/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:00:47,456 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:00:47,459 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:00:47,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:00:47,504 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:00:47,513 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:00:47,515 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:00:47,519 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:00:47,521 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:00:47,524 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:00:47,525 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:00:47,526 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:00:47,526 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:00:47,529 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:00:47,531 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:00:47,534 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:00:47,535 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:00:47,537 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:00:47,538 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:00:47,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:00:47,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:00:47,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:00:47,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:00:47,551 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:00:47,564 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:00:47,565 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:00:47,565 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:00:47,568 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:00:47,568 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:00:47,569 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:00:47,569 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:00:47,570 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:00:47,570 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:00:47,576 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:00:47,577 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:00:47,578 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:00:47,578 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:00:47,578 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:00:47,579 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:00:47,582 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:00:47,583 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:00:47,583 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 20:00:47,620 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:00:47,620 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:00:47,622 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:00:47,623 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:00:47,623 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:00:47,623 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:00:47,623 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:00:47,624 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:00:47,624 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:00:47,624 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:00:47,625 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:00:47,625 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:00:47,625 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:00:47,626 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:00:47,626 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:00:47,626 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:00:47,626 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:00:47,626 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:00:47,627 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:00:47,627 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:00:47,627 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:00:47,627 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:00:47,627 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:00:47,628 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:00:47,628 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:00:47,628 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:00:47,628 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:00:47,628 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:00:47,629 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:00:47,629 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 20:00:47,959 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:00:47,976 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:00:47,982 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:00:47,984 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:00:47,984 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:00:47,985 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 20:00:48,057 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccb440858/0f1c773603c54ffb896a4aca19ba1cf6/FLAGce0c18d91 [2020-10-12 20:00:48,570 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:00:48,571 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 20:00:48,591 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccb440858/0f1c773603c54ffb896a4aca19ba1cf6/FLAGce0c18d91 [2020-10-12 20:00:48,866 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ccb440858/0f1c773603c54ffb896a4aca19ba1cf6 [2020-10-12 20:00:48,876 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:00:48,878 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:00:48,881 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:00:48,881 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:00:48,884 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:00:48,885 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:00:48" (1/1) ... [2020-10-12 20:00:48,889 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b8831ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:48, skipping insertion in model container [2020-10-12 20:00:48,889 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:00:48" (1/1) ... [2020-10-12 20:00:48,898 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:00:48,965 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:00:49,278 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:00:49,290 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:00:49,482 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:00:49,503 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:00:49,504 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49 WrapperNode [2020-10-12 20:00:49,504 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:00:49,505 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:00:49,505 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:00:49,505 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:00:49,515 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (1/1) ... [2020-10-12 20:00:49,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (1/1) ... [2020-10-12 20:00:49,534 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (1/1) ... [2020-10-12 20:00:49,535 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (1/1) ... [2020-10-12 20:00:49,570 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (1/1) ... [2020-10-12 20:00:49,582 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (1/1) ... [2020-10-12 20:00:49,589 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (1/1) ... [2020-10-12 20:00:49,601 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:00:49,601 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:00:49,601 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:00:49,602 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:00:49,603 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-10-12 20:00:49,674 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:00:49,675 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:00:49,675 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:00:49,675 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:00:49,675 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:00:49,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:00:49,676 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:00:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:00:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:00:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:00:49,677 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:00:49,678 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:00:49,678 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:00:49,678 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:00:49,678 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:00:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:00:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:00:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:00:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:00:49,679 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:00:49,680 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:00:50,452 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:00:50,453 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:00:50,459 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:00:50 BoogieIcfgContainer [2020-10-12 20:00:50,459 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:00:50,461 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:00:50,461 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:00:50,465 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:00:50,465 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:00:48" (1/3) ... [2020-10-12 20:00:50,466 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0d457a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:00:50, skipping insertion in model container [2020-10-12 20:00:50,466 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:00:49" (2/3) ... [2020-10-12 20:00:50,467 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f0d457a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:00:50, skipping insertion in model container [2020-10-12 20:00:50,467 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:00:50" (3/3) ... [2020-10-12 20:00:50,469 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.2.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2020-10-12 20:00:50,481 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:00:50,489 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:00:50,504 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:00:50,531 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:00:50,532 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:00:50,532 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:00:50,532 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:00:50,533 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:00:50,533 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:00:50,533 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:00:50,533 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:00:50,558 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states. [2020-10-12 20:00:50,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-12 20:00:50,569 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:50,570 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:00:50,571 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:50,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:50,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1190529644, now seen corresponding path program 1 times [2020-10-12 20:00:50,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:50,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537913253] [2020-10-12 20:00:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:51,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:51,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:52,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:52,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-12 20:00:52,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:00:52,907 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1939 [2020-10-12 20:00:52,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:52,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:00:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:00:52,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 20:00:52,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 20:00:53,218 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:00:53,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:53,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:53,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:53,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:53,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:53,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:53,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:00:53,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:53,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:00:53,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:53,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:00:53,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:53,270 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537913253] [2020-10-12 20:00:53,272 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:00:53,273 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:00:53,273 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189866703] [2020-10-12 20:00:53,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:00:53,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:53,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:00:53,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:00:53,297 INFO L87 Difference]: Start difference. First operand 176 states. Second operand 7 states. [2020-10-12 20:00:53,565 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 20:00:54,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:54,496 INFO L93 Difference]: Finished difference Result 616 states and 991 transitions. [2020-10-12 20:00:54,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:00:54,498 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 68 [2020-10-12 20:00:54,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:54,518 INFO L225 Difference]: With dead ends: 616 [2020-10-12 20:00:54,518 INFO L226 Difference]: Without dead ends: 516 [2020-10-12 20:00:54,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:00:54,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-12 20:00:54,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 265. [2020-10-12 20:00:54,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-12 20:00:54,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 394 transitions. [2020-10-12 20:00:54,602 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 394 transitions. Word has length 68 [2020-10-12 20:00:54,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:54,603 INFO L479 AbstractCegarLoop]: Abstraction has 265 states and 394 transitions. [2020-10-12 20:00:54,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:00:54,604 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 394 transitions. [2020-10-12 20:00:54,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 20:00:54,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:54,608 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:00:54,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:00:54,610 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:54,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:54,611 INFO L82 PathProgramCache]: Analyzing trace with hash -2007858360, now seen corresponding path program 1 times [2020-10-12 20:00:54,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:54,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680589846] [2020-10-12 20:00:54,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:54,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:54,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:55,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:55,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-12 20:00:55,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:00:55,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-12 20:00:55,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 20:00:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 20:00:55,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 20:00:55,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:55,634 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:00:55,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:55,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:55,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:55,650 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:55,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:55,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:55,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:00:55,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:55,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:00:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:55,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:00:55,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:00:55,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:55,683 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680589846] [2020-10-12 20:00:55,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:00:55,683 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:00:55,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907321649] [2020-10-12 20:00:55,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 20:00:55,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:55,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 20:00:55,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:00:55,686 INFO L87 Difference]: Start difference. First operand 265 states and 394 transitions. Second operand 7 states. [2020-10-12 20:00:56,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:56,892 INFO L93 Difference]: Finished difference Result 973 states and 1490 transitions. [2020-10-12 20:00:56,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:00:56,893 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 20:00:56,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:56,898 INFO L225 Difference]: With dead ends: 973 [2020-10-12 20:00:56,899 INFO L226 Difference]: Without dead ends: 771 [2020-10-12 20:00:56,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:00:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 771 states. [2020-10-12 20:00:56,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 771 to 765. [2020-10-12 20:00:56,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 765 states. [2020-10-12 20:00:56,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 765 states to 765 states and 1161 transitions. [2020-10-12 20:00:56,985 INFO L78 Accepts]: Start accepts. Automaton has 765 states and 1161 transitions. Word has length 69 [2020-10-12 20:00:56,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:56,985 INFO L479 AbstractCegarLoop]: Abstraction has 765 states and 1161 transitions. [2020-10-12 20:00:56,986 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 20:00:56,986 INFO L276 IsEmpty]: Start isEmpty. Operand 765 states and 1161 transitions. [2020-10-12 20:00:57,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:00:57,012 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:57,012 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:00:57,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:00:57,013 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:57,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:57,013 INFO L82 PathProgramCache]: Analyzing trace with hash 525305437, now seen corresponding path program 1 times [2020-10-12 20:00:57,014 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:57,014 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625996039] [2020-10-12 20:00:57,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:57,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:57,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:57,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:57,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:57,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:00:57,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:00:57,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 543 [2020-10-12 20:00:57,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:00:57,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:00:57,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 20:00:57,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:00:57,760 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:00:57,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:57,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:57,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:57,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:57,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:57,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 20:00:57,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:57,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:00:57,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:57,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:00:57,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:00:57,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:57,825 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625996039] [2020-10-12 20:00:57,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:00:57,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:00:57,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572218333] [2020-10-12 20:00:57,827 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:00:57,827 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:57,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:00:57,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:00:57,828 INFO L87 Difference]: Start difference. First operand 765 states and 1161 transitions. Second operand 6 states. [2020-10-12 20:00:58,019 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 20:00:58,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:00:58,710 INFO L93 Difference]: Finished difference Result 2043 states and 3137 transitions. [2020-10-12 20:00:58,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:00:58,711 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:00:58,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:00:58,719 INFO L225 Difference]: With dead ends: 2043 [2020-10-12 20:00:58,719 INFO L226 Difference]: Without dead ends: 1329 [2020-10-12 20:00:58,722 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:00:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1329 states. [2020-10-12 20:00:58,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1329 to 1327. [2020-10-12 20:00:58,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1327 states. [2020-10-12 20:00:58,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 2020 transitions. [2020-10-12 20:00:58,812 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 2020 transitions. Word has length 70 [2020-10-12 20:00:58,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:00:58,813 INFO L479 AbstractCegarLoop]: Abstraction has 1327 states and 2020 transitions. [2020-10-12 20:00:58,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:00:58,813 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 2020 transitions. [2020-10-12 20:00:58,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:00:58,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:00:58,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:00:58,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:00:58,816 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:00:58,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:00:58,817 INFO L82 PathProgramCache]: Analyzing trace with hash -68488321, now seen corresponding path program 1 times [2020-10-12 20:00:58,817 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:00:58,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277747049] [2020-10-12 20:00:58,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:00:58,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:58,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:58,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:59,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:59,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:00:59,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:00:59,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 549 [2020-10-12 20:00:59,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:59,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:00:59,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:00:59,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-12 20:00:59,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:00:59,600 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:00:59,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:00:59,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:00:59,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:00:59,635 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:00:59,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:00:59,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:00:59,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-12 20:00:59,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:00:59,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:00:59,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:00:59,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:00:59,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:00:59,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:00:59,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277747049] [2020-10-12 20:00:59,664 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:00:59,664 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:00:59,664 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471544612] [2020-10-12 20:00:59,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:00:59,665 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:00:59,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:00:59,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:00:59,666 INFO L87 Difference]: Start difference. First operand 1327 states and 2020 transitions. Second operand 6 states. [2020-10-12 20:00:59,823 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 20:01:00,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:00,613 INFO L93 Difference]: Finished difference Result 3523 states and 5406 transitions. [2020-10-12 20:01:00,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:01:00,614 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:01:00,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:00,626 INFO L225 Difference]: With dead ends: 3523 [2020-10-12 20:01:00,627 INFO L226 Difference]: Without dead ends: 2297 [2020-10-12 20:01:00,630 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:01:00,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2297 states. [2020-10-12 20:01:00,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2297 to 2295. [2020-10-12 20:01:00,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2295 states. [2020-10-12 20:01:00,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2295 states to 2295 states and 3492 transitions. [2020-10-12 20:01:00,781 INFO L78 Accepts]: Start accepts. Automaton has 2295 states and 3492 transitions. Word has length 70 [2020-10-12 20:01:00,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:00,782 INFO L479 AbstractCegarLoop]: Abstraction has 2295 states and 3492 transitions. [2020-10-12 20:01:00,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:01:00,782 INFO L276 IsEmpty]: Start isEmpty. Operand 2295 states and 3492 transitions. [2020-10-12 20:01:00,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-12 20:01:00,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:00,784 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:00,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:01:00,785 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:00,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:00,785 INFO L82 PathProgramCache]: Analyzing trace with hash 1765795566, now seen corresponding path program 1 times [2020-10-12 20:01:00,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:00,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1945573226] [2020-10-12 20:01:00,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:00,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:00,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:00,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:01,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:01,394 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-12 20:01:01,394 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:01:01,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 580 [2020-10-12 20:01:01,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:01:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:01,395 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-12 20:01:01,396 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:01,641 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:01,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:01,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:01,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:01,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:01,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:01,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 20:01:01,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:01,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:01,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:01,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:01,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:01,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:01,702 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1945573226] [2020-10-12 20:01:01,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:01,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:01:01,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180640750] [2020-10-12 20:01:01,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:01:01,704 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:01,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:01:01,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:01:01,704 INFO L87 Difference]: Start difference. First operand 2295 states and 3492 transitions. Second operand 6 states. [2020-10-12 20:01:01,906 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 20:01:02,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:02,958 INFO L93 Difference]: Finished difference Result 6502 states and 9923 transitions. [2020-10-12 20:01:02,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:01:02,958 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 70 [2020-10-12 20:01:02,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:02,989 INFO L225 Difference]: With dead ends: 6502 [2020-10-12 20:01:02,989 INFO L226 Difference]: Without dead ends: 4281 [2020-10-12 20:01:02,998 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:01:03,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4281 states. [2020-10-12 20:01:03,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4281 to 4279. [2020-10-12 20:01:03,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4279 states. [2020-10-12 20:01:03,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4279 states to 4279 states and 6476 transitions. [2020-10-12 20:01:03,475 INFO L78 Accepts]: Start accepts. Automaton has 4279 states and 6476 transitions. Word has length 70 [2020-10-12 20:01:03,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:03,476 INFO L479 AbstractCegarLoop]: Abstraction has 4279 states and 6476 transitions. [2020-10-12 20:01:03,476 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:01:03,476 INFO L276 IsEmpty]: Start isEmpty. Operand 4279 states and 6476 transitions. [2020-10-12 20:01:03,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:01:03,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:03,482 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:03,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:01:03,482 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:03,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1997372051, now seen corresponding path program 1 times [2020-10-12 20:01:03,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:03,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [171043164] [2020-10-12 20:01:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:03,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:03,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:03,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:03,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:05,925 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:05,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:01:05,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:01:05,926 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2397 [2020-10-12 20:01:05,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:01:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:05,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 20:01:05,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:06,179 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:06,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:06,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:06,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:06,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:06,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:06,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:06,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 20:01:06,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:06,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:06,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:06,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:06,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:06,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:06,230 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [171043164] [2020-10-12 20:01:06,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:06,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:01:06,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994666601] [2020-10-12 20:01:06,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:01:06,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:06,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:01:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:01:06,232 INFO L87 Difference]: Start difference. First operand 4279 states and 6476 transitions. Second operand 11 states. [2020-10-12 20:01:06,446 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 20:01:09,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:09,713 INFO L93 Difference]: Finished difference Result 19952 states and 30223 transitions. [2020-10-12 20:01:09,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 20:01:09,713 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-12 20:01:09,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:09,807 INFO L225 Difference]: With dead ends: 19952 [2020-10-12 20:01:09,808 INFO L226 Difference]: Without dead ends: 16942 [2020-10-12 20:01:09,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=218, Invalid=652, Unknown=0, NotChecked=0, Total=870 [2020-10-12 20:01:09,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16942 states. [2020-10-12 20:01:10,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16942 to 4380. [2020-10-12 20:01:10,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4380 states. [2020-10-12 20:01:10,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 6609 transitions. [2020-10-12 20:01:10,529 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 6609 transitions. Word has length 71 [2020-10-12 20:01:10,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:10,530 INFO L479 AbstractCegarLoop]: Abstraction has 4380 states and 6609 transitions. [2020-10-12 20:01:10,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:01:10,530 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 6609 transitions. [2020-10-12 20:01:10,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:01:10,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:10,538 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:10,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:01:10,538 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:10,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:10,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1201928659, now seen corresponding path program 1 times [2020-10-12 20:01:10,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:10,540 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851666234] [2020-10-12 20:01:10,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:10,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:10,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:10,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:12,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:12,817 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:01:12,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:01:12,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2249 [2020-10-12 20:01:12,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:01:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:12,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 20:01:12,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:13,200 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:13,201 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:13,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:13,234 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:13,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:13,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:13,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-12 20:01:13,235 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:13,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:13,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:13,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:13,280 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851666234] [2020-10-12 20:01:13,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:13,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:01:13,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893695036] [2020-10-12 20:01:13,282 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:01:13,282 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:13,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:01:13,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:01:13,283 INFO L87 Difference]: Start difference. First operand 4380 states and 6609 transitions. Second operand 11 states. [2020-10-12 20:01:13,572 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 140 [2020-10-12 20:01:17,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:17,805 INFO L93 Difference]: Finished difference Result 15199 states and 22964 transitions. [2020-10-12 20:01:17,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 20:01:17,806 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-12 20:01:17,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:17,845 INFO L225 Difference]: With dead ends: 15199 [2020-10-12 20:01:17,846 INFO L226 Difference]: Without dead ends: 14037 [2020-10-12 20:01:17,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=210, Invalid=602, Unknown=0, NotChecked=0, Total=812 [2020-10-12 20:01:17,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14037 states. [2020-10-12 20:01:18,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14037 to 4380. [2020-10-12 20:01:18,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4380 states. [2020-10-12 20:01:18,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4380 states to 4380 states and 6607 transitions. [2020-10-12 20:01:18,491 INFO L78 Accepts]: Start accepts. Automaton has 4380 states and 6607 transitions. Word has length 71 [2020-10-12 20:01:18,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:18,492 INFO L479 AbstractCegarLoop]: Abstraction has 4380 states and 6607 transitions. [2020-10-12 20:01:18,492 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:01:18,492 INFO L276 IsEmpty]: Start isEmpty. Operand 4380 states and 6607 transitions. [2020-10-12 20:01:18,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:01:18,495 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:18,495 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:18,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:01:18,496 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:18,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:18,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1046256179, now seen corresponding path program 1 times [2020-10-12 20:01:18,497 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:18,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717503583] [2020-10-12 20:01:18,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:18,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:18,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:18,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:18,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:19,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:19,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:01:19,660 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:01:19,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1131 [2020-10-12 20:01:19,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 20:01:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:19,661 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 20:01:19,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:20,019 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:20,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:20,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:20,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:20,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:20,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:20,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:20,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 20:01:20,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:20,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:20,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:20,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:20,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 151 [2020-10-12 20:01:20,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:20,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717503583] [2020-10-12 20:01:20,248 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:20,248 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:01:20,248 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83529659] [2020-10-12 20:01:20,250 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 20:01:20,250 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:20,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 20:01:20,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-12 20:01:20,251 INFO L87 Difference]: Start difference. First operand 4380 states and 6607 transitions. Second operand 11 states. [2020-10-12 20:01:20,430 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 138 [2020-10-12 20:01:25,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:25,643 INFO L93 Difference]: Finished difference Result 30841 states and 46985 transitions. [2020-10-12 20:01:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 20:01:25,649 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 71 [2020-10-12 20:01:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:25,716 INFO L225 Difference]: With dead ends: 30841 [2020-10-12 20:01:25,716 INFO L226 Difference]: Without dead ends: 28783 [2020-10-12 20:01:25,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=398, Invalid=1324, Unknown=0, NotChecked=0, Total=1722 [2020-10-12 20:01:25,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28783 states. [2020-10-12 20:01:26,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28783 to 4533. [2020-10-12 20:01:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4533 states. [2020-10-12 20:01:26,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4533 states to 4533 states and 6809 transitions. [2020-10-12 20:01:26,311 INFO L78 Accepts]: Start accepts. Automaton has 4533 states and 6809 transitions. Word has length 71 [2020-10-12 20:01:26,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:26,312 INFO L479 AbstractCegarLoop]: Abstraction has 4533 states and 6809 transitions. [2020-10-12 20:01:26,312 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 20:01:26,312 INFO L276 IsEmpty]: Start isEmpty. Operand 4533 states and 6809 transitions. [2020-10-12 20:01:26,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-12 20:01:26,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:26,315 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:26,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:01:26,316 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:26,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:26,316 INFO L82 PathProgramCache]: Analyzing trace with hash 1192341100, now seen corresponding path program 1 times [2020-10-12 20:01:26,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:26,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1062152409] [2020-10-12 20:01:26,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:26,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:26,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:26,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:26,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:26,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 20:01:26,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:01:26,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 455 [2020-10-12 20:01:26,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:26,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:01:26,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:01:26,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 20:01:26,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:26,956 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:26,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:26,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:26,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:26,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:26,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:26,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:26,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-12 20:01:26,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:26,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:01:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:26,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:01:26,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:27,008 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:27,009 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1062152409] [2020-10-12 20:01:27,009 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:27,009 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:01:27,009 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546055128] [2020-10-12 20:01:27,010 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:01:27,010 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:27,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:01:27,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:01:27,011 INFO L87 Difference]: Start difference. First operand 4533 states and 6809 transitions. Second operand 6 states. [2020-10-12 20:01:27,160 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 20:01:28,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:28,501 INFO L93 Difference]: Finished difference Result 13120 states and 19757 transitions. [2020-10-12 20:01:28,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:01:28,502 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 71 [2020-10-12 20:01:28,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:28,519 INFO L225 Difference]: With dead ends: 13120 [2020-10-12 20:01:28,519 INFO L226 Difference]: Without dead ends: 8640 [2020-10-12 20:01:28,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:01:28,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8640 states. [2020-10-12 20:01:29,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8640 to 8638. [2020-10-12 20:01:29,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8638 states. [2020-10-12 20:01:29,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8638 states to 8638 states and 12941 transitions. [2020-10-12 20:01:29,423 INFO L78 Accepts]: Start accepts. Automaton has 8638 states and 12941 transitions. Word has length 71 [2020-10-12 20:01:29,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:29,423 INFO L479 AbstractCegarLoop]: Abstraction has 8638 states and 12941 transitions. [2020-10-12 20:01:29,423 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:01:29,424 INFO L276 IsEmpty]: Start isEmpty. Operand 8638 states and 12941 transitions. [2020-10-12 20:01:29,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-12 20:01:29,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:29,428 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:29,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:01:29,428 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:29,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:29,429 INFO L82 PathProgramCache]: Analyzing trace with hash 11148810, now seen corresponding path program 1 times [2020-10-12 20:01:29,429 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:29,429 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1608572453] [2020-10-12 20:01:29,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:29,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:29,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:29,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:29,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-12 20:01:29,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:29,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-12 20:01:29,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:29,593 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:01:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 74 [2020-10-12 20:01:29,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:01:29,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:29,760 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:29,761 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:29,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:29,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:29,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:29,779 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:29,779 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:29,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:01:29,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:29,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:29,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:29,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:29,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:29,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:29,802 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1608572453] [2020-10-12 20:01:29,802 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:29,802 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:01:29,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350257978] [2020-10-12 20:01:29,804 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:01:29,804 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:29,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:01:29,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:01:29,805 INFO L87 Difference]: Start difference. First operand 8638 states and 12941 transitions. Second operand 5 states. [2020-10-12 20:01:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:33,243 INFO L93 Difference]: Finished difference Result 16432 states and 24638 transitions. [2020-10-12 20:01:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:01:33,243 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 72 [2020-10-12 20:01:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:33,264 INFO L225 Difference]: With dead ends: 16432 [2020-10-12 20:01:33,265 INFO L226 Difference]: Without dead ends: 16430 [2020-10-12 20:01:33,271 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:01:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16430 states. [2020-10-12 20:01:34,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16430 to 8894. [2020-10-12 20:01:34,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8894 states. [2020-10-12 20:01:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8894 states to 8894 states and 13197 transitions. [2020-10-12 20:01:34,255 INFO L78 Accepts]: Start accepts. Automaton has 8894 states and 13197 transitions. Word has length 72 [2020-10-12 20:01:34,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:34,255 INFO L479 AbstractCegarLoop]: Abstraction has 8894 states and 13197 transitions. [2020-10-12 20:01:34,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:01:34,256 INFO L276 IsEmpty]: Start isEmpty. Operand 8894 states and 13197 transitions. [2020-10-12 20:01:34,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:01:34,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:34,261 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:34,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:01:34,261 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:34,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:34,261 INFO L82 PathProgramCache]: Analyzing trace with hash 604047358, now seen corresponding path program 1 times [2020-10-12 20:01:34,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:34,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421371248] [2020-10-12 20:01:34,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:34,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:34,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:34,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:01:34,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:34,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 130 [2020-10-12 20:01:34,416 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:34,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:01:34,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:01:34,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-12 20:01:34,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:34,594 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:34,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:34,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:34,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:34,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:34,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:34,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:34,610 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-12 20:01:34,610 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:34,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:34,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:34,611 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:34,611 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:01:34,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:34,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421371248] [2020-10-12 20:01:34,649 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:34,650 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:01:34,650 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898687953] [2020-10-12 20:01:34,651 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:01:34,651 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:34,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:01:34,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:01:34,651 INFO L87 Difference]: Start difference. First operand 8894 states and 13197 transitions. Second operand 5 states. [2020-10-12 20:01:34,847 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 135 [2020-10-12 20:01:37,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:37,292 INFO L93 Difference]: Finished difference Result 23190 states and 34467 transitions. [2020-10-12 20:01:37,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:01:37,293 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-12 20:01:37,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:37,312 INFO L225 Difference]: With dead ends: 23190 [2020-10-12 20:01:37,312 INFO L226 Difference]: Without dead ends: 15396 [2020-10-12 20:01:37,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:01:37,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15396 states. [2020-10-12 20:01:38,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15396 to 15394. [2020-10-12 20:01:38,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15394 states. [2020-10-12 20:01:38,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15394 states to 15394 states and 22649 transitions. [2020-10-12 20:01:38,921 INFO L78 Accepts]: Start accepts. Automaton has 15394 states and 22649 transitions. Word has length 73 [2020-10-12 20:01:38,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:38,921 INFO L479 AbstractCegarLoop]: Abstraction has 15394 states and 22649 transitions. [2020-10-12 20:01:38,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:01:38,921 INFO L276 IsEmpty]: Start isEmpty. Operand 15394 states and 22649 transitions. [2020-10-12 20:01:38,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:01:38,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:38,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:38,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:01:38,928 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:38,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:38,929 INFO L82 PathProgramCache]: Analyzing trace with hash -501731091, now seen corresponding path program 1 times [2020-10-12 20:01:38,929 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:38,929 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1273982791] [2020-10-12 20:01:38,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:38,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:38,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:39,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:39,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:40,658 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:40,658 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:01:40,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:01:40,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1704 [2020-10-12 20:01:40,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:01:40,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:01:40,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 20:01:40,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:41,175 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:41,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:41,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:41,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:41,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:41,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:41,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:41,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:01:41,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:41,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:41,188 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:41,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:41,229 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1273982791] [2020-10-12 20:01:41,232 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:41,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:01:41,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456549130] [2020-10-12 20:01:41,233 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:01:41,233 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:41,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:01:41,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:01:41,236 INFO L87 Difference]: Start difference. First operand 15394 states and 22649 transitions. Second operand 10 states. [2020-10-12 20:01:41,442 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 147 [2020-10-12 20:01:54,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:01:54,424 INFO L93 Difference]: Finished difference Result 100604 states and 148627 transitions. [2020-10-12 20:01:54,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 20:01:54,425 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-12 20:01:54,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:01:54,536 INFO L225 Difference]: With dead ends: 100604 [2020-10-12 20:01:54,537 INFO L226 Difference]: Without dead ends: 96538 [2020-10-12 20:01:54,557 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=112, Invalid=394, Unknown=0, NotChecked=0, Total=506 [2020-10-12 20:01:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96538 states. [2020-10-12 20:01:56,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96538 to 15479. [2020-10-12 20:01:56,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15479 states. [2020-10-12 20:01:56,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15479 states to 15479 states and 22791 transitions. [2020-10-12 20:01:56,871 INFO L78 Accepts]: Start accepts. Automaton has 15479 states and 22791 transitions. Word has length 73 [2020-10-12 20:01:56,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:01:56,871 INFO L479 AbstractCegarLoop]: Abstraction has 15479 states and 22791 transitions. [2020-10-12 20:01:56,871 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:01:56,871 INFO L276 IsEmpty]: Start isEmpty. Operand 15479 states and 22791 transitions. [2020-10-12 20:01:56,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:01:56,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:01:56,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:01:56,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:01:56,876 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:01:56,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:01:56,877 INFO L82 PathProgramCache]: Analyzing trace with hash -1004340115, now seen corresponding path program 1 times [2020-10-12 20:01:56,877 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:01:56,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239369151] [2020-10-12 20:01:56,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:01:56,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:56,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:56,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:57,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:58,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:58,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:01:58,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:01:58,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1828 [2020-10-12 20:01:58,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:01:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:01:58,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-12 20:01:58,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:59,056 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:01:59,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:01:59,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:01:59,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:01:59,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:01:59,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:01:59,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:01:59,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:01:59,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:01:59,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:01:59,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:01:59,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:01:59,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:01:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:01:59,089 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239369151] [2020-10-12 20:01:59,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:01:59,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:01:59,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963138388] [2020-10-12 20:01:59,090 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:01:59,091 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:01:59,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:01:59,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:01:59,091 INFO L87 Difference]: Start difference. First operand 15479 states and 22791 transitions. Second operand 10 states. [2020-10-12 20:01:59,248 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 20:02:07,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:07,382 INFO L93 Difference]: Finished difference Result 64171 states and 94746 transitions. [2020-10-12 20:02:07,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 20:02:07,382 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-12 20:02:07,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:07,440 INFO L225 Difference]: With dead ends: 64171 [2020-10-12 20:02:07,440 INFO L226 Difference]: Without dead ends: 49063 [2020-10-12 20:02:07,461 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2020-10-12 20:02:07,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49063 states. [2020-10-12 20:02:11,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49063 to 20087. [2020-10-12 20:02:11,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20087 states. [2020-10-12 20:02:11,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20087 states to 20087 states and 29555 transitions. [2020-10-12 20:02:11,090 INFO L78 Accepts]: Start accepts. Automaton has 20087 states and 29555 transitions. Word has length 73 [2020-10-12 20:02:11,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:11,090 INFO L479 AbstractCegarLoop]: Abstraction has 20087 states and 29555 transitions. [2020-10-12 20:02:11,090 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:02:11,090 INFO L276 IsEmpty]: Start isEmpty. Operand 20087 states and 29555 transitions. [2020-10-12 20:02:11,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-12 20:02:11,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:11,093 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:11,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:02:11,093 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:11,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:11,094 INFO L82 PathProgramCache]: Analyzing trace with hash 1106502411, now seen corresponding path program 1 times [2020-10-12 20:02:11,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:11,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [112654283] [2020-10-12 20:02:11,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:11,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:11,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:11,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:11,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:12,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:12,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-12 20:02:12,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:02:12,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1383 [2020-10-12 20:02:12,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:12,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 20:02:12,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:02:12,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 20:02:12,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:12,830 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:02:12,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:12,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:12,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:12,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:12,840 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:12,840 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 20:02:12,840 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:12,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:02:12,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:12,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:02:12,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:12,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:12,856 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [112654283] [2020-10-12 20:02:12,856 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:12,856 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2020-10-12 20:02:12,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804994373] [2020-10-12 20:02:12,857 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 20:02:12,857 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:12,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 20:02:12,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:02:12,858 INFO L87 Difference]: Start difference. First operand 20087 states and 29555 transitions. Second operand 10 states. [2020-10-12 20:02:13,043 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 136 [2020-10-12 20:02:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:02:28,580 INFO L93 Difference]: Finished difference Result 105693 states and 156176 transitions. [2020-10-12 20:02:28,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 20:02:28,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-12 20:02:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:02:28,684 INFO L225 Difference]: With dead ends: 105693 [2020-10-12 20:02:28,684 INFO L226 Difference]: Without dead ends: 86038 [2020-10-12 20:02:28,717 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=115, Invalid=391, Unknown=0, NotChecked=0, Total=506 [2020-10-12 20:02:28,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86038 states. [2020-10-12 20:02:37,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86038 to 47247. [2020-10-12 20:02:37,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47247 states. [2020-10-12 20:02:37,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47247 states to 47247 states and 69826 transitions. [2020-10-12 20:02:37,180 INFO L78 Accepts]: Start accepts. Automaton has 47247 states and 69826 transitions. Word has length 73 [2020-10-12 20:02:37,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:02:37,180 INFO L479 AbstractCegarLoop]: Abstraction has 47247 states and 69826 transitions. [2020-10-12 20:02:37,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 20:02:37,181 INFO L276 IsEmpty]: Start isEmpty. Operand 47247 states and 69826 transitions. [2020-10-12 20:02:37,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:02:37,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:02:37,184 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:02:37,185 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:02:37,185 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:02:37,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:02:37,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1494233822, now seen corresponding path program 1 times [2020-10-12 20:02:37,185 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:02:37,186 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283395257] [2020-10-12 20:02:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:02:37,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:37,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:37,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:37,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:37,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:39,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:39,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:02:39,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:02:39,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1851 [2020-10-12 20:02:39,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:02:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:02:39,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-12 20:02:39,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:02:39,316 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:02:39,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:02:39,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:02:39,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:02:39,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:02:39,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:02:39,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:02:39,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-12 20:02:39,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:02:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:02:39,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:02:39,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:02:39,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:02:39,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:02:39,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283395257] [2020-10-12 20:02:39,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:02:39,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:02:39,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013967676] [2020-10-12 20:02:39,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:02:39,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:02:39,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:02:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:02:39,385 INFO L87 Difference]: Start difference. First operand 47247 states and 69826 transitions. Second operand 8 states. [2020-10-12 20:02:39,568 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 20:03:02,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:03:02,871 INFO L93 Difference]: Finished difference Result 174824 states and 255723 transitions. [2020-10-12 20:03:02,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 20:03:02,871 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 74 [2020-10-12 20:03:02,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:03:03,026 INFO L225 Difference]: With dead ends: 174824 [2020-10-12 20:03:03,027 INFO L226 Difference]: Without dead ends: 128595 [2020-10-12 20:03:03,072 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2020-10-12 20:03:03,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128595 states. [2020-10-12 20:03:12,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128595 to 46772. [2020-10-12 20:03:12,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46772 states. [2020-10-12 20:03:13,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46772 states to 46772 states and 68862 transitions. [2020-10-12 20:03:13,045 INFO L78 Accepts]: Start accepts. Automaton has 46772 states and 68862 transitions. Word has length 74 [2020-10-12 20:03:13,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:03:13,046 INFO L479 AbstractCegarLoop]: Abstraction has 46772 states and 68862 transitions. [2020-10-12 20:03:13,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:03:13,046 INFO L276 IsEmpty]: Start isEmpty. Operand 46772 states and 68862 transitions. [2020-10-12 20:03:13,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:03:13,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:03:13,049 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:03:13,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:03:13,049 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:03:13,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:03:13,049 INFO L82 PathProgramCache]: Analyzing trace with hash -764271808, now seen corresponding path program 1 times [2020-10-12 20:03:13,050 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:03:13,050 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531259012] [2020-10-12 20:03:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:03:13,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:13,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:13,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:13,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:13,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:13,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:14,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:15,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:15,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:03:15,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:03:15,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2423 [2020-10-12 20:03:15,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:15,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 20:03:15,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-12 20:03:15,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 20:03:15,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:15,865 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:03:15,866 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:03:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:03:15,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:03:15,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:03:15,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:03:15,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:03:15,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:03:15,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:03:15,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:03:15,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:03:15,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:03:15,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:03:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:03:15,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531259012] [2020-10-12 20:03:15,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:03:15,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-12 20:03:15,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38838485] [2020-10-12 20:03:15,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 20:03:15,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:03:15,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 20:03:15,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:03:15,893 INFO L87 Difference]: Start difference. First operand 46772 states and 68862 transitions. Second operand 12 states. [2020-10-12 20:03:16,078 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 134 [2020-10-12 20:04:08,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:04:08,759 INFO L93 Difference]: Finished difference Result 311807 states and 457154 transitions. [2020-10-12 20:04:08,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 20:04:08,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 74 [2020-10-12 20:04:08,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:04:09,162 INFO L225 Difference]: With dead ends: 311807 [2020-10-12 20:04:09,162 INFO L226 Difference]: Without dead ends: 265174 [2020-10-12 20:04:09,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=145, Invalid=557, Unknown=0, NotChecked=0, Total=702 [2020-10-12 20:04:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265174 states. [2020-10-12 20:04:33,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265174 to 118976. [2020-10-12 20:04:33,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118976 states. [2020-10-12 20:04:33,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118976 states to 118976 states and 175446 transitions. [2020-10-12 20:04:33,659 INFO L78 Accepts]: Start accepts. Automaton has 118976 states and 175446 transitions. Word has length 74 [2020-10-12 20:04:33,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:04:33,659 INFO L479 AbstractCegarLoop]: Abstraction has 118976 states and 175446 transitions. [2020-10-12 20:04:33,659 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 20:04:33,659 INFO L276 IsEmpty]: Start isEmpty. Operand 118976 states and 175446 transitions. [2020-10-12 20:04:33,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-12 20:04:33,662 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:04:33,662 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:04:33,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 20:04:33,662 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:04:33,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:04:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2014106242, now seen corresponding path program 1 times [2020-10-12 20:04:33,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:04:33,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336665449] [2020-10-12 20:04:33,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:04:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:33,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:33,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:34,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:34,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:34,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-12 20:04:34,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:04:34,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1240 [2020-10-12 20:04:34,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:04:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-12 20:04:34,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-12 20:04:34,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:04:35,235 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 127 [2020-10-12 20:04:35,236 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:04:35,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:04:35,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:04:35,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:04:35,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:04:35,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:04:35,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-12 20:04:35,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:04:35,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:04:35,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:04:35,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 20:04:35,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:04:35,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:04:35,302 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336665449] [2020-10-12 20:04:35,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:04:35,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-12 20:04:35,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424613688] [2020-10-12 20:04:35,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:04:35,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:04:35,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:04:35,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:04:35,304 INFO L87 Difference]: Start difference. First operand 118976 states and 175446 transitions. Second operand 8 states. [2020-10-12 20:04:35,520 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 134