/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-VariableLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier-loop.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-d5b4239aa45c8d22a30959944f2ef622f7386a6d-d5b4239 [2021-03-24 15:09:49,404 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-24 15:09:49,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-24 15:09:49,442 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-24 15:09:49,489 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-24 15:09:49,490 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-24 15:09:49,490 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-24 15:09:49,491 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-VariableLbe.epf [2021-03-24 15:09:49,509 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-24 15:09:49,509 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-24 15:09:49,510 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-24 15:09:49,510 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-24 15:09:49,510 INFO L138 SettingsManager]: * Use SBE=true [2021-03-24 15:09:49,510 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-24 15:09:49,511 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-24 15:09:49,511 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-24 15:09:49,511 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-24 15:09:49,511 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-24 15:09:49,511 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-24 15:09:49,511 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-24 15:09:49,511 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-24 15:09:49,511 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-24 15:09:49,512 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-24 15:09:49,512 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-24 15:09:49,512 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-24 15:09:49,512 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-24 15:09:49,512 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-24 15:09:49,512 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-24 15:09:49,513 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-24 15:09:49,513 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-24 15:09:49,513 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-24 15:09:49,513 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-24 15:09:49,513 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-24 15:09:49,513 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-24 15:09:49,514 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-24 15:09:49,514 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2021-03-24 15:09:49,514 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-24 15:09:49,514 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-24 15:09:49,836 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-24 15:09:49,865 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-24 15:09:49,867 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-24 15:09:49,868 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-24 15:09:49,869 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-24 15:09:49,870 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier-loop.wvr.bpl [2021-03-24 15:09:49,871 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/barrier-loop.wvr.bpl' [2021-03-24 15:09:50,111 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-24 15:09:50,112 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-24 15:09:50,123 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-24 15:09:50,123 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-24 15:09:50,123 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-24 15:09:50,134 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,143 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,150 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-24 15:09:50,152 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-24 15:09:50,152 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-24 15:09:50,153 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-24 15:09:50,159 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,159 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,160 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,161 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,163 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,166 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,167 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/1) ... [2021-03-24 15:09:50,168 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-24 15:09:50,169 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-24 15:09:50,169 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-24 15:09:50,169 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-24 15:09:50,171 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (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 [2021-03-24 15:09:50,222 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-24 15:09:50,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-24 15:09:50,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-24 15:09:50,223 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-24 15:09:50,223 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-24 15:09:50,223 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-24 15:09:50,223 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-24 15:09:50,223 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-24 15:09:50,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-24 15:09:50,224 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-24 15:09:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-24 15:09:50,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-24 15:09:50,224 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-03-24 15:09:50,224 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-03-24 15:09:50,224 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-03-24 15:09:50,225 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread5 given in one single declaration [2021-03-24 15:09:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure thread5 [2021-03-24 15:09:50,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread5 [2021-03-24 15:09:50,225 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread6 given in one single declaration [2021-03-24 15:09:50,225 INFO L130 BoogieDeclarations]: Found specification of procedure thread6 [2021-03-24 15:09:50,225 INFO L138 BoogieDeclarations]: Found implementation of procedure thread6 [2021-03-24 15:09:50,226 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-24 15:09:50,440 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-24 15:09:50,440 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-03-24 15:09:50,442 INFO L202 PluginConnector]: Adding new model barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 03:09:50 BoogieIcfgContainer [2021-03-24 15:09:50,442 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-24 15:09:50,443 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-24 15:09:50,443 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-24 15:09:50,446 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-24 15:09:50,446 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 24.03 03:09:50" (1/2) ... [2021-03-24 15:09:50,447 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@555ca2e and model type barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.03 03:09:50, skipping insertion in model container [2021-03-24 15:09:50,447 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.03 03:09:50" (2/2) ... [2021-03-24 15:09:50,448 INFO L111 eAbstractionObserver]: Analyzing ICFG barrier-loop.wvr.bpl [2021-03-24 15:09:50,453 INFO L149 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-24 15:09:50,456 INFO L161 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-24 15:09:50,456 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-24 15:09:50,595 INFO L149 ThreadInstanceAdder]: Constructed 18 joinOtherThreadTransitions. [2021-03-24 15:09:50,611 INFO L253 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2021-03-24 15:09:50,628 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-24 15:09:50,628 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-24 15:09:50,628 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-24 15:09:50,628 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-24 15:09:50,629 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-24 15:09:50,629 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-24 15:09:50,629 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-24 15:09:50,629 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-24 15:09:50,639 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 84 places, 73 transitions, 218 flow [2021-03-24 15:09:50,701 INFO L129 PetriNetUnfolder]: 8/61 cut-off events. [2021-03-24 15:09:50,701 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-24 15:09:50,714 INFO L84 FinitePrefix]: Finished finitePrefix Result has 90 conditions, 61 events. 8/61 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 190 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 71. Up to 3 conditions per place. [2021-03-24 15:09:50,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 84 places, 73 transitions, 218 flow [2021-03-24 15:09:50,721 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 59 transitions, 166 flow [2021-03-24 15:09:50,723 INFO L174 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2021-03-24 15:09:50,732 INFO L137 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 70 places, 59 transitions, 166 flow [2021-03-24 15:09:50,739 INFO L129 LiptonReduction]: Starting Lipton reduction on Petri net that has 70 places, 59 transitions, 166 flow [2021-03-24 15:09:50,740 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 70 places, 59 transitions, 166 flow [2021-03-24 15:09:50,767 INFO L129 PetriNetUnfolder]: 8/59 cut-off events. [2021-03-24 15:09:50,768 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-24 15:09:50,768 INFO L84 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 59 events. 8/59 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 183 event pairs, 0 based on Foata normal form. 0/51 useless extension candidates. Maximal degree in co-relation 71. Up to 3 conditions per place. [2021-03-24 15:09:50,771 INFO L142 LiptonReduction]: Number of co-enabled transitions 1888 [2021-03-24 15:09:50,847 INFO L154 LiptonReduction]: Checked pairs total: 600 [2021-03-24 15:09:50,847 INFO L156 LiptonReduction]: Total number of compositions: 1 [2021-03-24 15:09:50,849 INFO L199 CegarLoopForPetriNet]: Time needed for LBE in milliseconds: 127 [2021-03-24 15:09:50,881 INFO L129 PetriNetUnfolder]: 8/57 cut-off events. [2021-03-24 15:09:50,881 INFO L130 PetriNetUnfolder]: For 6/6 co-relation queries the response was YES. [2021-03-24 15:09:50,881 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:09:50,882 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:09:50,882 INFO L428 AbstractCegarLoop]: === Iteration 1 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:09:50,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:09:50,887 INFO L82 PathProgramCache]: Analyzing trace with hash -871171209, now seen corresponding path program 1 times [2021-03-24 15:09:50,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:09:50,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923032624] [2021-03-24 15:09:50,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:09:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:09:51,032 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,033 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-24 15:09:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:09:51,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923032624] [2021-03-24 15:09:51,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:09:51,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2021-03-24 15:09:51,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988173742] [2021-03-24 15:09:51,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 15:09:51,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:09:51,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 15:09:51,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 15:09:51,067 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 78 [2021-03-24 15:09:51,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 58 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:09:51,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 78 [2021-03-24 15:09:51,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:09:51,424 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([203] thread4EXIT-->L119: Formula: (and (= v_thread4Thread1of1ForFork3_thidvar0_4 4) (= v_thread4Thread1of1ForFork3_thidvar3_4 4) (= v_thread4Thread1of1ForFork3_thidvar1_4 4) (= v_thread4Thread1of1ForFork3_thidvar2_4 4)) InVars {thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_4, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_4, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_4, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_4} OutVars{thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_4, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_4, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_4, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_4} AuxVars[] AssignedVars[][60], [thread3Thread1of1ForFork1NotInUse, thread5Thread1of1ForFork4NotInUse, thread4Thread1of1ForFork3NotInUse, thread1Thread1of1ForFork2NotInUse, 88#true, 72#L119true, thread6Thread1of1ForFork5NotInUse, thread2Thread1of1ForFork0NotInUse]) [2021-03-24 15:09:51,425 INFO L384 tUnfolder$Statistics]: this new event has 29 ancestors and is not cut-off event [2021-03-24 15:09:51,425 INFO L387 tUnfolder$Statistics]: existing Event has 37 ancestors and is not cut-off event [2021-03-24 15:09:51,425 INFO L387 tUnfolder$Statistics]: existing Event has 37 ancestors and is not cut-off event [2021-03-24 15:09:51,425 INFO L387 tUnfolder$Statistics]: existing Event has 29 ancestors and is not cut-off event [2021-03-24 15:09:51,459 INFO L129 PetriNetUnfolder]: 1975/3928 cut-off events. [2021-03-24 15:09:51,459 INFO L130 PetriNetUnfolder]: For 154/154 co-relation queries the response was YES. [2021-03-24 15:09:51,481 INFO L84 FinitePrefix]: Finished finitePrefix Result has 6571 conditions, 3928 events. 1975/3928 cut-off events. For 154/154 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 28997 event pairs, 737 based on Foata normal form. 1/3649 useless extension candidates. Maximal degree in co-relation 6543. Up to 2309 conditions per place. [2021-03-24 15:09:51,511 INFO L132 encePairwiseOnDemand]: 72/78 looper letters, 21 selfloop transitions, 5 changer transitions 0/66 dead transitions. [2021-03-24 15:09:51,511 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 66 transitions, 232 flow [2021-03-24 15:09:51,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 15:09:51,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 15:09:51,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 201 transitions. [2021-03-24 15:09:51,523 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.8589743589743589 [2021-03-24 15:09:51,524 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 201 transitions. [2021-03-24 15:09:51,524 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 201 transitions. [2021-03-24 15:09:51,527 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:09:51,529 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 201 transitions. [2021-03-24 15:09:51,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 67.0) internal successors, (201), 3 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,547 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,547 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,549 INFO L185 Difference]: Start difference. First operand has 69 places, 58 transitions, 164 flow. Second operand 3 states and 201 transitions. [2021-03-24 15:09:51,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 66 transitions, 232 flow [2021-03-24 15:09:51,562 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 200 flow, removed 0 selfloop flow, removed 12 redundant places. [2021-03-24 15:09:51,565 INFO L241 Difference]: Finished difference. Result has 60 places, 62 transitions, 165 flow [2021-03-24 15:09:51,567 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=165, PETRI_PLACES=60, PETRI_TRANSITIONS=62} [2021-03-24 15:09:51,567 INFO L343 CegarLoopForPetriNet]: 69 programPoint places, -9 predicate places. [2021-03-24 15:09:51,567 INFO L480 AbstractCegarLoop]: Abstraction has has 60 places, 62 transitions, 165 flow [2021-03-24 15:09:51,568 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 58.666666666666664) internal successors, (176), 3 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,568 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:09:51,568 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:09:51,568 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-24 15:09:51,568 INFO L428 AbstractCegarLoop]: === Iteration 2 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:09:51,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:09:51,569 INFO L82 PathProgramCache]: Analyzing trace with hash -992939024, now seen corresponding path program 1 times [2021-03-24 15:09:51,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:09:51,570 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739386235] [2021-03-24 15:09:51,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:09:51,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:09:51,616 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,617 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:09:51,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-24 15:09:51,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:09:51,623 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:09:51,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739386235] [2021-03-24 15:09:51,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:09:51,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 15:09:51,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230025346] [2021-03-24 15:09:51,626 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 15:09:51,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:09:51,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 15:09:51,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 15:09:51,629 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 78 [2021-03-24 15:09:51,630 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 62 transitions, 165 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,630 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:09:51,630 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 78 [2021-03-24 15:09:51,631 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:09:51,674 INFO L129 PetriNetUnfolder]: 101/344 cut-off events. [2021-03-24 15:09:51,675 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-03-24 15:09:51,680 INFO L84 FinitePrefix]: Finished finitePrefix Result has 463 conditions, 344 events. 101/344 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 1667 event pairs, 14 based on Foata normal form. 6/283 useless extension candidates. Maximal degree in co-relation 444. Up to 84 conditions per place. [2021-03-24 15:09:51,683 INFO L132 encePairwiseOnDemand]: 73/78 looper letters, 3 selfloop transitions, 4 changer transitions 0/64 dead transitions. [2021-03-24 15:09:51,684 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 64 transitions, 183 flow [2021-03-24 15:09:51,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 15:09:51,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 15:09:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-03-24 15:09:51,693 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9572649572649573 [2021-03-24 15:09:51,693 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,693 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,694 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:09:51,694 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,695 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,697 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,698 INFO L185 Difference]: Start difference. First operand has 60 places, 62 transitions, 165 flow. Second operand 3 states and 224 transitions. [2021-03-24 15:09:51,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 64 transitions, 183 flow [2021-03-24 15:09:51,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 64 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-24 15:09:51,700 INFO L241 Difference]: Finished difference. Result has 63 places, 64 transitions, 186 flow [2021-03-24 15:09:51,700 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=186, PETRI_PLACES=63, PETRI_TRANSITIONS=64} [2021-03-24 15:09:51,701 INFO L343 CegarLoopForPetriNet]: 69 programPoint places, -6 predicate places. [2021-03-24 15:09:51,701 INFO L480 AbstractCegarLoop]: Abstraction has has 63 places, 64 transitions, 186 flow [2021-03-24 15:09:51,701 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,701 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:09:51,701 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:09:51,702 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-24 15:09:51,702 INFO L428 AbstractCegarLoop]: === Iteration 3 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:09:51,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:09:51,702 INFO L82 PathProgramCache]: Analyzing trace with hash 88735810, now seen corresponding path program 1 times [2021-03-24 15:09:51,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:09:51,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623211756] [2021-03-24 15:09:51,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:09:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:09:51,753 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,754 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:09:51,755 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-24 15:09:51,760 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,761 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:09:51,762 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:09:51,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623211756] [2021-03-24 15:09:51,762 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:09:51,762 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 15:09:51,762 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474734726] [2021-03-24 15:09:51,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 15:09:51,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:09:51,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 15:09:51,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 15:09:51,764 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 78 [2021-03-24 15:09:51,764 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 64 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,764 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:09:51,765 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 78 [2021-03-24 15:09:51,765 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:09:51,837 INFO L129 PetriNetUnfolder]: 150/497 cut-off events. [2021-03-24 15:09:51,837 INFO L130 PetriNetUnfolder]: For 22/22 co-relation queries the response was YES. [2021-03-24 15:09:51,840 INFO L84 FinitePrefix]: Finished finitePrefix Result has 708 conditions, 497 events. 150/497 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 2662 event pairs, 34 based on Foata normal form. 8/410 useless extension candidates. Maximal degree in co-relation 688. Up to 122 conditions per place. [2021-03-24 15:09:51,842 INFO L132 encePairwiseOnDemand]: 73/78 looper letters, 3 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2021-03-24 15:09:51,842 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 66 transitions, 204 flow [2021-03-24 15:09:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 15:09:51,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 15:09:51,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-03-24 15:09:51,844 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9572649572649573 [2021-03-24 15:09:51,844 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,844 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:09:51,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,845 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,846 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,847 INFO L185 Difference]: Start difference. First operand has 63 places, 64 transitions, 186 flow. Second operand 3 states and 224 transitions. [2021-03-24 15:09:51,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 66 transitions, 204 flow [2021-03-24 15:09:51,850 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 66 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 15:09:51,851 INFO L241 Difference]: Finished difference. Result has 65 places, 66 transitions, 204 flow [2021-03-24 15:09:51,851 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=204, PETRI_PLACES=65, PETRI_TRANSITIONS=66} [2021-03-24 15:09:51,852 INFO L343 CegarLoopForPetriNet]: 69 programPoint places, -4 predicate places. [2021-03-24 15:09:51,852 INFO L480 AbstractCegarLoop]: Abstraction has has 65 places, 66 transitions, 204 flow [2021-03-24 15:09:51,852 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,852 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:09:51,852 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:09:51,852 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-24 15:09:51,852 INFO L428 AbstractCegarLoop]: === Iteration 4 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:09:51,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:09:51,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1156811842, now seen corresponding path program 1 times [2021-03-24 15:09:51,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:09:51,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955135557] [2021-03-24 15:09:51,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:09:51,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:09:51,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:09:51,882 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-24 15:09:51,885 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:51,885 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:09:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:09:51,886 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955135557] [2021-03-24 15:09:51,886 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:09:51,886 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 15:09:51,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879621317] [2021-03-24 15:09:51,887 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 15:09:51,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:09:51,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 15:09:51,888 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 15:09:51,889 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 78 [2021-03-24 15:09:51,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 66 transitions, 204 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:09:51,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 78 [2021-03-24 15:09:51,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:09:51,936 INFO L382 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([203] thread4EXIT-->L119: Formula: (and (= v_thread4Thread1of1ForFork3_thidvar0_4 4) (= v_thread4Thread1of1ForFork3_thidvar3_4 4) (= v_thread4Thread1of1ForFork3_thidvar1_4 4) (= v_thread4Thread1of1ForFork3_thidvar2_4 4)) InVars {thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_4, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_4, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_4, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_4} OutVars{thread4Thread1of1ForFork3_thidvar1=v_thread4Thread1of1ForFork3_thidvar1_4, thread4Thread1of1ForFork3_thidvar0=v_thread4Thread1of1ForFork3_thidvar0_4, thread4Thread1of1ForFork3_thidvar3=v_thread4Thread1of1ForFork3_thidvar3_4, thread4Thread1of1ForFork3_thidvar2=v_thread4Thread1of1ForFork3_thidvar2_4} AuxVars[] AssignedVars[][46], [Black: 93#true, 101#(not f1_2), Black: 99#true, 72#L119true, 107#(not f2_11), Black: 90#(and (= y_1 y_9) (= x_0 x_8))]) [2021-03-24 15:09:51,936 INFO L384 tUnfolder$Statistics]: this new event has 53 ancestors and is cut-off event [2021-03-24 15:09:51,936 INFO L387 tUnfolder$Statistics]: existing Event has 29 ancestors and is cut-off event [2021-03-24 15:09:51,936 INFO L387 tUnfolder$Statistics]: existing Event has 37 ancestors and is cut-off event [2021-03-24 15:09:51,936 INFO L387 tUnfolder$Statistics]: existing Event has 45 ancestors and is cut-off event [2021-03-24 15:09:51,952 INFO L129 PetriNetUnfolder]: 204/659 cut-off events. [2021-03-24 15:09:51,952 INFO L130 PetriNetUnfolder]: For 20/20 co-relation queries the response was YES. [2021-03-24 15:09:51,956 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1015 conditions, 659 events. 204/659 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 3995 event pairs, 54 based on Foata normal form. 38/565 useless extension candidates. Maximal degree in co-relation 993. Up to 183 conditions per place. [2021-03-24 15:09:51,960 INFO L132 encePairwiseOnDemand]: 73/78 looper letters, 3 selfloop transitions, 4 changer transitions 0/68 dead transitions. [2021-03-24 15:09:51,960 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 68 transitions, 222 flow [2021-03-24 15:09:51,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 15:09:51,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 15:09:51,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-03-24 15:09:51,961 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9572649572649573 [2021-03-24 15:09:51,962 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,962 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,962 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:09:51,962 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-03-24 15:09:51,962 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,963 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,964 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,967 INFO L185 Difference]: Start difference. First operand has 65 places, 66 transitions, 204 flow. Second operand 3 states and 224 transitions. [2021-03-24 15:09:51,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 68 transitions, 222 flow [2021-03-24 15:09:51,968 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 68 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 15:09:51,971 INFO L241 Difference]: Finished difference. Result has 67 places, 68 transitions, 222 flow [2021-03-24 15:09:51,972 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=222, PETRI_PLACES=67, PETRI_TRANSITIONS=68} [2021-03-24 15:09:51,972 INFO L343 CegarLoopForPetriNet]: 69 programPoint places, -2 predicate places. [2021-03-24 15:09:51,972 INFO L480 AbstractCegarLoop]: Abstraction has has 67 places, 68 transitions, 222 flow [2021-03-24 15:09:51,972 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:51,972 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:09:51,973 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:09:51,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-24 15:09:51,973 INFO L428 AbstractCegarLoop]: === Iteration 5 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:09:51,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:09:51,973 INFO L82 PathProgramCache]: Analyzing trace with hash -809591954, now seen corresponding path program 1 times [2021-03-24 15:09:51,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:09:51,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202922305] [2021-03-24 15:09:51,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:09:51,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-24 15:09:52,008 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:52,008 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:09:52,009 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:52,009 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-24 15:09:52,012 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-24 15:09:52,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-24 15:09:52,013 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-24 15:09:52,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202922305] [2021-03-24 15:09:52,013 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-24 15:09:52,013 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-24 15:09:52,013 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274877680] [2021-03-24 15:09:52,014 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-24 15:09:52,014 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-24 15:09:52,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-24 15:09:52,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-24 15:09:52,015 INFO L508 CegarLoopForPetriNet]: Number of universal loopers: 72 out of 78 [2021-03-24 15:09:52,015 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 68 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:52,015 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-24 15:09:52,015 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 72 of 78 [2021-03-24 15:09:52,015 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-24 15:09:52,098 INFO L129 PetriNetUnfolder]: 295/962 cut-off events. [2021-03-24 15:09:52,098 INFO L130 PetriNetUnfolder]: For 89/89 co-relation queries the response was YES. [2021-03-24 15:09:52,104 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1646 conditions, 962 events. 295/962 cut-off events. For 89/89 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 6868 event pairs, 96 based on Foata normal form. 32/781 useless extension candidates. Maximal degree in co-relation 1624. Up to 242 conditions per place. [2021-03-24 15:09:52,109 INFO L132 encePairwiseOnDemand]: 73/78 looper letters, 3 selfloop transitions, 4 changer transitions 0/70 dead transitions. [2021-03-24 15:09:52,110 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 70 transitions, 240 flow [2021-03-24 15:09:52,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-24 15:09:52,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-03-24 15:09:52,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2021-03-24 15:09:52,112 INFO L553 CegarLoopForPetriNet]: DFA transition density 0.9572649572649573 [2021-03-24 15:09:52,112 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 224 transitions. [2021-03-24 15:09:52,112 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 224 transitions. [2021-03-24 15:09:52,112 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-24 15:09:52,112 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 224 transitions. [2021-03-24 15:09:52,113 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 74.66666666666667) internal successors, (224), 3 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:52,113 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:52,114 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 78.0) internal successors, (312), 4 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:52,114 INFO L185 Difference]: Start difference. First operand has 67 places, 68 transitions, 222 flow. Second operand 3 states and 224 transitions. [2021-03-24 15:09:52,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 70 transitions, 240 flow [2021-03-24 15:09:52,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 70 transitions, 232 flow, removed 0 selfloop flow, removed 2 redundant places. [2021-03-24 15:09:52,118 INFO L241 Difference]: Finished difference. Result has 69 places, 70 transitions, 240 flow [2021-03-24 15:09:52,118 INFO L326 CegarLoopForPetriNet]: {PETRI_ALPHABET=78, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2021-03-24 15:09:52,119 INFO L343 CegarLoopForPetriNet]: 69 programPoint places, 0 predicate places. [2021-03-24 15:09:52,119 INFO L480 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 240 flow [2021-03-24 15:09:52,119 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 73.0) internal successors, (219), 3 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-24 15:09:52,119 INFO L255 CegarLoopForPetriNet]: Found error trace [2021-03-24 15:09:52,119 INFO L263 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-24 15:09:52,119 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-24 15:09:52,119 INFO L428 AbstractCegarLoop]: === Iteration 6 === [thread1Err3INUSE_VIOLATION, thread4Err0INUSE_VIOLATION, thread4Thread1of1ForFork3Err8INUSE_VIOLATION, thread4Thread1of1ForFork3Err9INUSE_VIOLATION, thread1Err7INUSE_VIOLATION, thread1Thread1of1ForFork2Err1INUSE_VIOLATION, thread4Err4INUSE_VIOLATION, ULTIMATE.startErr6INUSE_VIOLATION, thread1Thread1of1ForFork2Err2INUSE_VIOLATION, ULTIMATE.startErr5INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-24 15:09:52,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-24 15:09:52,120 INFO L82 PathProgramCache]: Analyzing trace with hash 857017657, now seen corresponding path program 1 times [2021-03-24 15:09:52,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-24 15:09:52,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499285305] [2021-03-24 15:09:52,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-24 15:09:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 15:09:52,144 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 15:09:52,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-03-24 15:09:52,162 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-03-24 15:09:52,190 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-03-24 15:09:52,190 INFO L634 BasicCegarLoop]: Counterexample might be feasible [2021-03-24 15:09:52,190 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-24 15:09:52,232 INFO L202 PluginConnector]: Adding new model barrier-loop.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.03 03:09:52 BasicIcfg [2021-03-24 15:09:52,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-24 15:09:52,233 INFO L168 Benchmark]: Toolchain (without parser) took 2120.65 ms. Allocated memory is still 331.4 MB. Free memory was 311.5 MB in the beginning and 231.6 MB in the end (delta: 80.0 MB). Peak memory consumption was 81.6 MB. Max. memory is 16.0 GB. [2021-03-24 15:09:52,233 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.89 ms. Allocated memory is still 331.4 MB. Free memory was 312.9 MB in the beginning and 312.7 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:09:52,233 INFO L168 Benchmark]: Boogie Procedure Inliner took 28.56 ms. Allocated memory is still 331.4 MB. Free memory was 311.5 MB in the beginning and 310.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-24 15:09:52,234 INFO L168 Benchmark]: Boogie Preprocessor took 16.18 ms. Allocated memory is still 331.4 MB. Free memory was 310.0 MB in the beginning and 309.0 MB in the end (delta: 971.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-24 15:09:52,234 INFO L168 Benchmark]: RCFGBuilder took 272.99 ms. Allocated memory is still 331.4 MB. Free memory was 308.9 MB in the beginning and 293.7 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-03-24 15:09:52,234 INFO L168 Benchmark]: TraceAbstraction took 1788.48 ms. Allocated memory is still 331.4 MB. Free memory was 293.3 MB in the beginning and 231.6 MB in the end (delta: 61.7 MB). Peak memory consumption was 62.7 MB. Max. memory is 16.0 GB. [2021-03-24 15:09:52,236 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 0.89 ms. Allocated memory is still 331.4 MB. Free memory was 312.9 MB in the beginning and 312.7 MB in the end (delta: 136.4 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 28.56 ms. Allocated memory is still 331.4 MB. Free memory was 311.5 MB in the beginning and 310.0 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 16.18 ms. Allocated memory is still 331.4 MB. Free memory was 310.0 MB in the beginning and 309.0 MB in the end (delta: 971.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 272.99 ms. Allocated memory is still 331.4 MB. Free memory was 308.9 MB in the beginning and 293.7 MB in the end (delta: 15.1 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 1788.48 ms. Allocated memory is still 331.4 MB. Free memory was 293.3 MB in the beginning and 231.6 MB in the end (delta: 61.7 MB). Peak memory consumption was 62.7 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 108.4ms, 70 PlacesBefore, 69 PlacesAfterwards, 59 TransitionsBefore, 58 TransitionsAfterwards, 1888 CoEnabledTransitionPairs, 2 FixpointIterations, 1 TrivialSequentialCompositions, 0 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 0 ConcurrentYvCompositions, 0 ChoiceCompositions, 1 TotalNumberOfCompositions, 600 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 217, positive: 201, positive conditional: 0, positive unconditional: 201, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: ConditionTransformingIndependenceRelation.Independence Queries: [ total: 108, positive: 101, positive conditional: 0, positive unconditional: 101, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ConditionTransformingIndependenceRelation.Statistics on underlying relation: SyntacticIndependenceRelation.Independence Queries: [ total: 108, positive: 101, positive conditional: 0, positive unconditional: 101, negative: 7, negative conditional: 0, negative unconditional: 7, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , Cache Queries: [ total: 217, positive: 100, positive conditional: 0, positive unconditional: 100, negative: 9, negative conditional: 0, negative unconditional: 9, unknown: 108, unknown conditional: 0, unknown unconditional: 108] , Statistics on independence cache: Total cache size (in pairs): 108, Positive cache size: 101, Positive conditional cache size: 0, Positive unconditional cache size: 101, Negative cache size: 7, Negative conditional cache size: 0, Negative unconditional cache size: 7 - CounterExampleResult [Line: 121]: assertion can be violated assertion can be violated We found a FailurePath: [L115] 0 assume x_0 == x_8 && y_1 == y_9; VAL [x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L116] FORK 0 fork 1 thread1(); VAL [x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L60] 1 f1_2 := false; [L61] 1 f2_3 := false; VAL [f1_2=false, f2_3=false, x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L63] FORK 1 fork 2, 2 thread2(); VAL [f1_2=false, f2_3=false, x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L30] 2 temp_4 := x_0; VAL [f1_2=false, f2_3=false, temp_4=-1, x_0=-1, x_8=-1, y_1=-1, y_9=-1] [L31] 2 x_0 := temp_4 + 1; VAL [f1_2=false, f2_3=false, temp_4=-1, x_0=0, x_8=-1, y_1=-1, y_9=-1] [L64] FORK 1 fork 3, 3, 3 thread3(); VAL [f1_2=false, f2_3=false, temp_4=-1, x_0=0, x_8=-1, y_1=-1, y_9=-1] [L45] 3 temp_6 := y_1; VAL [f1_2=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=-1, y_9=-1] [L46] 3 y_1 := temp_6 + 1; VAL [f1_2=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L117] FORK 0 fork 4, 4, 4, 4 thread4(); VAL [f1_2=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L103] 4 f1_10 := false; [L104] 4 f2_11 := false; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L106] FORK 4 fork 5, 5, 5, 5, 5 thread5(); VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L107] FORK 4 fork 6, 6, 6, 6, 6, 6 thread6(); VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L108] JOIN 5 join 5, 5, 5, 5, 5; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L109] JOIN 6 join 6, 6, 6, 6, 6, 6; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L47] 3 f2_3 := true; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L32] 2 f1_2 := true; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L48] 3 assume f1_2; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, x_0=0, x_8=-1, y_1=0, y_9=-1] [L49] 3 temp_7 := x_0; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, temp_7=0, x_0=0, x_8=-1, y_1=0, y_9=-1] [L50] 3 x_0 := temp_7 + 1; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=0, y_9=-1] [L33] 2 assume f2_3; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=true, temp_4=-1, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=0, y_9=-1] [L51] 3 f2_3 := false; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=false, temp_4=-1, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=0, y_9=-1] [L34] 2 temp_5 := y_1; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=0, y_9=-1] [L35] 2 y_1 := temp_5 + 1; VAL [f1_10=false, f1_2=true, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L36] 2 f1_2 := false; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L52] 3 assume !f1_2; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L37] 2 assume !f2_3; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L65] JOIN 2 join 2, 2; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L66] JOIN 3 join 3, 3, 3; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L118] JOIN 1 join 1; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L119] JOIN 4 join 4, 4, 4, 4; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] [L120] 0 assume !(x_0 == x_8 && y_1 == y_9); [L121] 0 assert false; VAL [f1_10=false, f1_2=false, f2_11=false, f2_3=false, temp_4=-1, temp_5=0, temp_6=-1, temp_7=0, x_0=1, x_8=-1, y_1=1, y_9=-1] - StatisticsResult: Ultimate Automizer benchmark data CFG has 7 procedures, 60 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 26.2ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 1566.3ms, OverallIterations: 6, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 856.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 225.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 4 SDslu, 0 SDs, 0 SdLazy, 33 SolverSat, 8 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=240occurred in iteration=5, InterpolantAutomatonStates: 15, 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: 22.0ms SsaConstructionTime, 82.3ms SatisfiabilityAnalysisTime, 174.1ms InterpolantComputationTime, 180 NumberOfCodeBlocks, 180 NumberOfCodeBlocksAsserted, 6 NumberOfCheckSat, 137 ConstructedInterpolants, 0 QuantifiedInterpolants, 298 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 5 InterpolantComputations, 5 PerfectInterpolantSequences, 4/4 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...