/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=NARROWEST --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.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 14:32:35,378 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 14:32:35,381 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 14:32:35,410 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 14:32:35,410 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 14:32:35,411 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 14:32:35,412 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 14:32:35,414 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 14:32:35,419 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 14:32:35,420 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 14:32:35,421 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 14:32:35,422 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 14:32:35,422 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 14:32:35,423 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 14:32:35,424 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 14:32:35,425 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 14:32:35,426 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 14:32:35,427 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 14:32:35,429 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 14:32:35,431 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 14:32:35,433 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 14:32:35,434 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 14:32:35,436 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 14:32:35,436 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 14:32:35,439 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 14:32:35,440 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 14:32:35,440 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 14:32:35,441 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 14:32:35,441 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 14:32:35,442 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 14:32:35,442 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 14:32:35,443 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 14:32:35,444 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 14:32:35,445 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 14:32:35,446 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 14:32:35,446 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 14:32:35,447 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 14:32:35,447 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 14:32:35,447 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 14:32:35,448 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 14:32:35,449 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 14:32:35,450 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 [2020-10-13 14:32:35,472 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 14:32:35,472 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 14:32:35,473 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 14:32:35,474 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 14:32:35,474 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 14:32:35,474 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 14:32:35,474 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 14:32:35,475 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 14:32:35,475 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 14:32:35,475 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 14:32:35,475 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 14:32:35,475 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 14:32:35,475 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 14:32:35,476 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 14:32:35,476 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 14:32:35,476 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 14:32:35,476 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 14:32:35,476 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 14:32:35,477 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 14:32:35,477 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 14:32:35,477 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 14:32:35,477 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 14:32:35,477 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 14:32:35,478 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 14:32:35,478 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 14:32:35,478 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 14:32:35,478 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 14:32:35,478 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 14:32:35,479 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 14:32:35,479 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 14:32:35,801 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 14:32:35,813 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 14:32:35,816 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 14:32:35,818 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 14:32:35,818 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 14:32:35,819 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:32:35,878 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dde20118/90d473bafec043d38fb477123376fddd/FLAG0b377137f [2020-10-13 14:32:36,411 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 14:32:36,412 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/seq-mthreaded-reduced/pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:32:36,422 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dde20118/90d473bafec043d38fb477123376fddd/FLAG0b377137f [2020-10-13 14:32:36,743 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2dde20118/90d473bafec043d38fb477123376fddd [2020-10-13 14:32:36,751 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 14:32:36,753 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 14:32:36,754 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 14:32:36,754 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 14:32:36,761 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 14:32:36,763 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:32:36" (1/1) ... [2020-10-13 14:32:36,766 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f71ec06 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:36, skipping insertion in model container [2020-10-13 14:32:36,767 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 02:32:36" (1/1) ... [2020-10-13 14:32:36,776 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 14:32:36,839 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 14:32:37,136 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:32:37,255 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 14:32:37,350 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 14:32:37,371 INFO L208 MainTranslator]: Completed translation [2020-10-13 14:32:37,371 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37 WrapperNode [2020-10-13 14:32:37,371 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 14:32:37,372 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 14:32:37,372 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 14:32:37,372 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 14:32:37,384 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (1/1) ... [2020-10-13 14:32:37,385 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (1/1) ... [2020-10-13 14:32:37,397 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (1/1) ... [2020-10-13 14:32:37,398 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (1/1) ... [2020-10-13 14:32:37,426 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (1/1) ... [2020-10-13 14:32:37,437 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (1/1) ... [2020-10-13 14:32:37,441 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (1/1) ... [2020-10-13 14:32:37,447 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 14:32:37,448 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 14:32:37,448 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 14:32:37,448 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 14:32:37,449 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (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 [2020-10-13 14:32:37,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 14:32:37,511 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 14:32:37,511 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 14:32:37,511 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 14:32:37,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 14:32:37,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_bool [2020-10-13 14:32:37,511 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2020-10-13 14:32:37,512 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2020-10-13 14:32:37,512 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 14:32:37,512 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 14:32:37,512 INFO L130 BoogieDeclarations]: Found specification of procedure read [2020-10-13 14:32:37,512 INFO L130 BoogieDeclarations]: Found specification of procedure write [2020-10-13 14:32:37,512 INFO L130 BoogieDeclarations]: Found specification of procedure node1 [2020-10-13 14:32:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure node2 [2020-10-13 14:32:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure node3 [2020-10-13 14:32:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-10-13 14:32:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure check [2020-10-13 14:32:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 14:32:37,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 14:32:37,514 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 14:32:38,403 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 14:32:38,403 INFO L295 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-13 14:32:38,410 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:32:38 BoogieIcfgContainer [2020-10-13 14:32:38,410 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 14:32:38,411 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 14:32:38,411 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 14:32:38,415 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 14:32:38,415 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 02:32:36" (1/3) ... [2020-10-13 14:32:38,416 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182bb3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:32:38, skipping insertion in model container [2020-10-13 14:32:38,416 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 02:32:37" (2/3) ... [2020-10-13 14:32:38,417 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@182bb3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 02:32:38, skipping insertion in model container [2020-10-13 14:32:38,417 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 02:32:38" (3/3) ... [2020-10-13 14:32:38,419 INFO L109 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.3.1.ufo.BOUNDED-6.pals.c.v+nlh-reducer.c [2020-10-13 14:32:38,430 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 14:32:38,438 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 14:32:38,453 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 14:32:38,478 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 14:32:38,479 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 14:32:38,479 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 14:32:38,479 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 14:32:38,479 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 14:32:38,480 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 14:32:38,480 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 14:32:38,480 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 14:32:38,503 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states. [2020-10-13 14:32:38,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 14:32:38,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:38,514 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] [2020-10-13 14:32:38,514 INFO L427 AbstractCegarLoop]: === Iteration 1 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:38,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:38,520 INFO L82 PathProgramCache]: Analyzing trace with hash -2097319933, now seen corresponding path program 1 times [2020-10-13 14:32:38,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:38,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270586754] [2020-10-13 14:32:38,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:38,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:39,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:39,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:40,533 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:40,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 14:32:40,534 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 14:32:40,534 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1703 [2020-10-13 14:32:40,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:40,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:32:40,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-13 14:32:40,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 14:32:40,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 14:32:40,777 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:32:40,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:40,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:40,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:40,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:40,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:40,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:40,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:32:40,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:40,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:40,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:40,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:40,810 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:32:40,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270586754] [2020-10-13 14:32:40,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:40,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:32:40,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796873219] [2020-10-13 14:32:40,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:32:40,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:40,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:32:40,834 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:32:40,836 INFO L87 Difference]: Start difference. First operand 167 states. Second operand 4 states. [2020-10-13 14:32:41,010 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 115 [2020-10-13 14:32:41,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:41,779 INFO L93 Difference]: Finished difference Result 317 states and 511 transitions. [2020-10-13 14:32:41,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:32:41,781 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 54 [2020-10-13 14:32:41,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:41,797 INFO L225 Difference]: With dead ends: 317 [2020-10-13 14:32:41,797 INFO L226 Difference]: Without dead ends: 241 [2020-10-13 14:32:41,801 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 [2020-10-13 14:32:41,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-13 14:32:41,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2020-10-13 14:32:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-13 14:32:41,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 353 transitions. [2020-10-13 14:32:41,888 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 353 transitions. Word has length 54 [2020-10-13 14:32:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:41,890 INFO L479 AbstractCegarLoop]: Abstraction has 239 states and 353 transitions. [2020-10-13 14:32:41,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:32:41,891 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 353 transitions. [2020-10-13 14:32:41,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:32:41,894 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:41,894 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] [2020-10-13 14:32:41,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 14:32:41,895 INFO L427 AbstractCegarLoop]: === Iteration 2 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:41,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:41,895 INFO L82 PathProgramCache]: Analyzing trace with hash -926705827, now seen corresponding path program 1 times [2020-10-13 14:32:41,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:41,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [372121284] [2020-10-13 14:32:41,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:41,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:41,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:42,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:42,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:42,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:46,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:46,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:32:46,941 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:32:46,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:32:46,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:32:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 36 [2020-10-13 14:32:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 14:32:46,947 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:32:47,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:47,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:47,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:47,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:47,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:47,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:47,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-13 14:32:47,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:47,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:47,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:47,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:47,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:32:47,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:32:47,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [372121284] [2020-10-13 14:32:47,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:47,150 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:32:47,150 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726145888] [2020-10-13 14:32:47,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:32:47,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:47,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:32:47,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:32:47,153 INFO L87 Difference]: Start difference. First operand 239 states and 353 transitions. Second operand 4 states. [2020-10-13 14:32:47,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:47,792 INFO L93 Difference]: Finished difference Result 575 states and 871 transitions. [2020-10-13 14:32:47,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:32:47,793 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:32:47,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:47,797 INFO L225 Difference]: With dead ends: 575 [2020-10-13 14:32:47,797 INFO L226 Difference]: Without dead ends: 408 [2020-10-13 14:32:47,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:32:47,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2020-10-13 14:32:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 406. [2020-10-13 14:32:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 406 states. [2020-10-13 14:32:47,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 603 transitions. [2020-10-13 14:32:47,862 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 603 transitions. Word has length 57 [2020-10-13 14:32:47,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:47,862 INFO L479 AbstractCegarLoop]: Abstraction has 406 states and 603 transitions. [2020-10-13 14:32:47,863 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:32:47,863 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 603 transitions. [2020-10-13 14:32:47,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:32:47,868 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:47,870 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] [2020-10-13 14:32:47,871 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 14:32:47,871 INFO L427 AbstractCegarLoop]: === Iteration 3 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:47,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:47,872 INFO L82 PathProgramCache]: Analyzing trace with hash -559847393, now seen corresponding path program 1 times [2020-10-13 14:32:47,872 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:47,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1252610916] [2020-10-13 14:32:47,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:47,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:47,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:48,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:48,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:48,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:50,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:50,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:32:50,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:32:50,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2790 [2020-10-13 14:32:50,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:50,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:32:50,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-10-13 14:32:50,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 14:32:50,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:50,847 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:50,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:50,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:50,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:50,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:50,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:50,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:32:50,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:50,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:50,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:32:50,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:32:50,872 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1252610916] [2020-10-13 14:32:50,873 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:50,873 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:32:50,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057731756] [2020-10-13 14:32:50,874 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:32:50,874 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:50,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:32:50,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:32:50,875 INFO L87 Difference]: Start difference. First operand 406 states and 603 transitions. Second operand 4 states. [2020-10-13 14:32:51,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:51,589 INFO L93 Difference]: Finished difference Result 982 states and 1479 transitions. [2020-10-13 14:32:51,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:32:51,591 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:32:51,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:51,600 INFO L225 Difference]: With dead ends: 982 [2020-10-13 14:32:51,600 INFO L226 Difference]: Without dead ends: 696 [2020-10-13 14:32:51,604 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:32:51,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2020-10-13 14:32:51,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 694. [2020-10-13 14:32:51,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 694 states. [2020-10-13 14:32:51,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 694 states to 694 states and 1025 transitions. [2020-10-13 14:32:51,647 INFO L78 Accepts]: Start accepts. Automaton has 694 states and 1025 transitions. Word has length 57 [2020-10-13 14:32:51,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:51,649 INFO L479 AbstractCegarLoop]: Abstraction has 694 states and 1025 transitions. [2020-10-13 14:32:51,649 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:32:51,649 INFO L276 IsEmpty]: Start isEmpty. Operand 694 states and 1025 transitions. [2020-10-13 14:32:51,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 14:32:51,656 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:51,657 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] [2020-10-13 14:32:51,657 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 14:32:51,657 INFO L427 AbstractCegarLoop]: === Iteration 4 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:51,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:51,657 INFO L82 PathProgramCache]: Analyzing trace with hash 980837471, now seen corresponding path program 1 times [2020-10-13 14:32:51,658 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:51,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1594229096] [2020-10-13 14:32:51,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:51,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:51,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:51,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:51,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:51,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:52,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:54,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:54,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-13 14:32:54,302 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:32:54,302 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2610 [2020-10-13 14:32:54,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:54,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:32:54,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 32 [2020-10-13 14:32:54,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 14:32:54,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:32:54,454 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:32:54,455 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:54,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:54,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:54,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:54,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:54,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:54,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-13 14:32:54,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:54,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:54,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:54,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:54,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 14:32:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:32:54,493 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1594229096] [2020-10-13 14:32:54,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:54,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 14:32:54,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813105219] [2020-10-13 14:32:54,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 14:32:54,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:54,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 14:32:54,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 14:32:54,496 INFO L87 Difference]: Start difference. First operand 694 states and 1025 transitions. Second operand 4 states. [2020-10-13 14:32:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:55,348 INFO L93 Difference]: Finished difference Result 1772 states and 2629 transitions. [2020-10-13 14:32:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 14:32:55,349 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-13 14:32:55,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:55,357 INFO L225 Difference]: With dead ends: 1772 [2020-10-13 14:32:55,357 INFO L226 Difference]: Without dead ends: 1174 [2020-10-13 14:32:55,360 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-13 14:32:55,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2020-10-13 14:32:55,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 1172. [2020-10-13 14:32:55,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2020-10-13 14:32:55,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1695 transitions. [2020-10-13 14:32:55,447 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1695 transitions. Word has length 57 [2020-10-13 14:32:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:55,449 INFO L479 AbstractCegarLoop]: Abstraction has 1172 states and 1695 transitions. [2020-10-13 14:32:55,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 14:32:55,450 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1695 transitions. [2020-10-13 14:32:55,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:32:55,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:55,454 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] [2020-10-13 14:32:55,454 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 14:32:55,455 INFO L427 AbstractCegarLoop]: === Iteration 5 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:55,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:55,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1147607800, now seen corresponding path program 1 times [2020-10-13 14:32:55,456 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:55,456 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1975859088] [2020-10-13 14:32:55,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:55,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:55,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:55,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:55,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:56,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:58,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:58,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:32:58,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:32:58,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2929 [2020-10-13 14:32:58,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:58,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:32:58,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:32:58,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:32:58,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:32:58,570 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:32:58,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:58,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:58,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:32:58,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:32:58,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:32:58,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:32:58,583 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:32:58,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:32:58,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:32:58,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:32:58,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:32:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:32:58,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1975859088] [2020-10-13 14:32:58,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:32:58,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:32:58,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319632541] [2020-10-13 14:32:58,603 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:32:58,603 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:32:58,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:32:58,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:32:58,604 INFO L87 Difference]: Start difference. First operand 1172 states and 1695 transitions. Second operand 6 states. [2020-10-13 14:32:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:32:59,668 INFO L93 Difference]: Finished difference Result 5018 states and 7327 transitions. [2020-10-13 14:32:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:32:59,668 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-13 14:32:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:32:59,690 INFO L225 Difference]: With dead ends: 5018 [2020-10-13 14:32:59,690 INFO L226 Difference]: Without dead ends: 4212 [2020-10-13 14:32:59,694 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:32:59,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4212 states. [2020-10-13 14:32:59,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4212 to 1270. [2020-10-13 14:32:59,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1270 states. [2020-10-13 14:32:59,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1270 states to 1270 states and 1801 transitions. [2020-10-13 14:32:59,829 INFO L78 Accepts]: Start accepts. Automaton has 1270 states and 1801 transitions. Word has length 58 [2020-10-13 14:32:59,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:32:59,830 INFO L479 AbstractCegarLoop]: Abstraction has 1270 states and 1801 transitions. [2020-10-13 14:32:59,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:32:59,830 INFO L276 IsEmpty]: Start isEmpty. Operand 1270 states and 1801 transitions. [2020-10-13 14:32:59,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:32:59,832 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:32:59,832 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] [2020-10-13 14:32:59,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 14:32:59,833 INFO L427 AbstractCegarLoop]: === Iteration 6 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:32:59,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:32:59,833 INFO L82 PathProgramCache]: Analyzing trace with hash -709067147, now seen corresponding path program 1 times [2020-10-13 14:32:59,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:32:59,834 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149343430] [2020-10-13 14:32:59,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:32:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:32:59,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:59,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:32:59,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:00,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:00,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:02,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:02,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:33:02,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:33:02,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2536 [2020-10-13 14:33:02,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:33:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:33:02,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 14:33:02,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:02,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:33:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:02,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:02,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:02,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:33:02,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:33:02,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:33:02,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:02,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:33:02,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:33:02,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:33:02,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:02,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:33:02,553 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149343430] [2020-10-13 14:33:02,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:33:02,553 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:33:02,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698281706] [2020-10-13 14:33:02,554 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:33:02,554 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:33:02,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:33:02,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:33:02,555 INFO L87 Difference]: Start difference. First operand 1270 states and 1801 transitions. Second operand 6 states. [2020-10-13 14:33:03,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:33:03,731 INFO L93 Difference]: Finished difference Result 6134 states and 8773 transitions. [2020-10-13 14:33:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:33:03,731 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-13 14:33:03,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:33:03,757 INFO L225 Difference]: With dead ends: 6134 [2020-10-13 14:33:03,757 INFO L226 Difference]: Without dead ends: 5284 [2020-10-13 14:33:03,762 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:33:03,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5284 states. [2020-10-13 14:33:03,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5284 to 1376. [2020-10-13 14:33:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1376 states. [2020-10-13 14:33:03,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1376 states to 1376 states and 1905 transitions. [2020-10-13 14:33:03,919 INFO L78 Accepts]: Start accepts. Automaton has 1376 states and 1905 transitions. Word has length 58 [2020-10-13 14:33:03,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:33:03,919 INFO L479 AbstractCegarLoop]: Abstraction has 1376 states and 1905 transitions. [2020-10-13 14:33:03,919 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:33:03,919 INFO L276 IsEmpty]: Start isEmpty. Operand 1376 states and 1905 transitions. [2020-10-13 14:33:03,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-13 14:33:03,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:33:03,922 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] [2020-10-13 14:33:03,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 14:33:03,922 INFO L427 AbstractCegarLoop]: === Iteration 7 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:33:03,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:33:03,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1985667494, now seen corresponding path program 1 times [2020-10-13 14:33:03,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:33:03,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1342405053] [2020-10-13 14:33:03,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:33:03,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:03,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:03,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:03,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:04,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:04,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:05,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:05,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 14:33:05,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 14:33:05,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1867 [2020-10-13 14:33:05,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:33:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:33:05,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 14:33:05,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:05,970 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:33:05,971 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:33:05,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:05,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:05,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:05,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:33:05,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:33:05,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:33:05,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:05,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:33:05,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:33:05,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:33:05,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 14:33:06,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:33:06,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1342405053] [2020-10-13 14:33:06,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:33:06,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:33:06,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527132294] [2020-10-13 14:33:06,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:33:06,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:33:06,005 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:33:06,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:33:06,005 INFO L87 Difference]: Start difference. First operand 1376 states and 1905 transitions. Second operand 6 states. [2020-10-13 14:33:07,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:33:07,313 INFO L93 Difference]: Finished difference Result 4752 states and 6649 transitions. [2020-10-13 14:33:07,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 14:33:07,314 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 58 [2020-10-13 14:33:07,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:33:07,332 INFO L225 Difference]: With dead ends: 4752 [2020-10-13 14:33:07,332 INFO L226 Difference]: Without dead ends: 3855 [2020-10-13 14:33:07,336 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-13 14:33:07,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2020-10-13 14:33:07,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 1439. [2020-10-13 14:33:07,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1439 states. [2020-10-13 14:33:07,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1439 states to 1439 states and 1952 transitions. [2020-10-13 14:33:07,478 INFO L78 Accepts]: Start accepts. Automaton has 1439 states and 1952 transitions. Word has length 58 [2020-10-13 14:33:07,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:33:07,478 INFO L479 AbstractCegarLoop]: Abstraction has 1439 states and 1952 transitions. [2020-10-13 14:33:07,478 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:33:07,478 INFO L276 IsEmpty]: Start isEmpty. Operand 1439 states and 1952 transitions. [2020-10-13 14:33:07,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:33:07,481 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:33:07,481 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] [2020-10-13 14:33:07,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 14:33:07,481 INFO L427 AbstractCegarLoop]: === Iteration 8 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:33:07,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:33:07,482 INFO L82 PathProgramCache]: Analyzing trace with hash 1304223984, now seen corresponding path program 1 times [2020-10-13 14:33:07,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:33:07,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513255135] [2020-10-13 14:33:07,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:33:07,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:07,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:07,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:07,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:07,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:07,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:07,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:09,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:09,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:10,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:10,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:10,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:12,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:12,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:12,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:33:12,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:33:12,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:33:12,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:33:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:33:12,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:33:12,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:12,698 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-13 14:33:12,699 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:33:12,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:12,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:12,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:12,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:33:12,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:33:12,712 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:33:12,712 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:33:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:33:12,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:33:12,713 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:33:12,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513255135] [2020-10-13 14:33:12,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:33:12,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:33:12,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978360496] [2020-10-13 14:33:12,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:33:12,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:33:12,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:33:12,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:33:12,725 INFO L87 Difference]: Start difference. First operand 1439 states and 1952 transitions. Second operand 7 states. [2020-10-13 14:33:14,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:33:14,757 INFO L93 Difference]: Finished difference Result 8515 states and 12029 transitions. [2020-10-13 14:33:14,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:33:14,758 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-13 14:33:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:33:14,798 INFO L225 Difference]: With dead ends: 8515 [2020-10-13 14:33:14,798 INFO L226 Difference]: Without dead ends: 7262 [2020-10-13 14:33:14,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:33:14,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7262 states. [2020-10-13 14:33:15,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7262 to 5390. [2020-10-13 14:33:15,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5390 states. [2020-10-13 14:33:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5390 states to 5390 states and 7549 transitions. [2020-10-13 14:33:15,326 INFO L78 Accepts]: Start accepts. Automaton has 5390 states and 7549 transitions. Word has length 59 [2020-10-13 14:33:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:33:15,327 INFO L479 AbstractCegarLoop]: Abstraction has 5390 states and 7549 transitions. [2020-10-13 14:33:15,327 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:33:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 5390 states and 7549 transitions. [2020-10-13 14:33:15,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:33:15,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:33:15,329 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] [2020-10-13 14:33:15,330 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 14:33:15,330 INFO L427 AbstractCegarLoop]: === Iteration 9 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:33:15,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:33:15,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1478036705, now seen corresponding path program 1 times [2020-10-13 14:33:15,331 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:33:15,331 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263263315] [2020-10-13 14:33:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:33:15,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:15,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:15,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:15,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:15,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:15,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:15,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:15,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:16,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:16,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:16,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:16,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:18,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:20,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:20,349 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:33:20,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:33:20,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 14:33:20,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:33:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:33:20,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 14:33:20,350 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:20,491 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:33:20,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:20,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:20,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:20,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:33:20,502 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:33:20,502 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:33:20,502 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:20,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:33:20,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:33:20,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:33:20,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:20,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:33:20,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263263315] [2020-10-13 14:33:20,513 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:33:20,513 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:33:20,513 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071471624] [2020-10-13 14:33:20,514 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:33:20,514 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:33:20,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:33:20,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:33:20,514 INFO L87 Difference]: Start difference. First operand 5390 states and 7549 transitions. Second operand 7 states. [2020-10-13 14:33:20,662 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:33:23,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:33:23,558 INFO L93 Difference]: Finished difference Result 32144 states and 45850 transitions. [2020-10-13 14:33:23,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:33:23,559 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-13 14:33:23,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:33:23,637 INFO L225 Difference]: With dead ends: 32144 [2020-10-13 14:33:23,637 INFO L226 Difference]: Without dead ends: 27266 [2020-10-13 14:33:23,655 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:33:23,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27266 states. [2020-10-13 14:33:24,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27266 to 12291. [2020-10-13 14:33:24,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12291 states. [2020-10-13 14:33:24,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12291 states to 12291 states and 17368 transitions. [2020-10-13 14:33:24,786 INFO L78 Accepts]: Start accepts. Automaton has 12291 states and 17368 transitions. Word has length 59 [2020-10-13 14:33:24,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:33:24,787 INFO L479 AbstractCegarLoop]: Abstraction has 12291 states and 17368 transitions. [2020-10-13 14:33:24,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:33:24,787 INFO L276 IsEmpty]: Start isEmpty. Operand 12291 states and 17368 transitions. [2020-10-13 14:33:24,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 14:33:24,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:33:24,790 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] [2020-10-13 14:33:24,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 14:33:24,790 INFO L427 AbstractCegarLoop]: === Iteration 10 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:33:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:33:24,791 INFO L82 PathProgramCache]: Analyzing trace with hash 375892494, now seen corresponding path program 1 times [2020-10-13 14:33:24,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:33:24,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1190194501] [2020-10-13 14:33:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:33:24,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:24,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:24,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:24,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:24,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:25,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:26,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:26,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:26,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:26,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:27,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:27,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:27,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:29,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:29,815 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 14:33:29,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-13 14:33:29,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:33:29,815 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 14:33:29,815 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:33:29,816 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 14:33:29,816 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:29,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:33:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:29,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:29,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:29,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:33:29,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:33:29,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:33:29,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:33:29,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:33:29,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:33:29,952 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:29,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:33:29,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1190194501] [2020-10-13 14:33:29,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:33:29,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-13 14:33:29,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126590937] [2020-10-13 14:33:29,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 14:33:29,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:33:29,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 14:33:29,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-13 14:33:29,963 INFO L87 Difference]: Start difference. First operand 12291 states and 17368 transitions. Second operand 7 states. [2020-10-13 14:33:30,101 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 116 [2020-10-13 14:33:33,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:33:33,094 INFO L93 Difference]: Finished difference Result 44727 states and 63399 transitions. [2020-10-13 14:33:33,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 14:33:33,099 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 59 [2020-10-13 14:33:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:33:33,186 INFO L225 Difference]: With dead ends: 44727 [2020-10-13 14:33:33,186 INFO L226 Difference]: Without dead ends: 34513 [2020-10-13 14:33:33,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-13 14:33:33,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34513 states. [2020-10-13 14:33:34,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34513 to 18605. [2020-10-13 14:33:34,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18605 states. [2020-10-13 14:33:34,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18605 states to 18605 states and 26416 transitions. [2020-10-13 14:33:34,777 INFO L78 Accepts]: Start accepts. Automaton has 18605 states and 26416 transitions. Word has length 59 [2020-10-13 14:33:34,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:33:34,778 INFO L479 AbstractCegarLoop]: Abstraction has 18605 states and 26416 transitions. [2020-10-13 14:33:34,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 14:33:34,778 INFO L276 IsEmpty]: Start isEmpty. Operand 18605 states and 26416 transitions. [2020-10-13 14:33:34,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:33:34,782 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:33:34,782 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] [2020-10-13 14:33:34,782 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 14:33:34,782 INFO L427 AbstractCegarLoop]: === Iteration 11 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:33:34,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:33:34,783 INFO L82 PathProgramCache]: Analyzing trace with hash -608678275, now seen corresponding path program 1 times [2020-10-13 14:33:34,783 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:33:34,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692474668] [2020-10-13 14:33:34,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:33:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:34,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:34,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:34,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:34,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:34,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:35,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:36,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:38,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:38,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:33:38,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:33:38,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3485 [2020-10-13 14:33:38,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:38,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:33:38,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:33:38,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 14:33:38,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:38,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:33:38,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:38,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:38,415 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:38,415 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:33:38,415 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:33:38,415 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:33:38,415 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:38,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:33:38,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:33:38,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:33:38,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:38,424 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:33:38,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692474668] [2020-10-13 14:33:38,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:33:38,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 14:33:38,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298951805] [2020-10-13 14:33:38,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:33:38,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:33:38,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:33:38,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:33:38,426 INFO L87 Difference]: Start difference. First operand 18605 states and 26416 transitions. Second operand 6 states. [2020-10-13 14:33:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:33:44,703 INFO L93 Difference]: Finished difference Result 92522 states and 131993 transitions. [2020-10-13 14:33:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 14:33:44,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 14:33:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:33:44,874 INFO L225 Difference]: With dead ends: 92522 [2020-10-13 14:33:44,874 INFO L226 Difference]: Without dead ends: 78162 [2020-10-13 14:33:44,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:33:44,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78162 states. [2020-10-13 14:33:48,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78162 to 29253. [2020-10-13 14:33:48,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29253 states. [2020-10-13 14:33:48,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29253 states to 29253 states and 41710 transitions. [2020-10-13 14:33:48,562 INFO L78 Accepts]: Start accepts. Automaton has 29253 states and 41710 transitions. Word has length 60 [2020-10-13 14:33:48,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:33:48,562 INFO L479 AbstractCegarLoop]: Abstraction has 29253 states and 41710 transitions. [2020-10-13 14:33:48,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:33:48,562 INFO L276 IsEmpty]: Start isEmpty. Operand 29253 states and 41710 transitions. [2020-10-13 14:33:48,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:33:48,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:33:48,567 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] [2020-10-13 14:33:48,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 14:33:48,567 INFO L427 AbstractCegarLoop]: === Iteration 12 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:33:48,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:33:48,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1089608510, now seen corresponding path program 1 times [2020-10-13 14:33:48,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:33:48,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1030039151] [2020-10-13 14:33:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:33:48,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:48,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:48,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:48,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:48,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:49,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:49,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:49,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:50,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:50,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:50,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:51,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:51,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:51,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:51,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:52,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:52,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:53,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:53,591 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:53,592 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:33:53,592 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-13 14:33:53,592 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 14:33:53,592 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:33:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:33:53,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 14:33:53,593 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:53,887 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:33:53,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:33:53,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:33:53,899 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:33:53,899 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:33:53,899 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:33:53,900 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 14:33:53,900 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:33:53,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:33:53,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:33:53,900 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:33:53,900 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:33:53,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:33:53,912 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1030039151] [2020-10-13 14:33:53,912 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:33:53,912 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:33:53,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297869180] [2020-10-13 14:33:53,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:33:53,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:33:53,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:33:53,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:33:53,914 INFO L87 Difference]: Start difference. First operand 29253 states and 41710 transitions. Second operand 11 states. [2020-10-13 14:34:08,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:08,154 INFO L93 Difference]: Finished difference Result 186156 states and 262396 transitions. [2020-10-13 14:34:08,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 14:34:08,154 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-13 14:34:08,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:08,428 INFO L225 Difference]: With dead ends: 186156 [2020-10-13 14:34:08,428 INFO L226 Difference]: Without dead ends: 172493 [2020-10-13 14:34:08,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=219, Invalid=711, Unknown=0, NotChecked=0, Total=930 [2020-10-13 14:34:08,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172493 states. [2020-10-13 14:34:11,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172493 to 29240. [2020-10-13 14:34:11,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29240 states. [2020-10-13 14:34:11,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29240 states to 29240 states and 41686 transitions. [2020-10-13 14:34:11,443 INFO L78 Accepts]: Start accepts. Automaton has 29240 states and 41686 transitions. Word has length 60 [2020-10-13 14:34:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:11,443 INFO L479 AbstractCegarLoop]: Abstraction has 29240 states and 41686 transitions. [2020-10-13 14:34:11,443 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:34:11,443 INFO L276 IsEmpty]: Start isEmpty. Operand 29240 states and 41686 transitions. [2020-10-13 14:34:11,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:34:11,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:11,446 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] [2020-10-13 14:34:11,446 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 14:34:11,446 INFO L427 AbstractCegarLoop]: === Iteration 13 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:11,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:11,446 INFO L82 PathProgramCache]: Analyzing trace with hash 1027712881, now seen corresponding path program 1 times [2020-10-13 14:34:11,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:11,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682432728] [2020-10-13 14:34:11,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:11,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:11,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:11,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:11,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:12,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:12,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:13,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:15,581 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:15,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:34:15,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:34:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4121 [2020-10-13 14:34:15,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:34:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:34:15,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 14:34:15,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:15,714 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:15,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:15,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:15,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:15,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:15,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:15,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:34:15,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:15,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:34:15,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:15,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:34:15,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:15,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:15,733 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682432728] [2020-10-13 14:34:15,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:15,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:34:15,734 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99260119] [2020-10-13 14:34:15,734 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:34:15,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:15,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:34:15,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:34:15,735 INFO L87 Difference]: Start difference. First operand 29240 states and 41686 transitions. Second operand 6 states. [2020-10-13 14:34:15,869 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-13 14:34:19,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:19,446 INFO L93 Difference]: Finished difference Result 66334 states and 94926 transitions. [2020-10-13 14:34:19,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:34:19,451 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 14:34:19,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:19,501 INFO L225 Difference]: With dead ends: 66334 [2020-10-13 14:34:19,501 INFO L226 Difference]: Without dead ends: 39522 [2020-10-13 14:34:19,531 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-13 14:34:19,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39522 states. [2020-10-13 14:34:23,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39522 to 38854. [2020-10-13 14:34:23,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38854 states. [2020-10-13 14:34:23,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38854 states to 38854 states and 55198 transitions. [2020-10-13 14:34:23,747 INFO L78 Accepts]: Start accepts. Automaton has 38854 states and 55198 transitions. Word has length 60 [2020-10-13 14:34:23,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:23,747 INFO L479 AbstractCegarLoop]: Abstraction has 38854 states and 55198 transitions. [2020-10-13 14:34:23,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:34:23,747 INFO L276 IsEmpty]: Start isEmpty. Operand 38854 states and 55198 transitions. [2020-10-13 14:34:23,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:34:23,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:23,750 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] [2020-10-13 14:34:23,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 14:34:23,750 INFO L427 AbstractCegarLoop]: === Iteration 14 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:23,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:23,751 INFO L82 PathProgramCache]: Analyzing trace with hash 621674077, now seen corresponding path program 1 times [2020-10-13 14:34:23,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:23,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646918366] [2020-10-13 14:34:23,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:23,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:23,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:23,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:23,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:23,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:24,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:24,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:24,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:24,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:24,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:24,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:24,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:24,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:25,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:27,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:28,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:28,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:34:28,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-13 14:34:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:34:28,771 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 14:34:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 14:34:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 14:34:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:29,008 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 27 [2020-10-13 14:34:29,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:29,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:29,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:29,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:29,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:29,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:34:29,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:34:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:29,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:34:29,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:29,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:29,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646918366] [2020-10-13 14:34:29,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:29,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-13 14:34:29,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724678719] [2020-10-13 14:34:29,186 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 14:34:29,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:29,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 14:34:29,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2020-10-13 14:34:29,187 INFO L87 Difference]: Start difference. First operand 38854 states and 55198 transitions. Second operand 11 states. [2020-10-13 14:34:29,367 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 118 [2020-10-13 14:34:47,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:34:47,444 INFO L93 Difference]: Finished difference Result 197132 states and 277107 transitions. [2020-10-13 14:34:47,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 14:34:47,445 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-13 14:34:47,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:34:47,691 INFO L225 Difference]: With dead ends: 197132 [2020-10-13 14:34:47,691 INFO L226 Difference]: Without dead ends: 180283 [2020-10-13 14:34:47,759 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=514, Unknown=0, NotChecked=0, Total=650 [2020-10-13 14:34:47,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180283 states. [2020-10-13 14:34:52,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180283 to 38825. [2020-10-13 14:34:52,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38825 states. [2020-10-13 14:34:52,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38825 states to 38825 states and 55155 transitions. [2020-10-13 14:34:52,404 INFO L78 Accepts]: Start accepts. Automaton has 38825 states and 55155 transitions. Word has length 60 [2020-10-13 14:34:52,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:34:52,405 INFO L479 AbstractCegarLoop]: Abstraction has 38825 states and 55155 transitions. [2020-10-13 14:34:52,405 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 14:34:52,405 INFO L276 IsEmpty]: Start isEmpty. Operand 38825 states and 55155 transitions. [2020-10-13 14:34:52,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 14:34:52,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:34:52,407 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] [2020-10-13 14:34:52,407 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 14:34:52,407 INFO L427 AbstractCegarLoop]: === Iteration 15 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:34:52,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:34:52,408 INFO L82 PathProgramCache]: Analyzing trace with hash -480470134, now seen corresponding path program 1 times [2020-10-13 14:34:52,408 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:34:52,408 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2130124302] [2020-10-13 14:34:52,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:34:53,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:53,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:53,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:53,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:53,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:54,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:54,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:54,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:56,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:56,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-13 14:34:56,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 14:34:56,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2937 [2020-10-13 14:34:56,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:34:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:34:56,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 14:34:56,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:56,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:34:56,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:34:56,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:34:56,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:34:56,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:34:56,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:34:56,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 14:34:56,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:34:56,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:34:56,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:34:56,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:34:56,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:34:56,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:34:56,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2130124302] [2020-10-13 14:34:56,892 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:34:56,892 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:34:56,892 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792970487] [2020-10-13 14:34:56,893 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:34:56,893 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:34:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:34:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:34:56,893 INFO L87 Difference]: Start difference. First operand 38825 states and 55155 transitions. Second operand 6 states. [2020-10-13 14:34:57,030 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:35:00,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:35:00,899 INFO L93 Difference]: Finished difference Result 56326 states and 79932 transitions. [2020-10-13 14:35:00,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:35:00,900 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 60 [2020-10-13 14:35:00,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:35:00,945 INFO L225 Difference]: With dead ends: 56326 [2020-10-13 14:35:00,945 INFO L226 Difference]: Without dead ends: 35659 [2020-10-13 14:35:00,972 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:35:01,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35659 states. [2020-10-13 14:35:04,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35659 to 35513. [2020-10-13 14:35:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35513 states. [2020-10-13 14:35:04,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35513 states to 35513 states and 50362 transitions. [2020-10-13 14:35:04,552 INFO L78 Accepts]: Start accepts. Automaton has 35513 states and 50362 transitions. Word has length 60 [2020-10-13 14:35:04,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:35:04,552 INFO L479 AbstractCegarLoop]: Abstraction has 35513 states and 50362 transitions. [2020-10-13 14:35:04,552 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:35:04,552 INFO L276 IsEmpty]: Start isEmpty. Operand 35513 states and 50362 transitions. [2020-10-13 14:35:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:35:04,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:35:04,554 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] [2020-10-13 14:35:04,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 14:35:04,554 INFO L427 AbstractCegarLoop]: === Iteration 16 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:35:04,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:35:04,554 INFO L82 PathProgramCache]: Analyzing trace with hash -260036395, now seen corresponding path program 1 times [2020-10-13 14:35:04,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:35:04,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218336113] [2020-10-13 14:35:04,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:35:04,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:04,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:04,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:04,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:04,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:04,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:05,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:05,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:05,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:05,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:09,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:09,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:35:09,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-13 14:35:09,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-13 14:35:09,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:09,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:35:09,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-13 14:35:09,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 14:35:09,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:09,814 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 37 [2020-10-13 14:35:09,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:35:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:09,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:09,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:09,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:35:09,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:35:09,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 14:35:09,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:09,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:35:09,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:35:09,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:35:09,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:10,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:35:10,010 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218336113] [2020-10-13 14:35:10,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:35:10,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:35:10,010 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784722118] [2020-10-13 14:35:10,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:35:10,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:35:10,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:35:10,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:35:10,012 INFO L87 Difference]: Start difference. First operand 35513 states and 50362 transitions. Second operand 12 states. [2020-10-13 14:35:10,387 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 136 [2020-10-13 14:35:10,739 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-13 14:35:10,887 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-13 14:35:11,027 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-13 14:35:11,215 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-13 14:35:11,343 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-13 14:35:11,578 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-13 14:35:11,756 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 40 [2020-10-13 14:35:27,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:35:27,217 INFO L93 Difference]: Finished difference Result 130343 states and 182604 transitions. [2020-10-13 14:35:27,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 14:35:27,218 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-13 14:35:27,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:35:27,360 INFO L225 Difference]: With dead ends: 130343 [2020-10-13 14:35:27,360 INFO L226 Difference]: Without dead ends: 113405 [2020-10-13 14:35:27,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=215, Invalid=975, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 14:35:27,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113405 states. [2020-10-13 14:35:32,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113405 to 35517. [2020-10-13 14:35:32,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35517 states. [2020-10-13 14:35:32,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35517 states to 35517 states and 50364 transitions. [2020-10-13 14:35:32,150 INFO L78 Accepts]: Start accepts. Automaton has 35517 states and 50364 transitions. Word has length 61 [2020-10-13 14:35:32,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:35:32,150 INFO L479 AbstractCegarLoop]: Abstraction has 35517 states and 50364 transitions. [2020-10-13 14:35:32,150 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:35:32,150 INFO L276 IsEmpty]: Start isEmpty. Operand 35517 states and 50364 transitions. [2020-10-13 14:35:32,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:35:32,152 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:35:32,152 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] [2020-10-13 14:35:32,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 14:35:32,153 INFO L427 AbstractCegarLoop]: === Iteration 17 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:35:32,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:35:32,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1102998260, now seen corresponding path program 1 times [2020-10-13 14:35:32,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:35:32,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823100838] [2020-10-13 14:35:32,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:35:32,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:32,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,334 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:32,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:33,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:36,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:36,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:35:36,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:35:36,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4680 [2020-10-13 14:35:36,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 14:35:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-13 14:35:36,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 14:35:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:37,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:35:37,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:37,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:37,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:37,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:35:37,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:35:37,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-13 14:35:37,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:37,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 14:35:37,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:35:37,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 14:35:37,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:37,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:35:37,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823100838] [2020-10-13 14:35:37,035 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:35:37,035 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-13 14:35:37,036 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628816183] [2020-10-13 14:35:37,036 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 14:35:37,036 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:35:37,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 14:35:37,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 14:35:37,037 INFO L87 Difference]: Start difference. First operand 35517 states and 50364 transitions. Second operand 6 states. [2020-10-13 14:35:37,172 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 121 [2020-10-13 14:35:39,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:35:39,863 INFO L93 Difference]: Finished difference Result 35593 states and 50438 transitions. [2020-10-13 14:35:39,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 14:35:39,863 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 61 [2020-10-13 14:35:39,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:35:39,885 INFO L225 Difference]: With dead ends: 35593 [2020-10-13 14:35:39,885 INFO L226 Difference]: Without dead ends: 18133 [2020-10-13 14:35:39,901 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-10-13 14:35:39,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18133 states. [2020-10-13 14:35:42,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18133 to 18059. [2020-10-13 14:35:42,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18059 states. [2020-10-13 14:35:42,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18059 states to 18059 states and 25519 transitions. [2020-10-13 14:35:42,083 INFO L78 Accepts]: Start accepts. Automaton has 18059 states and 25519 transitions. Word has length 61 [2020-10-13 14:35:42,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:35:42,083 INFO L479 AbstractCegarLoop]: Abstraction has 18059 states and 25519 transitions. [2020-10-13 14:35:42,083 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 14:35:42,084 INFO L276 IsEmpty]: Start isEmpty. Operand 18059 states and 25519 transitions. [2020-10-13 14:35:42,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:35:42,085 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:35:42,085 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] [2020-10-13 14:35:42,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 14:35:42,085 INFO L427 AbstractCegarLoop]: === Iteration 18 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:35:42,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:35:42,085 INFO L82 PathProgramCache]: Analyzing trace with hash 250275189, now seen corresponding path program 1 times [2020-10-13 14:35:42,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:35:42,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025530927] [2020-10-13 14:35:42,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:35:42,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:42,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:42,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:42,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:42,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:42,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:42,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:43,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:43,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:44,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:47,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:47,100 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:35:47,100 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:35:47,100 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 14:35:47,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:35:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 14:35:47,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 14:35:47,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:47,482 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:35:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:35:47,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:35:47,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:35:47,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:35:47,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:35:47,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:35:47,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:35:47,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:35:47,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:35:47,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:35:47,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:35:47,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:35:47,499 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025530927] [2020-10-13 14:35:47,499 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:35:47,499 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:35:47,499 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162163483] [2020-10-13 14:35:47,500 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:35:47,500 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:35:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:35:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:35:47,501 INFO L87 Difference]: Start difference. First operand 18059 states and 25519 transitions. Second operand 12 states. [2020-10-13 14:35:47,698 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 129 [2020-10-13 14:36:07,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 14:36:07,765 INFO L93 Difference]: Finished difference Result 108149 states and 150760 transitions. [2020-10-13 14:36:07,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 14:36:07,766 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-13 14:36:07,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 14:36:07,871 INFO L225 Difference]: With dead ends: 108149 [2020-10-13 14:36:07,871 INFO L226 Difference]: Without dead ends: 91186 [2020-10-13 14:36:07,895 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 403 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 14:36:07,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91186 states. [2020-10-13 14:36:11,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91186 to 18054. [2020-10-13 14:36:11,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18054 states. [2020-10-13 14:36:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18054 states to 18054 states and 25511 transitions. [2020-10-13 14:36:11,346 INFO L78 Accepts]: Start accepts. Automaton has 18054 states and 25511 transitions. Word has length 61 [2020-10-13 14:36:11,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 14:36:11,346 INFO L479 AbstractCegarLoop]: Abstraction has 18054 states and 25511 transitions. [2020-10-13 14:36:11,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 14:36:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 18054 states and 25511 transitions. [2020-10-13 14:36:11,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 14:36:11,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 14:36:11,347 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] [2020-10-13 14:36:11,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 14:36:11,348 INFO L427 AbstractCegarLoop]: === Iteration 19 === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 14:36:11,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 14:36:11,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1466577107, now seen corresponding path program 1 times [2020-10-13 14:36:11,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 14:36:11,349 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619868026] [2020-10-13 14:36:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 14:36:11,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:11,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:11,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:12,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:12,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:12,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:13,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:13,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:13,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:16,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:16,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 14:36:16,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-13 14:36:16,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 14:36:16,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:16,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 14:36:16,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 14:36:16,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 14:36:16,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:16,657 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 31 [2020-10-13 14:36:16,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 14:36:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 14:36:16,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 14:36:16,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 14:36:16,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 14:36:16,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 14:36:16,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 14:36:16,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 14:36:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 14:36:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 14:36:16,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 14:36:16,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 14:36:16,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 14:36:16,845 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619868026] [2020-10-13 14:36:16,845 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 14:36:16,845 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2020-10-13 14:36:16,845 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677548557] [2020-10-13 14:36:16,845 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 14:36:16,845 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 14:36:16,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 14:36:16,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-10-13 14:36:16,846 INFO L87 Difference]: Start difference. First operand 18054 states and 25511 transitions. Second operand 12 states. [2020-10-13 14:36:17,033 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 128