (72), 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) [2021-06-10 23:57:53,416 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-06-10 23:57:53,417 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 34.0) internal successors, (136), 4 states have internal predecessors, (136), 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) [2021-06-10 23:57:53,418 INFO L185 Difference]: Start difference. First operand has 23 places, 18 transitions, 42 flow. Second operand 3 states and 72 transitions. [2021-06-10 23:57:53,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 22 transitions, 80 flow [2021-06-10 23:57:53,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 21 places, 22 transitions, 78 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 23:57:53,426 INFO L241 Difference]: Finished difference. Result has 23 places, 22 transitions, 92 flow [2021-06-10 23:57:53,428 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=36, PETRI_DIFFERENCE_MINUEND_PLACES=19, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=9, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=23, PETRI_TRANSITIONS=22} [2021-06-10 23:57:53,429 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 0 predicate places. [2021-06-10 23:57:53,429 INFO L480 AbstractCegarLoop]: Abstraction has has 23 places, 22 transitions, 92 flow [2021-06-10 23:57:53,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 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) [2021-06-10 23:57:53,429 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:57:53,429 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:57:53,430 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-10 23:57:53,430 INFO L428 AbstractCegarLoop]: === Iteration 2 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:57:53,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:57:53,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1492004740, now seen corresponding path program 1 times [2021-06-10 23:57:53,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:57:53,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855891639] [2021-06-10 23:57:53,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:57:53,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:57:53,471 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,472 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:53,478 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,479 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:57:53,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:53,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,497 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:53,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:57:53,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855891639] [2021-06-10 23:57:53,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:57:53,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 23:57:53,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223371821] [2021-06-10 23:57:53,501 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 23:57:53,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:57:53,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 23:57:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-10 23:57:53,508 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 34 [2021-06-10 23:57:53,510 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 23 places, 22 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-06-10 23:57:53,511 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:57:53,511 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 34 [2021-06-10 23:57:53,511 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:57:53,551 INFO L129 PetriNetUnfolder]: 26/72 cut-off events. [2021-06-10 23:57:53,551 INFO L130 PetriNetUnfolder]: For 19/24 co-relation queries the response was YES. [2021-06-10 23:57:53,556 INFO L84 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 72 events. 26/72 cut-off events. For 19/24 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 189 event pairs, 4 based on Foata normal form. 9/80 useless extension candidates. Maximal degree in co-relation 186. Up to 31 conditions per place. [2021-06-10 23:57:53,558 INFO L132 encePairwiseOnDemand]: 28/34 looper letters, 4 selfloop transitions, 9 changer transitions 0/26 dead transitions. [2021-06-10 23:57:53,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 26 places, 26 transitions, 132 flow [2021-06-10 23:57:53,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 23:57:53,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 23:57:53,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2021-06-10 23:57:53,565 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6397058823529411 [2021-06-10 23:57:53,566 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 87 transitions. [2021-06-10 23:57:53,566 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 87 transitions. [2021-06-10 23:57:53,566 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:57:53,568 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 87 transitions. [2021-06-10 23:57:53,569 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 21.75) internal successors, (87), 4 states have internal predecessors, (87), 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) [2021-06-10 23:57:53,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2021-06-10 23:57:53,570 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2021-06-10 23:57:53,570 INFO L185 Difference]: Start difference. First operand has 23 places, 22 transitions, 92 flow. Second operand 4 states and 87 transitions. [2021-06-10 23:57:53,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 26 places, 26 transitions, 132 flow [2021-06-10 23:57:53,571 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 24 places, 26 transitions, 116 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-06-10 23:57:53,572 INFO L241 Difference]: Finished difference. Result has 26 places, 25 transitions, 120 flow [2021-06-10 23:57:53,572 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=22, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=120, PETRI_PLACES=26, PETRI_TRANSITIONS=25} [2021-06-10 23:57:53,573 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 3 predicate places. [2021-06-10 23:57:53,573 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 25 transitions, 120 flow [2021-06-10 23:57:53,573 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-06-10 23:57:53,573 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:57:53,573 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:57:53,573 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-10 23:57:53,574 INFO L428 AbstractCegarLoop]: === Iteration 3 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:57:53,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:57:53,574 INFO L82 PathProgramCache]: Analyzing trace with hash 251250800, now seen corresponding path program 2 times [2021-06-10 23:57:53,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:57:53,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355073589] [2021-06-10 23:57:53,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:57:53,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-10 23:57:53,587 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,588 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:53,588 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,589 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-06-10 23:57:53,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-10 23:57:53,598 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-10 23:57:53,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-10 23:57:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-10 23:57:53,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355073589] [2021-06-10 23:57:53,599 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-10 23:57:53,599 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-10 23:57:53,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410218517] [2021-06-10 23:57:53,600 INFO L460 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-10 23:57:53,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-10 23:57:53,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-10 23:57:53,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-06-10 23:57:53,602 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 34 [2021-06-10 23:57:53,603 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 26 places, 25 transitions, 120 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-06-10 23:57:53,603 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-10 23:57:53,603 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 34 [2021-06-10 23:57:53,603 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-10 23:57:53,643 INFO L129 PetriNetUnfolder]: 24/72 cut-off events. [2021-06-10 23:57:53,644 INFO L130 PetriNetUnfolder]: For 83/86 co-relation queries the response was YES. [2021-06-10 23:57:53,644 INFO L84 FinitePrefix]: Finished finitePrefix Result has 215 conditions, 72 events. 24/72 cut-off events. For 83/86 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 2 based on Foata normal form. 9/78 useless extension candidates. Maximal degree in co-relation 204. Up to 31 conditions per place. [2021-06-10 23:57:53,645 INFO L132 encePairwiseOnDemand]: 29/34 looper letters, 7 selfloop transitions, 7 changer transitions 0/30 dead transitions. [2021-06-10 23:57:53,645 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 30 transitions, 169 flow [2021-06-10 23:57:53,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-10 23:57:53,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2021-06-10 23:57:53,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2021-06-10 23:57:53,649 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.6470588235294118 [2021-06-10 23:57:53,649 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 88 transitions. [2021-06-10 23:57:53,649 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 88 transitions. [2021-06-10 23:57:53,650 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-10 23:57:53,650 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 88 transitions. [2021-06-10 23:57:53,651 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 22.0) internal successors, (88), 4 states have internal predecessors, (88), 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) [2021-06-10 23:57:53,652 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2021-06-10 23:57:53,653 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 34.0) internal successors, (170), 5 states have internal predecessors, (170), 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) [2021-06-10 23:57:53,653 INFO L185 Difference]: Start difference. First operand has 26 places, 25 transitions, 120 flow. Second operand 4 states and 88 transitions. [2021-06-10 23:57:53,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 30 transitions, 169 flow [2021-06-10 23:57:53,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 30 transitions, 160 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-10 23:57:53,658 INFO L241 Difference]: Finished difference. Result has 30 places, 28 transitions, 152 flow [2021-06-10 23:57:53,660 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=34, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=25, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=30, PETRI_TRANSITIONS=28} [2021-06-10 23:57:53,660 INFO L343 CegarLoopForPetriNet]: 23 programPoint places, 7 predicate places. [2021-06-10 23:57:53,660 INFO L480 AbstractCegarLoop]: Abstraction has has 30 places, 28 transitions, 152 flow [2021-06-10 23:57:53,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 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) [2021-06-10 23:57:53,661 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-06-10 23:57:53,661 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-10 23:57:53,661 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-10 23:57:53,661 INFO L428 AbstractCegarLoop]: === Iteration 4 === [Process0Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, Process1Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr1INUSE_VIOLATION, Process0Err0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION]=== [2021-06-10 23:57:53,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-10 23:57:53,662 INFO L82 PathProgramCache]: Analyzing trace with hash 1279332340, now seen corresponding path program 3 times [2021-06-10 23:57:53,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-10 23:57:53,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258200006] [2021-06-10 23:57:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-10 23:57:53,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 23:57:53,675 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 23:57:53,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-06-10 23:57:53,701 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-06-10 23:57:53,713 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-06-10 23:57:53,713 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-06-10 23:57:53,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-10 23:57:53,752 INFO L202 PluginConnector]: Adding new model PetersonWithBug.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.06 11:57:53 BasicIcfg [2021-06-10 23:57:53,752 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-10 23:57:53,753 INFO L168 Benchmark]: Toolchain (without parser) took 1440.54 ms. Allocated memory is still 348.1 MB. Free memory was 327.5 MB in the beginning and 332.2 MB in the end (delta: -4.7 MB). Peak memory consumption was 82.1 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:53,754 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.13 ms. Allocated memory is still 348.1 MB. Free memory is still 328.5 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 23:57:53,754 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.80 ms. Allocated memory is still 348.1 MB. Free memory was 327.3 MB in the beginning and 325.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-10 23:57:53,754 INFO L168 Benchmark]: Boogie Preprocessor took 19.30 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 325.0 MB in the end (delta: 872.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:53,755 INFO L168 Benchmark]: RCFGBuilder took 225.86 ms. Allocated memory is still 348.1 MB. Free memory was 324.9 MB in the beginning and 315.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:53,755 INFO L168 Benchmark]: TraceAbstraction took 1160.10 ms. Allocated memory is still 348.1 MB. Free memory was 314.9 MB in the beginning and 332.2 MB in the end (delta: -17.3 MB). Peak memory consumption was 69.5 MB. Max. memory is 16.0 GB. [2021-06-10 23:57:53,757 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 0.13 ms. Allocated memory is still 348.1 MB. Free memory is still 328.5 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 27.80 ms. Allocated memory is still 348.1 MB. Free memory was 327.3 MB in the beginning and 325.9 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.30 ms. Allocated memory is still 348.1 MB. Free memory was 325.9 MB in the beginning and 325.0 MB in the end (delta: 872.6 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 225.86 ms. Allocated memory is still 348.1 MB. Free memory was 324.9 MB in the beginning and 315.3 MB in the end (delta: 9.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1160.10 ms. Allocated memory is still 348.1 MB. Free memory was 314.9 MB in the beginning and 332.2 MB in the end (delta: -17.3 MB). Peak memory consumption was 69.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 458.7ms, 29 PlacesBefore, 23 PlacesAfterwards, 24 TransitionsBefore, 18 TransitionsAfterwards, 260 CoEnabledTransitionPairs, 3 FixpointIterations, 0 TrivialSequentialCompositions, 8 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 8 TotalNumberOfCompositions, 578 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 278, positive: 226, positive conditional: 0, positive unconditional: 226, negative: 52, negative conditional: 0, negative unconditional: 52, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 154, positive: 128, positive conditional: 0, positive unconditional: 128, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 154, positive: 128, positive conditional: 0, positive unconditional: 128, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 154, positive: 112, positive conditional: 0, positive unconditional: 112, negative: 42, negative conditional: 0, negative unconditional: 42, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 42, positive: 16, positive conditional: 0, positive unconditional: 16, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 169, positive: 65, positive conditional: 0, positive unconditional: 65, negative: 105, negative conditional: 0, negative unconditional: 105, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 278, positive: 98, positive conditional: 0, positive unconditional: 98, negative: 26, negative conditional: 0, negative unconditional: 26, unknown: 154, unknown conditional: 0, unknown unconditional: 154] , Statistics on independence cache: Total cache size (in pairs): 205, Positive cache size: 179, Positive conditional cache size: 0, Positive unconditional cache size: 179, Negative cache size: 26, Negative conditional cache size: 0, Negative unconditional cache size: 26 - 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; [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; [L39] 1 assume flag1 == 0 || 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: 2.3ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 1053.8ms, OverallIterations: 4, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 227.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 532.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 26 SDtfs, 7 SDslu, 3 SDs, 0 SdLazy, 24 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 28.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 29.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=152occurred 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: 8.2ms SsaConstructionTime, 28.0ms SatisfiabilityAnalysisTime, 104.9ms InterpolantComputationTime, 31 NumberOfCodeBlocks, 31 NumberOfCodeBlocksAsserted, 4 NumberOfCheckSat, 19 ConstructedInterpolants, 0 QuantifiedInterpolants, 51 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...