/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.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-9bbddad6b14272d9691b7fb6f1c011d15ab18596-9bbddad [2021-06-13 08:43:53,843 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-13 08:43:53,845 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-13 08:43:53,884 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-13 08:43:53,950 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-13 08:43:53,951 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-13 08:43:53,951 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-13 08:43:53,960 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 [2021-06-13 08:43:53,997 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-13 08:43:53,998 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-13 08:43:54,000 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-13 08:43:54,001 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-13 08:43:54,001 INFO L138 SettingsManager]: * Use SBE=true [2021-06-13 08:43:54,001 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-13 08:43:54,001 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-13 08:43:54,001 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-13 08:43:54,001 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-13 08:43:54,002 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-13 08:43:54,002 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-13 08:43:54,003 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-13 08:43:54,003 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-13 08:43:54,003 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-13 08:43:54,003 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-13 08:43:54,003 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-13 08:43:54,003 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-13 08:43:54,004 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-13 08:43:54,004 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-13 08:43:54,004 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-13 08:43:54,004 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-13 08:43:54,004 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:43:54,005 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-13 08:43:54,005 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-13 08:43:54,005 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-13 08:43:54,005 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-13 08:43:54,005 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-13 08:43:54,005 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-13 08:43:54,005 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-06-13 08:43:54,006 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-13 08:43:54,261 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-13 08:43:54,281 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-13 08:43:54,283 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-13 08:43:54,284 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-13 08:43:54,285 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-13 08:43:54,285 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl [2021-06-13 08:43:54,286 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/security.wvr.bpl' [2021-06-13 08:43:54,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-13 08:43:54,317 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-13 08:43:54,318 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-13 08:43:54,318 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-13 08:43:54,318 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-13 08:43:54,328 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,333 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,338 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-13 08:43:54,339 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-13 08:43:54,339 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-13 08:43:54,340 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-13 08:43:54,346 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,346 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,346 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,346 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,348 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,349 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,349 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... [2021-06-13 08:43:54,350 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-13 08:43:54,351 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-13 08:43:54,351 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-13 08:43:54,351 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-13 08:43:54,352 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-13 08:43:54,408 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-13 08:43:54,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-13 08:43:54,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-13 08:43:54,409 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-13 08:43:54,409 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-13 08:43:54,409 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-13 08:43:54,409 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-13 08:43:54,410 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-13 08:43:54,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-13 08:43:54,411 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-13 08:43:54,564 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-13 08:43:54,564 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-13 08:43:54,565 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:43:54 BoogieIcfgContainer [2021-06-13 08:43:54,566 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-13 08:43:54,567 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-13 08:43:54,567 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-13 08:43:54,569 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-13 08:43:54,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.06 08:43:54" (1/2) ... [2021-06-13 08:43:54,570 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1226848a and model type security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.06 08:43:54, skipping insertion in model container [2021-06-13 08:43:54,570 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.06 08:43:54" (2/2) ... [2021-06-13 08:43:54,572 INFO L111 eAbstractionObserver]: Analyzing ICFG security.wvr.bpl [2021-06-13 08:43:54,576 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-13 08:43:54,576 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-13 08:43:54,577 INFO L471 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-13 08:43:54,633 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-06-13 08:43:54,667 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-06-13 08:43:54,699 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-13 08:43:54,700 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-13 08:43:54,700 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-13 08:43:54,700 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-13 08:43:54,700 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-13 08:43:54,700 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-13 08:43:54,700 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-13 08:43:54,700 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-06-13 08:43:54,720 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 31 places, 28 transitions, 72 flow [2021-06-13 08:43:54,739 INFO L129 PetriNetUnfolder]: 4/26 cut-off events. [2021-06-13 08:43:54,739 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 08:43:54,742 INFO L84 FinitePrefix]: Finished finitePrefix Result has 35 conditions, 26 events. 4/26 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 32 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2021-06-13 08:43:54,743 INFO L82 GeneralOperation]: Start removeDead. Operand has 31 places, 28 transitions, 72 flow [2021-06-13 08:43:54,746 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 24 transitions, 60 flow [2021-06-13 08:43:54,754 INFO L129 PetriNetUnfolder]: 4/23 cut-off events. [2021-06-13 08:43:54,754 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 08:43:54,755 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:54,755 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:54,755 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:54,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:54,760 INFO L82 PathProgramCache]: Analyzing trace with hash 105025108, now seen corresponding path program 1 times [2021-06-13 08:43:54,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:54,767 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697290363] [2021-06-13 08:43:54,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:54,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:54,855 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:54,856 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:54,857 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:54,857 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-13 08:43:54,867 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:54,868 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:54,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:54,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:54,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697290363] [2021-06-13 08:43:54,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [697290363] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:54,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:54,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:43:54,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344005330] [2021-06-13 08:43:54,878 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:43:54,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:54,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:43:54,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:43:54,891 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 28 [2021-06-13 08:43:54,894 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 24 transitions, 60 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,894 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:54,894 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 28 [2021-06-13 08:43:54,896 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:54,916 INFO L129 PetriNetUnfolder]: 3/31 cut-off events. [2021-06-13 08:43:54,916 INFO L130 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2021-06-13 08:43:54,917 INFO L84 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 31 events. 3/31 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 54 event pairs, 0 based on Foata normal form. 0/27 useless extension candidates. Maximal degree in co-relation 30. Up to 3 conditions per place. [2021-06-13 08:43:54,918 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 3 selfloop transitions, 2 changer transitions 0/25 dead transitions. [2021-06-13 08:43:54,918 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 25 transitions, 72 flow [2021-06-13 08:43:54,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:43:54,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:43:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2021-06-13 08:43:54,928 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-06-13 08:43:54,928 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2021-06-13 08:43:54,929 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2021-06-13 08:43:54,930 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:54,931 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2021-06-13 08:43:54,933 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,936 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,937 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,938 INFO L185 Difference]: Start difference. First operand has 27 places, 24 transitions, 60 flow. Second operand 3 states and 75 transitions. [2021-06-13 08:43:54,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 25 transitions, 72 flow [2021-06-13 08:43:54,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 25 places, 25 transitions, 64 flow, removed 0 selfloop flow, removed 4 redundant places. [2021-06-13 08:43:54,943 INFO L241 Difference]: Finished difference. Result has 27 places, 25 transitions, 66 flow [2021-06-13 08:43:54,945 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=52, PETRI_DIFFERENCE_MINUEND_PLACES=23, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=24, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=27, PETRI_TRANSITIONS=25} [2021-06-13 08:43:54,946 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 0 predicate places. [2021-06-13 08:43:54,946 INFO L482 AbstractCegarLoop]: Abstraction has has 27 places, 25 transitions, 66 flow [2021-06-13 08:43:54,946 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,946 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:54,946 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:54,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-13 08:43:54,947 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:54,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:54,948 INFO L82 PathProgramCache]: Analyzing trace with hash -200844120, now seen corresponding path program 1 times [2021-06-13 08:43:54,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:54,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797411296] [2021-06-13 08:43:54,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:54,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:54,959 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:54,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:54,960 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:54,960 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 2 [2021-06-13 08:43:54,964 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:54,964 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:54,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:54,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:54,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797411296] [2021-06-13 08:43:54,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797411296] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:54,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:54,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-13 08:43:54,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405130230] [2021-06-13 08:43:54,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-13 08:43:54,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:54,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-13 08:43:54,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-13 08:43:54,969 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 28 [2021-06-13 08:43:54,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 25 transitions, 66 flow. Second operand has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:54,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 28 [2021-06-13 08:43:54,969 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:54,985 INFO L129 PetriNetUnfolder]: 2/40 cut-off events. [2021-06-13 08:43:54,985 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-06-13 08:43:54,986 INFO L84 FinitePrefix]: Finished finitePrefix Result has 57 conditions, 40 events. 2/40 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 99 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 35. Up to 4 conditions per place. [2021-06-13 08:43:54,986 INFO L132 encePairwiseOnDemand]: 25/28 looper letters, 3 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2021-06-13 08:43:54,986 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 29 places, 26 transitions, 78 flow [2021-06-13 08:43:54,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-13 08:43:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2021-06-13 08:43:54,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 75 transitions. [2021-06-13 08:43:54,988 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8928571428571429 [2021-06-13 08:43:54,988 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 75 transitions. [2021-06-13 08:43:54,988 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 75 transitions. [2021-06-13 08:43:54,989 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:54,989 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 75 transitions. [2021-06-13 08:43:54,989 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,990 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,990 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 28.0) internal successors, (112), 4 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,990 INFO L185 Difference]: Start difference. First operand has 27 places, 25 transitions, 66 flow. Second operand 3 states and 75 transitions. [2021-06-13 08:43:54,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 29 places, 26 transitions, 78 flow [2021-06-13 08:43:54,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 28 places, 26 transitions, 76 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 08:43:54,992 INFO L241 Difference]: Finished difference. Result has 30 places, 26 transitions, 78 flow [2021-06-13 08:43:54,993 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=64, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=78, PETRI_PLACES=30, PETRI_TRANSITIONS=26} [2021-06-13 08:43:54,993 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 3 predicate places. [2021-06-13 08:43:54,993 INFO L482 AbstractCegarLoop]: Abstraction has has 30 places, 26 transitions, 78 flow [2021-06-13 08:43:54,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 23.666666666666668) internal successors, (71), 3 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:54,994 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:54,994 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:54,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-13 08:43:54,994 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:54,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:54,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1818140272, now seen corresponding path program 1 times [2021-06-13 08:43:54,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:54,995 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787276572] [2021-06-13 08:43:54,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:55,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:55,059 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,060 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:55,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,080 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:55,093 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,094 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:55,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:55,121 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,123 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:55,139 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:55,140 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:55,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,154 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:55,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:55,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787276572] [2021-06-13 08:43:55,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787276572] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:55,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:55,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:55,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194101928] [2021-06-13 08:43:55,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:55,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:55,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:55,161 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:55,163 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 30 places, 26 transitions, 78 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,163 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:55,163 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:55,163 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:55,344 INFO L129 PetriNetUnfolder]: 31/130 cut-off events. [2021-06-13 08:43:55,344 INFO L130 PetriNetUnfolder]: For 5/5 co-relation queries the response was YES. [2021-06-13 08:43:55,346 INFO L84 FinitePrefix]: Finished finitePrefix Result has 237 conditions, 130 events. 31/130 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 574 event pairs, 0 based on Foata normal form. 2/126 useless extension candidates. Maximal degree in co-relation 200. Up to 25 conditions per place. [2021-06-13 08:43:55,348 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 13 selfloop transitions, 6 changer transitions 1/38 dead transitions. [2021-06-13 08:43:55,348 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 38 transitions, 142 flow [2021-06-13 08:43:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 08:43:55,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 08:43:55,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2021-06-13 08:43:55,354 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-13 08:43:55,354 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 154 transitions. [2021-06-13 08:43:55,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 154 transitions. [2021-06-13 08:43:55,357 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:55,357 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 154 transitions. [2021-06-13 08:43:55,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,362 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,362 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,362 INFO L185 Difference]: Start difference. First operand has 30 places, 26 transitions, 78 flow. Second operand 7 states and 154 transitions. [2021-06-13 08:43:55,362 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 38 transitions, 142 flow [2021-06-13 08:43:55,365 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 38 transitions, 140 flow, removed 0 selfloop flow, removed 1 redundant places. [2021-06-13 08:43:55,368 INFO L241 Difference]: Finished difference. Result has 39 places, 29 transitions, 112 flow [2021-06-13 08:43:55,369 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=112, PETRI_PLACES=39, PETRI_TRANSITIONS=29} [2021-06-13 08:43:55,369 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 12 predicate places. [2021-06-13 08:43:55,369 INFO L482 AbstractCegarLoop]: Abstraction has has 39 places, 29 transitions, 112 flow [2021-06-13 08:43:55,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,370 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:55,370 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:55,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-13 08:43:55,372 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:55,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:55,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1688753635, now seen corresponding path program 1 times [2021-06-13 08:43:55,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:55,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404328697] [2021-06-13 08:43:55,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:55,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:55,420 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,420 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:55,423 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,424 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:55,435 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,436 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:55,446 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,448 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:55,458 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:55,461 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:55,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:55,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:55,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:55,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404328697] [2021-06-13 08:43:55,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1404328697] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:55,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:55,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-13 08:43:55,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660296516] [2021-06-13 08:43:55,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-13 08:43:55,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:55,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-13 08:43:55,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-13 08:43:55,478 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 28 [2021-06-13 08:43:55,479 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 29 transitions, 112 flow. Second operand has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,479 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:55,479 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 28 [2021-06-13 08:43:55,479 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:55,596 INFO L129 PetriNetUnfolder]: 26/117 cut-off events. [2021-06-13 08:43:55,596 INFO L130 PetriNetUnfolder]: For 75/79 co-relation queries the response was YES. [2021-06-13 08:43:55,597 INFO L84 FinitePrefix]: Finished finitePrefix Result has 289 conditions, 117 events. 26/117 cut-off events. For 75/79 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 545 event pairs, 8 based on Foata normal form. 5/113 useless extension candidates. Maximal degree in co-relation 264. Up to 35 conditions per place. [2021-06-13 08:43:55,598 INFO L132 encePairwiseOnDemand]: 21/28 looper letters, 15 selfloop transitions, 7 changer transitions 1/42 dead transitions. [2021-06-13 08:43:55,598 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 42 transitions, 217 flow [2021-06-13 08:43:55,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-13 08:43:55,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-06-13 08:43:55,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 139 transitions. [2021-06-13 08:43:55,602 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8273809523809523 [2021-06-13 08:43:55,602 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 139 transitions. [2021-06-13 08:43:55,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 139 transitions. [2021-06-13 08:43:55,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:55,603 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 139 transitions. [2021-06-13 08:43:55,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 23.166666666666668) internal successors, (139), 6 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,604 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,604 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 28.0) internal successors, (196), 7 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,604 INFO L185 Difference]: Start difference. First operand has 39 places, 29 transitions, 112 flow. Second operand 6 states and 139 transitions. [2021-06-13 08:43:55,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 42 transitions, 217 flow [2021-06-13 08:43:55,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 42 transitions, 202 flow, removed 2 selfloop flow, removed 3 redundant places. [2021-06-13 08:43:55,607 INFO L241 Difference]: Finished difference. Result has 44 places, 33 transitions, 158 flow [2021-06-13 08:43:55,607 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=158, PETRI_PLACES=44, PETRI_TRANSITIONS=33} [2021-06-13 08:43:55,608 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 17 predicate places. [2021-06-13 08:43:55,608 INFO L482 AbstractCegarLoop]: Abstraction has has 44 places, 33 transitions, 158 flow [2021-06-13 08:43:55,608 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 20.833333333333332) internal successors, (125), 6 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,608 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:55,608 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:55,608 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-13 08:43:55,608 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:55,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:55,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1708606592, now seen corresponding path program 1 times [2021-06-13 08:43:55,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:55,609 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996923842] [2021-06-13 08:43:55,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:55,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:55,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:55,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:55,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,664 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:55,672 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,673 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:55,687 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:55,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:55,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,699 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:55,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:55,700 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:55,700 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996923842] [2021-06-13 08:43:55,700 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996923842] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:55,700 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:55,701 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:55,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597793127] [2021-06-13 08:43:55,701 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:55,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:55,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:55,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:55,702 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:55,703 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 33 transitions, 158 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,703 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:55,703 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:55,703 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:55,842 INFO L129 PetriNetUnfolder]: 35/169 cut-off events. [2021-06-13 08:43:55,842 INFO L130 PetriNetUnfolder]: For 241/245 co-relation queries the response was YES. [2021-06-13 08:43:55,843 INFO L84 FinitePrefix]: Finished finitePrefix Result has 481 conditions, 169 events. 35/169 cut-off events. For 241/245 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 908 event pairs, 2 based on Foata normal form. 6/165 useless extension candidates. Maximal degree in co-relation 445. Up to 52 conditions per place. [2021-06-13 08:43:55,844 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 20 selfloop transitions, 9 changer transitions 3/50 dead transitions. [2021-06-13 08:43:55,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 50 transitions, 324 flow [2021-06-13 08:43:55,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 08:43:55,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 08:43:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2021-06-13 08:43:55,846 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7959183673469388 [2021-06-13 08:43:55,846 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 156 transitions. [2021-06-13 08:43:55,846 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 156 transitions. [2021-06-13 08:43:55,846 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:55,846 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 156 transitions. [2021-06-13 08:43:55,847 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 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) [2021-06-13 08:43:55,848 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,848 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,848 INFO L185 Difference]: Start difference. First operand has 44 places, 33 transitions, 158 flow. Second operand 7 states and 156 transitions. [2021-06-13 08:43:55,848 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 50 transitions, 324 flow [2021-06-13 08:43:55,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 50 transitions, 304 flow, removed 7 selfloop flow, removed 2 redundant places. [2021-06-13 08:43:55,852 INFO L241 Difference]: Finished difference. Result has 51 places, 36 transitions, 207 flow [2021-06-13 08:43:55,852 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=207, PETRI_PLACES=51, PETRI_TRANSITIONS=36} [2021-06-13 08:43:55,853 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 24 predicate places. [2021-06-13 08:43:55,853 INFO L482 AbstractCegarLoop]: Abstraction has has 51 places, 36 transitions, 207 flow [2021-06-13 08:43:55,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,853 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:55,853 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:55,853 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-13 08:43:55,854 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:55,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:55,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1713842808, now seen corresponding path program 2 times [2021-06-13 08:43:55,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:55,854 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278923190] [2021-06-13 08:43:55,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:55,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:55,880 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,881 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:55,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:55,889 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,890 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:55,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:55,906 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,907 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:55,918 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:55,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:55,930 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:55,930 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:55,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:55,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278923190] [2021-06-13 08:43:55,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278923190] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:55,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:55,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:55,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781492364] [2021-06-13 08:43:55,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:55,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:55,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:55,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:55,941 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:55,942 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 36 transitions, 207 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:55,942 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:55,942 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:55,942 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:56,086 INFO L129 PetriNetUnfolder]: 35/176 cut-off events. [2021-06-13 08:43:56,086 INFO L130 PetriNetUnfolder]: For 449/453 co-relation queries the response was YES. [2021-06-13 08:43:56,087 INFO L84 FinitePrefix]: Finished finitePrefix Result has 551 conditions, 176 events. 35/176 cut-off events. For 449/453 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 966 event pairs, 9 based on Foata normal form. 5/166 useless extension candidates. Maximal degree in co-relation 512. Up to 45 conditions per place. [2021-06-13 08:43:56,088 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 22 selfloop transitions, 10 changer transitions 5/55 dead transitions. [2021-06-13 08:43:56,088 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 55 transitions, 419 flow [2021-06-13 08:43:56,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:43:56,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:43:56,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2021-06-13 08:43:56,089 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7901785714285714 [2021-06-13 08:43:56,090 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 177 transitions. [2021-06-13 08:43:56,090 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 177 transitions. [2021-06-13 08:43:56,090 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:56,090 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 177 transitions. [2021-06-13 08:43:56,091 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 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) [2021-06-13 08:43:56,091 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,092 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,092 INFO L185 Difference]: Start difference. First operand has 51 places, 36 transitions, 207 flow. Second operand 8 states and 177 transitions. [2021-06-13 08:43:56,092 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 55 transitions, 419 flow [2021-06-13 08:43:56,095 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 55 transitions, 396 flow, removed 10 selfloop flow, removed 2 redundant places. [2021-06-13 08:43:56,096 INFO L241 Difference]: Finished difference. Result has 61 places, 39 transitions, 271 flow [2021-06-13 08:43:56,097 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=61, PETRI_TRANSITIONS=39} [2021-06-13 08:43:56,097 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 34 predicate places. [2021-06-13 08:43:56,097 INFO L482 AbstractCegarLoop]: Abstraction has has 61 places, 39 transitions, 271 flow [2021-06-13 08:43:56,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,097 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:56,097 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:56,098 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-13 08:43:56,098 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:56,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:56,098 INFO L82 PathProgramCache]: Analyzing trace with hash -1693393444, now seen corresponding path program 3 times [2021-06-13 08:43:56,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:56,099 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399022888] [2021-06-13 08:43:56,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:56,116 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,117 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:56,117 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,119 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,126 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,137 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:56,165 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:56,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:56,174 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,176 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:56,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:56,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399022888] [2021-06-13 08:43:56,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399022888] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:56,177 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:56,177 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:56,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372208088] [2021-06-13 08:43:56,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:56,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:56,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:56,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:56,179 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:56,179 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 39 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,179 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:56,179 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:56,179 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:56,316 INFO L129 PetriNetUnfolder]: 43/215 cut-off events. [2021-06-13 08:43:56,316 INFO L130 PetriNetUnfolder]: For 803/803 co-relation queries the response was YES. [2021-06-13 08:43:56,317 INFO L84 FinitePrefix]: Finished finitePrefix Result has 755 conditions, 215 events. 43/215 cut-off events. For 803/803 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1275 event pairs, 10 based on Foata normal form. 3/206 useless extension candidates. Maximal degree in co-relation 703. Up to 67 conditions per place. [2021-06-13 08:43:56,320 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 27 selfloop transitions, 17 changer transitions 4/66 dead transitions. [2021-06-13 08:43:56,320 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 66 transitions, 615 flow [2021-06-13 08:43:56,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 08:43:56,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 08:43:56,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2021-06-13 08:43:56,322 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8061224489795918 [2021-06-13 08:43:56,322 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 158 transitions. [2021-06-13 08:43:56,322 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 158 transitions. [2021-06-13 08:43:56,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:56,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 158 transitions. [2021-06-13 08:43:56,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,323 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,323 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,323 INFO L185 Difference]: Start difference. First operand has 61 places, 39 transitions, 271 flow. Second operand 7 states and 158 transitions. [2021-06-13 08:43:56,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 66 transitions, 615 flow [2021-06-13 08:43:56,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 66 transitions, 563 flow, removed 16 selfloop flow, removed 5 redundant places. [2021-06-13 08:43:56,331 INFO L241 Difference]: Finished difference. Result has 64 places, 52 transitions, 443 flow [2021-06-13 08:43:56,332 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=248, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=443, PETRI_PLACES=64, PETRI_TRANSITIONS=52} [2021-06-13 08:43:56,332 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 37 predicate places. [2021-06-13 08:43:56,332 INFO L482 AbstractCegarLoop]: Abstraction has has 64 places, 52 transitions, 443 flow [2021-06-13 08:43:56,332 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,332 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:56,333 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:56,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-13 08:43:56,333 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:56,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:56,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1042032950, now seen corresponding path program 4 times [2021-06-13 08:43:56,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:56,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389634687] [2021-06-13 08:43:56,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:56,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:56,375 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,376 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:56,377 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,377 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,382 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,382 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,388 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,390 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:56,398 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,398 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:56,410 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:56,411 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:56,421 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,421 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:56,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:56,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:56,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389634687] [2021-06-13 08:43:56,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389634687] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:56,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:56,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:56,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20924785] [2021-06-13 08:43:56,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:56,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:56,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:56,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:56,425 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:56,425 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 52 transitions, 443 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,425 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:56,425 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:56,425 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:56,576 INFO L129 PetriNetUnfolder]: 41/214 cut-off events. [2021-06-13 08:43:56,576 INFO L130 PetriNetUnfolder]: For 1052/1052 co-relation queries the response was YES. [2021-06-13 08:43:56,579 INFO L84 FinitePrefix]: Finished finitePrefix Result has 797 conditions, 214 events. 41/214 cut-off events. For 1052/1052 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1303 event pairs, 4 based on Foata normal form. 1/202 useless extension candidates. Maximal degree in co-relation 744. Up to 67 conditions per place. [2021-06-13 08:43:56,581 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 29 selfloop transitions, 13 changer transitions 7/67 dead transitions. [2021-06-13 08:43:56,581 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 679 flow [2021-06-13 08:43:56,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 08:43:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 08:43:56,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2021-06-13 08:43:56,583 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7959183673469388 [2021-06-13 08:43:56,583 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 156 transitions. [2021-06-13 08:43:56,583 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 156 transitions. [2021-06-13 08:43:56,584 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:56,584 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 156 transitions. [2021-06-13 08:43:56,584 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 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) [2021-06-13 08:43:56,585 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,585 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,585 INFO L185 Difference]: Start difference. First operand has 64 places, 52 transitions, 443 flow. Second operand 7 states and 156 transitions. [2021-06-13 08:43:56,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 679 flow [2021-06-13 08:43:56,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 67 transitions, 673 flow, removed 3 selfloop flow, removed 1 redundant places. [2021-06-13 08:43:56,591 INFO L241 Difference]: Finished difference. Result has 72 places, 52 transitions, 484 flow [2021-06-13 08:43:56,591 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=439, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=484, PETRI_PLACES=72, PETRI_TRANSITIONS=52} [2021-06-13 08:43:56,591 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 45 predicate places. [2021-06-13 08:43:56,591 INFO L482 AbstractCegarLoop]: Abstraction has has 72 places, 52 transitions, 484 flow [2021-06-13 08:43:56,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,592 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:56,592 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:56,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-06-13 08:43:56,592 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:56,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:56,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1289656718, now seen corresponding path program 5 times [2021-06-13 08:43:56,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:56,593 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [581641794] [2021-06-13 08:43:56,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:56,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:56,619 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,620 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:56,621 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,621 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,628 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,634 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,634 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,650 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:56,662 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:56,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:56,673 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,674 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:56,674 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:56,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:56,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [581641794] [2021-06-13 08:43:56,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [581641794] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:56,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:56,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:56,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918009528] [2021-06-13 08:43:56,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:56,676 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:56,678 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 52 transitions, 484 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,678 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:56,678 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:56,678 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:56,877 INFO L129 PetriNetUnfolder]: 36/213 cut-off events. [2021-06-13 08:43:56,878 INFO L130 PetriNetUnfolder]: For 1304/1304 co-relation queries the response was YES. [2021-06-13 08:43:56,879 INFO L84 FinitePrefix]: Finished finitePrefix Result has 830 conditions, 213 events. 36/213 cut-off events. For 1304/1304 co-relation queries the response was YES. Maximal size of possible extension queue 35. Compared 1321 event pairs, 9 based on Foata normal form. 3/200 useless extension candidates. Maximal degree in co-relation 778. Up to 52 conditions per place. [2021-06-13 08:43:56,880 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 27 selfloop transitions, 23 changer transitions 6/74 dead transitions. [2021-06-13 08:43:56,880 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 74 transitions, 818 flow [2021-06-13 08:43:56,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-13 08:43:56,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-06-13 08:43:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 224 transitions. [2021-06-13 08:43:56,881 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8 [2021-06-13 08:43:56,881 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 224 transitions. [2021-06-13 08:43:56,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 224 transitions. [2021-06-13 08:43:56,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:56,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 224 transitions. [2021-06-13 08:43:56,882 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 22.4) internal successors, (224), 10 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,883 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 28.0) internal successors, (308), 11 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,883 INFO L185 Difference]: Start difference. First operand has 72 places, 52 transitions, 484 flow. Second operand 10 states and 224 transitions. [2021-06-13 08:43:56,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 74 transitions, 818 flow [2021-06-13 08:43:56,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 74 transitions, 792 flow, removed 5 selfloop flow, removed 4 redundant places. [2021-06-13 08:43:56,892 INFO L241 Difference]: Finished difference. Result has 83 places, 60 transitions, 648 flow [2021-06-13 08:43:56,892 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=468, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=648, PETRI_PLACES=83, PETRI_TRANSITIONS=60} [2021-06-13 08:43:56,892 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 56 predicate places. [2021-06-13 08:43:56,892 INFO L482 AbstractCegarLoop]: Abstraction has has 83 places, 60 transitions, 648 flow [2021-06-13 08:43:56,892 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,892 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:56,892 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:56,893 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-13 08:43:56,893 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:56,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:56,893 INFO L82 PathProgramCache]: Analyzing trace with hash 931841654, now seen corresponding path program 6 times [2021-06-13 08:43:56,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:56,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549491299] [2021-06-13 08:43:56,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:56,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:56,918 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,919 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:56,920 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,920 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,925 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,926 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,931 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,932 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:56,938 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,938 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:56,950 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:56,953 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:56,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:56,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:56,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:56,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549491299] [2021-06-13 08:43:56,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549491299] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:56,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:56,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:56,965 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647997896] [2021-06-13 08:43:56,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:56,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:56,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:56,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:56,967 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:56,967 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 60 transitions, 648 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:56,967 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:56,967 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:56,967 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:57,109 INFO L129 PetriNetUnfolder]: 36/198 cut-off events. [2021-06-13 08:43:57,109 INFO L130 PetriNetUnfolder]: For 1605/1605 co-relation queries the response was YES. [2021-06-13 08:43:57,110 INFO L84 FinitePrefix]: Finished finitePrefix Result has 878 conditions, 198 events. 36/198 cut-off events. For 1605/1605 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1165 event pairs, 1 based on Foata normal form. 1/187 useless extension candidates. Maximal degree in co-relation 828. Up to 67 conditions per place. [2021-06-13 08:43:57,112 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 29 selfloop transitions, 17 changer transitions 5/69 dead transitions. [2021-06-13 08:43:57,112 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 69 transitions, 853 flow [2021-06-13 08:43:57,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 08:43:57,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 08:43:57,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2021-06-13 08:43:57,113 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7959183673469388 [2021-06-13 08:43:57,113 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 156 transitions. [2021-06-13 08:43:57,113 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 156 transitions. [2021-06-13 08:43:57,114 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:57,114 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 156 transitions. [2021-06-13 08:43:57,114 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 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) [2021-06-13 08:43:57,115 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,115 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,115 INFO L185 Difference]: Start difference. First operand has 83 places, 60 transitions, 648 flow. Second operand 7 states and 156 transitions. [2021-06-13 08:43:57,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 69 transitions, 853 flow [2021-06-13 08:43:57,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 69 transitions, 801 flow, removed 18 selfloop flow, removed 4 redundant places. [2021-06-13 08:43:57,123 INFO L241 Difference]: Finished difference. Result has 85 places, 59 transitions, 631 flow [2021-06-13 08:43:57,123 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=631, PETRI_PLACES=85, PETRI_TRANSITIONS=59} [2021-06-13 08:43:57,123 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2021-06-13 08:43:57,123 INFO L482 AbstractCegarLoop]: Abstraction has has 85 places, 59 transitions, 631 flow [2021-06-13 08:43:57,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,124 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:57,124 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:57,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-06-13 08:43:57,124 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:57,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:57,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1435471434, now seen corresponding path program 7 times [2021-06-13 08:43:57,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:57,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846240591] [2021-06-13 08:43:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:57,137 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,138 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:57,138 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,145 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:57,159 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,159 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:57,169 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:57,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:57,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,181 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:57,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:57,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:57,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846240591] [2021-06-13 08:43:57,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846240591] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:57,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:57,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:57,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988724809] [2021-06-13 08:43:57,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:57,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:57,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:57,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:57,183 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:57,184 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 59 transitions, 631 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,184 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:57,184 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:57,184 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:57,302 INFO L129 PetriNetUnfolder]: 36/191 cut-off events. [2021-06-13 08:43:57,302 INFO L130 PetriNetUnfolder]: For 1565/1565 co-relation queries the response was YES. [2021-06-13 08:43:57,303 INFO L84 FinitePrefix]: Finished finitePrefix Result has 840 conditions, 191 events. 36/191 cut-off events. For 1565/1565 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1087 event pairs, 0 based on Foata normal form. 1/180 useless extension candidates. Maximal degree in co-relation 781. Up to 38 conditions per place. [2021-06-13 08:43:57,304 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 33 selfloop transitions, 18 changer transitions 4/73 dead transitions. [2021-06-13 08:43:57,304 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 73 transitions, 907 flow [2021-06-13 08:43:57,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 08:43:57,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 08:43:57,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 154 transitions. [2021-06-13 08:43:57,305 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-13 08:43:57,306 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 154 transitions. [2021-06-13 08:43:57,306 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 154 transitions. [2021-06-13 08:43:57,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:57,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 154 transitions. [2021-06-13 08:43:57,306 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.0) internal successors, (154), 7 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,307 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,308 INFO L185 Difference]: Start difference. First operand has 85 places, 59 transitions, 631 flow. Second operand 7 states and 154 transitions. [2021-06-13 08:43:57,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 73 transitions, 907 flow [2021-06-13 08:43:57,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 73 transitions, 849 flow, removed 9 selfloop flow, removed 6 redundant places. [2021-06-13 08:43:57,316 INFO L241 Difference]: Finished difference. Result has 86 places, 61 transitions, 674 flow [2021-06-13 08:43:57,316 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=581, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=674, PETRI_PLACES=86, PETRI_TRANSITIONS=61} [2021-06-13 08:43:57,316 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 59 predicate places. [2021-06-13 08:43:57,316 INFO L482 AbstractCegarLoop]: Abstraction has has 86 places, 61 transitions, 674 flow [2021-06-13 08:43:57,317 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,317 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:57,317 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:57,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-06-13 08:43:57,317 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:57,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:57,318 INFO L82 PathProgramCache]: Analyzing trace with hash -804770658, now seen corresponding path program 8 times [2021-06-13 08:43:57,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:57,319 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898603008] [2021-06-13 08:43:57,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:57,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:57,351 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,351 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:57,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,352 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,358 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,365 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:57,390 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:57,391 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:57,404 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,405 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:57,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:57,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:57,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898603008] [2021-06-13 08:43:57,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898603008] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:57,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:57,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:57,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796267639] [2021-06-13 08:43:57,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:57,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:57,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:57,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:57,410 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:57,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 61 transitions, 674 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:57,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:57,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:57,531 INFO L129 PetriNetUnfolder]: 36/184 cut-off events. [2021-06-13 08:43:57,531 INFO L130 PetriNetUnfolder]: For 1663/1663 co-relation queries the response was YES. [2021-06-13 08:43:57,532 INFO L84 FinitePrefix]: Finished finitePrefix Result has 828 conditions, 184 events. 36/184 cut-off events. For 1663/1663 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1028 event pairs, 1 based on Foata normal form. 2/174 useless extension candidates. Maximal degree in co-relation 776. Up to 64 conditions per place. [2021-06-13 08:43:57,533 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 28 selfloop transitions, 22 changer transitions 3/71 dead transitions. [2021-06-13 08:43:57,533 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 71 transitions, 897 flow [2021-06-13 08:43:57,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 08:43:57,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 08:43:57,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 155 transitions. [2021-06-13 08:43:57,534 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7908163265306123 [2021-06-13 08:43:57,534 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 155 transitions. [2021-06-13 08:43:57,534 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 155 transitions. [2021-06-13 08:43:57,534 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:57,534 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 155 transitions. [2021-06-13 08:43:57,535 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.142857142857142) internal successors, (155), 7 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,535 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,535 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,535 INFO L185 Difference]: Start difference. First operand has 86 places, 61 transitions, 674 flow. Second operand 7 states and 155 transitions. [2021-06-13 08:43:57,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 71 transitions, 897 flow [2021-06-13 08:43:57,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 71 transitions, 850 flow, removed 7 selfloop flow, removed 5 redundant places. [2021-06-13 08:43:57,542 INFO L241 Difference]: Finished difference. Result has 88 places, 64 transitions, 734 flow [2021-06-13 08:43:57,542 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=637, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=734, PETRI_PLACES=88, PETRI_TRANSITIONS=64} [2021-06-13 08:43:57,543 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 61 predicate places. [2021-06-13 08:43:57,543 INFO L482 AbstractCegarLoop]: Abstraction has has 88 places, 64 transitions, 734 flow [2021-06-13 08:43:57,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,543 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:57,543 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:57,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-06-13 08:43:57,543 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:57,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:57,543 INFO L82 PathProgramCache]: Analyzing trace with hash -284784818, now seen corresponding path program 9 times [2021-06-13 08:43:57,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:57,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935203597] [2021-06-13 08:43:57,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:57,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:57,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:57,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,555 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,559 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,560 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,566 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:57,577 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,578 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:57,590 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:57,590 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:57,599 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,599 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:57,600 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:57,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:57,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935203597] [2021-06-13 08:43:57,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935203597] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:57,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:57,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:57,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448996021] [2021-06-13 08:43:57,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:57,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:57,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:57,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:57,601 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:57,602 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 64 transitions, 734 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,602 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:57,602 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:57,602 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:57,721 INFO L129 PetriNetUnfolder]: 35/169 cut-off events. [2021-06-13 08:43:57,722 INFO L130 PetriNetUnfolder]: For 1469/1469 co-relation queries the response was YES. [2021-06-13 08:43:57,723 INFO L84 FinitePrefix]: Finished finitePrefix Result has 786 conditions, 169 events. 35/169 cut-off events. For 1469/1469 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 922 event pairs, 9 based on Foata normal form. 1/154 useless extension candidates. Maximal degree in co-relation 738. Up to 53 conditions per place. [2021-06-13 08:43:57,723 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 26 selfloop transitions, 21 changer transitions 7/72 dead transitions. [2021-06-13 08:43:57,723 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 72 transitions, 937 flow [2021-06-13 08:43:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-13 08:43:57,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2021-06-13 08:43:57,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2021-06-13 08:43:57,725 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.8061224489795918 [2021-06-13 08:43:57,725 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 158 transitions. [2021-06-13 08:43:57,725 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 158 transitions. [2021-06-13 08:43:57,725 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:57,725 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 158 transitions. [2021-06-13 08:43:57,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 22.571428571428573) internal successors, (158), 7 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,726 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,726 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 28.0) internal successors, (224), 8 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,726 INFO L185 Difference]: Start difference. First operand has 88 places, 64 transitions, 734 flow. Second operand 7 states and 158 transitions. [2021-06-13 08:43:57,726 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 72 transitions, 937 flow [2021-06-13 08:43:57,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 72 transitions, 845 flow, removed 14 selfloop flow, removed 9 redundant places. [2021-06-13 08:43:57,736 INFO L241 Difference]: Finished difference. Result has 85 places, 61 transitions, 658 flow [2021-06-13 08:43:57,737 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=652, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=658, PETRI_PLACES=85, PETRI_TRANSITIONS=61} [2021-06-13 08:43:57,737 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2021-06-13 08:43:57,737 INFO L482 AbstractCegarLoop]: Abstraction has has 85 places, 61 transitions, 658 flow [2021-06-13 08:43:57,737 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,737 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:57,737 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:57,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-06-13 08:43:57,737 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:57,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:57,738 INFO L82 PathProgramCache]: Analyzing trace with hash -790261820, now seen corresponding path program 10 times [2021-06-13 08:43:57,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:57,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900704909] [2021-06-13 08:43:57,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:57,769 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,769 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:57,771 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,772 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,777 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,777 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,783 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,784 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:57,791 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,792 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:57,804 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:57,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:57,814 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,815 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:57,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:57,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:57,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900704909] [2021-06-13 08:43:57,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900704909] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:57,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:57,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-06-13 08:43:57,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621576066] [2021-06-13 08:43:57,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-13 08:43:57,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:57,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-13 08:43:57,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-06-13 08:43:57,816 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 28 [2021-06-13 08:43:57,817 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 61 transitions, 658 flow. Second operand has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,817 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:57,817 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 28 [2021-06-13 08:43:57,817 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:57,963 INFO L129 PetriNetUnfolder]: 34/150 cut-off events. [2021-06-13 08:43:57,963 INFO L130 PetriNetUnfolder]: For 1232/1232 co-relation queries the response was YES. [2021-06-13 08:43:57,964 INFO L84 FinitePrefix]: Finished finitePrefix Result has 698 conditions, 150 events. 34/150 cut-off events. For 1232/1232 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 748 event pairs, 9 based on Foata normal form. 2/137 useless extension candidates. Maximal degree in co-relation 661. Up to 53 conditions per place. [2021-06-13 08:43:57,965 INFO L132 encePairwiseOnDemand]: 20/28 looper letters, 18 selfloop transitions, 28 changer transitions 2/66 dead transitions. [2021-06-13 08:43:57,965 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 66 transitions, 819 flow [2021-06-13 08:43:57,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 08:43:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 08:43:57,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2021-06-13 08:43:57,966 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-13 08:43:57,966 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 198 transitions. [2021-06-13 08:43:57,966 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 198 transitions. [2021-06-13 08:43:57,966 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:57,966 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 198 transitions. [2021-06-13 08:43:57,967 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 22.0) internal successors, (198), 9 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,968 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,968 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,968 INFO L185 Difference]: Start difference. First operand has 85 places, 61 transitions, 658 flow. Second operand 9 states and 198 transitions. [2021-06-13 08:43:57,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 66 transitions, 819 flow [2021-06-13 08:43:57,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 66 transitions, 708 flow, removed 11 selfloop flow, removed 10 redundant places. [2021-06-13 08:43:57,974 INFO L241 Difference]: Finished difference. Result has 82 places, 63 transitions, 645 flow [2021-06-13 08:43:57,974 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=557, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=645, PETRI_PLACES=82, PETRI_TRANSITIONS=63} [2021-06-13 08:43:57,974 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 55 predicate places. [2021-06-13 08:43:57,974 INFO L482 AbstractCegarLoop]: Abstraction has has 82 places, 63 transitions, 645 flow [2021-06-13 08:43:57,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 19.857142857142858) internal successors, (139), 7 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:57,974 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:57,975 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:57,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-06-13 08:43:57,975 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:57,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:57,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1928735747, now seen corresponding path program 1 times [2021-06-13 08:43:57,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:57,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652962894] [2021-06-13 08:43:57,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:57,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:57,999 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:57,999 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:58,000 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,000 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,005 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,005 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,023 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,034 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,036 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,045 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,045 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:58,054 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:58,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:58,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,066 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:58,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:58,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:58,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652962894] [2021-06-13 08:43:58,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652962894] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:58,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:58,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:43:58,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790465144] [2021-06-13 08:43:58,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:43:58,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:58,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:43:58,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:43:58,068 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:43:58,068 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 63 transitions, 645 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,068 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:58,069 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:43:58,069 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:58,294 INFO L129 PetriNetUnfolder]: 43/225 cut-off events. [2021-06-13 08:43:58,294 INFO L130 PetriNetUnfolder]: For 1571/1571 co-relation queries the response was YES. [2021-06-13 08:43:58,295 INFO L84 FinitePrefix]: Finished finitePrefix Result has 925 conditions, 225 events. 43/225 cut-off events. For 1571/1571 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1356 event pairs, 0 based on Foata normal form. 3/215 useless extension candidates. Maximal degree in co-relation 874. Up to 50 conditions per place. [2021-06-13 08:43:58,296 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 51 selfloop transitions, 23 changer transitions 4/95 dead transitions. [2021-06-13 08:43:58,296 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 95 transitions, 1168 flow [2021-06-13 08:43:58,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-13 08:43:58,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-13 08:43:58,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 237 transitions. [2021-06-13 08:43:58,297 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7694805194805194 [2021-06-13 08:43:58,297 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 237 transitions. [2021-06-13 08:43:58,298 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 237 transitions. [2021-06-13 08:43:58,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:58,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 237 transitions. [2021-06-13 08:43:58,298 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 21.545454545454547) internal successors, (237), 11 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,299 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,299 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,299 INFO L185 Difference]: Start difference. First operand has 82 places, 63 transitions, 645 flow. Second operand 11 states and 237 transitions. [2021-06-13 08:43:58,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 95 transitions, 1168 flow [2021-06-13 08:43:58,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 95 transitions, 1056 flow, removed 31 selfloop flow, removed 8 redundant places. [2021-06-13 08:43:58,306 INFO L241 Difference]: Finished difference. Result has 88 places, 73 transitions, 777 flow [2021-06-13 08:43:58,306 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=571, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=777, PETRI_PLACES=88, PETRI_TRANSITIONS=73} [2021-06-13 08:43:58,307 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 61 predicate places. [2021-06-13 08:43:58,307 INFO L482 AbstractCegarLoop]: Abstraction has has 88 places, 73 transitions, 777 flow [2021-06-13 08:43:58,307 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,307 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:58,307 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:58,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2021-06-13 08:43:58,307 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:58,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:58,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1522621949, now seen corresponding path program 2 times [2021-06-13 08:43:58,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:58,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220576895] [2021-06-13 08:43:58,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:58,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:58,317 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:58,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,324 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,329 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:58,336 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,337 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:58,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:58,355 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:58,355 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:58,365 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,366 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:58,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:58,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:58,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220576895] [2021-06-13 08:43:58,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220576895] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:58,366 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:58,366 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:43:58,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535433138] [2021-06-13 08:43:58,367 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:43:58,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:58,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:43:58,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:43:58,367 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:43:58,368 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 73 transitions, 777 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,368 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:58,368 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:43:58,368 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:58,528 INFO L129 PetriNetUnfolder]: 43/230 cut-off events. [2021-06-13 08:43:58,529 INFO L130 PetriNetUnfolder]: For 1970/1977 co-relation queries the response was YES. [2021-06-13 08:43:58,530 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1037 conditions, 230 events. 43/230 cut-off events. For 1970/1977 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1398 event pairs, 0 based on Foata normal form. 2/216 useless extension candidates. Maximal degree in co-relation 975. Up to 47 conditions per place. [2021-06-13 08:43:58,531 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 38 selfloop transitions, 27 changer transitions 8/90 dead transitions. [2021-06-13 08:43:58,531 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 90 transitions, 1114 flow [2021-06-13 08:43:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 08:43:58,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 08:43:58,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2021-06-13 08:43:58,532 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.753968253968254 [2021-06-13 08:43:58,532 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 190 transitions. [2021-06-13 08:43:58,532 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 190 transitions. [2021-06-13 08:43:58,532 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:58,532 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 190 transitions. [2021-06-13 08:43:58,533 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.11111111111111) internal successors, (190), 9 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,533 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,534 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,534 INFO L185 Difference]: Start difference. First operand has 88 places, 73 transitions, 777 flow. Second operand 9 states and 190 transitions. [2021-06-13 08:43:58,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 90 transitions, 1114 flow [2021-06-13 08:43:58,541 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 90 transitions, 1076 flow, removed 9 selfloop flow, removed 4 redundant places. [2021-06-13 08:43:58,542 INFO L241 Difference]: Finished difference. Result has 94 places, 73 transitions, 826 flow [2021-06-13 08:43:58,543 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=751, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=826, PETRI_PLACES=94, PETRI_TRANSITIONS=73} [2021-06-13 08:43:58,543 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2021-06-13 08:43:58,543 INFO L482 AbstractCegarLoop]: Abstraction has has 94 places, 73 transitions, 826 flow [2021-06-13 08:43:58,543 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,543 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:58,543 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:58,543 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-06-13 08:43:58,544 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:58,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:58,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1266652379, now seen corresponding path program 3 times [2021-06-13 08:43:58,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:58,544 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663631624] [2021-06-13 08:43:58,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:58,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:58,553 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:58,554 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,554 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,559 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,559 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,565 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,565 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,573 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:58,582 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,582 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:58,592 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:58,592 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:58,602 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,602 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:58,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:58,602 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:58,603 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663631624] [2021-06-13 08:43:58,603 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663631624] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:58,603 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:58,603 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:43:58,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975563017] [2021-06-13 08:43:58,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:43:58,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:58,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:43:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:43:58,604 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:43:58,604 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 73 transitions, 826 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,604 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:58,604 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:43:58,604 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:58,773 INFO L129 PetriNetUnfolder]: 66/362 cut-off events. [2021-06-13 08:43:58,774 INFO L130 PetriNetUnfolder]: For 3619/3628 co-relation queries the response was YES. [2021-06-13 08:43:58,775 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1712 conditions, 362 events. 66/362 cut-off events. For 3619/3628 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 2632 event pairs, 4 based on Foata normal form. 4/341 useless extension candidates. Maximal degree in co-relation 1634. Up to 69 conditions per place. [2021-06-13 08:43:58,777 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 91 selfloop transitions, 15 changer transitions 11/134 dead transitions. [2021-06-13 08:43:58,777 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 1964 flow [2021-06-13 08:43:58,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:43:58,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:43:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2021-06-13 08:43:58,778 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-13 08:43:58,778 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 176 transitions. [2021-06-13 08:43:58,778 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 176 transitions. [2021-06-13 08:43:58,778 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:58,778 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 176 transitions. [2021-06-13 08:43:58,779 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.0) internal successors, (176), 8 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) [2021-06-13 08:43:58,779 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,780 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,780 INFO L185 Difference]: Start difference. First operand has 94 places, 73 transitions, 826 flow. Second operand 8 states and 176 transitions. [2021-06-13 08:43:58,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 1964 flow [2021-06-13 08:43:58,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 134 transitions, 1818 flow, removed 13 selfloop flow, removed 8 redundant places. [2021-06-13 08:43:58,792 INFO L241 Difference]: Finished difference. Result has 96 places, 82 transitions, 987 flow [2021-06-13 08:43:58,793 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=764, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=987, PETRI_PLACES=96, PETRI_TRANSITIONS=82} [2021-06-13 08:43:58,793 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 69 predicate places. [2021-06-13 08:43:58,793 INFO L482 AbstractCegarLoop]: Abstraction has has 96 places, 82 transitions, 987 flow [2021-06-13 08:43:58,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,793 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:58,793 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:58,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-06-13 08:43:58,793 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:58,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1459440643, now seen corresponding path program 4 times [2021-06-13 08:43:58,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:58,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595690795] [2021-06-13 08:43:58,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:58,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:58,805 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,805 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:58,806 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,806 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,811 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,812 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,817 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,817 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,824 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,824 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:58,832 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,832 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:58,841 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:58,842 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:58,851 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:58,852 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:58,852 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:58,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595690795] [2021-06-13 08:43:58,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595690795] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:58,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:58,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:43:58,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431658449] [2021-06-13 08:43:58,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:43:58,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:58,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:43:58,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:43:58,853 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:43:58,853 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 82 transitions, 987 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:58,853 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:58,854 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:43:58,854 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:59,055 INFO L129 PetriNetUnfolder]: 73/409 cut-off events. [2021-06-13 08:43:59,055 INFO L130 PetriNetUnfolder]: For 4270/4281 co-relation queries the response was YES. [2021-06-13 08:43:59,057 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1972 conditions, 409 events. 73/409 cut-off events. For 4270/4281 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3098 event pairs, 5 based on Foata normal form. 4/384 useless extension candidates. Maximal degree in co-relation 1883. Up to 135 conditions per place. [2021-06-13 08:43:59,059 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 61 selfloop transitions, 33 changer transitions 4/115 dead transitions. [2021-06-13 08:43:59,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 115 transitions, 1666 flow [2021-06-13 08:43:59,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 08:43:59,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 08:43:59,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2021-06-13 08:43:59,060 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7738095238095238 [2021-06-13 08:43:59,060 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 195 transitions. [2021-06-13 08:43:59,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 195 transitions. [2021-06-13 08:43:59,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:59,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 195 transitions. [2021-06-13 08:43:59,061 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.666666666666668) internal successors, (195), 9 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,062 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,062 INFO L185 Difference]: Start difference. First operand has 96 places, 82 transitions, 987 flow. Second operand 9 states and 195 transitions. [2021-06-13 08:43:59,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 115 transitions, 1666 flow [2021-06-13 08:43:59,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 115 transitions, 1651 flow, removed 6 selfloop flow, removed 3 redundant places. [2021-06-13 08:43:59,076 INFO L241 Difference]: Finished difference. Result has 105 places, 94 transitions, 1321 flow [2021-06-13 08:43:59,076 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=982, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1321, PETRI_PLACES=105, PETRI_TRANSITIONS=94} [2021-06-13 08:43:59,076 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 78 predicate places. [2021-06-13 08:43:59,076 INFO L482 AbstractCegarLoop]: Abstraction has has 105 places, 94 transitions, 1321 flow [2021-06-13 08:43:59,076 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,076 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:59,076 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:59,076 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-06-13 08:43:59,077 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:59,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:59,077 INFO L82 PathProgramCache]: Analyzing trace with hash 110369763, now seen corresponding path program 5 times [2021-06-13 08:43:59,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:59,077 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895377772] [2021-06-13 08:43:59,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:59,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:59,086 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,086 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:59,087 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,087 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,091 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,092 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,097 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,098 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,104 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,105 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,112 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,113 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:59,122 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:59,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:59,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,136 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:59,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:59,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:59,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895377772] [2021-06-13 08:43:59,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895377772] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:59,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:59,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:43:59,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255549542] [2021-06-13 08:43:59,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:43:59,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:59,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:43:59,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:43:59,138 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:43:59,138 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 94 transitions, 1321 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,138 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:59,138 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:43:59,138 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:59,320 INFO L129 PetriNetUnfolder]: 71/434 cut-off events. [2021-06-13 08:43:59,320 INFO L130 PetriNetUnfolder]: For 5647/5662 co-relation queries the response was YES. [2021-06-13 08:43:59,322 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2208 conditions, 434 events. 71/434 cut-off events. For 5647/5662 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3407 event pairs, 8 based on Foata normal form. 10/416 useless extension candidates. Maximal degree in co-relation 2115. Up to 102 conditions per place. [2021-06-13 08:43:59,324 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 90 selfloop transitions, 19 changer transitions 18/144 dead transitions. [2021-06-13 08:43:59,324 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 144 transitions, 2336 flow [2021-06-13 08:43:59,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:43:59,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:43:59,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2021-06-13 08:43:59,325 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7946428571428571 [2021-06-13 08:43:59,325 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 178 transitions. [2021-06-13 08:43:59,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 178 transitions. [2021-06-13 08:43:59,326 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:59,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 178 transitions. [2021-06-13 08:43:59,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.25) internal successors, (178), 8 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,327 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,327 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,327 INFO L185 Difference]: Start difference. First operand has 105 places, 94 transitions, 1321 flow. Second operand 8 states and 178 transitions. [2021-06-13 08:43:59,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 144 transitions, 2336 flow [2021-06-13 08:43:59,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 144 transitions, 2239 flow, removed 10 selfloop flow, removed 4 redundant places. [2021-06-13 08:43:59,348 INFO L241 Difference]: Finished difference. Result has 111 places, 99 transitions, 1427 flow [2021-06-13 08:43:59,348 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1256, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1427, PETRI_PLACES=111, PETRI_TRANSITIONS=99} [2021-06-13 08:43:59,348 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 84 predicate places. [2021-06-13 08:43:59,348 INFO L482 AbstractCegarLoop]: Abstraction has has 111 places, 99 transitions, 1427 flow [2021-06-13 08:43:59,348 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,348 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:59,349 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:59,349 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-13 08:43:59,349 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:59,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:59,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1292151479, now seen corresponding path program 6 times [2021-06-13 08:43:59,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:59,349 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438846456] [2021-06-13 08:43:59,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:59,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:59,359 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,359 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:59,360 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,360 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,364 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,368 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,373 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,374 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,380 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,380 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:59,389 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,389 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:59,398 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:59,399 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:59,409 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,409 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:59,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:59,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438846456] [2021-06-13 08:43:59,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438846456] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:59,410 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:59,410 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:43:59,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528243208] [2021-06-13 08:43:59,410 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:43:59,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:59,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:43:59,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:43:59,411 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:43:59,411 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 99 transitions, 1427 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,411 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:59,411 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:43:59,411 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:59,597 INFO L129 PetriNetUnfolder]: 64/394 cut-off events. [2021-06-13 08:43:59,597 INFO L130 PetriNetUnfolder]: For 5691/5707 co-relation queries the response was YES. [2021-06-13 08:43:59,599 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2081 conditions, 394 events. 64/394 cut-off events. For 5691/5707 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 2998 event pairs, 4 based on Foata normal form. 9/376 useless extension candidates. Maximal degree in co-relation 1985. Up to 87 conditions per place. [2021-06-13 08:43:59,601 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 77 selfloop transitions, 30 changer transitions 6/130 dead transitions. [2021-06-13 08:43:59,601 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 130 transitions, 2155 flow [2021-06-13 08:43:59,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 08:43:59,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 08:43:59,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2021-06-13 08:43:59,602 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7777777777777778 [2021-06-13 08:43:59,602 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 196 transitions. [2021-06-13 08:43:59,602 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 196 transitions. [2021-06-13 08:43:59,602 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:59,602 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 196 transitions. [2021-06-13 08:43:59,603 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.77777777777778) internal successors, (196), 9 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,603 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,604 INFO L185 Difference]: Start difference. First operand has 111 places, 99 transitions, 1427 flow. Second operand 9 states and 196 transitions. [2021-06-13 08:43:59,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 130 transitions, 2155 flow [2021-06-13 08:43:59,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 130 transitions, 2112 flow, removed 12 selfloop flow, removed 4 redundant places. [2021-06-13 08:43:59,625 INFO L241 Difference]: Finished difference. Result has 121 places, 107 transitions, 1661 flow [2021-06-13 08:43:59,625 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1388, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1661, PETRI_PLACES=121, PETRI_TRANSITIONS=107} [2021-06-13 08:43:59,625 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 94 predicate places. [2021-06-13 08:43:59,625 INFO L482 AbstractCegarLoop]: Abstraction has has 121 places, 107 transitions, 1661 flow [2021-06-13 08:43:59,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,625 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:43:59,626 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:43:59,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-06-13 08:43:59,626 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:43:59,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:43:59,626 INFO L82 PathProgramCache]: Analyzing trace with hash -2018730311, now seen corresponding path program 7 times [2021-06-13 08:43:59,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:43:59,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458502642] [2021-06-13 08:43:59,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:43:59,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:43:59,637 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,637 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:59,638 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,638 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,642 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,649 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,649 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,657 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,657 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:43:59,665 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,666 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:43:59,676 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:43:59,676 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:43:59,687 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:43:59,688 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:43:59,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:43:59,688 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:43:59,688 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458502642] [2021-06-13 08:43:59,688 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458502642] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:43:59,688 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:43:59,688 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:43:59,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156641967] [2021-06-13 08:43:59,689 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:43:59,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:43:59,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:43:59,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:43:59,689 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:43:59,690 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 107 transitions, 1661 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,690 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:43:59,690 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:43:59,690 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:43:59,967 INFO L129 PetriNetUnfolder]: 51/446 cut-off events. [2021-06-13 08:43:59,968 INFO L130 PetriNetUnfolder]: For 6681/6699 co-relation queries the response was YES. [2021-06-13 08:43:59,970 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2323 conditions, 446 events. 51/446 cut-off events. For 6681/6699 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 3751 event pairs, 5 based on Foata normal form. 10/430 useless extension candidates. Maximal degree in co-relation 2201. Up to 74 conditions per place. [2021-06-13 08:43:59,972 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 80 selfloop transitions, 42 changer transitions 13/152 dead transitions. [2021-06-13 08:43:59,972 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 152 transitions, 2649 flow [2021-06-13 08:43:59,972 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-13 08:43:59,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-13 08:43:59,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 264 transitions. [2021-06-13 08:43:59,973 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-13 08:43:59,973 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 264 transitions. [2021-06-13 08:43:59,973 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 264 transitions. [2021-06-13 08:43:59,973 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:43:59,973 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 264 transitions. [2021-06-13 08:43:59,974 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 22.0) internal successors, (264), 12 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,974 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,974 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:43:59,975 INFO L185 Difference]: Start difference. First operand has 121 places, 107 transitions, 1661 flow. Second operand 12 states and 264 transitions. [2021-06-13 08:43:59,975 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 152 transitions, 2649 flow [2021-06-13 08:43:59,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 152 transitions, 2540 flow, removed 31 selfloop flow, removed 4 redundant places. [2021-06-13 08:44:00,001 INFO L241 Difference]: Finished difference. Result has 135 places, 121 transitions, 2032 flow [2021-06-13 08:44:00,001 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=2032, PETRI_PLACES=135, PETRI_TRANSITIONS=121} [2021-06-13 08:44:00,001 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 108 predicate places. [2021-06-13 08:44:00,001 INFO L482 AbstractCegarLoop]: Abstraction has has 135 places, 121 transitions, 2032 flow [2021-06-13 08:44:00,002 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,002 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:00,002 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:00,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-06-13 08:44:00,002 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:00,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:00,003 INFO L82 PathProgramCache]: Analyzing trace with hash 438547741, now seen corresponding path program 8 times [2021-06-13 08:44:00,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:00,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138051644] [2021-06-13 08:44:00,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:00,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:00,010 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,011 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:00,011 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,012 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,016 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,016 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,028 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,030 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,037 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,037 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:00,047 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:00,047 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:00,056 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,057 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:00,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:00,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:00,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138051644] [2021-06-13 08:44:00,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138051644] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:00,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:00,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:00,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305345513] [2021-06-13 08:44:00,058 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:00,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:00,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:00,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:00,058 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:00,059 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 121 transitions, 2032 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,059 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:00,059 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:00,059 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:00,243 INFO L129 PetriNetUnfolder]: 48/391 cut-off events. [2021-06-13 08:44:00,243 INFO L130 PetriNetUnfolder]: For 6987/7007 co-relation queries the response was YES. [2021-06-13 08:44:00,245 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2217 conditions, 391 events. 48/391 cut-off events. For 6987/7007 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3121 event pairs, 5 based on Foata normal form. 12/377 useless extension candidates. Maximal degree in co-relation 2080. Up to 100 conditions per place. [2021-06-13 08:44:00,247 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 85 selfloop transitions, 11 changer transitions 21/134 dead transitions. [2021-06-13 08:44:00,247 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 134 transitions, 2514 flow [2021-06-13 08:44:00,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:00,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:00,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2021-06-13 08:44:00,248 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7857142857142857 [2021-06-13 08:44:00,248 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 176 transitions. [2021-06-13 08:44:00,248 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 176 transitions. [2021-06-13 08:44:00,248 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:00,248 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 176 transitions. [2021-06-13 08:44:00,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 22.0) internal successors, (176), 8 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) [2021-06-13 08:44:00,249 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,249 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,249 INFO L185 Difference]: Start difference. First operand has 135 places, 121 transitions, 2032 flow. Second operand 8 states and 176 transitions. [2021-06-13 08:44:00,249 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 134 transitions, 2514 flow [2021-06-13 08:44:00,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 134 transitions, 2432 flow, removed 38 selfloop flow, removed 3 redundant places. [2021-06-13 08:44:00,282 INFO L241 Difference]: Finished difference. Result has 139 places, 105 transitions, 1698 flow [2021-06-13 08:44:00,282 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1962, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1698, PETRI_PLACES=139, PETRI_TRANSITIONS=105} [2021-06-13 08:44:00,282 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2021-06-13 08:44:00,282 INFO L482 AbstractCegarLoop]: Abstraction has has 139 places, 105 transitions, 1698 flow [2021-06-13 08:44:00,282 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,283 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:00,283 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:00,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2021-06-13 08:44:00,283 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:00,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:00,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1696629067, now seen corresponding path program 9 times [2021-06-13 08:44:00,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:00,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235924495] [2021-06-13 08:44:00,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:00,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:00,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,292 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:00,292 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,293 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,298 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,304 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,304 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,311 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:00,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:00,329 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:00,329 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:00,338 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,339 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:00,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:00,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:00,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235924495] [2021-06-13 08:44:00,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235924495] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:00,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:00,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:00,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939428] [2021-06-13 08:44:00,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:00,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:00,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:00,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:00,340 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:00,341 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 105 transitions, 1698 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,341 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:00,341 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:00,341 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:00,614 INFO L129 PetriNetUnfolder]: 42/339 cut-off events. [2021-06-13 08:44:00,615 INFO L130 PetriNetUnfolder]: For 5983/5987 co-relation queries the response was YES. [2021-06-13 08:44:00,617 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1905 conditions, 339 events. 42/339 cut-off events. For 5983/5987 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 2589 event pairs, 5 based on Foata normal form. 7/323 useless extension candidates. Maximal degree in co-relation 1807. Up to 73 conditions per place. [2021-06-13 08:44:00,619 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 59 selfloop transitions, 25 changer transitions 24/125 dead transitions. [2021-06-13 08:44:00,619 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 125 transitions, 2275 flow [2021-06-13 08:44:00,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-13 08:44:00,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-13 08:44:00,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 256 transitions. [2021-06-13 08:44:00,620 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7619047619047619 [2021-06-13 08:44:00,621 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 256 transitions. [2021-06-13 08:44:00,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 256 transitions. [2021-06-13 08:44:00,621 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:00,621 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 256 transitions. [2021-06-13 08:44:00,622 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 21.333333333333332) internal successors, (256), 12 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,622 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,622 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,622 INFO L185 Difference]: Start difference. First operand has 139 places, 105 transitions, 1698 flow. Second operand 12 states and 256 transitions. [2021-06-13 08:44:00,622 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 125 transitions, 2275 flow [2021-06-13 08:44:00,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 125 transitions, 2146 flow, removed 43 selfloop flow, removed 10 redundant places. [2021-06-13 08:44:00,651 INFO L241 Difference]: Finished difference. Result has 142 places, 93 transitions, 1427 flow [2021-06-13 08:44:00,651 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1601, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1427, PETRI_PLACES=142, PETRI_TRANSITIONS=93} [2021-06-13 08:44:00,651 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 115 predicate places. [2021-06-13 08:44:00,651 INFO L482 AbstractCegarLoop]: Abstraction has has 142 places, 93 transitions, 1427 flow [2021-06-13 08:44:00,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,652 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:00,652 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:00,652 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2021-06-13 08:44:00,653 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:00,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:00,653 INFO L82 PathProgramCache]: Analyzing trace with hash 758616527, now seen corresponding path program 10 times [2021-06-13 08:44:00,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:00,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453717597] [2021-06-13 08:44:00,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:00,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:00,668 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,669 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:00,669 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,670 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,675 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,675 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,682 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,683 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,690 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,690 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:00,700 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:00,712 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:00,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:00,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:00,748 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:00,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:00,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:00,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453717597] [2021-06-13 08:44:00,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453717597] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:00,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:00,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:00,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54682800] [2021-06-13 08:44:00,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:00,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:00,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:00,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:00,751 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:00,751 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 93 transitions, 1427 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:00,751 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:00,751 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:00,751 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:01,027 INFO L129 PetriNetUnfolder]: 38/274 cut-off events. [2021-06-13 08:44:01,028 INFO L130 PetriNetUnfolder]: For 4717/4725 co-relation queries the response was YES. [2021-06-13 08:44:01,029 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1552 conditions, 274 events. 38/274 cut-off events. For 4717/4725 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 1908 event pairs, 5 based on Foata normal form. 6/261 useless extension candidates. Maximal degree in co-relation 1458. Up to 73 conditions per place. [2021-06-13 08:44:01,031 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 54 selfloop transitions, 19 changer transitions 16/106 dead transitions. [2021-06-13 08:44:01,031 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 106 transitions, 1824 flow [2021-06-13 08:44:01,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-13 08:44:01,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-06-13 08:44:01,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 255 transitions. [2021-06-13 08:44:01,032 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7589285714285714 [2021-06-13 08:44:01,032 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 255 transitions. [2021-06-13 08:44:01,032 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 255 transitions. [2021-06-13 08:44:01,032 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:01,032 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 255 transitions. [2021-06-13 08:44:01,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 21.25) internal successors, (255), 12 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,034 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 28.0) internal successors, (364), 13 states have internal predecessors, (364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,034 INFO L185 Difference]: Start difference. First operand has 142 places, 93 transitions, 1427 flow. Second operand 12 states and 255 transitions. [2021-06-13 08:44:01,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 106 transitions, 1824 flow [2021-06-13 08:44:01,052 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 106 transitions, 1706 flow, removed 47 selfloop flow, removed 9 redundant places. [2021-06-13 08:44:01,058 INFO L241 Difference]: Finished difference. Result has 139 places, 83 transitions, 1198 flow [2021-06-13 08:44:01,058 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1329, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=1198, PETRI_PLACES=139, PETRI_TRANSITIONS=83} [2021-06-13 08:44:01,059 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 112 predicate places. [2021-06-13 08:44:01,059 INFO L482 AbstractCegarLoop]: Abstraction has has 139 places, 83 transitions, 1198 flow [2021-06-13 08:44:01,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,059 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:01,059 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:01,059 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2021-06-13 08:44:01,059 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:01,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:01,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1936417295, now seen corresponding path program 11 times [2021-06-13 08:44:01,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:01,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112634154] [2021-06-13 08:44:01,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:01,068 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,069 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:01,069 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,070 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,075 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,075 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,081 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,081 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:01,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,091 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:01,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:01,109 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:01,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:01,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:01,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:01,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:01,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112634154] [2021-06-13 08:44:01,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112634154] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:01,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:01,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:01,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335821375] [2021-06-13 08:44:01,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:01,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:01,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:01,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:01,121 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:01,122 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 83 transitions, 1198 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:01,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:01,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:01,287 INFO L129 PetriNetUnfolder]: 35/230 cut-off events. [2021-06-13 08:44:01,287 INFO L130 PetriNetUnfolder]: For 3395/3404 co-relation queries the response was YES. [2021-06-13 08:44:01,288 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1259 conditions, 230 events. 35/230 cut-off events. For 3395/3404 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 1451 event pairs, 0 based on Foata normal form. 3/216 useless extension candidates. Maximal degree in co-relation 1203. Up to 64 conditions per place. [2021-06-13 08:44:01,289 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 53 selfloop transitions, 22 changer transitions 8/100 dead transitions. [2021-06-13 08:44:01,290 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 100 transitions, 1675 flow [2021-06-13 08:44:01,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-13 08:44:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2021-06-13 08:44:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2021-06-13 08:44:01,291 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-06-13 08:44:01,291 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 189 transitions. [2021-06-13 08:44:01,291 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 189 transitions. [2021-06-13 08:44:01,291 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:01,291 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 189 transitions. [2021-06-13 08:44:01,291 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 21.0) internal successors, (189), 9 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,292 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,292 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 28.0) internal successors, (280), 10 states have internal predecessors, (280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,292 INFO L185 Difference]: Start difference. First operand has 139 places, 83 transitions, 1198 flow. Second operand 9 states and 189 transitions. [2021-06-13 08:44:01,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 100 transitions, 1675 flow [2021-06-13 08:44:01,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 100 transitions, 1556 flow, removed 33 selfloop flow, removed 15 redundant places. [2021-06-13 08:44:01,307 INFO L241 Difference]: Finished difference. Result has 123 places, 83 transitions, 1180 flow [2021-06-13 08:44:01,307 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1121, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1180, PETRI_PLACES=123, PETRI_TRANSITIONS=83} [2021-06-13 08:44:01,307 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 96 predicate places. [2021-06-13 08:44:01,307 INFO L482 AbstractCegarLoop]: Abstraction has has 123 places, 83 transitions, 1180 flow [2021-06-13 08:44:01,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,308 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:01,308 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:01,308 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-13 08:44:01,308 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:01,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:01,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1734651825, now seen corresponding path program 12 times [2021-06-13 08:44:01,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:01,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281815066] [2021-06-13 08:44:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:01,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:01,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:01,323 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,323 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,328 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,335 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,336 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,344 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,344 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:01,352 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:01,362 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:01,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:01,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,373 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:01,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:01,373 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:01,373 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281815066] [2021-06-13 08:44:01,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281815066] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:01,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:01,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:01,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527264254] [2021-06-13 08:44:01,374 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:01,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:01,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:01,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:01,375 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:01,375 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 83 transitions, 1180 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,375 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:01,375 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:01,375 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:01,520 INFO L129 PetriNetUnfolder]: 33/216 cut-off events. [2021-06-13 08:44:01,520 INFO L130 PetriNetUnfolder]: For 3018/3024 co-relation queries the response was YES. [2021-06-13 08:44:01,521 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1172 conditions, 216 events. 33/216 cut-off events. For 3018/3024 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 1334 event pairs, 0 based on Foata normal form. 2/202 useless extension candidates. Maximal degree in co-relation 1122. Up to 73 conditions per place. [2021-06-13 08:44:01,522 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 54 selfloop transitions, 17 changer transitions 9/97 dead transitions. [2021-06-13 08:44:01,522 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 97 transitions, 1564 flow [2021-06-13 08:44:01,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:01,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:01,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2021-06-13 08:44:01,523 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7633928571428571 [2021-06-13 08:44:01,523 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 171 transitions. [2021-06-13 08:44:01,523 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 171 transitions. [2021-06-13 08:44:01,523 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:01,523 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 171 transitions. [2021-06-13 08:44:01,524 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.375) internal successors, (171), 8 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,524 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,524 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,524 INFO L185 Difference]: Start difference. First operand has 123 places, 83 transitions, 1180 flow. Second operand 8 states and 171 transitions. [2021-06-13 08:44:01,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 97 transitions, 1564 flow [2021-06-13 08:44:01,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 97 transitions, 1506 flow, removed 6 selfloop flow, removed 8 redundant places. [2021-06-13 08:44:01,538 INFO L241 Difference]: Finished difference. Result has 122 places, 80 transitions, 1130 flow [2021-06-13 08:44:01,538 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1130, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1130, PETRI_PLACES=122, PETRI_TRANSITIONS=80} [2021-06-13 08:44:01,538 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 95 predicate places. [2021-06-13 08:44:01,538 INFO L482 AbstractCegarLoop]: Abstraction has has 122 places, 80 transitions, 1130 flow [2021-06-13 08:44:01,538 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,538 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:01,538 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:01,538 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2021-06-13 08:44:01,538 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:01,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:01,539 INFO L82 PathProgramCache]: Analyzing trace with hash -55110085, now seen corresponding path program 13 times [2021-06-13 08:44:01,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:01,539 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328663139] [2021-06-13 08:44:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:01,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:01,546 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,546 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:01,546 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,547 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,551 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,552 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,564 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,564 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,572 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,572 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:01,581 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:01,581 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:01,591 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,591 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:01,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:01,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:01,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328663139] [2021-06-13 08:44:01,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328663139] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:01,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:01,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:01,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262658974] [2021-06-13 08:44:01,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:01,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:01,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:01,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:01,593 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:01,593 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 80 transitions, 1130 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,593 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:01,593 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:01,593 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:01,802 INFO L129 PetriNetUnfolder]: 32/195 cut-off events. [2021-06-13 08:44:01,803 INFO L130 PetriNetUnfolder]: For 2942/2950 co-relation queries the response was YES. [2021-06-13 08:44:01,804 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1083 conditions, 195 events. 32/195 cut-off events. For 2942/2950 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1151 event pairs, 0 based on Foata normal form. 5/185 useless extension candidates. Maximal degree in co-relation 1033. Up to 65 conditions per place. [2021-06-13 08:44:01,805 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 40 selfloop transitions, 17 changer transitions 17/91 dead transitions. [2021-06-13 08:44:01,805 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 91 transitions, 1470 flow [2021-06-13 08:44:01,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-13 08:44:01,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2021-06-13 08:44:01,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 228 transitions. [2021-06-13 08:44:01,806 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7402597402597403 [2021-06-13 08:44:01,806 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 228 transitions. [2021-06-13 08:44:01,807 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 228 transitions. [2021-06-13 08:44:01,807 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:01,807 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 228 transitions. [2021-06-13 08:44:01,807 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 20.727272727272727) internal successors, (228), 11 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,809 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,809 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 28.0) internal successors, (336), 12 states have internal predecessors, (336), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,809 INFO L185 Difference]: Start difference. First operand has 122 places, 80 transitions, 1130 flow. Second operand 11 states and 228 transitions. [2021-06-13 08:44:01,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 91 transitions, 1470 flow [2021-06-13 08:44:01,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 91 transitions, 1382 flow, removed 14 selfloop flow, removed 11 redundant places. [2021-06-13 08:44:01,821 INFO L241 Difference]: Finished difference. Result has 120 places, 68 transitions, 936 flow [2021-06-13 08:44:01,821 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1055, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=936, PETRI_PLACES=120, PETRI_TRANSITIONS=68} [2021-06-13 08:44:01,821 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 93 predicate places. [2021-06-13 08:44:01,821 INFO L482 AbstractCegarLoop]: Abstraction has has 120 places, 68 transitions, 936 flow [2021-06-13 08:44:01,821 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,821 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:01,821 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:01,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2021-06-13 08:44:01,821 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:01,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:01,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1856567209, now seen corresponding path program 14 times [2021-06-13 08:44:01,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:01,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [627866991] [2021-06-13 08:44:01,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:01,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:01,843 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,843 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:01,844 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,844 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,849 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,849 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,854 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,854 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:01,861 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,861 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:01,868 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:01,877 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:01,878 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:01,887 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:01,887 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:01,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:01,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:01,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [627866991] [2021-06-13 08:44:01,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [627866991] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:01,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:01,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:01,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492847557] [2021-06-13 08:44:01,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:01,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:01,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:01,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:01,889 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:01,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 68 transitions, 936 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:01,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:01,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:01,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:02,030 INFO L129 PetriNetUnfolder]: 31/184 cut-off events. [2021-06-13 08:44:02,030 INFO L130 PetriNetUnfolder]: For 2668/2674 co-relation queries the response was YES. [2021-06-13 08:44:02,031 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1047 conditions, 184 events. 31/184 cut-off events. For 2668/2674 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1063 event pairs, 2 based on Foata normal form. 4/173 useless extension candidates. Maximal degree in co-relation 1001. Up to 41 conditions per place. [2021-06-13 08:44:02,032 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 42 selfloop transitions, 11 changer transitions 19/89 dead transitions. [2021-06-13 08:44:02,032 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 89 transitions, 1417 flow [2021-06-13 08:44:02,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:02,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:02,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2021-06-13 08:44:02,033 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-06-13 08:44:02,033 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 168 transitions. [2021-06-13 08:44:02,033 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 168 transitions. [2021-06-13 08:44:02,033 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:02,033 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 168 transitions. [2021-06-13 08:44:02,034 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,034 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,034 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,034 INFO L185 Difference]: Start difference. First operand has 120 places, 68 transitions, 936 flow. Second operand 8 states and 168 transitions. [2021-06-13 08:44:02,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 89 transitions, 1417 flow [2021-06-13 08:44:02,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 89 transitions, 1177 flow, removed 30 selfloop flow, removed 22 redundant places. [2021-06-13 08:44:02,044 INFO L241 Difference]: Finished difference. Result has 94 places, 63 transitions, 751 flow [2021-06-13 08:44:02,044 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=760, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=751, PETRI_PLACES=94, PETRI_TRANSITIONS=63} [2021-06-13 08:44:02,044 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 67 predicate places. [2021-06-13 08:44:02,044 INFO L482 AbstractCegarLoop]: Abstraction has has 94 places, 63 transitions, 751 flow [2021-06-13 08:44:02,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,044 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:02,044 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:02,044 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-06-13 08:44:02,045 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:02,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:02,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1835821347, now seen corresponding path program 15 times [2021-06-13 08:44:02,045 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:02,045 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743943704] [2021-06-13 08:44:02,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:02,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:02,053 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,054 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,054 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,055 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,060 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,061 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,066 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,067 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,074 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,082 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:02,092 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:02,093 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:02,102 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,103 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:02,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:02,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743943704] [2021-06-13 08:44:02,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743943704] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:02,103 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:02,103 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:02,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363230562] [2021-06-13 08:44:02,104 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:02,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:02,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:02,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:02,105 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:02,105 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 63 transitions, 751 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,105 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:02,105 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:02,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:02,243 INFO L129 PetriNetUnfolder]: 22/174 cut-off events. [2021-06-13 08:44:02,244 INFO L130 PetriNetUnfolder]: For 1901/1916 co-relation queries the response was YES. [2021-06-13 08:44:02,244 INFO L84 FinitePrefix]: Finished finitePrefix Result has 867 conditions, 174 events. 22/174 cut-off events. For 1901/1916 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1000 event pairs, 1 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 830. Up to 46 conditions per place. [2021-06-13 08:44:02,245 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 32 selfloop transitions, 22 changer transitions 3/74 dead transitions. [2021-06-13 08:44:02,245 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 74 transitions, 1033 flow [2021-06-13 08:44:02,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:02,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2021-06-13 08:44:02,246 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7455357142857143 [2021-06-13 08:44:02,246 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 167 transitions. [2021-06-13 08:44:02,246 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 167 transitions. [2021-06-13 08:44:02,246 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:02,246 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 167 transitions. [2021-06-13 08:44:02,247 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.875) internal successors, (167), 8 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,247 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,247 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,247 INFO L185 Difference]: Start difference. First operand has 94 places, 63 transitions, 751 flow. Second operand 8 states and 167 transitions. [2021-06-13 08:44:02,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 74 transitions, 1033 flow [2021-06-13 08:44:02,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 74 transitions, 1007 flow, removed 11 selfloop flow, removed 4 redundant places. [2021-06-13 08:44:02,255 INFO L241 Difference]: Finished difference. Result has 98 places, 67 transitions, 876 flow [2021-06-13 08:44:02,255 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=731, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=876, PETRI_PLACES=98, PETRI_TRANSITIONS=67} [2021-06-13 08:44:02,255 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 71 predicate places. [2021-06-13 08:44:02,255 INFO L482 AbstractCegarLoop]: Abstraction has has 98 places, 67 transitions, 876 flow [2021-06-13 08:44:02,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,256 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:02,256 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:02,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2021-06-13 08:44:02,256 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:02,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:02,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1623444605, now seen corresponding path program 16 times [2021-06-13 08:44:02,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:02,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163468324] [2021-06-13 08:44:02,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:02,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:02,265 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,266 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,266 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,271 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,271 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,276 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,277 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,283 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,283 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,291 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:02,300 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:02,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:02,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:02,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:02,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163468324] [2021-06-13 08:44:02,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163468324] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:02,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:02,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:02,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857776546] [2021-06-13 08:44:02,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:02,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:02,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:02,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:02,313 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:02,313 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 67 transitions, 876 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,313 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:02,313 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:02,314 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:02,452 INFO L129 PetriNetUnfolder]: 19/198 cut-off events. [2021-06-13 08:44:02,452 INFO L130 PetriNetUnfolder]: For 2294/2304 co-relation queries the response was YES. [2021-06-13 08:44:02,453 INFO L84 FinitePrefix]: Finished finitePrefix Result has 983 conditions, 198 events. 19/198 cut-off events. For 2294/2304 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1239 event pairs, 2 based on Foata normal form. 5/190 useless extension candidates. Maximal degree in co-relation 944. Up to 33 conditions per place. [2021-06-13 08:44:02,454 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 35 selfloop transitions, 25 changer transitions 3/80 dead transitions. [2021-06-13 08:44:02,454 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 80 transitions, 1197 flow [2021-06-13 08:44:02,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:02,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:02,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2021-06-13 08:44:02,455 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7544642857142857 [2021-06-13 08:44:02,455 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 169 transitions. [2021-06-13 08:44:02,455 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 169 transitions. [2021-06-13 08:44:02,455 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:02,455 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 169 transitions. [2021-06-13 08:44:02,455 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.125) internal successors, (169), 8 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,456 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,456 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,456 INFO L185 Difference]: Start difference. First operand has 98 places, 67 transitions, 876 flow. Second operand 8 states and 169 transitions. [2021-06-13 08:44:02,456 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 80 transitions, 1197 flow [2021-06-13 08:44:02,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 80 transitions, 1154 flow, removed 4 selfloop flow, removed 5 redundant places. [2021-06-13 08:44:02,465 INFO L241 Difference]: Finished difference. Result has 103 places, 73 transitions, 1042 flow [2021-06-13 08:44:02,465 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=843, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1042, PETRI_PLACES=103, PETRI_TRANSITIONS=73} [2021-06-13 08:44:02,466 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 76 predicate places. [2021-06-13 08:44:02,466 INFO L482 AbstractCegarLoop]: Abstraction has has 103 places, 73 transitions, 1042 flow [2021-06-13 08:44:02,466 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,466 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:02,466 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:02,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2021-06-13 08:44:02,466 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:02,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:02,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1779347985, now seen corresponding path program 17 times [2021-06-13 08:44:02,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:02,467 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281480753] [2021-06-13 08:44:02,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:02,475 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,476 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,476 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,487 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,488 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,495 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,496 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,503 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,504 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:02,514 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:02,514 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:02,524 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,524 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:02,525 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:02,525 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281480753] [2021-06-13 08:44:02,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1281480753] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:02,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:02,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:02,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545293983] [2021-06-13 08:44:02,525 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:02,525 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:02,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:02,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:02,526 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:02,526 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 73 transitions, 1042 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,526 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:02,526 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:02,526 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:02,665 INFO L129 PetriNetUnfolder]: 19/184 cut-off events. [2021-06-13 08:44:02,665 INFO L130 PetriNetUnfolder]: For 2600/2617 co-relation queries the response was YES. [2021-06-13 08:44:02,666 INFO L84 FinitePrefix]: Finished finitePrefix Result has 993 conditions, 184 events. 19/184 cut-off events. For 2600/2617 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1118 event pairs, 2 based on Foata normal form. 13/184 useless extension candidates. Maximal degree in co-relation 951. Up to 32 conditions per place. [2021-06-13 08:44:02,667 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 25 selfloop transitions, 6 changer transitions 34/81 dead transitions. [2021-06-13 08:44:02,667 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 81 transitions, 1308 flow [2021-06-13 08:44:02,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:02,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:02,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2021-06-13 08:44:02,668 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.75 [2021-06-13 08:44:02,668 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 168 transitions. [2021-06-13 08:44:02,668 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 168 transitions. [2021-06-13 08:44:02,668 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:02,668 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 168 transitions. [2021-06-13 08:44:02,668 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 21.0) internal successors, (168), 8 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,669 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,669 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,669 INFO L185 Difference]: Start difference. First operand has 103 places, 73 transitions, 1042 flow. Second operand 8 states and 168 transitions. [2021-06-13 08:44:02,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 81 transitions, 1308 flow [2021-06-13 08:44:02,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 81 transitions, 1264 flow, removed 9 selfloop flow, removed 5 redundant places. [2021-06-13 08:44:02,679 INFO L241 Difference]: Finished difference. Result has 106 places, 46 transitions, 540 flow [2021-06-13 08:44:02,679 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=1004, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=540, PETRI_PLACES=106, PETRI_TRANSITIONS=46} [2021-06-13 08:44:02,680 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 79 predicate places. [2021-06-13 08:44:02,680 INFO L482 AbstractCegarLoop]: Abstraction has has 106 places, 46 transitions, 540 flow [2021-06-13 08:44:02,680 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,680 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:02,680 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:02,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2021-06-13 08:44:02,680 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:02,681 INFO L82 PathProgramCache]: Analyzing trace with hash -385329945, now seen corresponding path program 18 times [2021-06-13 08:44:02,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:02,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312565729] [2021-06-13 08:44:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:02,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:02,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,699 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,699 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,700 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,704 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,705 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,711 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,711 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,718 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,718 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,726 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,727 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:02,740 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:02,741 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:02,751 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,751 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:02,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:02,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312565729] [2021-06-13 08:44:02,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312565729] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:02,752 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:02,752 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:02,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42652101] [2021-06-13 08:44:02,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:02,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:02,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:02,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:02,753 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:02,753 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 46 transitions, 540 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,753 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:02,753 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:02,753 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:02,880 INFO L129 PetriNetUnfolder]: 11/99 cut-off events. [2021-06-13 08:44:02,880 INFO L130 PetriNetUnfolder]: For 1238/1244 co-relation queries the response was YES. [2021-06-13 08:44:02,881 INFO L84 FinitePrefix]: Finished finitePrefix Result has 535 conditions, 99 events. 11/99 cut-off events. For 1238/1244 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 419 event pairs, 0 based on Foata normal form. 4/100 useless extension candidates. Maximal degree in co-relation 493. Up to 27 conditions per place. [2021-06-13 08:44:02,881 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 15 selfloop transitions, 6 changer transitions 14/51 dead transitions. [2021-06-13 08:44:02,881 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 51 transitions, 695 flow [2021-06-13 08:44:02,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:02,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2021-06-13 08:44:02,882 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7276785714285714 [2021-06-13 08:44:02,882 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 163 transitions. [2021-06-13 08:44:02,882 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 163 transitions. [2021-06-13 08:44:02,883 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:02,883 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 163 transitions. [2021-06-13 08:44:02,883 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.375) internal successors, (163), 8 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,883 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,883 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,884 INFO L185 Difference]: Start difference. First operand has 106 places, 46 transitions, 540 flow. Second operand 8 states and 163 transitions. [2021-06-13 08:44:02,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 51 transitions, 695 flow [2021-06-13 08:44:02,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 51 transitions, 564 flow, removed 37 selfloop flow, removed 20 redundant places. [2021-06-13 08:44:02,888 INFO L241 Difference]: Finished difference. Result has 85 places, 35 transitions, 301 flow [2021-06-13 08:44:02,888 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=301, PETRI_PLACES=85, PETRI_TRANSITIONS=35} [2021-06-13 08:44:02,888 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 58 predicate places. [2021-06-13 08:44:02,888 INFO L482 AbstractCegarLoop]: Abstraction has has 85 places, 35 transitions, 301 flow [2021-06-13 08:44:02,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,889 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:02,889 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:02,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2021-06-13 08:44:02,889 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash 800442335, now seen corresponding path program 19 times [2021-06-13 08:44:02,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:02,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989822374] [2021-06-13 08:44:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:02,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:02,896 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,897 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,897 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,898 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,902 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,902 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,908 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,908 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:02,915 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,915 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:02,923 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,923 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:02,933 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:02,933 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:02,943 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:02,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:02,943 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:02,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:02,944 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989822374] [2021-06-13 08:44:02,944 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989822374] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:02,944 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:02,944 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:02,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875034327] [2021-06-13 08:44:02,944 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:02,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:02,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:02,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:02,945 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:02,945 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 35 transitions, 301 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:02,945 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:02,945 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:02,945 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:03,058 INFO L129 PetriNetUnfolder]: 7/77 cut-off events. [2021-06-13 08:44:03,058 INFO L130 PetriNetUnfolder]: For 518/518 co-relation queries the response was YES. [2021-06-13 08:44:03,058 INFO L84 FinitePrefix]: Finished finitePrefix Result has 346 conditions, 77 events. 7/77 cut-off events. For 518/518 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 280 event pairs, 0 based on Foata normal form. 2/78 useless extension candidates. Maximal degree in co-relation 316. Up to 12 conditions per place. [2021-06-13 08:44:03,059 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 6 selfloop transitions, 6 changer transitions 11/39 dead transitions. [2021-06-13 08:44:03,059 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 39 transitions, 396 flow [2021-06-13 08:44:03,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:03,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:03,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2021-06-13 08:44:03,059 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.71875 [2021-06-13 08:44:03,060 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 161 transitions. [2021-06-13 08:44:03,060 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 161 transitions. [2021-06-13 08:44:03,060 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:03,060 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 161 transitions. [2021-06-13 08:44:03,060 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 20.125) internal successors, (161), 8 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,061 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,061 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,061 INFO L185 Difference]: Start difference. First operand has 85 places, 35 transitions, 301 flow. Second operand 8 states and 161 transitions. [2021-06-13 08:44:03,061 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 39 transitions, 396 flow [2021-06-13 08:44:03,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 39 transitions, 293 flow, removed 17 selfloop flow, removed 19 redundant places. [2021-06-13 08:44:03,063 INFO L241 Difference]: Finished difference. Result has 66 places, 28 transitions, 155 flow [2021-06-13 08:44:03,063 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=155, PETRI_PLACES=66, PETRI_TRANSITIONS=28} [2021-06-13 08:44:03,063 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 39 predicate places. [2021-06-13 08:44:03,063 INFO L482 AbstractCegarLoop]: Abstraction has has 66 places, 28 transitions, 155 flow [2021-06-13 08:44:03,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,064 INFO L247 CegarLoopForPetriNet]: Found error trace [2021-06-13 08:44:03,064 INFO L255 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-13 08:44:03,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2021-06-13 08:44:03,064 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-13 08:44:03,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-13 08:44:03,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1943351947, now seen corresponding path program 20 times [2021-06-13 08:44:03,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-13 08:44:03,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83276043] [2021-06-13 08:44:03,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-13 08:44:03,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-13 08:44:03,071 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:03,071 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:03,072 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:03,072 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:03,077 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:03,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:03,083 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:03,083 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:03,090 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:03,090 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-06-13 08:44:03,099 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:03,100 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 11 [2021-06-13 08:44:03,109 INFO L142 QuantifierPusher]: treesize reduction 11, result has 45.0 percent of original size [2021-06-13 08:44:03,110 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-06-13 08:44:03,119 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-06-13 08:44:03,120 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 1 [2021-06-13 08:44:03,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-13 08:44:03,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-13 08:44:03,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83276043] [2021-06-13 08:44:03,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83276043] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-13 08:44:03,120 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-13 08:44:03,120 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2021-06-13 08:44:03,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140292405] [2021-06-13 08:44:03,121 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-13 08:44:03,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-13 08:44:03,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-13 08:44:03,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2021-06-13 08:44:03,121 INFO L500 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 28 [2021-06-13 08:44:03,121 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 28 transitions, 155 flow. Second operand has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,122 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-06-13 08:44:03,122 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 28 [2021-06-13 08:44:03,122 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-06-13 08:44:03,223 INFO L129 PetriNetUnfolder]: 3/49 cut-off events. [2021-06-13 08:44:03,223 INFO L130 PetriNetUnfolder]: For 185/191 co-relation queries the response was YES. [2021-06-13 08:44:03,224 INFO L84 FinitePrefix]: Finished finitePrefix Result has 184 conditions, 49 events. 3/49 cut-off events. For 185/191 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 135 event pairs, 0 based on Foata normal form. 4/52 useless extension candidates. Maximal degree in co-relation 163. Up to 8 conditions per place. [2021-06-13 08:44:03,224 INFO L132 encePairwiseOnDemand]: 19/28 looper letters, 0 selfloop transitions, 0 changer transitions 29/29 dead transitions. [2021-06-13 08:44:03,224 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 29 transitions, 217 flow [2021-06-13 08:44:03,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-13 08:44:03,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-06-13 08:44:03,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2021-06-13 08:44:03,224 INFO L545 CegarLoopForPetriNet]: DFA transition density 0.7008928571428571 [2021-06-13 08:44:03,224 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 157 transitions. [2021-06-13 08:44:03,225 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 157 transitions. [2021-06-13 08:44:03,225 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-06-13 08:44:03,225 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 157 transitions. [2021-06-13 08:44:03,225 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 19.625) internal successors, (157), 8 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,225 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,226 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 28.0) internal successors, (252), 9 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,226 INFO L185 Difference]: Start difference. First operand has 66 places, 28 transitions, 155 flow. Second operand 8 states and 157 transitions. [2021-06-13 08:44:03,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 29 transitions, 217 flow [2021-06-13 08:44:03,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 29 transitions, 187 flow, removed 7 selfloop flow, removed 9 redundant places. [2021-06-13 08:44:03,227 INFO L241 Difference]: Finished difference. Result has 57 places, 0 transitions, 0 flow [2021-06-13 08:44:03,227 INFO L318 CegarLoopForPetriNet]: {PETRI_ALPHABET=28, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=0, PETRI_PLACES=57, PETRI_TRANSITIONS=0} [2021-06-13 08:44:03,227 INFO L335 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2021-06-13 08:44:03,227 INFO L482 AbstractCegarLoop]: Abstraction has has 57 places, 0 transitions, 0 flow [2021-06-13 08:44:03,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 18.875) internal successors, (151), 8 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-13 08:44:03,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2021-06-13 08:44:03,229 INFO L247 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-13 08:44:03,232 INFO L202 PluginConnector]: Adding new model security.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.06 08:44:03 BasicIcfg [2021-06-13 08:44:03,232 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-13 08:44:03,232 INFO L168 Benchmark]: Toolchain (without parser) took 8915.01 ms. Allocated memory was 232.8 MB in the beginning and 392.2 MB in the end (delta: 159.4 MB). Free memory was 213.2 MB in the beginning and 287.7 MB in the end (delta: -74.5 MB). Peak memory consumption was 85.9 MB. Max. memory is 8.0 GB. [2021-06-13 08:44:03,232 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 232.8 MB. Free memory is still 214.3 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-06-13 08:44:03,232 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.62 ms. Allocated memory is still 232.8 MB. Free memory was 213.2 MB in the beginning and 211.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:44:03,232 INFO L168 Benchmark]: Boogie Preprocessor took 10.69 ms. Allocated memory is still 232.8 MB. Free memory was 211.8 MB in the beginning and 210.9 MB in the end (delta: 896.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-06-13 08:44:03,233 INFO L168 Benchmark]: RCFGBuilder took 215.11 ms. Allocated memory is still 232.8 MB. Free memory was 210.7 MB in the beginning and 200.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. [2021-06-13 08:44:03,233 INFO L168 Benchmark]: TraceAbstraction took 8664.65 ms. Allocated memory was 232.8 MB in the beginning and 392.2 MB in the end (delta: 159.4 MB). Free memory was 199.4 MB in the beginning and 287.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 72.3 MB. Max. memory is 8.0 GB. [2021-06-13 08:44:03,233 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 0.12 ms. Allocated memory is still 232.8 MB. Free memory is still 214.3 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 20.62 ms. Allocated memory is still 232.8 MB. Free memory was 213.2 MB in the beginning and 211.8 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 10.69 ms. Allocated memory is still 232.8 MB. Free memory was 211.8 MB in the beginning and 210.9 MB in the end (delta: 896.5 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 215.11 ms. Allocated memory is still 232.8 MB. Free memory was 210.7 MB in the beginning and 200.0 MB in the end (delta: 10.8 MB). Peak memory consumption was 11.5 MB. Max. memory is 8.0 GB. * TraceAbstraction took 8664.65 ms. Allocated memory was 232.8 MB in the beginning and 392.2 MB in the end (delta: 159.4 MB). Free memory was 199.4 MB in the beginning and 287.7 MB in the end (delta: -88.3 MB). Peak memory consumption was 72.3 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 69]: assertion always holds For all program executions holds that assertion always holds at this location - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 5 procedures, 43 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 7.6ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: SAFE, OverallTime: 8532.3ms, OverallIterations: 34, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 5951.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 46.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 468 SDtfs, 736 SDslu, 1067 SDs, 0 SdLazy, 1866 SolverSat, 76 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 1079.8ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 424 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 356 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 4084.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2032occurred in iteration=21, InterpolantAutomatonStates: 277, 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: 29.9ms SsaConstructionTime, 107.9ms SatisfiabilityAnalysisTime, 2147.2ms InterpolantComputationTime, 609 NumberOfCodeBlocks, 609 NumberOfCodeBlocksAsserted, 34 NumberOfCheckSat, 575 ConstructedInterpolants, 0 QuantifiedInterpolants, 3881 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 34 InterpolantComputations, 34 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 - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! Received shutdown request...