/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-2cf4d3f9dd5fed411db405f577e28237a543b59a-2cf4d3f [2021-08-13 02:36:21,479 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-13 02:36:21,480 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-13 02:36:21,505 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-13 02:36:21,513 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-13 02:36:21,513 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-13 02:36:21,514 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-13 02:36:21,515 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-13 02:36:21,526 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-13 02:36:21,526 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-13 02:36:21,528 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-13 02:36:21,529 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-13 02:36:21,530 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-13 02:36:21,531 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-13 02:36:21,532 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-13 02:36:21,532 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-13 02:36:21,534 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-13 02:36:21,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-PN-NoLbe-OGIterative.epf [2021-08-13 02:36:21,562 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-13 02:36:21,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-13 02:36:21,563 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-13 02:36:21,563 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-13 02:36:21,563 INFO L138 SettingsManager]: * Use SBE=true [2021-08-13 02:36:21,563 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-13 02:36:21,563 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-13 02:36:21,564 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-13 02:36:21,565 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-13 02:36:21,565 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-13 02:36:21,565 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-13 02:36:21,565 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-13 02:36:21,565 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-13 02:36:21,565 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 02:36:21,565 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-13 02:36:21,565 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-13 02:36:21,565 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-13 02:36:21,566 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-13 02:36:21,566 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-13 02:36:21,566 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-13 02:36:21,566 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-08-13 02:36:21,566 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-13 02:36:21,566 INFO L138 SettingsManager]: * Compute cosets for OwickiGries annotation iteratively=true [2021-08-13 02:36:21,566 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-13 02:36:21,802 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-13 02:36:21,822 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-13 02:36:21,824 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-13 02:36:21,825 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-13 02:36:21,826 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-13 02:36:21,827 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl [2021-08-13 02:36:21,827 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/fork_loop_unsafe.bpl' [2021-08-13 02:36:21,841 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-13 02:36:21,842 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-13 02:36:21,843 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-13 02:36:21,843 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-13 02:36:21,843 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-13 02:36:21,854 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,859 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,866 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-13 02:36:21,867 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-13 02:36:21,867 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-13 02:36:21,867 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-13 02:36:21,872 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,872 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,873 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,873 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,874 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,876 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,876 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... [2021-08-13 02:36:21,877 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-13 02:36:21,877 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-13 02:36:21,877 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-13 02:36:21,877 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-13 02:36:21,878 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-13 02:36:21,935 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-13 02:36:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-13 02:36:21,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-13 02:36:21,936 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread given in one single declaration [2021-08-13 02:36:21,936 INFO L130 BoogieDeclarations]: Found specification of procedure thread [2021-08-13 02:36:21,936 INFO L138 BoogieDeclarations]: Found implementation of procedure thread [2021-08-13 02:36:21,936 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-13 02:36:22,022 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-13 02:36:22,022 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2021-08-13 02:36:22,023 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 02:36:22 BoogieIcfgContainer [2021-08-13 02:36:22,023 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-13 02:36:22,025 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-13 02:36:22,025 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-13 02:36:22,026 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-13 02:36:22,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.08 02:36:21" (1/2) ... [2021-08-13 02:36:22,027 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58b6c2ad and model type fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.08 02:36:22, skipping insertion in model container [2021-08-13 02:36:22,027 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.08 02:36:22" (2/2) ... [2021-08-13 02:36:22,028 INFO L111 eAbstractionObserver]: Analyzing ICFG fork_loop_unsafe.bpl [2021-08-13 02:36:22,032 INFO L206 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-13 02:36:22,032 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-13 02:36:22,033 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-13 02:36:22,054 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,055 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,056 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,056 WARN L313 ript$VariableManager]: TermVariabe threadThread1of1ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,066 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:22,085 INFO L255 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-13 02:36:22,099 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:22,099 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:22,099 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:22,099 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:22,099 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:22,099 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:22,099 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:22,100 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:22,105 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 13 places, 10 transitions, 25 flow [2021-08-13 02:36:22,117 INFO L129 PetriNetUnfolder]: 0/11 cut-off events. [2021-08-13 02:36:22,117 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,118 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16 conditions, 11 events. 0/11 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 11 event pairs, 0 based on Foata normal form. 0/10 useless extension candidates. Maximal degree in co-relation 0. Up to 2 conditions per place. [2021-08-13 02:36:22,118 INFO L82 GeneralOperation]: Start removeDead. Operand has 13 places, 10 transitions, 25 flow [2021-08-13 02:36:22,121 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 13 places, 10 transitions, 25 flow [2021-08-13 02:36:22,124 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-08-13 02:36:22,124 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,124 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,125 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:36:22,125 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash 43134229, now seen corresponding path program 1 times [2021-08-13 02:36:22,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746574660] [2021-08-13 02:36:22,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:22,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,249 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,260 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,261 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,286 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,311 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:22,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:22,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:22,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746574660] [2021-08-13 02:36:22,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746574660] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:22,347 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:22,347 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 02:36:22,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515771631] [2021-08-13 02:36:22,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 02:36:22,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:22,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 02:36:22,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-13 02:36:22,376 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 3 out of 10 [2021-08-13 02:36:22,393 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 13 places, 10 transitions, 25 flow. Second operand has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,394 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:22,394 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 3 of 10 [2021-08-13 02:36:22,395 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:22,464 INFO L129 PetriNetUnfolder]: 2/15 cut-off events. [2021-08-13 02:36:22,464 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2021-08-13 02:36:22,465 INFO L84 FinitePrefix]: Finished finitePrefix Result has 31 conditions, 15 events. 2/15 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 22 event pairs, 0 based on Foata normal form. 0/15 useless extension candidates. Maximal degree in co-relation 17. Up to 6 conditions per place. [2021-08-13 02:36:22,466 INFO L132 encePairwiseOnDemand]: 5/10 looper letters, 3 selfloop transitions, 4 changer transitions 1/10 dead transitions. [2021-08-13 02:36:22,466 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 17 places, 10 transitions, 39 flow [2021-08-13 02:36:22,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 02:36:22,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 02:36:22,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 26 transitions. [2021-08-13 02:36:22,478 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2021-08-13 02:36:22,479 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 26 transitions. [2021-08-13 02:36:22,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 26 transitions. [2021-08-13 02:36:22,480 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:22,481 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 26 transitions. [2021-08-13 02:36:22,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 4.333333333333333) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,484 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,485 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,485 INFO L348 CegarLoopForPetriNet]: 13 programPoint places, 4 predicate places. [2021-08-13 02:36:22,485 INFO L482 AbstractCegarLoop]: Abstraction has has 17 places, 10 transitions, 39 flow [2021-08-13 02:36:22,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.8333333333333335) internal successors, (23), 6 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,485 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,486 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:36:22,486 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-13 02:36:22,486 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,486 INFO L82 PathProgramCache]: Analyzing trace with hash 43134170, now seen corresponding path program 1 times [2021-08-13 02:36:22,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,487 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567708746] [2021-08-13 02:36:22,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,495 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,504 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,513 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:22,513 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:22,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-13 02:36:22,514 WARN L235 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:22,514 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2021-08-13 02:36:22,521 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,521 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,522 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,522 WARN L313 ript$VariableManager]: TermVariabe threadThread1of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,523 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,523 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,523 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,523 WARN L313 ript$VariableManager]: TermVariabe threadThread2of2ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,530 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:22,531 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-13 02:36:22,532 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:22,532 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:22,532 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:22,532 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:22,532 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:22,532 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:22,532 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:22,532 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:22,533 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 02:36:22,536 INFO L129 PetriNetUnfolder]: 0/18 cut-off events. [2021-08-13 02:36:22,536 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-08-13 02:36:22,537 INFO L84 FinitePrefix]: Finished finitePrefix Result has 28 conditions, 18 events. 0/18 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 29 event pairs, 0 based on Foata normal form. 0/16 useless extension candidates. Maximal degree in co-relation 0. Up to 3 conditions per place. [2021-08-13 02:36:22,537 INFO L82 GeneralOperation]: Start removeDead. Operand has 20 places, 15 transitions, 42 flow [2021-08-13 02:36:22,537 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 20 places, 15 transitions, 42 flow [2021-08-13 02:36:22,539 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-08-13 02:36:22,539 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 02:36:22,539 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,539 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:36:22,539 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,539 INFO L82 PathProgramCache]: Analyzing trace with hash 57452648, now seen corresponding path program 1 times [2021-08-13 02:36:22,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490582021] [2021-08-13 02:36:22,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:22,549 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,549 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,552 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,553 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,557 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,557 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,562 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,562 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:22,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:22,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:22,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490582021] [2021-08-13 02:36:22,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490582021] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:22,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:22,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 02:36:22,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111687979] [2021-08-13 02:36:22,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 02:36:22,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:22,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 02:36:22,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-13 02:36:22,574 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 4 out of 15 [2021-08-13 02:36:22,574 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,574 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:22,574 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 4 of 15 [2021-08-13 02:36:22,574 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:22,668 INFO L129 PetriNetUnfolder]: 34/88 cut-off events. [2021-08-13 02:36:22,668 INFO L130 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2021-08-13 02:36:22,671 INFO L84 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 88 events. 34/88 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 279 event pairs, 4 based on Foata normal form. 0/74 useless extension candidates. Maximal degree in co-relation 129. Up to 44 conditions per place. [2021-08-13 02:36:22,673 INFO L132 encePairwiseOnDemand]: 9/15 looper letters, 12 selfloop transitions, 7 changer transitions 0/23 dead transitions. [2021-08-13 02:36:22,673 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 25 places, 23 transitions, 101 flow [2021-08-13 02:36:22,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 02:36:22,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 02:36:22,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 44 transitions. [2021-08-13 02:36:22,675 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2021-08-13 02:36:22,675 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 44 transitions. [2021-08-13 02:36:22,675 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 44 transitions. [2021-08-13 02:36:22,675 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:22,676 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 44 transitions. [2021-08-13 02:36:22,677 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 7.333333333333333) internal successors, (44), 6 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,678 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,678 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,679 INFO L348 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2021-08-13 02:36:22,679 INFO L482 AbstractCegarLoop]: Abstraction has has 25 places, 23 transitions, 101 flow [2021-08-13 02:36:22,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.833333333333333) internal successors, (29), 6 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,679 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,679 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2021-08-13 02:36:22,679 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-13 02:36:22,679 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,680 INFO L82 PathProgramCache]: Analyzing trace with hash -622629923, now seen corresponding path program 1 times [2021-08-13 02:36:22,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,681 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358561649] [2021-08-13 02:36:22,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,691 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:22,694 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:22,696 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:22,696 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:22,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-13 02:36:22,696 WARN L235 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:22,696 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2021-08-13 02:36:22,701 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,702 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,702 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,702 WARN L313 ript$VariableManager]: TermVariabe threadThread3of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,703 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,703 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,703 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,703 WARN L313 ript$VariableManager]: TermVariabe threadThread2of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,704 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,704 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,704 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,704 WARN L313 ript$VariableManager]: TermVariabe threadThread1of3ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:22,708 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:22,709 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-08-13 02:36:22,710 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:22,710 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:22,710 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:22,710 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:22,710 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:22,710 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:22,710 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:22,710 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:22,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 27 places, 20 transitions, 61 flow [2021-08-13 02:36:22,718 INFO L129 PetriNetUnfolder]: 0/25 cut-off events. [2021-08-13 02:36:22,719 INFO L130 PetriNetUnfolder]: For 7/7 co-relation queries the response was YES. [2021-08-13 02:36:22,719 INFO L84 FinitePrefix]: Finished finitePrefix Result has 41 conditions, 25 events. 0/25 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 50 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 0. Up to 4 conditions per place. [2021-08-13 02:36:22,719 INFO L82 GeneralOperation]: Start removeDead. Operand has 27 places, 20 transitions, 61 flow [2021-08-13 02:36:22,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 27 places, 20 transitions, 61 flow [2021-08-13 02:36:22,721 INFO L129 PetriNetUnfolder]: 0/6 cut-off events. [2021-08-13 02:36:22,721 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 02:36:22,721 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,721 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:36:22,721 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,722 INFO L82 PathProgramCache]: Analyzing trace with hash 76542848, now seen corresponding path program 1 times [2021-08-13 02:36:22,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708362716] [2021-08-13 02:36:22,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:22,732 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,732 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,735 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,735 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,739 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,739 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,747 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,748 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:22,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:22,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:22,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708362716] [2021-08-13 02:36:22,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708362716] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:22,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:22,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 02:36:22,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581926812] [2021-08-13 02:36:22,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 02:36:22,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:22,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 02:36:22,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-13 02:36:22,754 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 02:36:22,755 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 27 places, 20 transitions, 61 flow. Second operand has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,755 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:22,755 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 02:36:22,755 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:22,839 INFO L129 PetriNetUnfolder]: 268/491 cut-off events. [2021-08-13 02:36:22,839 INFO L130 PetriNetUnfolder]: For 97/97 co-relation queries the response was YES. [2021-08-13 02:36:22,841 INFO L84 FinitePrefix]: Finished finitePrefix Result has 1002 conditions, 491 events. 268/491 cut-off events. For 97/97 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2139 event pairs, 66 based on Foata normal form. 0/383 useless extension candidates. Maximal degree in co-relation 733. Up to 373 conditions per place. [2021-08-13 02:36:22,844 INFO L132 encePairwiseOnDemand]: 13/20 looper letters, 22 selfloop transitions, 9 changer transitions 0/36 dead transitions. [2021-08-13 02:36:22,844 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 36 transitions, 174 flow [2021-08-13 02:36:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 02:36:22,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 02:36:22,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 62 transitions. [2021-08-13 02:36:22,845 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5166666666666667 [2021-08-13 02:36:22,845 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 62 transitions. [2021-08-13 02:36:22,845 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 62 transitions. [2021-08-13 02:36:22,845 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:22,845 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 62 transitions. [2021-08-13 02:36:22,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 10.333333333333334) internal successors, (62), 6 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,846 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 20.0) internal successors, (140), 7 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,847 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 5 predicate places. [2021-08-13 02:36:22,847 INFO L482 AbstractCegarLoop]: Abstraction has has 32 places, 36 transitions, 174 flow [2021-08-13 02:36:22,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.833333333333333) internal successors, (35), 6 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,847 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:22,847 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:22,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-13 02:36:22,847 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:22,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:22,847 INFO L82 PathProgramCache]: Analyzing trace with hash 542941744, now seen corresponding path program 1 times [2021-08-13 02:36:22,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:22,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924531703] [2021-08-13 02:36:22,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:22,866 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,866 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,869 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,869 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,872 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,873 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:22,877 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,877 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:22,881 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:22,882 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:22,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:22,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924531703] [2021-08-13 02:36:22,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924531703] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:22,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:22,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 02:36:22,888 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854557064] [2021-08-13 02:36:22,888 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 02:36:22,888 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:22,888 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 02:36:22,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 02:36:22,890 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 02:36:22,890 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 36 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:22,890 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:22,890 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 02:36:22,890 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:23,093 INFO L129 PetriNetUnfolder]: 475/939 cut-off events. [2021-08-13 02:36:23,094 INFO L130 PetriNetUnfolder]: For 273/273 co-relation queries the response was YES. [2021-08-13 02:36:23,097 INFO L84 FinitePrefix]: Finished finitePrefix Result has 2743 conditions, 939 events. 475/939 cut-off events. For 273/273 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 5409 event pairs, 116 based on Foata normal form. 0/747 useless extension candidates. Maximal degree in co-relation 1313. Up to 696 conditions per place. [2021-08-13 02:36:23,104 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 45 selfloop transitions, 24 changer transitions 0/74 dead transitions. [2021-08-13 02:36:23,104 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 74 transitions, 490 flow [2021-08-13 02:36:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 02:36:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 02:36:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 115 transitions. [2021-08-13 02:36:23,107 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.575 [2021-08-13 02:36:23,107 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 115 transitions. [2021-08-13 02:36:23,107 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 115 transitions. [2021-08-13 02:36:23,107 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:23,107 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 115 transitions. [2021-08-13 02:36:23,109 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.5) internal successors, (115), 10 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,110 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,110 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,111 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 14 predicate places. [2021-08-13 02:36:23,111 INFO L482 AbstractCegarLoop]: Abstraction has has 41 places, 74 transitions, 490 flow [2021-08-13 02:36:23,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.0) internal successors, (42), 7 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,111 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,111 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:23,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-13 02:36:23,111 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,112 INFO L82 PathProgramCache]: Analyzing trace with hash -348674961, now seen corresponding path program 1 times [2021-08-13 02:36:23,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526257853] [2021-08-13 02:36:23,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:23,136 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,137 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,139 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,139 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,144 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,144 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,147 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,148 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:23,152 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:23,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:23,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526257853] [2021-08-13 02:36:23,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526257853] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 02:36:23,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557447817] [2021-08-13 02:36:23,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-13 02:36:23,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:23,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-13 02:36:23,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-13 02:36:23,208 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,208 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,209 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,209 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,210 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,210 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,215 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,217 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,217 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,218 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,218 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,219 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,220 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,230 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,230 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:36:23,232 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,244 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:23,245 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,245 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,246 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 02:36:23,250 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,265 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,267 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,268 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,286 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,288 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,289 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,289 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,290 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,290 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,291 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,296 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,298 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,299 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,301 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,301 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,302 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,302 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,303 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,306 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,308 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:23,308 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:23,309 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 02:36:23,310 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,316 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:23,318 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,318 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:23,319 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 02:36:23,319 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,320 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,321 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,321 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,328 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,329 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:23,330 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:23,330 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 02:36:23,331 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,332 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:23,332 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,332 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:23,333 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 02:36:23,333 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,334 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,334 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,335 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:23,342 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:23,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557447817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 02:36:23,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-13 02:36:23,342 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-13 02:36:23,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159923062] [2021-08-13 02:36:23,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-13 02:36:23,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:23,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-13 02:36:23,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-13 02:36:23,343 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 02:36:23,344 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 74 transitions, 490 flow. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,344 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:23,344 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 02:36:23,344 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:23,467 INFO L129 PetriNetUnfolder]: 416/878 cut-off events. [2021-08-13 02:36:23,467 INFO L130 PetriNetUnfolder]: For 219/219 co-relation queries the response was YES. [2021-08-13 02:36:23,469 INFO L84 FinitePrefix]: Finished finitePrefix Result has 3205 conditions, 878 events. 416/878 cut-off events. For 219/219 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 5258 event pairs, 31 based on Foata normal form. 0/720 useless extension candidates. Maximal degree in co-relation 755. Up to 625 conditions per place. [2021-08-13 02:36:23,474 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 61 selfloop transitions, 27 changer transitions 0/93 dead transitions. [2021-08-13 02:36:23,474 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 93 transitions, 780 flow [2021-08-13 02:36:23,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 02:36:23,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 02:36:23,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 82 transitions. [2021-08-13 02:36:23,477 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5125 [2021-08-13 02:36:23,477 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 82 transitions. [2021-08-13 02:36:23,477 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 82 transitions. [2021-08-13 02:36:23,478 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:23,478 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 82 transitions. [2021-08-13 02:36:23,479 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 10.25) internal successors, (82), 8 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,480 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,481 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 20.0) internal successors, (180), 9 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,481 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 21 predicate places. [2021-08-13 02:36:23,481 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 93 transitions, 780 flow [2021-08-13 02:36:23,481 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 11 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,481 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,481 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:23,697 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-08-13 02:36:23,697 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,698 INFO L82 PathProgramCache]: Analyzing trace with hash -339906925, now seen corresponding path program 1 times [2021-08-13 02:36:23,698 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,698 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883306269] [2021-08-13 02:36:23,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:23,707 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,708 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,710 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,710 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,713 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,713 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:23,716 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,716 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,717 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,717 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:23,722 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:23,722 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 02:36:23,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:23,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883306269] [2021-08-13 02:36:23,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883306269] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:23,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:23,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 02:36:23,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128885974] [2021-08-13 02:36:23,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 02:36:23,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:23,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 02:36:23,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 02:36:23,728 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 02:36:23,729 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 93 transitions, 780 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,729 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:23,729 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 02:36:23,729 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:23,936 INFO L129 PetriNetUnfolder]: 605/1363 cut-off events. [2021-08-13 02:36:23,937 INFO L130 PetriNetUnfolder]: For 405/405 co-relation queries the response was YES. [2021-08-13 02:36:23,939 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5957 conditions, 1363 events. 605/1363 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 9587 event pairs, 64 based on Foata normal form. 0/1100 useless extension candidates. Maximal degree in co-relation 860. Up to 968 conditions per place. [2021-08-13 02:36:23,948 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 95 selfloop transitions, 34 changer transitions 0/134 dead transitions. [2021-08-13 02:36:23,948 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 134 transitions, 1380 flow [2021-08-13 02:36:23,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 02:36:23,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 02:36:23,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 119 transitions. [2021-08-13 02:36:23,950 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.595 [2021-08-13 02:36:23,950 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 119 transitions. [2021-08-13 02:36:23,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 119 transitions. [2021-08-13 02:36:23,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:23,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 119 transitions. [2021-08-13 02:36:23,950 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 11.9) internal successors, (119), 10 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,952 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 20.0) internal successors, (220), 11 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,952 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 30 predicate places. [2021-08-13 02:36:23,952 INFO L482 AbstractCegarLoop]: Abstraction has has 57 places, 134 transitions, 1380 flow [2021-08-13 02:36:23,952 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:23,953 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:23,953 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:23,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-13 02:36:23,953 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:23,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:23,954 INFO L82 PathProgramCache]: Analyzing trace with hash -348844225, now seen corresponding path program 2 times [2021-08-13 02:36:23,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:23,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367306039] [2021-08-13 02:36:23,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:23,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:24,014 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,014 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,017 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,018 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,022 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,022 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:24,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,026 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,026 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,027 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,031 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,031 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 02:36:24,036 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:24,036 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367306039] [2021-08-13 02:36:24,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367306039] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:24,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:24,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 02:36:24,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250546421] [2021-08-13 02:36:24,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 02:36:24,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:24,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 02:36:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 02:36:24,037 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 02:36:24,037 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 134 transitions, 1380 flow. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,037 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:24,037 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 02:36:24,037 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:24,299 INFO L129 PetriNetUnfolder]: 686/1545 cut-off events. [2021-08-13 02:36:24,299 INFO L130 PetriNetUnfolder]: For 489/489 co-relation queries the response was YES. [2021-08-13 02:36:24,302 INFO L84 FinitePrefix]: Finished finitePrefix Result has 7954 conditions, 1545 events. 686/1545 cut-off events. For 489/489 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 11349 event pairs, 86 based on Foata normal form. 0/1276 useless extension candidates. Maximal degree in co-relation 1487. Up to 1097 conditions per place. [2021-08-13 02:36:24,311 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 122 selfloop transitions, 34 changer transitions 0/161 dead transitions. [2021-08-13 02:36:24,312 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 161 transitions, 1983 flow [2021-08-13 02:36:24,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-13 02:36:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-08-13 02:36:24,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 143 transitions. [2021-08-13 02:36:24,314 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.55 [2021-08-13 02:36:24,314 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 143 transitions. [2021-08-13 02:36:24,314 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 143 transitions. [2021-08-13 02:36:24,314 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:24,314 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 143 transitions. [2021-08-13 02:36:24,315 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 11.0) internal successors, (143), 13 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,315 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 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) [2021-08-13 02:36:24,315 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 20.0) internal successors, (280), 14 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) [2021-08-13 02:36:24,315 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 42 predicate places. [2021-08-13 02:36:24,315 INFO L482 AbstractCegarLoop]: Abstraction has has 69 places, 161 transitions, 1983 flow [2021-08-13 02:36:24,315 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 7 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,315 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,316 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:24,316 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-08-13 02:36:24,316 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,316 INFO L82 PathProgramCache]: Analyzing trace with hash -348674965, now seen corresponding path program 3 times [2021-08-13 02:36:24,316 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,316 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039509219] [2021-08-13 02:36:24,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:24,345 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,345 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,347 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,347 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,353 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,353 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:24,357 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,357 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:24,361 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,362 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,372 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,372 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:24,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:24,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:24,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039509219] [2021-08-13 02:36:24,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039509219] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:24,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:24,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 02:36:24,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869592602] [2021-08-13 02:36:24,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 02:36:24,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:24,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 02:36:24,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 02:36:24,380 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 5 out of 20 [2021-08-13 02:36:24,380 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 161 transitions, 1983 flow. Second operand has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,380 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:24,381 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 5 of 20 [2021-08-13 02:36:24,381 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:24,631 INFO L129 PetriNetUnfolder]: 627/1445 cut-off events. [2021-08-13 02:36:24,631 INFO L130 PetriNetUnfolder]: For 450/450 co-relation queries the response was YES. [2021-08-13 02:36:24,634 INFO L84 FinitePrefix]: Finished finitePrefix Result has 8472 conditions, 1445 events. 627/1445 cut-off events. For 450/450 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 10542 event pairs, 71 based on Foata normal form. 0/1212 useless extension candidates. Maximal degree in co-relation 1334. Up to 1007 conditions per place. [2021-08-13 02:36:24,644 INFO L132 encePairwiseOnDemand]: 12/20 looper letters, 116 selfloop transitions, 37 changer transitions 0/158 dead transitions. [2021-08-13 02:36:24,644 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 158 transitions, 2253 flow [2021-08-13 02:36:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-13 02:36:24,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-08-13 02:36:24,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 136 transitions. [2021-08-13 02:36:24,645 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5666666666666667 [2021-08-13 02:36:24,645 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 136 transitions. [2021-08-13 02:36:24,645 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 136 transitions. [2021-08-13 02:36:24,646 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:24,646 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 136 transitions. [2021-08-13 02:36:24,647 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 11.333333333333334) internal successors, (136), 12 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,647 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 20.0) internal successors, (260), 13 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,648 INFO L348 CegarLoopForPetriNet]: 27 programPoint places, 53 predicate places. [2021-08-13 02:36:24,648 INFO L482 AbstractCegarLoop]: Abstraction has has 80 places, 158 transitions, 2253 flow [2021-08-13 02:36:24,648 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.0) internal successors, (48), 8 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,648 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,648 INFO L266 CegarLoopForPetriNet]: trace histogram [3, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:24,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-13 02:36:24,648 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,649 INFO L82 PathProgramCache]: Analyzing trace with hash 2075805806, now seen corresponding path program 1 times [2021-08-13 02:36:24,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598090620] [2021-08-13 02:36:24,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:24,655 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:24,664 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:24,667 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:24,667 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:24,667 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-13 02:36:24,668 WARN L235 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2021-08-13 02:36:24,668 INFO L445 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2021-08-13 02:36:24,671 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,671 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,672 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,672 WARN L313 ript$VariableManager]: TermVariabe threadThread3of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,672 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,672 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,672 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,672 WARN L313 ript$VariableManager]: TermVariabe threadThread1of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,672 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,672 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,673 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,673 WARN L313 ript$VariableManager]: TermVariabe threadThread2of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,673 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,673 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,673 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,673 WARN L313 ript$VariableManager]: TermVariabe threadThread4of4ForFork0_y not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-08-13 02:36:24,676 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2021-08-13 02:36:24,677 INFO L255 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2021-08-13 02:36:24,678 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-08-13 02:36:24,678 INFO L379 AbstractCegarLoop]: Hoare is false [2021-08-13 02:36:24,678 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-08-13 02:36:24,678 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-08-13 02:36:24,678 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-08-13 02:36:24,678 INFO L383 AbstractCegarLoop]: Difference is false [2021-08-13 02:36:24,678 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-08-13 02:36:24,678 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-08-13 02:36:24,679 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 34 places, 25 transitions, 82 flow [2021-08-13 02:36:24,681 INFO L129 PetriNetUnfolder]: 0/32 cut-off events. [2021-08-13 02:36:24,681 INFO L130 PetriNetUnfolder]: For 16/16 co-relation queries the response was YES. [2021-08-13 02:36:24,681 INFO L84 FinitePrefix]: Finished finitePrefix Result has 55 conditions, 32 events. 0/32 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 66 event pairs, 0 based on Foata normal form. 0/28 useless extension candidates. Maximal degree in co-relation 0. Up to 5 conditions per place. [2021-08-13 02:36:24,681 INFO L82 GeneralOperation]: Start removeDead. Operand has 34 places, 25 transitions, 82 flow [2021-08-13 02:36:24,681 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 34 places, 25 transitions, 82 flow [2021-08-13 02:36:24,682 INFO L129 PetriNetUnfolder]: 0/7 cut-off events. [2021-08-13 02:36:24,682 INFO L130 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2021-08-13 02:36:24,682 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,682 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2021-08-13 02:36:24,682 INFO L430 AbstractCegarLoop]: === Iteration 1 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,682 INFO L82 PathProgramCache]: Analyzing trace with hash 100404189, now seen corresponding path program 1 times [2021-08-13 02:36:24,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678408507] [2021-08-13 02:36:24,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:24,696 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,696 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,698 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,698 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,702 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,702 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,706 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,706 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:24,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:24,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:24,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678408507] [2021-08-13 02:36:24,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678408507] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:24,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:24,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-13 02:36:24,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839789075] [2021-08-13 02:36:24,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-08-13 02:36:24,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:24,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-13 02:36:24,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-08-13 02:36:24,712 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:24,712 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 82 flow. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,712 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:24,712 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:24,712 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:24,895 INFO L129 PetriNetUnfolder]: 1604/2502 cut-off events. [2021-08-13 02:36:24,895 INFO L130 PetriNetUnfolder]: For 726/726 co-relation queries the response was YES. [2021-08-13 02:36:24,898 INFO L84 FinitePrefix]: Finished finitePrefix Result has 5176 conditions, 2502 events. 1604/2502 cut-off events. For 726/726 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 12494 event pairs, 600 based on Foata normal form. 0/1884 useless extension candidates. Maximal degree in co-relation 3735. Up to 2176 conditions per place. [2021-08-13 02:36:24,912 INFO L132 encePairwiseOnDemand]: 17/25 looper letters, 30 selfloop transitions, 11 changer transitions 0/47 dead transitions. [2021-08-13 02:36:24,912 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 47 transitions, 245 flow [2021-08-13 02:36:24,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-13 02:36:24,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2021-08-13 02:36:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 78 transitions. [2021-08-13 02:36:24,913 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.52 [2021-08-13 02:36:24,913 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 78 transitions. [2021-08-13 02:36:24,913 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 78 transitions. [2021-08-13 02:36:24,913 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:24,913 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 78 transitions. [2021-08-13 02:36:24,913 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 13.0) internal successors, (78), 6 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,913 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,914 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 25.0) internal successors, (175), 7 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,914 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 5 predicate places. [2021-08-13 02:36:24,914 INFO L482 AbstractCegarLoop]: Abstraction has has 39 places, 47 transitions, 245 flow [2021-08-13 02:36:24,914 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,914 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:24,914 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:24,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-13 02:36:24,914 INFO L430 AbstractCegarLoop]: === Iteration 2 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:24,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:24,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1998981745, now seen corresponding path program 1 times [2021-08-13 02:36:24,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:24,915 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547799200] [2021-08-13 02:36:24,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:24,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:24,936 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,937 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,939 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,939 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,942 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,943 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:24,947 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,947 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:24,951 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:24,951 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:24,956 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:24,956 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:24,956 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547799200] [2021-08-13 02:36:24,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547799200] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:24,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:24,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 02:36:24,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1641525663] [2021-08-13 02:36:24,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 02:36:24,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 02:36:24,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 02:36:24,958 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:24,958 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 47 transitions, 245 flow. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:24,958 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:24,958 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:24,958 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:25,404 INFO L129 PetriNetUnfolder]: 3369/5584 cut-off events. [2021-08-13 02:36:25,405 INFO L130 PetriNetUnfolder]: For 2584/2584 co-relation queries the response was YES. [2021-08-13 02:36:25,415 INFO L84 FinitePrefix]: Finished finitePrefix Result has 16772 conditions, 5584 events. 3369/5584 cut-off events. For 2584/2584 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 36198 event pairs, 1067 based on Foata normal form. 0/4323 useless extension candidates. Maximal degree in co-relation 6169. Up to 4644 conditions per place. [2021-08-13 02:36:25,449 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 65 selfloop transitions, 29 changer transitions 0/100 dead transitions. [2021-08-13 02:36:25,449 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 100 transitions, 707 flow [2021-08-13 02:36:25,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 02:36:25,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 02:36:25,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 148 transitions. [2021-08-13 02:36:25,451 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.592 [2021-08-13 02:36:25,451 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 148 transitions. [2021-08-13 02:36:25,451 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 148 transitions. [2021-08-13 02:36:25,451 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:25,451 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 148 transitions. [2021-08-13 02:36:25,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,452 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,452 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,452 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 14 predicate places. [2021-08-13 02:36:25,452 INFO L482 AbstractCegarLoop]: Abstraction has has 48 places, 100 transitions, 707 flow [2021-08-13 02:36:25,452 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,452 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:25,452 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:25,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-08-13 02:36:25,452 INFO L430 AbstractCegarLoop]: === Iteration 3 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:25,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:25,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1838891887, now seen corresponding path program 1 times [2021-08-13 02:36:25,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:25,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934659336] [2021-08-13 02:36:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:25,470 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:25,471 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:25,477 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:25,477 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:25,481 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:25,481 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:25,485 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:25,486 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:25,491 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:25,491 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:25,496 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:25,496 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:25,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:25,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:25,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934659336] [2021-08-13 02:36:25,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934659336] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:25,502 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:25,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 02:36:25,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987481189] [2021-08-13 02:36:25,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 02:36:25,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:25,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 02:36:25,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 02:36:25,504 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:25,504 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 100 transitions, 707 flow. Second operand has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:25,504 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:25,504 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:25,504 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:26,012 INFO L129 PetriNetUnfolder]: 3375/5626 cut-off events. [2021-08-13 02:36:26,013 INFO L130 PetriNetUnfolder]: For 2629/2629 co-relation queries the response was YES. [2021-08-13 02:36:26,021 INFO L84 FinitePrefix]: Finished finitePrefix Result has 21717 conditions, 5626 events. 3375/5626 cut-off events. For 2629/2629 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36936 event pairs, 452 based on Foata normal form. 0/4413 useless extension candidates. Maximal degree in co-relation 3994. Up to 4668 conditions per place. [2021-08-13 02:36:26,053 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 90 selfloop transitions, 42 changer transitions 0/138 dead transitions. [2021-08-13 02:36:26,053 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 138 transitions, 1224 flow [2021-08-13 02:36:26,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-13 02:36:26,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2021-08-13 02:36:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 205 transitions. [2021-08-13 02:36:26,055 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.6307692307692307 [2021-08-13 02:36:26,055 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 205 transitions. [2021-08-13 02:36:26,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 205 transitions. [2021-08-13 02:36:26,055 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:26,055 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 205 transitions. [2021-08-13 02:36:26,056 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 15.76923076923077) internal successors, (205), 13 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,057 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,057 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 25.0) internal successors, (350), 14 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,057 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 26 predicate places. [2021-08-13 02:36:26,057 INFO L482 AbstractCegarLoop]: Abstraction has has 60 places, 138 transitions, 1224 flow [2021-08-13 02:36:26,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.0) internal successors, (56), 8 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,057 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:26,057 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:26,057 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-13 02:36:26,057 INFO L430 AbstractCegarLoop]: === Iteration 4 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:26,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:26,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1838484543, now seen corresponding path program 1 times [2021-08-13 02:36:26,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:26,058 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146217734] [2021-08-13 02:36:26,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:26,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:26,073 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,074 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,076 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,077 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,079 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,079 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,083 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,084 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:26,088 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,089 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:26,093 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:26,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:26,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146217734] [2021-08-13 02:36:26,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146217734] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 02:36:26,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354507105] [2021-08-13 02:36:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-13 02:36:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:26,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 21 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-13 02:36:26,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-13 02:36:26,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,124 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,124 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,125 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,125 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,127 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,128 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,128 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,141 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,141 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,142 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,142 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,143 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,143 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,151 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 10 [2021-08-13 02:36:26,151 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,152 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:26,153 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,153 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 12 [2021-08-13 02:36:26,154 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,155 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,155 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,162 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,162 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,163 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,163 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,164 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,164 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,165 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:26,165 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:26,166 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 02:36:26,166 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,167 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:26,167 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,167 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:26,168 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 02:36:26,168 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,169 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,169 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,170 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,177 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,178 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,178 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,179 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,179 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,180 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,180 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,181 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:26,181 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:26,183 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 02:36:26,184 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,184 WARN L159 QuantifierPusher]: Ignoring assumption. [2021-08-13 02:36:26,185 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 9 [2021-08-13 02:36:26,186 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 14 [2021-08-13 02:36:26,187 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,188 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,188 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 7 [2021-08-13 02:36:26,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:26,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [354507105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-13 02:36:26,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-13 02:36:26,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-08-13 02:36:26,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697327487] [2021-08-13 02:36:26,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-08-13 02:36:26,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:26,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-13 02:36:26,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-08-13 02:36:26,197 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:26,197 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 138 transitions, 1224 flow. Second operand has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,197 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:26,197 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:26,198 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:26,672 INFO L129 PetriNetUnfolder]: 3441/6001 cut-off events. [2021-08-13 02:36:26,672 INFO L130 PetriNetUnfolder]: For 2636/2636 co-relation queries the response was YES. [2021-08-13 02:36:26,689 INFO L84 FinitePrefix]: Finished finitePrefix Result has 27672 conditions, 6001 events. 3441/6001 cut-off events. For 2636/2636 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 42628 event pairs, 522 based on Foata normal form. 0/4739 useless extension candidates. Maximal degree in co-relation 10667. Up to 4865 conditions per place. [2021-08-13 02:36:26,720 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 125 selfloop transitions, 47 changer transitions 0/178 dead transitions. [2021-08-13 02:36:26,720 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 178 transitions, 1915 flow [2021-08-13 02:36:26,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-13 02:36:26,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2021-08-13 02:36:26,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 113 transitions. [2021-08-13 02:36:26,721 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.565 [2021-08-13 02:36:26,721 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 113 transitions. [2021-08-13 02:36:26,722 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 113 transitions. [2021-08-13 02:36:26,722 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:26,722 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 113 transitions. [2021-08-13 02:36:26,722 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 14.125) internal successors, (113), 8 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,722 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,722 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 25.0) internal successors, (225), 9 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,723 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 33 predicate places. [2021-08-13 02:36:26,723 INFO L482 AbstractCegarLoop]: Abstraction has has 67 places, 178 transitions, 1915 flow [2021-08-13 02:36:26,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 7.363636363636363) internal successors, (81), 11 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,723 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:26,723 INFO L266 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:26,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-13 02:36:26,937 INFO L430 AbstractCegarLoop]: === Iteration 5 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:26,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:26,937 INFO L82 PathProgramCache]: Analyzing trace with hash 1843846927, now seen corresponding path program 2 times [2021-08-13 02:36:26,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:26,937 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332446953] [2021-08-13 02:36:26,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:26,946 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,946 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,948 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,950 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,954 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,954 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:26,957 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,958 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,958 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,959 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:26,963 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:26,963 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:26,967 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 02:36:26,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:26,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332446953] [2021-08-13 02:36:26,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332446953] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:26,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:26,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-13 02:36:26,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487849371] [2021-08-13 02:36:26,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-08-13 02:36:26,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:26,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-13 02:36:26,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-08-13 02:36:26,969 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:26,969 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 178 transitions, 1915 flow. Second operand has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:26,969 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:26,969 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:26,970 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:27,729 INFO L129 PetriNetUnfolder]: 5107/9187 cut-off events. [2021-08-13 02:36:27,729 INFO L130 PetriNetUnfolder]: For 4354/4354 co-relation queries the response was YES. [2021-08-13 02:36:27,749 INFO L84 FinitePrefix]: Finished finitePrefix Result has 49444 conditions, 9187 events. 5107/9187 cut-off events. For 4354/4354 co-relation queries the response was YES. Maximal size of possible extension queue 820. Compared 73242 event pairs, 821 based on Foata normal form. 0/7095 useless extension candidates. Maximal degree in co-relation 12732. Up to 7355 conditions per place. [2021-08-13 02:36:27,821 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 164 selfloop transitions, 70 changer transitions 0/240 dead transitions. [2021-08-13 02:36:27,822 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 240 transitions, 3055 flow [2021-08-13 02:36:27,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-13 02:36:27,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2021-08-13 02:36:27,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2021-08-13 02:36:27,823 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.616 [2021-08-13 02:36:27,823 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 154 transitions. [2021-08-13 02:36:27,823 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 154 transitions. [2021-08-13 02:36:27,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:27,823 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 154 transitions. [2021-08-13 02:36:27,823 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 15.4) internal successors, (154), 10 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) [2021-08-13 02:36:27,824 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,824 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 25.0) internal successors, (275), 11 states have internal predecessors, (275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,824 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 42 predicate places. [2021-08-13 02:36:27,824 INFO L482 AbstractCegarLoop]: Abstraction has has 76 places, 240 transitions, 3055 flow [2021-08-13 02:36:27,824 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.142857142857143) internal successors, (50), 7 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:27,824 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:27,824 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:27,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-13 02:36:27,825 INFO L430 AbstractCegarLoop]: === Iteration 6 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:27,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:27,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1170789958, now seen corresponding path program 1 times [2021-08-13 02:36:27,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:27,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470545560] [2021-08-13 02:36:27,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:27,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:27,972 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,972 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:27,975 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,975 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:27,979 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,979 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:27,987 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,987 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:27,992 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,992 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:27,997 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:27,997 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:28,003 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:28,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:28,003 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470545560] [2021-08-13 02:36:28,003 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470545560] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:28,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:28,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 02:36:28,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829431318] [2021-08-13 02:36:28,004 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 02:36:28,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:28,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 02:36:28,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 02:36:28,006 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:28,006 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 240 transitions, 3055 flow. Second operand has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:28,006 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:28,006 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:28,006 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:29,040 INFO L129 PetriNetUnfolder]: 6442/11724 cut-off events. [2021-08-13 02:36:29,040 INFO L130 PetriNetUnfolder]: For 5784/5784 co-relation queries the response was YES. [2021-08-13 02:36:29,066 INFO L84 FinitePrefix]: Finished finitePrefix Result has 72333 conditions, 11724 events. 6442/11724 cut-off events. For 5784/5784 co-relation queries the response was YES. Maximal size of possible extension queue 1093. Compared 98912 event pairs, 946 based on Foata normal form. 0/9067 useless extension candidates. Maximal degree in co-relation 9557. Up to 9349 conditions per place. [2021-08-13 02:36:29,209 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 258 selfloop transitions, 108 changer transitions 0/372 dead transitions. [2021-08-13 02:36:29,209 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 372 transitions, 5414 flow [2021-08-13 02:36:29,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-13 02:36:29,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-08-13 02:36:29,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 171 transitions. [2021-08-13 02:36:29,210 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.57 [2021-08-13 02:36:29,210 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 171 transitions. [2021-08-13 02:36:29,210 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 171 transitions. [2021-08-13 02:36:29,210 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:29,210 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 171 transitions. [2021-08-13 02:36:29,211 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.25) internal successors, (171), 12 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) [2021-08-13 02:36:29,211 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,211 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,212 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 53 predicate places. [2021-08-13 02:36:29,212 INFO L482 AbstractCegarLoop]: Abstraction has has 87 places, 372 transitions, 5414 flow [2021-08-13 02:36:29,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.125) internal successors, (57), 8 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,212 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:29,212 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:29,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-13 02:36:29,212 INFO L430 AbstractCegarLoop]: === Iteration 7 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:29,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:29,212 INFO L82 PathProgramCache]: Analyzing trace with hash 1934440940, now seen corresponding path program 1 times [2021-08-13 02:36:29,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:29,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364819188] [2021-08-13 02:36:29,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:29,221 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,221 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:29,223 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,223 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:29,227 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,227 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:29,231 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,231 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:29,235 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,235 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:29,237 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,237 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:29,242 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:29,242 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:29,247 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 02:36:29,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:29,247 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364819188] [2021-08-13 02:36:29,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364819188] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:29,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:29,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 02:36:29,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325219861] [2021-08-13 02:36:29,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 02:36:29,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:29,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 02:36:29,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 02:36:29,248 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:29,248 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 372 transitions, 5414 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:29,248 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:29,248 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:29,248 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:30,481 INFO L129 PetriNetUnfolder]: 6758/12250 cut-off events. [2021-08-13 02:36:30,481 INFO L130 PetriNetUnfolder]: For 6198/6198 co-relation queries the response was YES. [2021-08-13 02:36:30,504 INFO L84 FinitePrefix]: Finished finitePrefix Result has 85743 conditions, 12250 events. 6758/12250 cut-off events. For 6198/6198 co-relation queries the response was YES. Maximal size of possible extension queue 1097. Compared 103443 event pairs, 964 based on Foata normal form. 0/9593 useless extension candidates. Maximal degree in co-relation 11644. Up to 9781 conditions per place. [2021-08-13 02:36:30,585 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 283 selfloop transitions, 140 changer transitions 0/429 dead transitions. [2021-08-13 02:36:30,585 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 429 transitions, 7085 flow [2021-08-13 02:36:30,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-13 02:36:30,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2021-08-13 02:36:30,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 211 transitions. [2021-08-13 02:36:30,586 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5626666666666666 [2021-08-13 02:36:30,586 INFO L72 ComplementDD]: Start complementDD. Operand 15 states and 211 transitions. [2021-08-13 02:36:30,587 INFO L73 IsDeterministic]: Start isDeterministic. Operand 15 states and 211 transitions. [2021-08-13 02:36:30,587 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:30,587 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 15 states and 211 transitions. [2021-08-13 02:36:30,587 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 16 states, 15 states have (on average 14.066666666666666) internal successors, (211), 15 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,588 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 16 states, 16 states have (on average 25.0) internal successors, (400), 16 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,588 INFO L81 ComplementDD]: Finished complementDD. Result has 16 states, 16 states have (on average 25.0) internal successors, (400), 16 states have internal predecessors, (400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,589 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 67 predicate places. [2021-08-13 02:36:30,589 INFO L482 AbstractCegarLoop]: Abstraction has has 101 places, 429 transitions, 7085 flow [2021-08-13 02:36:30,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,589 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:30,589 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:30,589 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-13 02:36:30,589 INFO L430 AbstractCegarLoop]: === Iteration 8 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:30,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:30,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1884882076, now seen corresponding path program 1 times [2021-08-13 02:36:30,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:30,590 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995881491] [2021-08-13 02:36:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:30,615 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,616 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:30,618 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,619 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:30,622 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,622 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:30,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,626 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:30,626 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,627 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:30,630 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,630 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:30,635 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:30,635 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:30,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-13 02:36:30,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:30,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995881491] [2021-08-13 02:36:30,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995881491] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:30,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:30,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-08-13 02:36:30,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453476660] [2021-08-13 02:36:30,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-08-13 02:36:30,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:30,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-13 02:36:30,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-08-13 02:36:30,642 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:30,642 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 429 transitions, 7085 flow. Second operand has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:30,642 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:30,642 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:30,642 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:32,513 INFO L129 PetriNetUnfolder]: 8781/16344 cut-off events. [2021-08-13 02:36:32,513 INFO L130 PetriNetUnfolder]: For 8986/8986 co-relation queries the response was YES. [2021-08-13 02:36:32,540 INFO L84 FinitePrefix]: Finished finitePrefix Result has 125673 conditions, 16344 events. 8781/16344 cut-off events. For 8986/8986 co-relation queries the response was YES. Maximal size of possible extension queue 1567. Compared 149994 event pairs, 1208 based on Foata normal form. 0/12756 useless extension candidates. Maximal degree in co-relation 17216. Up to 12772 conditions per place. [2021-08-13 02:36:32,634 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 357 selfloop transitions, 215 changer transitions 0/578 dead transitions. [2021-08-13 02:36:32,634 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 578 transitions, 10667 flow [2021-08-13 02:36:32,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-13 02:36:32,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2021-08-13 02:36:32,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 178 transitions. [2021-08-13 02:36:32,635 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.5933333333333334 [2021-08-13 02:36:32,635 INFO L72 ComplementDD]: Start complementDD. Operand 12 states and 178 transitions. [2021-08-13 02:36:32,635 INFO L73 IsDeterministic]: Start isDeterministic. Operand 12 states and 178 transitions. [2021-08-13 02:36:32,635 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:32,635 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 12 states and 178 transitions. [2021-08-13 02:36:32,636 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 13 states, 12 states have (on average 14.833333333333334) internal successors, (178), 12 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) [2021-08-13 02:36:32,636 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,637 INFO L81 ComplementDD]: Finished complementDD. Result has 13 states, 13 states have (on average 25.0) internal successors, (325), 13 states have internal predecessors, (325), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,637 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 78 predicate places. [2021-08-13 02:36:32,637 INFO L482 AbstractCegarLoop]: Abstraction has has 112 places, 578 transitions, 10667 flow [2021-08-13 02:36:32,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 7.25) internal successors, (58), 8 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,637 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:32,637 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:32,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-08-13 02:36:32,637 INFO L430 AbstractCegarLoop]: === Iteration 9 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:32,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:32,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1934758070, now seen corresponding path program 2 times [2021-08-13 02:36:32,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:32,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492754344] [2021-08-13 02:36:32,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-13 02:36:32,643 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,643 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:32,645 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,645 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:32,647 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,648 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:32,651 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,651 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:32,654 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,655 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:32,658 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,659 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 5 [2021-08-13 02:36:32,663 INFO L142 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size [2021-08-13 02:36:32,663 INFO L147 QuantifierPusher]: treesize reduction 0, result has 100.0 percent of original size 3 [2021-08-13 02:36:32,668 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-13 02:36:32,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-13 02:36:32,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492754344] [2021-08-13 02:36:32,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492754344] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-13 02:36:32,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-13 02:36:32,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-13 02:36:32,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684252608] [2021-08-13 02:36:32,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-08-13 02:36:32,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-13 02:36:32,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-13 02:36:32,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-08-13 02:36:32,669 INFO L513 CegarLoopForPetriNet]: Number of universal loopers: 6 out of 25 [2021-08-13 02:36:32,669 INFO L92 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 578 transitions, 10667 flow. Second operand has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:32,669 INFO L101 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2021-08-13 02:36:32,669 INFO L102 encePairwiseOnDemand]: Number of universal subtrahend loopers: 6 of 25 [2021-08-13 02:36:32,669 INFO L74 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2021-08-13 02:36:34,499 INFO L129 PetriNetUnfolder]: 8595/15915 cut-off events. [2021-08-13 02:36:34,500 INFO L130 PetriNetUnfolder]: For 8306/8306 co-relation queries the response was YES. [2021-08-13 02:36:34,523 INFO L84 FinitePrefix]: Finished finitePrefix Result has 135501 conditions, 15915 events. 8595/15915 cut-off events. For 8306/8306 co-relation queries the response was YES. Maximal size of possible extension queue 1539. Compared 144328 event pairs, 1452 based on Foata normal form. 0/12399 useless extension candidates. Maximal degree in co-relation 14275. Up to 12520 conditions per place. [2021-08-13 02:36:34,700 INFO L132 encePairwiseOnDemand]: 16/25 looper letters, 416 selfloop transitions, 153 changer transitions 0/575 dead transitions. [2021-08-13 02:36:34,700 INFO L138 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 125 places, 575 transitions, 11751 flow [2021-08-13 02:36:34,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-13 02:36:34,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2021-08-13 02:36:34,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 203 transitions. [2021-08-13 02:36:34,702 INFO L558 CegarLoopForPetriNet]: DFA transition density 0.58 [2021-08-13 02:36:34,702 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 203 transitions. [2021-08-13 02:36:34,702 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 203 transitions. [2021-08-13 02:36:34,702 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2021-08-13 02:36:34,702 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 203 transitions. [2021-08-13 02:36:34,702 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 14.5) internal successors, (203), 14 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,703 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 25.0) internal successors, (375), 15 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,703 INFO L348 CegarLoopForPetriNet]: 34 programPoint places, 91 predicate places. [2021-08-13 02:36:34,703 INFO L482 AbstractCegarLoop]: Abstraction has has 125 places, 575 transitions, 11751 flow [2021-08-13 02:36:34,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 7.111111111111111) internal successors, (64), 9 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-13 02:36:34,703 INFO L258 CegarLoopForPetriNet]: Found error trace [2021-08-13 02:36:34,703 INFO L266 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-13 02:36:34,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2021-08-13 02:36:34,703 INFO L430 AbstractCegarLoop]: === Iteration 10 === [threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, threadErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, threadErr0ASSERT_VIOLATIONASSERT]=== [2021-08-13 02:36:34,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-13 02:36:34,704 INFO L82 PathProgramCache]: Analyzing trace with hash 861015774, now seen corresponding path program 1 times [2021-08-13 02:36:34,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-13 02:36:34,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087643477] [2021-08-13 02:36:34,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-13 02:36:34,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:34,706 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-08-13 02:36:34,708 INFO L223 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-08-13 02:36:34,709 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-08-13 02:36:34,709 INFO L651 BasicCegarLoop]: Counterexample might be feasible [2021-08-13 02:36:34,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-08-13 02:36:34,711 INFO L239 ceAbstractionStarter]: Analysis of concurrent program completed with 4 thread instances [2021-08-13 02:36:34,718 INFO L202 PluginConnector]: Adding new model fork_loop_unsafe.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.08 02:36:34 BasicIcfg [2021-08-13 02:36:34,718 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-13 02:36:34,719 INFO L168 Benchmark]: Toolchain (without parser) took 12876.68 ms. Allocated memory was 207.6 MB in the beginning and 3.8 GB in the end (delta: 3.6 GB). Free memory was 187.6 MB in the beginning and 3.1 GB in the end (delta: -2.9 GB). Peak memory consumption was 665.4 MB. Max. memory is 8.0 GB. [2021-08-13 02:36:34,719 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 207.6 MB. Free memory is still 188.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-13 02:36:34,719 INFO L168 Benchmark]: Boogie Procedure Inliner took 23.37 ms. Allocated memory is still 207.6 MB. Free memory was 187.6 MB in the beginning and 186.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 02:36:34,719 INFO L168 Benchmark]: Boogie Preprocessor took 9.77 ms. Allocated memory is still 207.6 MB. Free memory was 186.1 MB in the beginning and 185.2 MB in the end (delta: 894.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-13 02:36:34,719 INFO L168 Benchmark]: RCFGBuilder took 146.07 ms. Allocated memory is still 207.6 MB. Free memory was 185.2 MB in the beginning and 176.6 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2021-08-13 02:36:34,719 INFO L168 Benchmark]: TraceAbstraction took 12693.76 ms. Allocated memory was 207.6 MB in the beginning and 3.8 GB in the end (delta: 3.6 GB). Free memory was 176.2 MB in the beginning and 3.1 GB in the end (delta: -2.9 GB). Peak memory consumption was 653.8 MB. Max. memory is 8.0 GB. [2021-08-13 02:36:34,719 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 0.16 ms. Allocated memory is still 207.6 MB. Free memory is still 188.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 23.37 ms. Allocated memory is still 207.6 MB. Free memory was 187.6 MB in the beginning and 186.1 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 9.77 ms. Allocated memory is still 207.6 MB. Free memory was 186.1 MB in the beginning and 185.2 MB in the end (delta: 894.3 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 146.07 ms. Allocated memory is still 207.6 MB. Free memory was 185.2 MB in the beginning and 176.6 MB in the end (delta: 8.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. * TraceAbstraction took 12693.76 ms. Allocated memory was 207.6 MB in the beginning and 3.8 GB in the end (delta: 3.6 GB). Free memory was 176.2 MB in the beginning and 3.1 GB in the end (delta: -2.9 GB). Peak memory consumption was 653.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 17]: assertion can be violated assertion can be violated We found a FailurePath: [L24] 0 x := 0; VAL [x=0] [L25] 0 i := 0; VAL [i=0, x=0] [L28] FORK 0 fork i thread(i); VAL [i=0, x=0, y=0] [L29] 0 i := i + 1; VAL [i=1, x=0, y=0] [L16] 1 x := x + 1; VAL [i=1, x=1, y=0] [L28] FORK 0 fork i thread(i); VAL [i=1, x=1, y=0] [L29] 0 i := i + 1; VAL [i=2, x=1, y=0] [L16] 2 x := x + 1; VAL [i=2, x=2, y=0] [L28] FORK 0 fork i thread(i); VAL [i=2, x=2, y=0] [L16] 3 x := x + 1; VAL [i=2, x=3, y=0] [L17] 1 assert x <= y + 2; VAL [i=2, x=3, y=0] - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 3 procedures, 16 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 2.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 417.9ms, OverallIterations: 2, TraceHistogramMax: 1, EmptinessCheckTime: 0.0ms, AutomataDifference: 125.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 21.6ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2 SDtfs, 5 SDslu, 4 SDs, 0 SdLazy, 14 SolverSat, 4 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 32.0ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 109.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=39occurred in iteration=1, InterpolantAutomatonStates: 6, 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: 3.8ms SsaConstructionTime, 24.4ms SatisfiabilityAnalysisTime, 145.0ms InterpolantComputationTime, 10 NumberOfCodeBlocks, 10 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data with 2 thread instances CFG has 4 procedures, 21 locations, 4 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 164.5ms, OverallIterations: 2, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 109.8ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 4.7ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3 SDtfs, 11 SDslu, 7 SDs, 0 SdLazy, 37 SolverSat, 5 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 26.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=101occurred in iteration=1, InterpolantAutomatonStates: 6, 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: 2.2ms SsaConstructionTime, 8.0ms SatisfiabilityAnalysisTime, 23.8ms InterpolantComputationTime, 12 NumberOfCodeBlocks, 12 NumberOfCodeBlocksAsserted, 2 NumberOfCheckSat, 4 ConstructedInterpolants, 0 QuantifiedInterpolants, 14 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 1 InterpolantComputations, 1 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 - StatisticsResult: Ultimate Automizer benchmark data with 3 thread instances CFG has 5 procedures, 26 locations, 5 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 1.5ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 1958.0ms, OverallIterations: 7, TraceHistogramMax: 3, EmptinessCheckTime: 0.0ms, AutomataDifference: 1222.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 9.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 25 SDtfs, 229 SDslu, 44 SDs, 0 SdLazy, 691 SolverSat, 105 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 327.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 66 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 296.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=2253occurred in iteration=6, InterpolantAutomatonStates: 59, 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: 6.6ms SsaConstructionTime, 62.9ms SatisfiabilityAnalysisTime, 349.8ms InterpolantComputationTime, 61 NumberOfCodeBlocks, 61 NumberOfCodeBlocksAsserted, 8 NumberOfCheckSat, 45 ConstructedInterpolants, 0 QuantifiedInterpolants, 183 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 7 InterpolantComputations, 5 PerfectInterpolantSequences, 4/6 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 - StatisticsResult: Ultimate Automizer benchmark data with 4 thread instances CFG has 6 procedures, 31 locations, 6 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.4ms, RemoveRedundantFlowTime: 0.0ms, RemoveRedundantFlowUnfoldingTime: 0.0ms, BackfoldingTime: 0.0ms, BackfoldingUnfoldingTime: 0.0ms, FlowIncreaseByBackfolding: 0, BasicCegarLoop: VerificationResult: UNSAFE, OverallTime: 10031.3ms, OverallIterations: 10, TraceHistogramMax: 2, EmptinessCheckTime: 0.0ms, AutomataDifference: 9208.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3.1ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 38 SDtfs, 567 SDslu, 76 SDs, 0 SdLazy, 1726 SolverSat, 250 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 772.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 110 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 495.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=11751occurred in iteration=9, InterpolantAutomatonStates: 100, 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: 5.3ms SsaConstructionTime, 110.8ms SatisfiabilityAnalysisTime, 423.1ms InterpolantComputationTime, 94 NumberOfCodeBlocks, 94 NumberOfCodeBlocksAsserted, 11 NumberOfCheckSat, 73 ConstructedInterpolants, 0 QuantifiedInterpolants, 301 SizeOfPredicates, 1 NumberOfNonLiveVariables, 21 ConjunctsInSsa, 6 ConjunctsInUnsatCore, 10 InterpolantComputations, 8 PerfectInterpolantSequences, 19/21 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...