/usr/bin/java -Xmx8000000000 -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-OGIterative-CovSimpl.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 08:16:27,710 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 08:16:27,712 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 08:16:27,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 08:16:27,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-13 08:16:27,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-13 08:16:27,760 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-13 08:16:27,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-13 08:16:27,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-13 08:16:27,766 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-13 08:16:27,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-13 08:16:27,771 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-13 08:16:27,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-13 08:16:27,773 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-13 08:16:27,774 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-13 08:16:27,775 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-13 08:16:27,780 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-13 08:16:27,787 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-13 08:16:27,787 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-13 08:16:27,788 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-13 08:16:27,789 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-OGIterative-CovSimpl.epf [2021-08-13 08:16:27,815 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 08:16:27,815 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 08:16:27,818 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 08:16:27,818 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 08:16:27,818 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 08:16:27,818 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 08:16:27,819 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 08:16:27,819 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 08:16:27,819 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 08:16:27,819 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 08:16:27,820 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 08:16:27,820 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 08:16:27,820 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 08:16:27,820 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 08:16:27,820 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 08:16:27,820 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 08:16:27,820 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 08:16:27,820 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 08:16:27,820 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 08:16:27,821 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 08:16:27,821 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 08:16:27,821 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 08:16:27,821 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 08:16:27,821 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 08:16:27,821 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 08:16:27,821 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 08:16:27,822 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 08:16:27,822 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 08:16:27,822 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 08:16:27,822 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 08:16:27,822 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 08:16:27,822 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2021-08-13 08:16:27,822 INFO L138 SettingsManager]: * Simplify away covered predicates in OwickiGries annotation=true 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 08:16:28,086 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 08:16:28,108 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 08:16:28,110 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 08:16:28,110 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 08:16:28,111 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 08:16:28,112 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl [2021-08-13 08:16:28,145 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/bakery-2.wvr.bpl' [2021-08-13 08:16:28,225 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 08:16:28,242 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 08:16:28,243 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 08:16:28,243 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 08:16:28,243 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 08:16:28,252 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,258 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 08:16:28,265 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 08:16:28,265 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 08:16:28,266 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 08:16:28,271 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,272 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,273 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,274 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,277 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,279 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,279 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/1) ... [2021-08-13 08:16:28,283 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 08:16:28,284 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 08:16:28,284 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 08:16:28,285 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 08:16:28,286 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (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 [2021-08-13 08:16:28,374 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-13 08:16:28,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-13 08:16:28,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-13 08:16:28,375 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-13 08:16:28,375 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-13 08:16:28,375 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-13 08:16:28,375 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 08:16:28,375 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 08:16:28,376 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 08:16:28,376 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 08:16:28,570 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 08:16:28,571 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-13 08:16:28,571 INFO L202 PluginConnector]: Adding new model bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 08:16:28 BoogieIcfgContainer [2021-08-13 08:16:28,572 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 08:16:28,589 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 08:16:28,589 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 08:16:28,591 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 08:16:28,597 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 08:16:28" (1/2) ... [2021-08-13 08:16:28,598 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2d22ba04 and model type bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 08:16:28, skipping insertion in model container [2021-08-13 08:16:28,598 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "bakery-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 08:16:28" (2/2) ... [2021-08-13 08:16:28,599 INFO L111 eAbstractionObserver]: Analyzing ICFG bakery-2.wvr.bpl [2021-08-13 08:16:28,615 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 08:16:28,616 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 08:16:28,616 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 08:16:28,639 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-13 08:16:28,660 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-13 08:16:28,674 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 08:16:28,674 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 08:16:28,674 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 08:16:28,674 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 08:16:28,675 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 08:16:28,675 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 08:16:28,675 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 08:16:28,675 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 08:16:28,681 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 38 places, 31 transitions, 78 flow [2021-08-13 08:16:28,700 INFO L129 PetriNetUnfolder]: 0/29 cut-off events. [2021-08-13 08:16:28,701 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 08:16:28,702 INFO L84 FinitePrefix]: Finished finitePrefix Result has 38 conditions, 29 events. 0/29 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 2. Compared 22 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 08:16:28,702 INFO L82 GeneralOperation]: Start removeDead. Operand has 38 places, 31 transitions, 78 flow [2021-08-13 08:16:28,705 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 27 transitions, 66 flow [2021-08-13 08:16:28,716 INFO L129 PetriNetUnfolder]: 0/26 cut-off events. [2021-08-13 08:16:28,716 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 08:16:28,716 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 08:16:28,717 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 08:16:28,717 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 08:16:28,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 08:16:28,721 INFO L82 PathProgramCache]: Analyzing trace with hash 1562918420, now seen corresponding path program 1 times [2021-08-13 08:16:28,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 08:16:28,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336173285] [2021-08-13 08:16:28,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 08:16:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 08:16:28,846 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:28,847 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:28,858 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:28,858 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:28,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:28,867 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:28,876 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:28,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:28,890 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-08-13 08:16:28,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:28,901 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:28,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:28,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 08:16:28,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 08:16:28,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336173285] [2021-08-13 08:16:28,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336173285] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 08:16:28,904 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 08:16:28,904 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 08:16:28,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965029313] [2021-08-13 08:16:28,910 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 08:16:28,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 08:16:28,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 08:16:28,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 08:16:28,923 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 31 [2021-08-13 08:16:28,925 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 66 flow. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-08-13 08:16:28,925 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 08:16:28,926 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 31 [2021-08-13 08:16:28,926 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 08:16:29,031 INFO L129 PetriNetUnfolder]: 1/59 cut-off events. [2021-08-13 08:16:29,032 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-08-13 08:16:29,033 INFO L84 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 59 events. 1/59 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 163 event pairs, 0 based on Foata normal form. 1/59 useless extension candidates. Maximal degree in co-relation 64. Up to 5 conditions per place. [2021-08-13 08:16:29,034 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 7 selfloop transitions, 7 changer transitions 2/37 dead transitions. [2021-08-13 08:16:29,034 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 37 transitions, 118 flow [2021-08-13 08:16:29,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 08:16:29,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 08:16:29,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 209 transitions. [2021-08-13 08:16:29,042 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.842741935483871 [2021-08-13 08:16:29,042 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 209 transitions. [2021-08-13 08:16:29,042 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 209 transitions. [2021-08-13 08:16:29,043 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 08:16:29,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 209 transitions. [2021-08-13 08:16:29,047 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 26.125) internal successors, (209), 8 states have internal predecessors, (209), 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) [2021-08-13 08:16:29,050 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 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) [2021-08-13 08:16:29,050 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 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) [2021-08-13 08:16:29,051 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 7 predicate places. [2021-08-13 08:16:29,051 INFO L482 AbstractCegarLoop]: Abstraction has has 41 places, 37 transitions, 118 flow [2021-08-13 08:16:29,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-08-13 08:16:29,051 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 08:16:29,051 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 08:16:29,051 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 08:16:29,052 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 08:16:29,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 08:16:29,052 INFO L82 PathProgramCache]: Analyzing trace with hash -965493228, now seen corresponding path program 2 times [2021-08-13 08:16:29,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 08:16:29,052 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486195024] [2021-08-13 08:16:29,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 08:16:29,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 08:16:29,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,082 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,092 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,098 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,099 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,106 INFO L142 QuantifierPusher]: treesize reduction 9, result has 43.8 percent of original size [2021-08-13 08:16:29,107 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,114 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,115 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 08:16:29,116 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 08:16:29,116 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486195024] [2021-08-13 08:16:29,116 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486195024] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 08:16:29,116 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 08:16:29,116 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 08:16:29,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142418283] [2021-08-13 08:16:29,117 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 08:16:29,118 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 08:16:29,118 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 08:16:29,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-08-13 08:16:29,120 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 31 [2021-08-13 08:16:29,120 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 118 flow. Second operand has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-08-13 08:16:29,120 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 08:16:29,120 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 31 [2021-08-13 08:16:29,120 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 08:16:29,189 INFO L129 PetriNetUnfolder]: 1/57 cut-off events. [2021-08-13 08:16:29,190 INFO L130 PetriNetUnfolder]: For 14/16 co-relation queries the response was YES. [2021-08-13 08:16:29,190 INFO L84 FinitePrefix]: Finished finitePrefix Result has 108 conditions, 57 events. 1/57 cut-off events. For 14/16 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 151 event pairs, 0 based on Foata normal form. 1/58 useless extension candidates. Maximal degree in co-relation 78. Up to 5 conditions per place. [2021-08-13 08:16:29,190 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 4 selfloop transitions, 7 changer transitions 6/38 dead transitions. [2021-08-13 08:16:29,190 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 38 transitions, 156 flow [2021-08-13 08:16:29,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 08:16:29,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 08:16:29,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 208 transitions. [2021-08-13 08:16:29,192 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8387096774193549 [2021-08-13 08:16:29,192 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 208 transitions. [2021-08-13 08:16:29,192 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 208 transitions. [2021-08-13 08:16:29,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 08:16:29,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 208 transitions. [2021-08-13 08:16:29,194 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 26.0) internal successors, (208), 8 states have internal predecessors, (208), 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) [2021-08-13 08:16:29,195 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 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) [2021-08-13 08:16:29,195 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 31.0) internal successors, (279), 9 states have internal predecessors, (279), 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) [2021-08-13 08:16:29,195 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2021-08-13 08:16:29,195 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 156 flow [2021-08-13 08:16:29,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 24.857142857142858) internal successors, (174), 7 states have internal predecessors, (174), 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) [2021-08-13 08:16:29,196 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 08:16:29,196 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 08:16:29,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 08:16:29,196 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 08:16:29,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 08:16:29,197 INFO L82 PathProgramCache]: Analyzing trace with hash -1298833898, now seen corresponding path program 3 times [2021-08-13 08:16:29,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 08:16:29,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573197097] [2021-08-13 08:16:29,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 08:16:29,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 08:16:29,225 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,225 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 08:16:29,237 INFO L142 QuantifierPusher]: treesize reduction 4, result has 63.6 percent of original size [2021-08-13 08:16:29,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,243 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,243 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 08:16:29,249 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,250 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 08:16:29,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 08:16:29,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573197097] [2021-08-13 08:16:29,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573197097] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 08:16:29,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 08:16:29,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 08:16:29,251 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695755474] [2021-08-13 08:16:29,251 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 08:16:29,251 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 08:16:29,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 08:16:29,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-13 08:16:29,252 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 31 [2021-08-13 08:16:29,252 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 156 flow. Second operand has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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) [2021-08-13 08:16:29,252 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 08:16:29,252 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 31 [2021-08-13 08:16:29,253 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 08:16:29,303 INFO L129 PetriNetUnfolder]: 33/178 cut-off events. [2021-08-13 08:16:29,303 INFO L130 PetriNetUnfolder]: For 26/30 co-relation queries the response was YES. [2021-08-13 08:16:29,305 INFO L84 FinitePrefix]: Finished finitePrefix Result has 362 conditions, 178 events. 33/178 cut-off events. For 26/30 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 851 event pairs, 5 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 330. Up to 52 conditions per place. [2021-08-13 08:16:29,305 INFO L132 encePairwiseOnDemand]: 25/31 looper letters, 12 selfloop transitions, 5 changer transitions 13/55 dead transitions. [2021-08-13 08:16:29,305 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 55 transitions, 242 flow [2021-08-13 08:16:29,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 08:16:29,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 08:16:29,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 153 transitions. [2021-08-13 08:16:29,307 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8225806451612904 [2021-08-13 08:16:29,307 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 153 transitions. [2021-08-13 08:16:29,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 153 transitions. [2021-08-13 08:16:29,307 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 08:16:29,307 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 153 transitions. [2021-08-13 08:16:29,308 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 25.5) internal successors, (153), 6 states have internal predecessors, (153), 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) [2021-08-13 08:16:29,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 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) [2021-08-13 08:16:29,309 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 31.0) internal successors, (217), 7 states have internal predecessors, (217), 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) [2021-08-13 08:16:29,309 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 19 predicate places. [2021-08-13 08:16:29,309 INFO L482 AbstractCegarLoop]: Abstraction has has 53 places, 55 transitions, 242 flow [2021-08-13 08:16:29,309 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 22.5) internal successors, (135), 6 states have internal predecessors, (135), 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) [2021-08-13 08:16:29,309 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 08:16:29,309 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 08:16:29,309 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 08:16:29,309 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 08:16:29,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 08:16:29,310 INFO L82 PathProgramCache]: Analyzing trace with hash -1594527836, now seen corresponding path program 4 times [2021-08-13 08:16:29,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 08:16:29,310 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337011370] [2021-08-13 08:16:29,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 08:16:29,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 08:16:29,320 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 08:16:29,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 08:16:29,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337011370] [2021-08-13 08:16:29,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337011370] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 08:16:29,324 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 08:16:29,324 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 08:16:29,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711706494] [2021-08-13 08:16:29,324 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 08:16:29,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 08:16:29,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 08:16:29,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 08:16:29,325 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 31 [2021-08-13 08:16:29,325 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 55 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2021-08-13 08:16:29,325 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 08:16:29,326 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 31 [2021-08-13 08:16:29,326 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 08:16:29,343 INFO L129 PetriNetUnfolder]: 32/183 cut-off events. [2021-08-13 08:16:29,343 INFO L130 PetriNetUnfolder]: For 28/32 co-relation queries the response was YES. [2021-08-13 08:16:29,344 INFO L84 FinitePrefix]: Finished finitePrefix Result has 388 conditions, 183 events. 32/183 cut-off events. For 28/32 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 896 event pairs, 8 based on Foata normal form. 3/180 useless extension candidates. Maximal degree in co-relation 354. Up to 52 conditions per place. [2021-08-13 08:16:29,344 INFO L132 encePairwiseOnDemand]: 28/31 looper letters, 2 selfloop transitions, 2 changer transitions 14/55 dead transitions. [2021-08-13 08:16:29,344 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 55 transitions, 250 flow [2021-08-13 08:16:29,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 08:16:29,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 08:16:29,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2021-08-13 08:16:29,345 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8924731182795699 [2021-08-13 08:16:29,345 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2021-08-13 08:16:29,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2021-08-13 08:16:29,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 08:16:29,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2021-08-13 08:16:29,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-08-13 08:16:29,346 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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) [2021-08-13 08:16:29,347 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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) [2021-08-13 08:16:29,347 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 21 predicate places. [2021-08-13 08:16:29,347 INFO L482 AbstractCegarLoop]: Abstraction has has 55 places, 55 transitions, 250 flow [2021-08-13 08:16:29,347 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2021-08-13 08:16:29,347 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 08:16:29,347 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 08:16:29,347 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 08:16:29,347 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 08:16:29,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 08:16:29,348 INFO L82 PathProgramCache]: Analyzing trace with hash 783863264, now seen corresponding path program 5 times [2021-08-13 08:16:29,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 08:16:29,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402398108] [2021-08-13 08:16:29,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 08:16:29,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 08:16:29,371 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-08-13 08:16:29,381 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 08:16:29,390 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 08:16:29,391 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 08:16:29,400 INFO L142 QuantifierPusher]: treesize reduction 5, result has 70.6 percent of original size [2021-08-13 08:16:29,401 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 08:16:29,411 INFO L142 QuantifierPusher]: treesize reduction 15, result has 46.4 percent of original size [2021-08-13 08:16:29,411 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-08-13 08:16:29,419 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 08:16:29,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 08:16:29,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402398108] [2021-08-13 08:16:29,421 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402398108] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 08:16:29,421 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 08:16:29,421 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 08:16:29,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562430876] [2021-08-13 08:16:29,421 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 08:16:29,421 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 08:16:29,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 08:16:29,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-13 08:16:29,422 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 31 [2021-08-13 08:16:29,422 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 55 transitions, 250 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 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) [2021-08-13 08:16:29,423 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 08:16:29,423 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 31 [2021-08-13 08:16:29,423 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 08:16:29,481 INFO L129 PetriNetUnfolder]: 22/157 cut-off events. [2021-08-13 08:16:29,481 INFO L130 PetriNetUnfolder]: For 60/74 co-relation queries the response was YES. [2021-08-13 08:16:29,483 INFO L84 FinitePrefix]: Finished finitePrefix Result has 393 conditions, 157 events. 22/157 cut-off events. For 60/74 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 706 event pairs, 8 based on Foata normal form. 2/153 useless extension candidates. Maximal degree in co-relation 357. Up to 49 conditions per place. [2021-08-13 08:16:29,484 INFO L132 encePairwiseOnDemand]: 23/31 looper letters, 8 selfloop transitions, 2 changer transitions 22/57 dead transitions. [2021-08-13 08:16:29,484 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 57 transitions, 314 flow [2021-08-13 08:16:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-13 08:16:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-08-13 08:16:29,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2021-08-13 08:16:29,501 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7926267281105991 [2021-08-13 08:16:29,501 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 172 transitions. [2021-08-13 08:16:29,501 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 172 transitions. [2021-08-13 08:16:29,501 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 08:16:29,501 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 172 transitions. [2021-08-13 08:16:29,502 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 24.571428571428573) internal successors, (172), 7 states have internal predecessors, (172), 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) [2021-08-13 08:16:29,503 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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) [2021-08-13 08:16:29,503 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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) [2021-08-13 08:16:29,504 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 27 predicate places. [2021-08-13 08:16:29,504 INFO L482 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 314 flow [2021-08-13 08:16:29,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 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) [2021-08-13 08:16:29,504 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 08:16:29,504 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 08:16:29,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 08:16:29,504 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 08:16:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 08:16:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1160043718, now seen corresponding path program 6 times [2021-08-13 08:16:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 08:16:29,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755658423] [2021-08-13 08:16:29,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 08:16:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 08:16:29,535 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,536 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,536 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,537 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,538 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,539 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 08:16:29,539 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 08:16:29,539 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755658423] [2021-08-13 08:16:29,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755658423] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 08:16:29,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 08:16:29,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-13 08:16:29,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809240295] [2021-08-13 08:16:29,540 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-08-13 08:16:29,540 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 08:16:29,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-13 08:16:29,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-13 08:16:29,541 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 31 [2021-08-13 08:16:29,541 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2021-08-13 08:16:29,541 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 08:16:29,541 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 31 [2021-08-13 08:16:29,542 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 08:16:29,557 INFO L129 PetriNetUnfolder]: 23/165 cut-off events. [2021-08-13 08:16:29,558 INFO L130 PetriNetUnfolder]: For 61/73 co-relation queries the response was YES. [2021-08-13 08:16:29,558 INFO L84 FinitePrefix]: Finished finitePrefix Result has 429 conditions, 165 events. 23/165 cut-off events. For 61/73 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 755 event pairs, 10 based on Foata normal form. 4/164 useless extension candidates. Maximal degree in co-relation 391. Up to 53 conditions per place. [2021-08-13 08:16:29,559 INFO L132 encePairwiseOnDemand]: 28/31 looper letters, 2 selfloop transitions, 2 changer transitions 22/57 dead transitions. [2021-08-13 08:16:29,559 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 57 transitions, 322 flow [2021-08-13 08:16:29,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-13 08:16:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-08-13 08:16:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 83 transitions. [2021-08-13 08:16:29,560 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8924731182795699 [2021-08-13 08:16:29,560 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 83 transitions. [2021-08-13 08:16:29,560 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 83 transitions. [2021-08-13 08:16:29,560 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 08:16:29,560 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 83 transitions. [2021-08-13 08:16:29,561 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 27.666666666666668) internal successors, (83), 3 states have internal predecessors, (83), 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) [2021-08-13 08:16:29,561 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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) [2021-08-13 08:16:29,561 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 31.0) internal successors, (124), 4 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) [2021-08-13 08:16:29,561 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 29 predicate places. [2021-08-13 08:16:29,561 INFO L482 AbstractCegarLoop]: Abstraction has has 63 places, 57 transitions, 322 flow [2021-08-13 08:16:29,561 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 27.333333333333332) internal successors, (82), 3 states have internal predecessors, (82), 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) [2021-08-13 08:16:29,561 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 08:16:29,561 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 08:16:29,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-13 08:16:29,562 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 08:16:29,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 08:16:29,562 INFO L82 PathProgramCache]: Analyzing trace with hash 413003346, now seen corresponding path program 7 times [2021-08-13 08:16:29,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 08:16:29,563 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523455252] [2021-08-13 08:16:29,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 08:16:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 08:16:29,614 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,615 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-08-13 08:16:29,628 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,629 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 08:16:29,640 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,641 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,647 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 08:16:29,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 08:16:29,671 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,671 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 08:16:29,672 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 08:16:29,673 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523455252] [2021-08-13 08:16:29,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523455252] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 08:16:29,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 08:16:29,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 08:16:29,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416311585] [2021-08-13 08:16:29,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 08:16:29,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 08:16:29,676 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 08:16:29,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2021-08-13 08:16:29,680 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 31 [2021-08-13 08:16:29,681 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 57 transitions, 322 flow. Second operand has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 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) [2021-08-13 08:16:29,681 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 08:16:29,681 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 31 [2021-08-13 08:16:29,682 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 08:16:29,770 INFO L129 PetriNetUnfolder]: 19/183 cut-off events. [2021-08-13 08:16:29,771 INFO L130 PetriNetUnfolder]: For 139/169 co-relation queries the response was YES. [2021-08-13 08:16:29,771 INFO L84 FinitePrefix]: Finished finitePrefix Result has 530 conditions, 183 events. 19/183 cut-off events. For 139/169 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 924 event pairs, 3 based on Foata normal form. 3/184 useless extension candidates. Maximal degree in co-relation 474. Up to 55 conditions per place. [2021-08-13 08:16:29,773 INFO L132 encePairwiseOnDemand]: 22/31 looper letters, 3 selfloop transitions, 8 changer transitions 35/69 dead transitions. [2021-08-13 08:16:29,773 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 69 transitions, 474 flow [2021-08-13 08:16:29,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-13 08:16:29,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-08-13 08:16:29,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 221 transitions. [2021-08-13 08:16:29,774 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.7921146953405018 [2021-08-13 08:16:29,774 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 221 transitions. [2021-08-13 08:16:29,774 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 221 transitions. [2021-08-13 08:16:29,774 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 08:16:29,774 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 221 transitions. [2021-08-13 08:16:29,775 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 24.555555555555557) internal successors, (221), 9 states have internal predecessors, (221), 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) [2021-08-13 08:16:29,776 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 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) [2021-08-13 08:16:29,776 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 31.0) internal successors, (310), 10 states have internal predecessors, (310), 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) [2021-08-13 08:16:29,776 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 37 predicate places. [2021-08-13 08:16:29,776 INFO L482 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 474 flow [2021-08-13 08:16:29,776 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 22.125) internal successors, (177), 8 states have internal predecessors, (177), 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) [2021-08-13 08:16:29,776 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 08:16:29,776 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 08:16:29,776 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-08-13 08:16:29,776 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 08:16:29,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 08:16:29,777 INFO L82 PathProgramCache]: Analyzing trace with hash 2101371950, now seen corresponding path program 8 times [2021-08-13 08:16:29,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 08:16:29,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22545208] [2021-08-13 08:16:29,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 08:16:29,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 08:16:29,818 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,818 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 13 [2021-08-13 08:16:29,828 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,831 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 08:16:29,841 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 08:16:29,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 08:16:29,859 INFO L142 QuantifierPusher]: treesize reduction 5, result has 66.7 percent of original size [2021-08-13 08:16:29,859 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 08:16:29,870 INFO L142 QuantifierPusher]: treesize reduction 6, result has 66.7 percent of original size [2021-08-13 08:16:29,872 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 08:16:29,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 08:16:29,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-08-13 08:16:29,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 08:16:29,882 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 08:16:29,882 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22545208] [2021-08-13 08:16:29,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22545208] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 08:16:29,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 08:16:29,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 08:16:29,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [113260384] [2021-08-13 08:16:29,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 08:16:29,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 08:16:29,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 08:16:29,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-13 08:16:29,884 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 31 [2021-08-13 08:16:29,884 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 474 flow. Second operand has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 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) [2021-08-13 08:16:29,884 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 08:16:29,884 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 31 [2021-08-13 08:16:29,884 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 08:16:29,935 INFO L129 PetriNetUnfolder]: 16/125 cut-off events. [2021-08-13 08:16:29,935 INFO L130 PetriNetUnfolder]: For 155/173 co-relation queries the response was YES. [2021-08-13 08:16:29,935 INFO L84 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 125 events. 16/125 cut-off events. For 155/173 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 544 event pairs, 3 based on Foata normal form. 3/126 useless extension candidates. Maximal degree in co-relation 414. Up to 40 conditions per place. [2021-08-13 08:16:29,935 INFO L132 encePairwiseOnDemand]: 22/31 looper letters, 0 selfloop transitions, 0 changer transitions 61/61 dead transitions. [2021-08-13 08:16:29,936 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 61 transitions, 514 flow [2021-08-13 08:16:29,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-13 08:16:29,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-08-13 08:16:29,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2021-08-13 08:16:29,936 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.8110599078341014 [2021-08-13 08:16:29,937 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 176 transitions. [2021-08-13 08:16:29,937 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 176 transitions. [2021-08-13 08:16:29,937 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 08:16:29,937 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 176 transitions. [2021-08-13 08:16:29,937 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 25.142857142857142) internal successors, (176), 7 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 08:16:29,938 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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) [2021-08-13 08:16:29,938 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 31.0) internal successors, (248), 8 states have internal predecessors, (248), 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) [2021-08-13 08:16:29,938 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 39 predicate places. [2021-08-13 08:16:29,938 INFO L482 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 514 flow [2021-08-13 08:16:29,938 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 22.285714285714285) internal successors, (156), 7 states have internal predecessors, (156), 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) [2021-08-13 08:16:29,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 Received shutdown request... Cannot interrupt operation gracefully because timeout expired. Forcing shutdown