/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-11 06:29:14,551 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-11 06:29:14,554 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-11 06:29:14,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-11 06:29:14,615 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-11 06:29:14,617 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-11 06:29:14,618 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-11 06:29:14,620 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-11 06:29:14,622 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-11 06:29:14,623 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-11 06:29:14,626 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-11 06:29:14,633 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-11 06:29:14,634 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-11 06:29:14,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-11 06:29:14,637 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-11 06:29:14,638 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-11 06:29:14,640 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-11 06:29:14,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-11 06:29:14,646 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-11 06:29:14,649 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-11 06:29:14,650 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe.epf [2021-03-11 06:29:14,685 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-11 06:29:14,685 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-11 06:29:14,688 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-11 06:29:14,688 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-11 06:29:14,688 INFO L138 SettingsManager]: * Use SBE=true [2021-03-11 06:29:14,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-11 06:29:14,689 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-11 06:29:14,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-11 06:29:14,689 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-11 06:29:14,689 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-11 06:29:14,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-11 06:29:14,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-11 06:29:14,690 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-11 06:29:14,690 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-11 06:29:14,690 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-11 06:29:14,691 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-11 06:29:14,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-11 06:29:14,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-11 06:29:14,691 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-11 06:29:14,691 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-11 06:29:14,691 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-11 06:29:14,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:29:14,692 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-11 06:29:14,692 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-11 06:29:14,692 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-11 06:29:14,692 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-11 06:29:14,692 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-11 06:29:14,692 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-11 06:29:14,693 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-03-11 06:29:14,693 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-11 06:29:15,013 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-11 06:29:15,030 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-11 06:29:15,032 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-11 06:29:15,033 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-11 06:29:15,033 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-11 06:29:15,034 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl [2021-03-11 06:29:15,034 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/ticket-3.wvr.bpl' [2021-03-11 06:29:15,070 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-11 06:29:15,074 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-11 06:29:15,076 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-11 06:29:15,076 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-11 06:29:15,076 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-11 06:29:15,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,091 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,097 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-11 06:29:15,098 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-11 06:29:15,098 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-11 06:29:15,098 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-11 06:29:15,104 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,105 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,106 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,106 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,109 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,110 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,110 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... [2021-03-11 06:29:15,111 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-11 06:29:15,112 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-11 06:29:15,112 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-11 06:29:15,112 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-11 06:29:15,113 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-11 06:29:15,174 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-11 06:29:15,174 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-11 06:29:15,175 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-11 06:29:15,176 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-11 06:29:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-11 06:29:15,176 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-11 06:29:15,176 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-11 06:29:15,176 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-11 06:29:15,176 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-11 06:29:15,176 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-11 06:29:15,177 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-11 06:29:15,177 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-11 06:29:15,177 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-11 06:29:15,409 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-11 06:29:15,410 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-11 06:29:15,411 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:29:15 BoogieIcfgContainer [2021-03-11 06:29:15,411 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-11 06:29:15,412 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-11 06:29:15,413 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-11 06:29:15,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-11 06:29:15,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 11.03 06:29:15" (1/2) ... [2021-03-11 06:29:15,415 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c2f1642 and model type ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.03 06:29:15, skipping insertion in model container [2021-03-11 06:29:15,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.03 06:29:15" (2/2) ... [2021-03-11 06:29:15,417 INFO L111 eAbstractionObserver]: Analyzing ICFG ticket-3.wvr.bpl [2021-03-11 06:29:15,421 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-11 06:29:15,440 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-11 06:29:15,440 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-11 06:29:15,481 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-11 06:29:15,507 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-11 06:29:15,527 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-11 06:29:15,528 INFO L377 AbstractCegarLoop]: Hoare is false [2021-03-11 06:29:15,528 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-11 06:29:15,528 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-11 06:29:15,528 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-11 06:29:15,528 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-11 06:29:15,528 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-11 06:29:15,528 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-11 06:29:15,535 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 40 places, 30 transitions, 84 flow [2021-03-11 06:29:15,555 INFO L129 PetriNetUnfolder]: 0/27 cut-off events. [2021-03-11 06:29:15,555 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 06:29:15,557 INFO L84 FinitePrefix]: Finished finitePrefix Result has 40 conditions, 27 events. 0/27 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 33 event pairs, 0 based on Foata normal form. 0/26 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-03-11 06:29:15,557 INFO L82 GeneralOperation]: Start removeDead. Operand has 40 places, 30 transitions, 84 flow [2021-03-11 06:29:15,560 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 35 places, 25 transitions, 68 flow [2021-03-11 06:29:15,569 INFO L129 PetriNetUnfolder]: 0/24 cut-off events. [2021-03-11 06:29:15,569 INFO L130 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2021-03-11 06:29:15,569 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:15,570 INFO L255 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] [2021-03-11 06:29:15,570 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:15,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:15,574 INFO L82 PathProgramCache]: Analyzing trace with hash 928567053, now seen corresponding path program 1 times [2021-03-11 06:29:15,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:15,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446811655] [2021-03-11 06:29:15,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:15,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:15,715 INFO L142 QuantifierPusher]: treesize reduction 11, result has 52.2 percent of original size [2021-03-11 06:29:15,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-03-11 06:29:15,734 INFO L142 QuantifierPusher]: treesize reduction 4, result has 60.0 percent of original size [2021-03-11 06:29:15,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 6 [2021-03-11 06:29:15,741 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-11 06:29:15,746 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,747 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:15,754 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,755 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-03-11 06:29:15,756 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,756 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:15,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446811655] [2021-03-11 06:29:15,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:15,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:15,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270921200] [2021-03-11 06:29:15,765 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:15,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:15,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:15,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:15,778 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 30 [2021-03-11 06:29:15,781 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 25 transitions, 68 flow. Second operand has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:15,781 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:15,781 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 30 [2021-03-11 06:29:15,782 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:15,843 INFO L129 PetriNetUnfolder]: 43/165 cut-off events. [2021-03-11 06:29:15,843 INFO L130 PetriNetUnfolder]: For 12/12 co-relation queries the response was YES. [2021-03-11 06:29:15,846 INFO L84 FinitePrefix]: Finished finitePrefix Result has 278 conditions, 165 events. 43/165 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 803 event pairs, 18 based on Foata normal form. 1/165 useless extension candidates. Maximal degree in co-relation 255. Up to 54 conditions per place. [2021-03-11 06:29:15,848 INFO L132 encePairwiseOnDemand]: 21/30 looper letters, 13 selfloop transitions, 7 changer transitions 1/37 dead transitions. [2021-03-11 06:29:15,848 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 37 transitions, 134 flow [2021-03-11 06:29:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:29:15,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:29:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 122 transitions. [2021-03-11 06:29:15,857 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8133333333333334 [2021-03-11 06:29:15,857 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 122 transitions. [2021-03-11 06:29:15,858 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 122 transitions. [2021-03-11 06:29:15,859 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:15,860 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 122 transitions. [2021-03-11 06:29:15,862 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.4) internal successors, (122), 5 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:15,865 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:15,866 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:15,867 INFO L185 Difference]: Start difference. First operand has 35 places, 25 transitions, 68 flow. Second operand 5 states and 122 transitions. [2021-03-11 06:29:15,868 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 37 transitions, 134 flow [2021-03-11 06:29:15,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 37 transitions, 122 flow, removed 0 selfloop flow, removed 6 redundant places. [2021-03-11 06:29:15,872 INFO L241 Difference]: Finished difference. Result has 36 places, 30 transitions, 105 flow [2021-03-11 06:29:15,874 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=18, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=105, PETRI_PLACES=36, PETRI_TRANSITIONS=30} [2021-03-11 06:29:15,874 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 1 predicate places. [2021-03-11 06:29:15,874 INFO L480 AbstractCegarLoop]: Abstraction has has 36 places, 30 transitions, 105 flow [2021-03-11 06:29:15,875 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 21.5) internal successors, (129), 6 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:15,875 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:15,875 INFO L255 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] [2021-03-11 06:29:15,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-11 06:29:15,875 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:15,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1387160825, now seen corresponding path program 2 times [2021-03-11 06:29:15,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:15,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482202587] [2021-03-11 06:29:15,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:15,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:15,921 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,921 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:15,924 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,925 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:15,928 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,929 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:15,933 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,934 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:15,944 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:15,944 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:15,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482202587] [2021-03-11 06:29:15,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:15,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:15,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978115844] [2021-03-11 06:29:15,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:15,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:15,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:15,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:15,948 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:15,949 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 30 transitions, 105 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:15,949 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:15,949 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:15,949 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:16,109 INFO L129 PetriNetUnfolder]: 133/374 cut-off events. [2021-03-11 06:29:16,109 INFO L130 PetriNetUnfolder]: For 66/68 co-relation queries the response was YES. [2021-03-11 06:29:16,111 INFO L84 FinitePrefix]: Finished finitePrefix Result has 799 conditions, 374 events. 133/374 cut-off events. For 66/68 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2219 event pairs, 34 based on Foata normal form. 6/367 useless extension candidates. Maximal degree in co-relation 769. Up to 79 conditions per place. [2021-03-11 06:29:16,114 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 19 selfloop transitions, 16 changer transitions 0/52 dead transitions. [2021-03-11 06:29:16,114 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 52 transitions, 231 flow [2021-03-11 06:29:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 06:29:16,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 06:29:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2021-03-11 06:29:16,116 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8333333333333334 [2021-03-11 06:29:16,116 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 150 transitions. [2021-03-11 06:29:16,116 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 150 transitions. [2021-03-11 06:29:16,117 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:16,117 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 150 transitions. [2021-03-11 06:29:16,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.0) internal successors, (150), 6 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,119 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,120 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,120 INFO L185 Difference]: Start difference. First operand has 36 places, 30 transitions, 105 flow. Second operand 6 states and 150 transitions. [2021-03-11 06:29:16,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 52 transitions, 231 flow [2021-03-11 06:29:16,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 52 transitions, 218 flow, removed 1 selfloop flow, removed 3 redundant places. [2021-03-11 06:29:16,124 INFO L241 Difference]: Finished difference. Result has 40 places, 42 transitions, 187 flow [2021-03-11 06:29:16,124 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=187, PETRI_PLACES=40, PETRI_TRANSITIONS=42} [2021-03-11 06:29:16,125 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 5 predicate places. [2021-03-11 06:29:16,125 INFO L480 AbstractCegarLoop]: Abstraction has has 40 places, 42 transitions, 187 flow [2021-03-11 06:29:16,125 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,125 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:16,125 INFO L255 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] [2021-03-11 06:29:16,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-03-11 06:29:16,126 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:16,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:16,126 INFO L82 PathProgramCache]: Analyzing trace with hash -1761024361, now seen corresponding path program 3 times [2021-03-11 06:29:16,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:16,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605873463] [2021-03-11 06:29:16,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:16,149 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,149 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:16,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,159 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,159 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:16,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605873463] [2021-03-11 06:29:16,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:16,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 06:29:16,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139655600] [2021-03-11 06:29:16,170 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:29:16,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:16,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:29:16,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:29:16,172 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:16,172 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 42 transitions, 187 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,172 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:16,173 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:16,173 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:16,312 INFO L129 PetriNetUnfolder]: 131/404 cut-off events. [2021-03-11 06:29:16,312 INFO L130 PetriNetUnfolder]: For 316/353 co-relation queries the response was YES. [2021-03-11 06:29:16,316 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1041 conditions, 404 events. 131/404 cut-off events. For 316/353 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2438 event pairs, 32 based on Foata normal form. 26/417 useless extension candidates. Maximal degree in co-relation 997. Up to 174 conditions per place. [2021-03-11 06:29:16,319 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 28 selfloop transitions, 15 changer transitions 1/61 dead transitions. [2021-03-11 06:29:16,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 61 transitions, 370 flow [2021-03-11 06:29:16,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:29:16,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:29:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2021-03-11 06:29:16,324 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2021-03-11 06:29:16,324 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2021-03-11 06:29:16,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2021-03-11 06:29:16,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:16,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2021-03-11 06:29:16,327 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,329 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,329 INFO L185 Difference]: Start difference. First operand has 40 places, 42 transitions, 187 flow. Second operand 5 states and 124 transitions. [2021-03-11 06:29:16,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 61 transitions, 370 flow [2021-03-11 06:29:16,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 61 transitions, 354 flow, removed 6 selfloop flow, removed 1 redundant places. [2021-03-11 06:29:16,338 INFO L241 Difference]: Finished difference. Result has 45 places, 51 transitions, 285 flow [2021-03-11 06:29:16,338 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=177, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=285, PETRI_PLACES=45, PETRI_TRANSITIONS=51} [2021-03-11 06:29:16,338 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 10 predicate places. [2021-03-11 06:29:16,339 INFO L480 AbstractCegarLoop]: Abstraction has has 45 places, 51 transitions, 285 flow [2021-03-11 06:29:16,339 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,339 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:16,341 INFO L255 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] [2021-03-11 06:29:16,341 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-11 06:29:16,341 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:16,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:16,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1208342017, now seen corresponding path program 4 times [2021-03-11 06:29:16,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:16,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586929739] [2021-03-11 06:29:16,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:16,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:16,387 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,388 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:16,392 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,392 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,397 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,402 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,403 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:16,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:16,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586929739] [2021-03-11 06:29:16,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:16,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-11 06:29:16,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212568510] [2021-03-11 06:29:16,404 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-11 06:29:16,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:16,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-11 06:29:16,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-11 06:29:16,409 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:16,409 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 51 transitions, 285 flow. Second operand has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,409 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:16,409 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:16,410 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:16,519 INFO L129 PetriNetUnfolder]: 101/362 cut-off events. [2021-03-11 06:29:16,520 INFO L130 PetriNetUnfolder]: For 488/527 co-relation queries the response was YES. [2021-03-11 06:29:16,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1051 conditions, 362 events. 101/362 cut-off events. For 488/527 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2232 event pairs, 24 based on Foata normal form. 45/400 useless extension candidates. Maximal degree in co-relation 1005. Up to 154 conditions per place. [2021-03-11 06:29:16,523 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 28 selfloop transitions, 16 changer transitions 2/63 dead transitions. [2021-03-11 06:29:16,523 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 63 transitions, 441 flow [2021-03-11 06:29:16,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-11 06:29:16,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2021-03-11 06:29:16,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2021-03-11 06:29:16,527 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8266666666666667 [2021-03-11 06:29:16,527 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 124 transitions. [2021-03-11 06:29:16,528 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 124 transitions. [2021-03-11 06:29:16,528 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:16,528 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 124 transitions. [2021-03-11 06:29:16,528 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,529 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,530 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 30.0) internal successors, (180), 6 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,530 INFO L185 Difference]: Start difference. First operand has 45 places, 51 transitions, 285 flow. Second operand 5 states and 124 transitions. [2021-03-11 06:29:16,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 63 transitions, 441 flow [2021-03-11 06:29:16,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 63 transitions, 437 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-03-11 06:29:16,534 INFO L241 Difference]: Finished difference. Result has 50 places, 53 transitions, 347 flow [2021-03-11 06:29:16,534 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=281, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=347, PETRI_PLACES=50, PETRI_TRANSITIONS=53} [2021-03-11 06:29:16,535 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2021-03-11 06:29:16,535 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 53 transitions, 347 flow [2021-03-11 06:29:16,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 21.0) internal successors, (105), 5 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,535 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:16,535 INFO L255 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] [2021-03-11 06:29:16,535 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-11 06:29:16,536 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:16,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:16,539 INFO L82 PathProgramCache]: Analyzing trace with hash 427209061, now seen corresponding path program 5 times [2021-03-11 06:29:16,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:16,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836274773] [2021-03-11 06:29:16,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:16,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:16,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:16,595 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,596 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,599 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,600 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,605 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,605 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,611 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,611 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:16,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836274773] [2021-03-11 06:29:16,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:16,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:16,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150818593] [2021-03-11 06:29:16,613 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:16,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:16,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:16,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:16,613 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:16,614 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 53 transitions, 347 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,614 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:16,614 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:16,614 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:16,715 INFO L129 PetriNetUnfolder]: 95/333 cut-off events. [2021-03-11 06:29:16,715 INFO L130 PetriNetUnfolder]: For 560/605 co-relation queries the response was YES. [2021-03-11 06:29:16,717 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1050 conditions, 333 events. 95/333 cut-off events. For 560/605 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1993 event pairs, 14 based on Foata normal form. 29/352 useless extension candidates. Maximal degree in co-relation 1002. Up to 72 conditions per place. [2021-03-11 06:29:16,718 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 19 selfloop transitions, 27 changer transitions 0/63 dead transitions. [2021-03-11 06:29:16,718 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 63 transitions, 490 flow [2021-03-11 06:29:16,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 06:29:16,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 06:29:16,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2021-03-11 06:29:16,719 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8277777777777777 [2021-03-11 06:29:16,719 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 149 transitions. [2021-03-11 06:29:16,719 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 149 transitions. [2021-03-11 06:29:16,720 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:16,720 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 149 transitions. [2021-03-11 06:29:16,721 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,721 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,722 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,722 INFO L185 Difference]: Start difference. First operand has 50 places, 53 transitions, 347 flow. Second operand 6 states and 149 transitions. [2021-03-11 06:29:16,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 63 transitions, 490 flow [2021-03-11 06:29:16,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 63 transitions, 463 flow, removed 4 selfloop flow, removed 3 redundant places. [2021-03-11 06:29:16,727 INFO L241 Difference]: Finished difference. Result has 54 places, 55 transitions, 421 flow [2021-03-11 06:29:16,727 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=421, PETRI_PLACES=54, PETRI_TRANSITIONS=55} [2021-03-11 06:29:16,727 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 19 predicate places. [2021-03-11 06:29:16,728 INFO L480 AbstractCegarLoop]: Abstraction has has 54 places, 55 transitions, 421 flow [2021-03-11 06:29:16,728 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,728 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:16,728 INFO L255 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] [2021-03-11 06:29:16,728 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-11 06:29:16,728 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:16,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:16,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1196201367, now seen corresponding path program 6 times [2021-03-11 06:29:16,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:16,729 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692247640] [2021-03-11 06:29:16,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:16,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:16,770 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,770 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:16,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,781 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,781 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,791 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,792 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,798 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,799 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:16,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:16,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692247640] [2021-03-11 06:29:16,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:16,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:16,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929016481] [2021-03-11 06:29:16,800 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:16,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:16,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:16,800 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:16,801 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:16,801 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 55 transitions, 421 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,801 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:16,801 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:16,801 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:16,884 INFO L129 PetriNetUnfolder]: 53/209 cut-off events. [2021-03-11 06:29:16,884 INFO L130 PetriNetUnfolder]: For 519/555 co-relation queries the response was YES. [2021-03-11 06:29:16,885 INFO L84 FinitePrefix]: Finished finitePrefix Result has 750 conditions, 209 events. 53/209 cut-off events. For 519/555 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1039 event pairs, 10 based on Foata normal form. 36/243 useless extension candidates. Maximal degree in co-relation 715. Up to 55 conditions per place. [2021-03-11 06:29:16,886 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 19 selfloop transitions, 23 changer transitions 4/63 dead transitions. [2021-03-11 06:29:16,886 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 63 transitions, 539 flow [2021-03-11 06:29:16,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 06:29:16,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 06:29:16,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2021-03-11 06:29:16,887 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8277777777777777 [2021-03-11 06:29:16,887 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 149 transitions. [2021-03-11 06:29:16,887 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 149 transitions. [2021-03-11 06:29:16,887 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:16,887 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 149 transitions. [2021-03-11 06:29:16,888 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 24.833333333333332) internal successors, (149), 6 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,888 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,889 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,889 INFO L185 Difference]: Start difference. First operand has 54 places, 55 transitions, 421 flow. Second operand 6 states and 149 transitions. [2021-03-11 06:29:16,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 63 transitions, 539 flow [2021-03-11 06:29:16,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 63 transitions, 503 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-03-11 06:29:16,893 INFO L241 Difference]: Finished difference. Result has 56 places, 51 transitions, 393 flow [2021-03-11 06:29:16,893 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=349, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=56, PETRI_TRANSITIONS=51} [2021-03-11 06:29:16,893 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 21 predicate places. [2021-03-11 06:29:16,893 INFO L480 AbstractCegarLoop]: Abstraction has has 56 places, 51 transitions, 393 flow [2021-03-11 06:29:16,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,893 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:16,894 INFO L255 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] [2021-03-11 06:29:16,894 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-03-11 06:29:16,894 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:16,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:16,894 INFO L82 PathProgramCache]: Analyzing trace with hash -170712483, now seen corresponding path program 7 times [2021-03-11 06:29:16,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:16,894 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830359833] [2021-03-11 06:29:16,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:16,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:16,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:16,926 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,931 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,937 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,942 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,949 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,949 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:16,955 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:16,955 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:16,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:16,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830359833] [2021-03-11 06:29:16,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:16,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 06:29:16,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739139791] [2021-03-11 06:29:16,956 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 06:29:16,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:16,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 06:29:16,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 06:29:16,957 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:16,957 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 51 transitions, 393 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:16,957 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:16,957 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:16,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:17,065 INFO L129 PetriNetUnfolder]: 41/176 cut-off events. [2021-03-11 06:29:17,065 INFO L130 PetriNetUnfolder]: For 490/514 co-relation queries the response was YES. [2021-03-11 06:29:17,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 663 conditions, 176 events. 41/176 cut-off events. For 490/514 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 814 event pairs, 11 based on Foata normal form. 20/194 useless extension candidates. Maximal degree in co-relation 312. Up to 52 conditions per place. [2021-03-11 06:29:17,067 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 19 selfloop transitions, 18 changer transitions 7/61 dead transitions. [2021-03-11 06:29:17,067 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 61 transitions, 531 flow [2021-03-11 06:29:17,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 06:29:17,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-11 06:29:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2021-03-11 06:29:17,068 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7958333333333333 [2021-03-11 06:29:17,068 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 191 transitions. [2021-03-11 06:29:17,068 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 191 transitions. [2021-03-11 06:29:17,068 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:17,069 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 191 transitions. [2021-03-11 06:29:17,069 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 23.875) internal successors, (191), 8 states have internal predecessors, (191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,070 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,070 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,070 INFO L185 Difference]: Start difference. First operand has 56 places, 51 transitions, 393 flow. Second operand 8 states and 191 transitions. [2021-03-11 06:29:17,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 61 transitions, 531 flow [2021-03-11 06:29:17,072 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 61 transitions, 480 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-03-11 06:29:17,074 INFO L241 Difference]: Finished difference. Result has 61 places, 46 transitions, 338 flow [2021-03-11 06:29:17,074 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=344, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=61, PETRI_TRANSITIONS=46} [2021-03-11 06:29:17,074 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 26 predicate places. [2021-03-11 06:29:17,074 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 46 transitions, 338 flow [2021-03-11 06:29:17,074 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,075 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:17,075 INFO L255 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] [2021-03-11 06:29:17,075 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-03-11 06:29:17,075 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:17,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:17,075 INFO L82 PathProgramCache]: Analyzing trace with hash -1803552831, now seen corresponding path program 8 times [2021-03-11 06:29:17,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:17,076 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666899287] [2021-03-11 06:29:17,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:17,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:17,106 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:17,109 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,109 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,113 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,118 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,122 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,128 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:17,129 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666899287] [2021-03-11 06:29:17,129 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:17,129 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 06:29:17,129 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93818220] [2021-03-11 06:29:17,129 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 06:29:17,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:17,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 06:29:17,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 06:29:17,130 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:17,130 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 46 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,131 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:17,131 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:17,131 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:17,240 INFO L129 PetriNetUnfolder]: 35/156 cut-off events. [2021-03-11 06:29:17,240 INFO L130 PetriNetUnfolder]: For 454/470 co-relation queries the response was YES. [2021-03-11 06:29:17,240 INFO L84 FinitePrefix]: Finished finitePrefix Result has 582 conditions, 156 events. 35/156 cut-off events. For 454/470 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 692 event pairs, 11 based on Foata normal form. 11/165 useless extension candidates. Maximal degree in co-relation 292. Up to 50 conditions per place. [2021-03-11 06:29:17,241 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 16 selfloop transitions, 13 changer transitions 13/59 dead transitions. [2021-03-11 06:29:17,241 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 59 transitions, 499 flow [2021-03-11 06:29:17,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-11 06:29:17,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-03-11 06:29:17,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2021-03-11 06:29:17,242 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-03-11 06:29:17,242 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 192 transitions. [2021-03-11 06:29:17,242 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 192 transitions. [2021-03-11 06:29:17,242 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:17,242 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 192 transitions. [2021-03-11 06:29:17,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 24.0) internal successors, (192), 8 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,243 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,244 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 30.0) internal successors, (270), 9 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,244 INFO L185 Difference]: Start difference. First operand has 61 places, 46 transitions, 338 flow. Second operand 8 states and 192 transitions. [2021-03-11 06:29:17,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 59 transitions, 499 flow [2021-03-11 06:29:17,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 59 transitions, 441 flow, removed 13 selfloop flow, removed 6 redundant places. [2021-03-11 06:29:17,247 INFO L241 Difference]: Finished difference. Result has 61 places, 40 transitions, 263 flow [2021-03-11 06:29:17,247 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=263, PETRI_PLACES=61, PETRI_TRANSITIONS=40} [2021-03-11 06:29:17,247 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 26 predicate places. [2021-03-11 06:29:17,247 INFO L480 AbstractCegarLoop]: Abstraction has has 61 places, 40 transitions, 263 flow [2021-03-11 06:29:17,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,247 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:17,247 INFO L255 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] [2021-03-11 06:29:17,247 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-03-11 06:29:17,247 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:17,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:17,248 INFO L82 PathProgramCache]: Analyzing trace with hash -2140957491, now seen corresponding path program 9 times [2021-03-11 06:29:17,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:17,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013200903] [2021-03-11 06:29:17,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:17,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:17,259 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,259 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:17,262 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,262 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:17,269 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,269 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,270 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,270 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,274 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,275 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:17,275 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:17,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013200903] [2021-03-11 06:29:17,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:17,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:17,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669109369] [2021-03-11 06:29:17,276 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:17,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:17,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:17,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:17,277 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:17,277 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 40 transitions, 263 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,277 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:17,277 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:17,277 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:17,329 INFO L129 PetriNetUnfolder]: 27/150 cut-off events. [2021-03-11 06:29:17,329 INFO L130 PetriNetUnfolder]: For 390/400 co-relation queries the response was YES. [2021-03-11 06:29:17,329 INFO L84 FinitePrefix]: Finished finitePrefix Result has 506 conditions, 150 events. 27/150 cut-off events. For 390/400 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 681 event pairs, 6 based on Foata normal form. 11/159 useless extension candidates. Maximal degree in co-relation 290. Up to 32 conditions per place. [2021-03-11 06:29:17,330 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 11 selfloop transitions, 20 changer transitions 7/55 dead transitions. [2021-03-11 06:29:17,330 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 55 transitions, 413 flow [2021-03-11 06:29:17,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 06:29:17,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 06:29:17,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2021-03-11 06:29:17,331 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7944444444444444 [2021-03-11 06:29:17,331 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 143 transitions. [2021-03-11 06:29:17,331 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 143 transitions. [2021-03-11 06:29:17,331 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:17,331 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 143 transitions. [2021-03-11 06:29:17,332 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.833333333333332) internal successors, (143), 6 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,332 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,332 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,332 INFO L185 Difference]: Start difference. First operand has 61 places, 40 transitions, 263 flow. Second operand 6 states and 143 transitions. [2021-03-11 06:29:17,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 55 transitions, 413 flow [2021-03-11 06:29:17,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 55 transitions, 338 flow, removed 9 selfloop flow, removed 13 redundant places. [2021-03-11 06:29:17,335 INFO L241 Difference]: Finished difference. Result has 51 places, 45 transitions, 285 flow [2021-03-11 06:29:17,335 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=285, PETRI_PLACES=51, PETRI_TRANSITIONS=45} [2021-03-11 06:29:17,335 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 16 predicate places. [2021-03-11 06:29:17,335 INFO L480 AbstractCegarLoop]: Abstraction has has 51 places, 45 transitions, 285 flow [2021-03-11 06:29:17,335 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,335 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:17,335 INFO L255 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] [2021-03-11 06:29:17,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-03-11 06:29:17,336 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:17,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:17,336 INFO L82 PathProgramCache]: Analyzing trace with hash -1571554013, now seen corresponding path program 10 times [2021-03-11 06:29:17,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:17,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568359538] [2021-03-11 06:29:17,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:17,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:17,346 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:17,349 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,349 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:17,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,362 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:17,363 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:17,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568359538] [2021-03-11 06:29:17,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:17,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:17,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722395777] [2021-03-11 06:29:17,363 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:17,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:17,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:17,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:17,364 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:17,364 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 45 transitions, 285 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,364 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:17,364 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:17,364 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:17,426 INFO L129 PetriNetUnfolder]: 17/115 cut-off events. [2021-03-11 06:29:17,427 INFO L130 PetriNetUnfolder]: For 297/309 co-relation queries the response was YES. [2021-03-11 06:29:17,427 INFO L84 FinitePrefix]: Finished finitePrefix Result has 391 conditions, 115 events. 17/115 cut-off events. For 297/309 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 437 event pairs, 7 based on Foata normal form. 10/124 useless extension candidates. Maximal degree in co-relation 218. Up to 29 conditions per place. [2021-03-11 06:29:17,428 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 10 selfloop transitions, 15 changer transitions 5/46 dead transitions. [2021-03-11 06:29:17,428 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 46 transitions, 349 flow [2021-03-11 06:29:17,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 06:29:17,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 06:29:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2021-03-11 06:29:17,432 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7611111111111111 [2021-03-11 06:29:17,432 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 137 transitions. [2021-03-11 06:29:17,432 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 137 transitions. [2021-03-11 06:29:17,433 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:17,433 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 137 transitions. [2021-03-11 06:29:17,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,434 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,434 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,434 INFO L185 Difference]: Start difference. First operand has 51 places, 45 transitions, 285 flow. Second operand 6 states and 137 transitions. [2021-03-11 06:29:17,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 46 transitions, 349 flow [2021-03-11 06:29:17,435 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 46 transitions, 314 flow, removed 10 selfloop flow, removed 4 redundant places. [2021-03-11 06:29:17,436 INFO L241 Difference]: Finished difference. Result has 53 places, 39 transitions, 241 flow [2021-03-11 06:29:17,436 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2021-03-11 06:29:17,436 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 18 predicate places. [2021-03-11 06:29:17,436 INFO L480 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 241 flow [2021-03-11 06:29:17,437 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,437 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:17,437 INFO L255 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] [2021-03-11 06:29:17,437 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-11 06:29:17,437 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:17,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:17,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1012373023, now seen corresponding path program 11 times [2021-03-11 06:29:17,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:17,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64217091] [2021-03-11 06:29:17,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:17,462 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,463 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:17,466 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,474 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,487 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,506 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,506 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,508 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,508 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,514 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:17,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64217091] [2021-03-11 06:29:17,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:17,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:17,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854373408] [2021-03-11 06:29:17,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:17,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:17,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:17,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:17,520 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:17,520 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,520 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:17,520 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:17,520 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:17,574 INFO L129 PetriNetUnfolder]: 11/79 cut-off events. [2021-03-11 06:29:17,574 INFO L130 PetriNetUnfolder]: For 169/179 co-relation queries the response was YES. [2021-03-11 06:29:17,575 INFO L84 FinitePrefix]: Finished finitePrefix Result has 261 conditions, 79 events. 11/79 cut-off events. For 169/179 co-relation queries the response was YES. Maximal size of possible extension queue 8. Compared 232 event pairs, 4 based on Foata normal form. 8/87 useless extension candidates. Maximal degree in co-relation 215. Up to 24 conditions per place. [2021-03-11 06:29:17,575 INFO L132 encePairwiseOnDemand]: 22/30 looper letters, 15 selfloop transitions, 8 changer transitions 3/42 dead transitions. [2021-03-11 06:29:17,575 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 42 transitions, 291 flow [2021-03-11 06:29:17,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 06:29:17,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 06:29:17,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2021-03-11 06:29:17,576 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7611111111111111 [2021-03-11 06:29:17,576 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 137 transitions. [2021-03-11 06:29:17,576 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 137 transitions. [2021-03-11 06:29:17,576 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:17,576 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 137 transitions. [2021-03-11 06:29:17,577 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 22.833333333333332) internal successors, (137), 6 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,577 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,577 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,577 INFO L185 Difference]: Start difference. First operand has 53 places, 39 transitions, 241 flow. Second operand 6 states and 137 transitions. [2021-03-11 06:29:17,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 42 transitions, 291 flow [2021-03-11 06:29:17,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 42 transitions, 249 flow, removed 4 selfloop flow, removed 8 redundant places. [2021-03-11 06:29:17,579 INFO L241 Difference]: Finished difference. Result has 50 places, 35 transitions, 182 flow [2021-03-11 06:29:17,579 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=181, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=182, PETRI_PLACES=50, PETRI_TRANSITIONS=35} [2021-03-11 06:29:17,579 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 15 predicate places. [2021-03-11 06:29:17,580 INFO L480 AbstractCegarLoop]: Abstraction has has 50 places, 35 transitions, 182 flow [2021-03-11 06:29:17,580 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,580 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:17,580 INFO L255 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] [2021-03-11 06:29:17,580 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-11 06:29:17,580 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:17,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:17,580 INFO L82 PathProgramCache]: Analyzing trace with hash -1914159741, now seen corresponding path program 12 times [2021-03-11 06:29:17,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:17,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029921537] [2021-03-11 06:29:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:17,592 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:17,595 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,595 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,599 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,603 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,604 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,609 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,609 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:17,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:17,621 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029921537] [2021-03-11 06:29:17,621 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:17,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-03-11 06:29:17,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518650041] [2021-03-11 06:29:17,622 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-11 06:29:17,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:17,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-11 06:29:17,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-11 06:29:17,623 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:17,623 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 35 transitions, 182 flow. Second operand has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,623 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:17,623 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:17,623 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:17,680 INFO L129 PetriNetUnfolder]: 6/51 cut-off events. [2021-03-11 06:29:17,680 INFO L130 PetriNetUnfolder]: For 87/92 co-relation queries the response was YES. [2021-03-11 06:29:17,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 155 conditions, 51 events. 6/51 cut-off events. For 87/92 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 80 event pairs, 3 based on Foata normal form. 3/54 useless extension candidates. Maximal degree in co-relation 90. Up to 17 conditions per place. [2021-03-11 06:29:17,681 INFO L132 encePairwiseOnDemand]: 24/30 looper letters, 9 selfloop transitions, 3 changer transitions 6/34 dead transitions. [2021-03-11 06:29:17,681 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 34 transitions, 198 flow [2021-03-11 06:29:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-11 06:29:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-03-11 06:29:17,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2021-03-11 06:29:17,682 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7142857142857143 [2021-03-11 06:29:17,682 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 150 transitions. [2021-03-11 06:29:17,682 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 150 transitions. [2021-03-11 06:29:17,682 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:17,682 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 150 transitions. [2021-03-11 06:29:17,683 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 21.428571428571427) internal successors, (150), 7 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,683 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,684 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 30.0) internal successors, (240), 8 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,684 INFO L185 Difference]: Start difference. First operand has 50 places, 35 transitions, 182 flow. Second operand 7 states and 150 transitions. [2021-03-11 06:29:17,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 34 transitions, 198 flow [2021-03-11 06:29:17,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 34 transitions, 177 flow, removed 1 selfloop flow, removed 8 redundant places. [2021-03-11 06:29:17,685 INFO L241 Difference]: Finished difference. Result has 48 places, 28 transitions, 119 flow [2021-03-11 06:29:17,685 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=133, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=119, PETRI_PLACES=48, PETRI_TRANSITIONS=28} [2021-03-11 06:29:17,685 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, 13 predicate places. [2021-03-11 06:29:17,686 INFO L480 AbstractCegarLoop]: Abstraction has has 48 places, 28 transitions, 119 flow [2021-03-11 06:29:17,686 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 20.428571428571427) internal successors, (143), 7 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,686 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-03-11 06:29:17,686 INFO L255 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] [2021-03-11 06:29:17,686 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-11 06:29:17,686 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-11 06:29:17,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-11 06:29:17,686 INFO L82 PathProgramCache]: Analyzing trace with hash 1482608173, now seen corresponding path program 13 times [2021-03-11 06:29:17,686 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-11 06:29:17,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963526482] [2021-03-11 06:29:17,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-11 06:29:17,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-11 06:29:17,697 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-03-11 06:29:17,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,704 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-03-11 06:29:17,708 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,709 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,709 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-03-11 06:29:17,719 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-03-11 06:29:17,719 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-03-11 06:29:17,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-11 06:29:17,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963526482] [2021-03-11 06:29:17,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-11 06:29:17,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-11 06:29:17,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573276481] [2021-03-11 06:29:17,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-11 06:29:17,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-11 06:29:17,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-11 06:29:17,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-03-11 06:29:17,722 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 30 [2021-03-11 06:29:17,722 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 28 transitions, 119 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,722 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-03-11 06:29:17,722 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 30 [2021-03-11 06:29:17,723 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-03-11 06:29:17,743 INFO L129 PetriNetUnfolder]: 1/15 cut-off events. [2021-03-11 06:29:17,743 INFO L130 PetriNetUnfolder]: For 25/25 co-relation queries the response was YES. [2021-03-11 06:29:17,743 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 15 events. 1/15 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 8 event pairs, 0 based on Foata normal form. 2/17 useless extension candidates. Maximal degree in co-relation 45. Up to 4 conditions per place. [2021-03-11 06:29:17,744 INFO L132 encePairwiseOnDemand]: 24/30 looper letters, 0 selfloop transitions, 0 changer transitions 14/14 dead transitions. [2021-03-11 06:29:17,744 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 14 transitions, 79 flow [2021-03-11 06:29:17,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-11 06:29:17,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-03-11 06:29:17,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2021-03-11 06:29:17,744 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.6833333333333333 [2021-03-11 06:29:17,745 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 123 transitions. [2021-03-11 06:29:17,745 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 123 transitions. [2021-03-11 06:29:17,745 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-03-11 06:29:17,745 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 123 transitions. [2021-03-11 06:29:17,745 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 20.5) internal successors, (123), 6 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,745 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,746 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 30.0) internal successors, (210), 7 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,746 INFO L185 Difference]: Start difference. First operand has 48 places, 28 transitions, 119 flow. Second operand 6 states and 123 transitions. [2021-03-11 06:29:17,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 14 transitions, 79 flow [2021-03-11 06:29:17,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 26 places, 14 transitions, 55 flow, removed 3 selfloop flow, removed 10 redundant places. [2021-03-11 06:29:17,747 INFO L241 Difference]: Finished difference. Result has 26 places, 0 transitions, 0 flow [2021-03-11 06:29:17,747 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=30, PETRI_DIFFERENCE_MINUEND_FLOW=37, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=13, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=0, PETRI_PLACES=26, PETRI_TRANSITIONS=0} [2021-03-11 06:29:17,747 INFO L335 CegarLoopForPetriNet]: 35 programPoint places, -9 predicate places. [2021-03-11 06:29:17,747 INFO L480 AbstractCegarLoop]: Abstraction has has 26 places, 0 transitions, 0 flow [2021-03-11 06:29:17,747 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-11 06:29:17,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-03-11 06:29:17,751 INFO L202 PluginConnector]: Adding new model ticket-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.03 06:29:17 BasicIcfg [2021-03-11 06:29:17,751 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-11 06:29:17,752 INFO L168 Benchmark]: Toolchain (without parser) took 2680.59 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 236.7 MB in the beginning and 289.3 MB in the end (delta: -52.6 MB). Peak memory consumption was 44.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:17,754 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-03-11 06:29:17,755 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.63 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:17,755 INFO L168 Benchmark]: Boogie Preprocessor took 13.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 799.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:17,756 INFO L168 Benchmark]: RCFGBuilder took 299.35 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 237.7 MB in the end (delta: -3.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:17,757 INFO L168 Benchmark]: TraceAbstraction took 2339.05 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 237.7 MB in the beginning and 289.3 MB in the end (delta: -51.6 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.0 GB. [2021-03-11 06:29:17,759 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.8 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 21.63 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.47 ms. Allocated memory is still 255.9 MB. Free memory was 234.6 MB in the beginning and 233.8 MB in the end (delta: 799.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 299.35 ms. Allocated memory is still 255.9 MB. Free memory was 233.8 MB in the beginning and 237.7 MB in the end (delta: -3.9 MB). Peak memory consumption was 19.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 2339.05 ms. Allocated memory was 255.9 MB in the beginning and 354.4 MB in the end (delta: 98.6 MB). Free memory was 237.7 MB in the beginning and 289.3 MB in the end (delta: -51.6 MB). Peak memory consumption was 43.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 65]: assertion always holds For all program executions holds that assertion always holds at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 31 locations, 1 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 9.1ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 2224.1ms, OverallIterations: 13, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 1297.3ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 31.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 22 SDtfs, 87 SDslu, 5 SDs, 0 SdLazy, 808 SolverSat, 118 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 466.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 89 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 386.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=421occurred in iteration=5, InterpolantAutomatonStates: 80, 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: 21.2ms SsaConstructionTime, 116.3ms SatisfiabilityAnalysisTime, 594.1ms InterpolantComputationTime, 325 NumberOfCodeBlocks, 325 NumberOfCodeBlocksAsserted, 13 NumberOfCheckSat, 312 ConstructedInterpolants, 0 QuantifiedInterpolants, 770 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 13 InterpolantComputations, 13 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 correct! Received shutdown request...