/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.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 20:12:22,439 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 20:12:22,441 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 20:12:22,481 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 20:12:22,482 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 20:12:22,494 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 20:12:22,495 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 20:12:22,497 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 20:12:22,498 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 20:12:22,500 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 20:12:22,501 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 20:12:22,503 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 20:12:22,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 20:12:22,508 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 20:12:22,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 20:12:22,512 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 20:12:22,513 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 20:12:22,515 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 20:12:22,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 20:12:22,522 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 20:12:22,523 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 20:12:22,526 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 20:12:22,526 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 20:12:22,528 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 20:12:22,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 20:12:22,532 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 20:12:22,532 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 20:12:22,535 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 20:12:22,536 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 20:12:22,537 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 20:12:22,538 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 20:12:22,538 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 20:12:22,539 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 20:12:22,540 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 20:12:22,541 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 20:12:22,541 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 20:12:22,542 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 20:12:22,542 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 20:12:22,542 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 20:12:22,543 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 20:12:22,544 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 20:12:22,545 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 20:12:22,586 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 20:12:22,587 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 20:12:22,589 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 20:12:22,589 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 20:12:22,589 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 20:12:22,590 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 20:12:22,590 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 20:12:22,590 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 20:12:22,590 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 20:12:22,590 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 20:12:22,591 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 20:12:22,592 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 20:12:22,592 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 20:12:22,592 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 20:12:22,592 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 20:12:22,593 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 20:12:22,593 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 20:12:22,593 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 20:12:22,593 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 20:12:22,593 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 20:12:22,593 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 20:12:22,594 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 20:12:22,594 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 20:12:22,594 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 20:12:22,594 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 20:12:22,594 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 20:12:22,595 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 20:12:22,595 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 20:12:22,595 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 20:12:22,595 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 20:12:22,856 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 20:12:22,868 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 20:12:22,872 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 20:12:22,873 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 20:12:22,874 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 20:12:22,874 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:12:22,934 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11d1199c0/ca4f74c84df4487b964b58b841339e03/FLAGcc3a7351b [2020-10-12 20:12:23,437 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 20:12:23,438 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:12:23,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11d1199c0/ca4f74c84df4487b964b58b841339e03/FLAGcc3a7351b [2020-10-12 20:12:23,814 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/11d1199c0/ca4f74c84df4487b964b58b841339e03 [2020-10-12 20:12:23,822 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 20:12:23,824 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 20:12:23,825 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 20:12:23,825 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 20:12:23,828 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 20:12:23,829 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:12:23" (1/1) ... [2020-10-12 20:12:23,832 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1265c732 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:23, skipping insertion in model container [2020-10-12 20:12:23,832 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 08:12:23" (1/1) ... [2020-10-12 20:12:23,840 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 20:12:23,893 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 20:12:24,268 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:12:24,283 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 20:12:24,374 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 20:12:24,400 INFO L208 MainTranslator]: Completed translation [2020-10-12 20:12:24,400 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24 WrapperNode [2020-10-12 20:12:24,401 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 20:12:24,401 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 20:12:24,401 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 20:12:24,402 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 20:12:24,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (1/1) ... [2020-10-12 20:12:24,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (1/1) ... [2020-10-12 20:12:24,429 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (1/1) ... [2020-10-12 20:12:24,430 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (1/1) ... [2020-10-12 20:12:24,446 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (1/1) ... [2020-10-12 20:12:24,457 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (1/1) ... [2020-10-12 20:12:24,465 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (1/1) ... [2020-10-12 20:12:24,474 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 20:12:24,474 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 20:12:24,474 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 20:12:24,474 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 20:12:24,475 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (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 20:12:24,540 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 20:12:24,541 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 20:12:24,541 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-12 20:12:24,541 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 20:12:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 20:12:24,541 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-12 20:12:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-12 20:12:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uchar [2020-10-12 20:12:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-12 20:12:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-12 20:12:24,542 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-12 20:12:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-12 20:12:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-12 20:12:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-12 20:12:24,543 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-12 20:12:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-12 20:12:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure node4 [2020-10-12 20:12:24,544 INFO L130 BoogieDeclarations]: Found specification of procedure node5 [2020-10-12 20:12:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure node6 [2020-10-12 20:12:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-12 20:12:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-12 20:12:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 20:12:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 20:12:24,545 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 20:12:25,287 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 20:12:25,288 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-12 20:12:25,293 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:12:25 BoogieIcfgContainer [2020-10-12 20:12:25,293 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 20:12:25,295 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 20:12:25,295 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 20:12:25,299 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 20:12:25,299 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 08:12:23" (1/3) ... [2020-10-12 20:12:25,300 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31181043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:12:25, skipping insertion in model container [2020-10-12 20:12:25,300 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 08:12:24" (2/3) ... [2020-10-12 20:12:25,301 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31181043 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 08:12:25, skipping insertion in model container [2020-10-12 20:12:25,301 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 08:12:25" (3/3) ... [2020-10-12 20:12:25,303 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.6.2.ufo.UNBOUNDED.pals.c.v+cfa-reducer.c [2020-10-12 20:12:25,313 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 20:12:25,321 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 20:12:25,336 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 20:12:25,361 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 20:12:25,362 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 20:12:25,362 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 20:12:25,362 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 20:12:25,362 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 20:12:25,363 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 20:12:25,363 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 20:12:25,363 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 20:12:25,386 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states. [2020-10-12 20:12:25,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-12 20:12:25,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:25,399 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, 1, 1, 1] [2020-10-12 20:12:25,400 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:25,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash 717440551, now seen corresponding path program 1 times [2020-10-12 20:12:25,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:25,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991692793] [2020-10-12 20:12:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:25,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:25,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:25,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:26,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:26,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:27,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:27,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:30,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:30,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-12 20:12:30,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:12:30,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-12 20:12:30,799 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:30,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:12:30,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:12:30,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-12 20:12:30,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 20:12:31,450 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:31,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:31,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:31,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:31,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:31,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:31,522 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:31,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-12 20:12:31,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:31,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:31,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:31,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:31,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:12:31,590 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 20:12:31,590 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991692793] [2020-10-12 20:12:31,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:31,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 20:12:31,595 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016658951] [2020-10-12 20:12:31,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:12:31,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:31,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:12:31,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:12:31,623 INFO L87 Difference]: Start difference. First operand 165 states. Second operand 9 states. [2020-10-12 20:12:31,987 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification that was a NOOP. DAG size: 178 [2020-10-12 20:12:33,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:12:33,092 INFO L93 Difference]: Finished difference Result 984 states and 1562 transitions. [2020-10-12 20:12:33,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 20:12:33,097 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 77 [2020-10-12 20:12:33,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:12:33,117 INFO L225 Difference]: With dead ends: 984 [2020-10-12 20:12:33,118 INFO L226 Difference]: Without dead ends: 839 [2020-10-12 20:12:33,123 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-12 20:12:33,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2020-10-12 20:12:33,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 272. [2020-10-12 20:12:33,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-12 20:12:33,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 405 transitions. [2020-10-12 20:12:33,203 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 405 transitions. Word has length 77 [2020-10-12 20:12:33,204 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:12:33,204 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 405 transitions. [2020-10-12 20:12:33,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:12:33,205 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 405 transitions. [2020-10-12 20:12:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-12 20:12:33,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:33,209 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, 1, 1, 1, 1] [2020-10-12 20:12:33,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 20:12:33,210 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:33,210 INFO L82 PathProgramCache]: Analyzing trace with hash 747287934, now seen corresponding path program 1 times [2020-10-12 20:12:33,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:33,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726295189] [2020-10-12 20:12:33,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:33,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:33,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:33,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:33,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:33,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:37,910 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:37,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-12 20:12:37,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:12:37,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4657 [2020-10-12 20:12:37,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:37,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:12:37,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-12 20:12:37,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-12 20:12:37,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:38,155 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:38,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:38,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:38,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:38,172 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:38,172 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:38,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-12 20:12:38,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:38,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:38,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:38,174 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:38,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:38,190 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 20:12:38,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726295189] [2020-10-12 20:12:38,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:38,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:12:38,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561949488] [2020-10-12 20:12:38,193 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:12:38,193 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:38,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:12:38,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:12:38,194 INFO L87 Difference]: Start difference. First operand 272 states and 405 transitions. Second operand 5 states. [2020-10-12 20:12:39,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:12:39,220 INFO L93 Difference]: Finished difference Result 500 states and 766 transitions. [2020-10-12 20:12:39,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 20:12:39,221 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 78 [2020-10-12 20:12:39,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:12:39,225 INFO L225 Difference]: With dead ends: 500 [2020-10-12 20:12:39,225 INFO L226 Difference]: Without dead ends: 498 [2020-10-12 20:12:39,227 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:12:39,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-12 20:12:39,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 276. [2020-10-12 20:12:39,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-12 20:12:39,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 409 transitions. [2020-10-12 20:12:39,271 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 409 transitions. Word has length 78 [2020-10-12 20:12:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:12:39,273 INFO L479 AbstractCegarLoop]: Abstraction has 276 states and 409 transitions. [2020-10-12 20:12:39,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:12:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 409 transitions. [2020-10-12 20:12:39,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-12 20:12:39,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:39,282 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, 1, 1, 1, 1, 1] [2020-10-12 20:12:39,282 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 20:12:39,282 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:39,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1700709302, now seen corresponding path program 1 times [2020-10-12 20:12:39,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:39,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690872613] [2020-10-12 20:12:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:39,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:39,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:39,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:39,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:39,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:40,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:42,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:42,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-12 20:12:42,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 20:12:42,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3095 [2020-10-12 20:12:42,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:42,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:12:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 20:12:42,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-12 20:12:42,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:12:42,726 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:42,728 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:42,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:42,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:42,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:42,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:42,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:42,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-12 20:12:42,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:42,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:42,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:42,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:42,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:12:42,786 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 20:12:42,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690872613] [2020-10-12 20:12:42,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:42,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:12:42,788 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962953122] [2020-10-12 20:12:42,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:12:42,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:42,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:12:42,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:12:42,790 INFO L87 Difference]: Start difference. First operand 276 states and 409 transitions. Second operand 4 states. [2020-10-12 20:12:43,019 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:12:43,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:12:43,844 INFO L93 Difference]: Finished difference Result 700 states and 1079 transitions. [2020-10-12 20:12:43,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:12:43,845 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 79 [2020-10-12 20:12:43,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:12:43,850 INFO L225 Difference]: With dead ends: 700 [2020-10-12 20:12:43,850 INFO L226 Difference]: Without dead ends: 472 [2020-10-12 20:12:43,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:12:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2020-10-12 20:12:43,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 470. [2020-10-12 20:12:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 470 states. [2020-10-12 20:12:43,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 715 transitions. [2020-10-12 20:12:43,922 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 715 transitions. Word has length 79 [2020-10-12 20:12:43,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:12:43,924 INFO L479 AbstractCegarLoop]: Abstraction has 470 states and 715 transitions. [2020-10-12 20:12:43,924 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:12:43,924 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 715 transitions. [2020-10-12 20:12:43,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-12 20:12:43,927 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:43,927 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, 1, 1, 1, 1, 1, 1] [2020-10-12 20:12:43,928 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 20:12:43,928 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:43,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:43,928 INFO L82 PathProgramCache]: Analyzing trace with hash -352983789, now seen corresponding path program 1 times [2020-10-12 20:12:43,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:43,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1869850290] [2020-10-12 20:12:43,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:43,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:43,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:44,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:44,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:44,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:44,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:45,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:45,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-12 20:12:45,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:12:45,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1255 [2020-10-12 20:12:45,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:45,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:12:45,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 20:12:45,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 20:12:45,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-12 20:12:45,460 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:45,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:45,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:45,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:45,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:45,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:45,474 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:45,474 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:12:45,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:45,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:45,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:45,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:45,494 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 20:12:45,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1869850290] [2020-10-12 20:12:45,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:45,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:12:45,497 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684898253] [2020-10-12 20:12:45,498 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:12:45,498 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:45,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:12:45,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:12:45,499 INFO L87 Difference]: Start difference. First operand 470 states and 715 transitions. Second operand 4 states. [2020-10-12 20:12:45,701 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:12:46,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:12:46,380 INFO L93 Difference]: Finished difference Result 1250 states and 1945 transitions. [2020-10-12 20:12:46,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:12:46,381 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2020-10-12 20:12:46,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:12:46,386 INFO L225 Difference]: With dead ends: 1250 [2020-10-12 20:12:46,386 INFO L226 Difference]: Without dead ends: 828 [2020-10-12 20:12:46,388 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:12:46,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-10-12 20:12:46,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 826. [2020-10-12 20:12:46,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 826 states. [2020-10-12 20:12:46,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 826 states to 826 states and 1273 transitions. [2020-10-12 20:12:46,435 INFO L78 Accepts]: Start accepts. Automaton has 826 states and 1273 transitions. Word has length 80 [2020-10-12 20:12:46,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:12:46,436 INFO L479 AbstractCegarLoop]: Abstraction has 826 states and 1273 transitions. [2020-10-12 20:12:46,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:12:46,436 INFO L276 IsEmpty]: Start isEmpty. Operand 826 states and 1273 transitions. [2020-10-12 20:12:46,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-12 20:12:46,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:46,437 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:12:46,437 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 20:12:46,438 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:46,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:46,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1736894186, now seen corresponding path program 1 times [2020-10-12 20:12:46,438 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:46,439 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [971322209] [2020-10-12 20:12:46,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:46,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:46,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:46,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:46,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:46,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:47,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:47,059 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-12 20:12:47,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:12:47,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 596 [2020-10-12 20:12:47,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:12:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 20:12:47,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-12 20:12:47,060 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:47,252 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:47,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:47,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:47,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:47,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:47,272 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:47,272 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:12:47,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:47,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:47,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:47,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:47,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:47,291 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 20:12:47,291 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [971322209] [2020-10-12 20:12:47,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:47,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:12:47,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269236586] [2020-10-12 20:12:47,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:12:47,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:47,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:12:47,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:12:47,293 INFO L87 Difference]: Start difference. First operand 826 states and 1273 transitions. Second operand 4 states. [2020-10-12 20:12:47,483 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:12:48,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:12:48,241 INFO L93 Difference]: Finished difference Result 2254 states and 3515 transitions. [2020-10-12 20:12:48,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:12:48,242 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 81 [2020-10-12 20:12:48,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:12:48,250 INFO L225 Difference]: With dead ends: 2254 [2020-10-12 20:12:48,250 INFO L226 Difference]: Without dead ends: 1476 [2020-10-12 20:12:48,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:12:48,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1476 states. [2020-10-12 20:12:48,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1476 to 1474. [2020-10-12 20:12:48,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1474 states. [2020-10-12 20:12:48,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1474 states to 1474 states and 2281 transitions. [2020-10-12 20:12:48,333 INFO L78 Accepts]: Start accepts. Automaton has 1474 states and 2281 transitions. Word has length 81 [2020-10-12 20:12:48,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:12:48,334 INFO L479 AbstractCegarLoop]: Abstraction has 1474 states and 2281 transitions. [2020-10-12 20:12:48,334 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:12:48,334 INFO L276 IsEmpty]: Start isEmpty. Operand 1474 states and 2281 transitions. [2020-10-12 20:12:48,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-12 20:12:48,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:48,340 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:12:48,343 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 20:12:48,343 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:48,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:48,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1434875676, now seen corresponding path program 1 times [2020-10-12 20:12:48,344 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:48,344 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [310980744] [2020-10-12 20:12:48,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:48,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:48,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:48,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:48,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:48,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-12 20:12:48,741 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:12:48,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 374 [2020-10-12 20:12:48,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:48,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:12:48,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-12 20:12:48,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 20:12:48,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:12:48,971 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:48,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:48,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:48,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:48,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:48,990 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:48,990 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:48,990 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-12 20:12:48,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:48,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:48,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:48,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:48,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:49,011 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 20:12:49,011 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [310980744] [2020-10-12 20:12:49,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:49,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:12:49,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768829025] [2020-10-12 20:12:49,014 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:12:49,014 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:49,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:12:49,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:12:49,015 INFO L87 Difference]: Start difference. First operand 1474 states and 2281 transitions. Second operand 4 states. [2020-10-12 20:12:49,287 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:12:50,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:12:50,437 INFO L93 Difference]: Finished difference Result 4070 states and 6331 transitions. [2020-10-12 20:12:50,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:12:50,438 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 82 [2020-10-12 20:12:50,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:12:50,453 INFO L225 Difference]: With dead ends: 4070 [2020-10-12 20:12:50,453 INFO L226 Difference]: Without dead ends: 2644 [2020-10-12 20:12:50,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:12:50,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2644 states. [2020-10-12 20:12:50,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2644 to 2642. [2020-10-12 20:12:50,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2642 states. [2020-10-12 20:12:50,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2642 states to 2642 states and 4081 transitions. [2020-10-12 20:12:50,634 INFO L78 Accepts]: Start accepts. Automaton has 2642 states and 4081 transitions. Word has length 82 [2020-10-12 20:12:50,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:12:50,635 INFO L479 AbstractCegarLoop]: Abstraction has 2642 states and 4081 transitions. [2020-10-12 20:12:50,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:12:50,635 INFO L276 IsEmpty]: Start isEmpty. Operand 2642 states and 4081 transitions. [2020-10-12 20:12:50,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 20:12:50,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:50,636 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:12:50,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 20:12:50,637 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:50,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:50,637 INFO L82 PathProgramCache]: Analyzing trace with hash -620542284, now seen corresponding path program 1 times [2020-10-12 20:12:50,637 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:50,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1818283748] [2020-10-12 20:12:50,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:50,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:50,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:50,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:50,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:50,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-12 20:12:50,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-12 20:12:50,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 205 [2020-10-12 20:12:50,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 20:12:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:12:50,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-12 20:12:50,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:51,141 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:51,142 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:51,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:51,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:51,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:51,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:51,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-12 20:12:51,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:51,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:51,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:51,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:12:51,201 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 20:12:51,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1818283748] [2020-10-12 20:12:51,202 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:51,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 20:12:51,203 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257566994] [2020-10-12 20:12:51,203 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 20:12:51,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:51,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 20:12:51,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 20:12:51,205 INFO L87 Difference]: Start difference. First operand 2642 states and 4081 transitions. Second operand 4 states. [2020-10-12 20:12:51,546 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:12:52,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:12:52,432 INFO L93 Difference]: Finished difference Result 7606 states and 11763 transitions. [2020-10-12 20:12:52,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 20:12:52,433 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 83 [2020-10-12 20:12:52,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:12:52,464 INFO L225 Difference]: With dead ends: 7606 [2020-10-12 20:12:52,464 INFO L226 Difference]: Without dead ends: 5012 [2020-10-12 20:12:52,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:12:52,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2020-10-12 20:12:52,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4978. [2020-10-12 20:12:52,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4978 states. [2020-10-12 20:12:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4978 states to 4978 states and 7633 transitions. [2020-10-12 20:12:52,878 INFO L78 Accepts]: Start accepts. Automaton has 4978 states and 7633 transitions. Word has length 83 [2020-10-12 20:12:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:12:52,878 INFO L479 AbstractCegarLoop]: Abstraction has 4978 states and 7633 transitions. [2020-10-12 20:12:52,879 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 20:12:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 4978 states and 7633 transitions. [2020-10-12 20:12:52,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-12 20:12:52,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:52,881 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:12:52,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 20:12:52,881 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:52,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:52,881 INFO L82 PathProgramCache]: Analyzing trace with hash 373146124, now seen corresponding path program 1 times [2020-10-12 20:12:52,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:52,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316303556] [2020-10-12 20:12:52,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:52,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:52,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:52,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:53,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:54,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:54,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-12 20:12:54,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-12 20:12:54,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1535 [2020-10-12 20:12:54,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:54,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:12:54,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:12:54,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-12 20:12:54,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:54,689 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:54,690 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:54,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:54,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:54,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:54,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:54,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:54,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:12:54,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:54,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:54,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:54,726 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 20:12:54,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316303556] [2020-10-12 20:12:54,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:54,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 20:12:54,728 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376177812] [2020-10-12 20:12:54,729 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:12:54,729 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:54,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:12:54,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:12:54,730 INFO L87 Difference]: Start difference. First operand 4978 states and 7633 transitions. Second operand 9 states. [2020-10-12 20:12:54,979 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:12:57,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:12:57,246 INFO L93 Difference]: Finished difference Result 29399 states and 45593 transitions. [2020-10-12 20:12:57,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:12:57,247 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 84 [2020-10-12 20:12:57,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:12:57,348 INFO L225 Difference]: With dead ends: 29399 [2020-10-12 20:12:57,349 INFO L226 Difference]: Without dead ends: 26917 [2020-10-12 20:12:57,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:12:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26917 states. [2020-10-12 20:12:58,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26917 to 9762. [2020-10-12 20:12:58,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9762 states. [2020-10-12 20:12:58,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9762 states to 9762 states and 15009 transitions. [2020-10-12 20:12:58,198 INFO L78 Accepts]: Start accepts. Automaton has 9762 states and 15009 transitions. Word has length 84 [2020-10-12 20:12:58,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:12:58,199 INFO L479 AbstractCegarLoop]: Abstraction has 9762 states and 15009 transitions. [2020-10-12 20:12:58,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:12:58,199 INFO L276 IsEmpty]: Start isEmpty. Operand 9762 states and 15009 transitions. [2020-10-12 20:12:58,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-12 20:12:58,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:12:58,201 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:12:58,201 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 20:12:58,201 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:12:58,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:12:58,202 INFO L82 PathProgramCache]: Analyzing trace with hash 871090148, now seen corresponding path program 1 times [2020-10-12 20:12:58,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:12:58,202 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038062294] [2020-10-12 20:12:58,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:12:58,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:58,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:58,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:58,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:58,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:58,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 20:12:58,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-12 20:12:58,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 438 [2020-10-12 20:12:58,667 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 20:12:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:12:58,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-12 20:12:58,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:58,897 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:12:58,898 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:12:58,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:12:58,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:12:58,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:12:58,909 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:12:58,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:12:58,910 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:12:58,910 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:12:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:12:58,910 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:12:58,911 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:12:58,911 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:12:58,934 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 20:12:58,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038062294] [2020-10-12 20:12:58,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:12:58,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-12 20:12:58,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624848297] [2020-10-12 20:12:58,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 20:12:58,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:12:58,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 20:12:58,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-12 20:12:58,936 INFO L87 Difference]: Start difference. First operand 9762 states and 15009 transitions. Second operand 5 states. [2020-10-12 20:12:59,241 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification that was a NOOP. DAG size: 175 [2020-10-12 20:13:00,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:00,763 INFO L93 Difference]: Finished difference Result 19928 states and 30788 transitions. [2020-10-12 20:13:00,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:13:00,764 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 85 [2020-10-12 20:13:00,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:00,802 INFO L225 Difference]: With dead ends: 19928 [2020-10-12 20:13:00,802 INFO L226 Difference]: Without dead ends: 14806 [2020-10-12 20:13:00,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:13:00,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14806 states. [2020-10-12 20:13:01,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14806 to 14738. [2020-10-12 20:13:01,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14738 states. [2020-10-12 20:13:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14738 states to 14738 states and 22641 transitions. [2020-10-12 20:13:01,834 INFO L78 Accepts]: Start accepts. Automaton has 14738 states and 22641 transitions. Word has length 85 [2020-10-12 20:13:01,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:01,834 INFO L479 AbstractCegarLoop]: Abstraction has 14738 states and 22641 transitions. [2020-10-12 20:13:01,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 20:13:01,835 INFO L276 IsEmpty]: Start isEmpty. Operand 14738 states and 22641 transitions. [2020-10-12 20:13:01,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-12 20:13:01,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:01,836 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:01,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 20:13:01,837 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:01,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:01,837 INFO L82 PathProgramCache]: Analyzing trace with hash 275147387, now seen corresponding path program 1 times [2020-10-12 20:13:01,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:01,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [778758982] [2020-10-12 20:13:01,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:01,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:01,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:01,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:01,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:01,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:03,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:06,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:06,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-12 20:13:06,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:13:06,068 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4205 [2020-10-12 20:13:06,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:06,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:13:06,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-12 20:13:06,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 20:13:06,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:06,378 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:06,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:06,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:06,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:06,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:06,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:06,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:13:06,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:06,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:06,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:06,413 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 20:13:06,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [778758982] [2020-10-12 20:13:06,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:06,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2020-10-12 20:13:06,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844933986] [2020-10-12 20:13:06,415 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:13:06,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:06,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:13:06,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:13:06,416 INFO L87 Difference]: Start difference. First operand 14738 states and 22641 transitions. Second operand 9 states. [2020-10-12 20:13:06,645 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:13:09,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:09,487 INFO L93 Difference]: Finished difference Result 55383 states and 85385 transitions. [2020-10-12 20:13:09,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:13:09,488 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 86 [2020-10-12 20:13:09,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:09,617 INFO L225 Difference]: With dead ends: 55383 [2020-10-12 20:13:09,617 INFO L226 Difference]: Without dead ends: 50565 [2020-10-12 20:13:09,637 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:13:09,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50565 states. [2020-10-12 20:13:10,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50565 to 17202. [2020-10-12 20:13:10,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17202 states. [2020-10-12 20:13:11,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17202 states to 17202 states and 26417 transitions. [2020-10-12 20:13:11,018 INFO L78 Accepts]: Start accepts. Automaton has 17202 states and 26417 transitions. Word has length 86 [2020-10-12 20:13:11,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:11,018 INFO L479 AbstractCegarLoop]: Abstraction has 17202 states and 26417 transitions. [2020-10-12 20:13:11,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:13:11,018 INFO L276 IsEmpty]: Start isEmpty. Operand 17202 states and 26417 transitions. [2020-10-12 20:13:11,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-12 20:13:11,020 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:11,020 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 20:13:11,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 20:13:11,021 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:11,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:11,021 INFO L82 PathProgramCache]: Analyzing trace with hash -78483338, now seen corresponding path program 1 times [2020-10-12 20:13:11,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:11,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1275877909] [2020-10-12 20:13:11,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:11,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:11,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:11,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:11,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:11,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:11,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:11,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:11,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:16,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:16,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-12 20:13:16,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:13:16,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:13:16,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:16,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 20:13:16,043 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-12 20:13:16,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-12 20:13:16,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:16,330 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:16,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:16,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:16,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:16,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:16,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:16,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-12 20:13:16,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:16,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:16,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:16,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 20:13:16,383 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 20:13:16,383 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1275877909] [2020-10-12 20:13:16,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 20:13:16,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-12 20:13:16,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25372333] [2020-10-12 20:13:16,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 20:13:16,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:16,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 20:13:16,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-12 20:13:16,386 INFO L87 Difference]: Start difference. First operand 17202 states and 26417 transitions. Second operand 8 states. [2020-10-12 20:13:19,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:19,909 INFO L93 Difference]: Finished difference Result 35808 states and 54518 transitions. [2020-10-12 20:13:19,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 20:13:19,909 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-12 20:13:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:19,970 INFO L225 Difference]: With dead ends: 35808 [2020-10-12 20:13:19,970 INFO L226 Difference]: Without dead ends: 30990 [2020-10-12 20:13:19,987 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-12 20:13:20,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30990 states. [2020-10-12 20:13:21,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30990 to 17217. [2020-10-12 20:13:21,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17217 states. [2020-10-12 20:13:21,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17217 states to 17217 states and 26441 transitions. [2020-10-12 20:13:21,097 INFO L78 Accepts]: Start accepts. Automaton has 17217 states and 26441 transitions. Word has length 89 [2020-10-12 20:13:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:21,097 INFO L479 AbstractCegarLoop]: Abstraction has 17217 states and 26441 transitions. [2020-10-12 20:13:21,097 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 20:13:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 17217 states and 26441 transitions. [2020-10-12 20:13:21,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 20:13:21,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:21,107 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:13:21,107 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 20:13:21,107 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:21,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:21,108 INFO L82 PathProgramCache]: Analyzing trace with hash 650923090, now seen corresponding path program 1 times [2020-10-12 20:13:21,108 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:21,108 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204393073] [2020-10-12 20:13:21,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:21,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:21,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:21,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:21,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:21,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:21,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:21,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:23,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-12 20:13:26,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:13:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:13:26,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 20:13:26,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:26,414 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:26,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:26,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:26,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:26,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:26,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:26,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:13:26,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:26,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:26,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:13:26,466 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-12 20:13:26,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204393073] [2020-10-12 20:13:26,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:13:26,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:13:26,471 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [545563845] [2020-10-12 20:13:26,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:13:26,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:26,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:13:26,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:13:26,472 INFO L87 Difference]: Start difference. First operand 17217 states and 26441 transitions. Second operand 9 states. [2020-10-12 20:13:26,710 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:13:30,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:30,960 INFO L93 Difference]: Finished difference Result 59894 states and 92256 transitions. [2020-10-12 20:13:30,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:13:30,961 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2020-10-12 20:13:30,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:31,063 INFO L225 Difference]: With dead ends: 59894 [2020-10-12 20:13:31,063 INFO L226 Difference]: Without dead ends: 52596 [2020-10-12 20:13:31,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:13:31,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52596 states. [2020-10-12 20:13:32,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52596 to 20913. [2020-10-12 20:13:32,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20913 states. [2020-10-12 20:13:32,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20913 states to 20913 states and 32105 transitions. [2020-10-12 20:13:32,626 INFO L78 Accepts]: Start accepts. Automaton has 20913 states and 32105 transitions. Word has length 113 [2020-10-12 20:13:32,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:32,626 INFO L479 AbstractCegarLoop]: Abstraction has 20913 states and 32105 transitions. [2020-10-12 20:13:32,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:13:32,626 INFO L276 IsEmpty]: Start isEmpty. Operand 20913 states and 32105 transitions. [2020-10-12 20:13:32,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 20:13:32,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:32,640 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:13:32,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 20:13:32,640 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:32,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:32,640 INFO L82 PathProgramCache]: Analyzing trace with hash -243261561, now seen corresponding path program 1 times [2020-10-12 20:13:32,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:32,642 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912473826] [2020-10-12 20:13:32,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:32,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:32,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:32,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:32,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:33,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:34,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:37,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:37,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 20:13:37,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:13:37,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-12 20:13:37,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:37,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:13:37,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:13:37,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 20:13:37,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:37,935 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:37,936 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:37,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:37,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:37,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:37,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:37,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-12 20:13:37,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:37,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:37,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:37,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:37,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:38,022 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-12 20:13:38,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912473826] [2020-10-12 20:13:38,023 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:13:38,023 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:13:38,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958161863] [2020-10-12 20:13:38,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:13:38,024 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:38,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:13:38,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:13:38,025 INFO L87 Difference]: Start difference. First operand 20913 states and 32105 transitions. Second operand 9 states. [2020-10-12 20:13:38,272 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:13:42,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:42,588 INFO L93 Difference]: Finished difference Result 64142 states and 98736 transitions. [2020-10-12 20:13:42,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:13:42,588 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2020-10-12 20:13:42,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:42,684 INFO L225 Difference]: With dead ends: 64142 [2020-10-12 20:13:42,684 INFO L226 Difference]: Without dead ends: 56844 [2020-10-12 20:13:42,709 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:13:42,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56844 states. [2020-10-12 20:13:44,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56844 to 24609. [2020-10-12 20:13:44,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24609 states. [2020-10-12 20:13:44,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24609 states to 24609 states and 37769 transitions. [2020-10-12 20:13:44,689 INFO L78 Accepts]: Start accepts. Automaton has 24609 states and 37769 transitions. Word has length 113 [2020-10-12 20:13:44,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:44,690 INFO L479 AbstractCegarLoop]: Abstraction has 24609 states and 37769 transitions. [2020-10-12 20:13:44,690 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:13:44,690 INFO L276 IsEmpty]: Start isEmpty. Operand 24609 states and 37769 transitions. [2020-10-12 20:13:44,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 20:13:44,699 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:44,700 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:13:44,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 20:13:44,700 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:44,700 INFO L82 PathProgramCache]: Analyzing trace with hash -1721712410, now seen corresponding path program 1 times [2020-10-12 20:13:44,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:44,701 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1126727091] [2020-10-12 20:13:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:44,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:44,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:44,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:44,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:44,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:45,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:45,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:49,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:49,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 20:13:49,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:13:49,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-12 20:13:49,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:13:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:13:49,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 20:13:49,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:49,962 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:13:49,963 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:13:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:49,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:49,974 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:13:49,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:13:49,975 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:13:49,975 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-12 20:13:49,975 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:13:49,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:13:49,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:13:49,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:13:49,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:13:50,004 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-12 20:13:50,005 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1126727091] [2020-10-12 20:13:50,005 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:13:50,005 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:13:50,005 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775137773] [2020-10-12 20:13:50,005 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:13:50,006 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:13:50,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:13:50,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:13:50,006 INFO L87 Difference]: Start difference. First operand 24609 states and 37769 transitions. Second operand 9 states. [2020-10-12 20:13:50,246 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:13:55,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:13:55,297 INFO L93 Difference]: Finished difference Result 68150 states and 104844 transitions. [2020-10-12 20:13:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:13:55,297 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2020-10-12 20:13:55,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:13:55,382 INFO L225 Difference]: With dead ends: 68150 [2020-10-12 20:13:55,382 INFO L226 Difference]: Without dead ends: 60852 [2020-10-12 20:13:55,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:13:55,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60852 states. [2020-10-12 20:13:57,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60852 to 28305. [2020-10-12 20:13:57,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28305 states. [2020-10-12 20:13:57,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28305 states to 28305 states and 43433 transitions. [2020-10-12 20:13:57,547 INFO L78 Accepts]: Start accepts. Automaton has 28305 states and 43433 transitions. Word has length 113 [2020-10-12 20:13:57,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:13:57,547 INFO L479 AbstractCegarLoop]: Abstraction has 28305 states and 43433 transitions. [2020-10-12 20:13:57,547 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:13:57,547 INFO L276 IsEmpty]: Start isEmpty. Operand 28305 states and 43433 transitions. [2020-10-12 20:13:57,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-12 20:13:57,557 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:13:57,557 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:13:57,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 20:13:57,557 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:13:57,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:13:57,557 INFO L82 PathProgramCache]: Analyzing trace with hash 2086419055, now seen corresponding path program 1 times [2020-10-12 20:13:57,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:13:57,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1893496940] [2020-10-12 20:13:57,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:13:57,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:13:57,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:57,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:57,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:58,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:58,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:58,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:13:58,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:02,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:02,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 20:14:02,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-12 20:14:02,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-12 20:14:02,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:02,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:14:02,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-12 20:14:02,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 101 [2020-10-12 20:14:02,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:02,839 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:02,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:02,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:02,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:02,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:02,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:02,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:02,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:14:02,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:02,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:02,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-12 20:14:02,873 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1893496940] [2020-10-12 20:14:02,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:14:02,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:14:02,873 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437354599] [2020-10-12 20:14:02,873 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:14:02,873 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:14:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:14:02,874 INFO L87 Difference]: Start difference. First operand 28305 states and 43433 transitions. Second operand 9 states. [2020-10-12 20:14:03,118 WARN L193 SmtUtils]: Spent 196.00 ms on a formula simplification that was a NOOP. DAG size: 179 [2020-10-12 20:14:08,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:08,303 INFO L93 Difference]: Finished difference Result 71767 states and 110356 transitions. [2020-10-12 20:14:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 20:14:08,303 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 113 [2020-10-12 20:14:08,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:08,374 INFO L225 Difference]: With dead ends: 71767 [2020-10-12 20:14:08,374 INFO L226 Difference]: Without dead ends: 64469 [2020-10-12 20:14:08,393 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-12 20:14:08,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64469 states. [2020-10-12 20:14:11,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64469 to 32001. [2020-10-12 20:14:11,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32001 states. [2020-10-12 20:14:11,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32001 states to 32001 states and 49097 transitions. [2020-10-12 20:14:11,806 INFO L78 Accepts]: Start accepts. Automaton has 32001 states and 49097 transitions. Word has length 113 [2020-10-12 20:14:11,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:11,807 INFO L479 AbstractCegarLoop]: Abstraction has 32001 states and 49097 transitions. [2020-10-12 20:14:11,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:14:11,807 INFO L276 IsEmpty]: Start isEmpty. Operand 32001 states and 49097 transitions. [2020-10-12 20:14:11,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 20:14:11,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:11,815 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:11,816 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 20:14:11,816 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:11,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:11,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1382112611, now seen corresponding path program 1 times [2020-10-12 20:14:11,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:11,817 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [425899968] [2020-10-12 20:14:11,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:11,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:11,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:11,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:12,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:13,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:13,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 20:14:13,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 20:14:13,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1505 [2020-10-12 20:14:13,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:13,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 20:14:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-12 20:14:13,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-12 20:14:13,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 20:14:13,622 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:13,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:13,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:13,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:13,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:13,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:13,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:14:13,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:13,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:13,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:13,661 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:13,662 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [425899968] [2020-10-12 20:14:13,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:14:13,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 20:14:13,662 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351451822] [2020-10-12 20:14:13,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 20:14:13,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:13,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 20:14:13,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-12 20:14:13,663 INFO L87 Difference]: Start difference. First operand 32001 states and 49097 transitions. Second operand 6 states. [2020-10-12 20:14:13,867 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification that was a NOOP. DAG size: 170 [2020-10-12 20:14:17,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:17,885 INFO L93 Difference]: Finished difference Result 54969 states and 84717 transitions. [2020-10-12 20:14:17,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 20:14:17,885 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2020-10-12 20:14:17,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:17,933 INFO L225 Difference]: With dead ends: 54969 [2020-10-12 20:14:17,933 INFO L226 Difference]: Without dead ends: 43367 [2020-10-12 20:14:17,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=16, Invalid=26, Unknown=0, NotChecked=0, Total=42 [2020-10-12 20:14:17,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43367 states. [2020-10-12 20:14:21,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43367 to 43217. [2020-10-12 20:14:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43217 states. [2020-10-12 20:14:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43217 states to 43217 states and 66249 transitions. [2020-10-12 20:14:21,356 INFO L78 Accepts]: Start accepts. Automaton has 43217 states and 66249 transitions. Word has length 116 [2020-10-12 20:14:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:21,356 INFO L479 AbstractCegarLoop]: Abstraction has 43217 states and 66249 transitions. [2020-10-12 20:14:21,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 20:14:21,356 INFO L276 IsEmpty]: Start isEmpty. Operand 43217 states and 66249 transitions. [2020-10-12 20:14:21,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 20:14:21,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:21,365 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:21,365 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 20:14:21,365 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:21,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:21,365 INFO L82 PathProgramCache]: Analyzing trace with hash -263568967, now seen corresponding path program 1 times [2020-10-12 20:14:21,366 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:21,366 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626383518] [2020-10-12 20:14:21,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:21,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:21,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:21,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:26,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:26,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 20:14:26,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:14:26,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:14:26,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:14:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:14:26,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 20:14:26,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:26,626 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:26,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:26,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:26,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:26,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:26,636 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:26,636 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:26,636 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:14:26,636 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:26,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:26,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:26,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:26,637 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:26,651 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:26,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626383518] [2020-10-12 20:14:26,651 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:14:26,651 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:14:26,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032302048] [2020-10-12 20:14:26,652 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:14:26,652 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:26,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:14:26,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:14:26,653 INFO L87 Difference]: Start difference. First operand 43217 states and 66249 transitions. Second operand 9 states. [2020-10-12 20:14:33,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:33,220 INFO L93 Difference]: Finished difference Result 73781 states and 112889 transitions. [2020-10-12 20:14:33,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:14:33,221 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 116 [2020-10-12 20:14:33,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:33,297 INFO L225 Difference]: With dead ends: 73781 [2020-10-12 20:14:33,298 INFO L226 Difference]: Without dead ends: 64003 [2020-10-12 20:14:33,327 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:14:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64003 states. [2020-10-12 20:14:36,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64003 to 43504. [2020-10-12 20:14:36,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43504 states. [2020-10-12 20:14:36,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43504 states to 43504 states and 66688 transitions. [2020-10-12 20:14:36,834 INFO L78 Accepts]: Start accepts. Automaton has 43504 states and 66688 transitions. Word has length 116 [2020-10-12 20:14:36,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:36,835 INFO L479 AbstractCegarLoop]: Abstraction has 43504 states and 66688 transitions. [2020-10-12 20:14:36,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:14:36,835 INFO L276 IsEmpty]: Start isEmpty. Operand 43504 states and 66688 transitions. [2020-10-12 20:14:36,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 20:14:36,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:36,843 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:36,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 20:14:36,844 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:36,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:36,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1157753618, now seen corresponding path program 1 times [2020-10-12 20:14:36,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:36,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986411347] [2020-10-12 20:14:36,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:37,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:37,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:41,865 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:41,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 20:14:41,866 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:14:41,866 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 20:14:41,866 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:14:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-12 20:14:41,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 20:14:41,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:42,089 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:42,090 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:42,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:42,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:42,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:42,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:42,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:42,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:14:42,100 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:42,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:42,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:42,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:42,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:42,114 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:42,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986411347] [2020-10-12 20:14:42,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:14:42,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:14:42,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764299468] [2020-10-12 20:14:42,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:14:42,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:42,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:14:42,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:14:42,116 INFO L87 Difference]: Start difference. First operand 43504 states and 66688 transitions. Second operand 9 states. [2020-10-12 20:14:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:14:49,084 INFO L93 Difference]: Finished difference Result 74072 states and 113335 transitions. [2020-10-12 20:14:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:14:49,085 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 116 [2020-10-12 20:14:49,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:14:49,148 INFO L225 Difference]: With dead ends: 74072 [2020-10-12 20:14:49,148 INFO L226 Difference]: Without dead ends: 64294 [2020-10-12 20:14:49,162 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:14:49,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64294 states. [2020-10-12 20:14:52,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64294 to 43866. [2020-10-12 20:14:52,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43866 states. [2020-10-12 20:14:52,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43866 states to 43866 states and 67247 transitions. [2020-10-12 20:14:52,892 INFO L78 Accepts]: Start accepts. Automaton has 43866 states and 67247 transitions. Word has length 116 [2020-10-12 20:14:52,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:14:52,892 INFO L479 AbstractCegarLoop]: Abstraction has 43866 states and 67247 transitions. [2020-10-12 20:14:52,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:14:52,892 INFO L276 IsEmpty]: Start isEmpty. Operand 43866 states and 67247 transitions. [2020-10-12 20:14:52,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 20:14:52,901 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:14:52,901 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:14:52,901 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 20:14:52,901 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:14:52,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:14:52,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1658762829, now seen corresponding path program 1 times [2020-10-12 20:14:52,902 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:14:52,902 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [873514378] [2020-10-12 20:14:52,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:14:52,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:52,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:52,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:52,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:53,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:53,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:53,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:53,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:57,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:57,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:57,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:57,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 20:14:57,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:14:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 20:14:57,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:14:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-12 20:14:57,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-12 20:14:57,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:58,146 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:14:58,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:14:58,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:14:58,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:14:58,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:14:58,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:14:58,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:14:58,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:14:58,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:14:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:14:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:14:58,157 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:14:58,157 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:14:58,172 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:14:58,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [873514378] [2020-10-12 20:14:58,172 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:14:58,173 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:14:58,173 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052794306] [2020-10-12 20:14:58,173 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:14:58,173 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:14:58,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:14:58,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:14:58,174 INFO L87 Difference]: Start difference. First operand 43866 states and 67247 transitions. Second operand 9 states. [2020-10-12 20:15:05,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:05,506 INFO L93 Difference]: Finished difference Result 74948 states and 114713 transitions. [2020-10-12 20:15:05,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:05,506 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 116 [2020-10-12 20:15:05,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:05,571 INFO L225 Difference]: With dead ends: 74948 [2020-10-12 20:15:05,571 INFO L226 Difference]: Without dead ends: 65170 [2020-10-12 20:15:05,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:15:05,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65170 states. [2020-10-12 20:15:09,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65170 to 44792. [2020-10-12 20:15:09,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44792 states. [2020-10-12 20:15:09,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44792 states to 44792 states and 68701 transitions. [2020-10-12 20:15:09,504 INFO L78 Accepts]: Start accepts. Automaton has 44792 states and 68701 transitions. Word has length 116 [2020-10-12 20:15:09,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:09,504 INFO L479 AbstractCegarLoop]: Abstraction has 44792 states and 68701 transitions. [2020-10-12 20:15:09,504 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:15:09,504 INFO L276 IsEmpty]: Start isEmpty. Operand 44792 states and 68701 transitions. [2020-10-12 20:15:09,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 20:15:09,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:09,514 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:15:09,514 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 20:15:09,514 INFO L427 AbstractCegarLoop]: === Iteration 20 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:09,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:09,514 INFO L82 PathProgramCache]: Analyzing trace with hash 1171926998, now seen corresponding path program 1 times [2020-10-12 20:15:09,514 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:09,515 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307803185] [2020-10-12 20:15:09,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:09,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:09,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:09,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:09,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:09,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:10,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:10,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:10,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:10,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:14,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:14,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 20:15:14,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:15:14,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-12 20:15:14,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:15:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-10-12 20:15:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 20:15:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:14,763 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:14,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:14,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:14,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:14,772 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:14,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:14,773 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:14,773 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:14,773 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:14,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:14,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:14,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:14,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:14,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307803185] [2020-10-12 20:15:14,788 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:15:14,789 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:15:14,789 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138355912] [2020-10-12 20:15:14,789 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:15:14,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:14,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:15:14,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:15:14,790 INFO L87 Difference]: Start difference. First operand 44792 states and 68701 transitions. Second operand 9 states. [2020-10-12 20:15:22,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:22,497 INFO L93 Difference]: Finished difference Result 77104 states and 118141 transitions. [2020-10-12 20:15:22,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 20:15:22,498 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 116 [2020-10-12 20:15:22,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:22,569 INFO L225 Difference]: With dead ends: 77104 [2020-10-12 20:15:22,569 INFO L226 Difference]: Without dead ends: 67326 [2020-10-12 20:15:22,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-12 20:15:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67326 states. [2020-10-12 20:15:28,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67326 to 47082. [2020-10-12 20:15:28,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47082 states. [2020-10-12 20:15:28,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47082 states to 47082 states and 72337 transitions. [2020-10-12 20:15:28,185 INFO L78 Accepts]: Start accepts. Automaton has 47082 states and 72337 transitions. Word has length 116 [2020-10-12 20:15:28,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:15:28,185 INFO L479 AbstractCegarLoop]: Abstraction has 47082 states and 72337 transitions. [2020-10-12 20:15:28,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:15:28,185 INFO L276 IsEmpty]: Start isEmpty. Operand 47082 states and 72337 transitions. [2020-10-12 20:15:28,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 20:15:28,199 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:15:28,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:15:28,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 20:15:28,199 INFO L427 AbstractCegarLoop]: === Iteration 21 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:15:28,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:15:28,200 INFO L82 PathProgramCache]: Analyzing trace with hash 1035511545, now seen corresponding path program 2 times [2020-10-12 20:15:28,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:15:28,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424444440] [2020-10-12 20:15:28,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:15:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:28,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:28,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:29,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:33,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:33,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-12 20:15:33,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-12 20:15:33,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-12 20:15:33,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:33,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 20:15:33,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-12 20:15:33,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-12 20:15:33,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:33,456 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification that was a NOOP. DAG size: 166 [2020-10-12 20:15:33,457 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 20:15:33,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:15:33,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:15:33,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 20:15:33,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 20:15:33,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 20:15:33,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-12 20:15:33,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 20:15:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 20:15:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 20:15:33,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 20:15:33,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 20:15:33,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 20:15:33,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424444440] [2020-10-12 20:15:33,484 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 20:15:33,485 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 20:15:33,485 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552097149] [2020-10-12 20:15:33,485 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 20:15:33,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 20:15:33,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 20:15:33,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-12 20:15:33,486 INFO L87 Difference]: Start difference. First operand 47082 states and 72337 transitions. Second operand 9 states. [2020-10-12 20:15:56,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 20:15:56,405 INFO L93 Difference]: Finished difference Result 241442 states and 370026 transitions. [2020-10-12 20:15:56,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 20:15:56,405 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 116 [2020-10-12 20:15:56,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 20:15:56,686 INFO L225 Difference]: With dead ends: 241442 [2020-10-12 20:15:56,686 INFO L226 Difference]: Without dead ends: 231664 [2020-10-12 20:15:56,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2020-10-12 20:15:56,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231664 states. [2020-10-12 20:16:06,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231664 to 76945. [2020-10-12 20:16:06,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76945 states. [2020-10-12 20:16:06,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76945 states to 76945 states and 118980 transitions. [2020-10-12 20:16:06,932 INFO L78 Accepts]: Start accepts. Automaton has 76945 states and 118980 transitions. Word has length 116 [2020-10-12 20:16:06,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 20:16:06,932 INFO L479 AbstractCegarLoop]: Abstraction has 76945 states and 118980 transitions. [2020-10-12 20:16:06,932 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 20:16:06,932 INFO L276 IsEmpty]: Start isEmpty. Operand 76945 states and 118980 transitions. [2020-10-12 20:16:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-12 20:16:06,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 20:16:06,947 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 20:16:06,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 20:16:06,947 INFO L427 AbstractCegarLoop]: === Iteration 22 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 20:16:06,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 20:16:06,947 INFO L82 PathProgramCache]: Analyzing trace with hash 141326894, now seen corresponding path program 2 times [2020-10-12 20:16:06,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 20:16:06,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344766108] [2020-10-12 20:16:06,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 20:16:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 20:16:06,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:06,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:07,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:07,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:07,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 20:16:07,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking...