/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/array-examples/sanfoundry_02_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:38:23,626 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:38:23,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:38:23,667 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:38:23,668 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:38:23,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:38:23,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:38:23,681 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:38:23,683 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:38:23,686 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:38:23,687 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:38:23,688 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:38:23,688 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:38:23,691 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:38:23,694 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:38:23,695 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:38:23,696 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:38:23,697 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:38:23,698 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:38:23,705 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:38:23,708 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:38:23,708 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:38:23,709 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:38:23,710 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:38:23,720 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:38:23,720 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:38:23,720 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:38:23,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:38:23,722 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:38:23,725 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:38:23,725 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:38:23,726 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:38:23,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:38:23,728 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:38:23,729 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:38:23,729 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:38:23,730 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:38:23,730 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:38:23,731 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:38:23,731 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:38:23,732 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:38:23,733 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 04:38:23,772 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:38:23,772 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:38:23,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:38:23,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:38:23,775 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:38:23,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:38:23,775 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:38:23,775 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:38:23,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:38:23,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:38:23,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:38:23,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:38:23,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:38:23,778 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:38:23,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:38:23,778 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:38:23,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:38:23,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:38:23,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:38:23,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:38:23,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:38:23,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:38:23,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:38:23,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:38:23,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:38:23,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:38:23,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:38:23,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:38:23,781 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:38:23,781 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 04:38:24,058 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:38:24,073 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:38:24,077 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:38:24,078 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:38:24,078 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:38:24,079 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-13 04:38:24,136 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04618038c/0325d85d6e38417c83252da6b290a6de/FLAG2cae8e986 [2020-10-13 04:38:24,543 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:38:24,544 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/sanfoundry_02_ground.i [2020-10-13 04:38:24,550 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04618038c/0325d85d6e38417c83252da6b290a6de/FLAG2cae8e986 [2020-10-13 04:38:24,968 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/04618038c/0325d85d6e38417c83252da6b290a6de [2020-10-13 04:38:24,978 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:38:24,980 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:38:24,984 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:24,984 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:38:24,988 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:38:24,989 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:24" (1/1) ... [2020-10-13 04:38:24,992 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@256ae262 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:24, skipping insertion in model container [2020-10-13 04:38:24,993 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:38:24" (1/1) ... [2020-10-13 04:38:25,001 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:38:25,022 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:38:25,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:25,188 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:38:25,214 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:38:25,233 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:38:25,233 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25 WrapperNode [2020-10-13 04:38:25,234 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:38:25,234 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:38:25,234 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:38:25,235 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:38:25,319 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (1/1) ... [2020-10-13 04:38:25,319 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (1/1) ... [2020-10-13 04:38:25,327 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (1/1) ... [2020-10-13 04:38:25,327 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (1/1) ... [2020-10-13 04:38:25,335 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (1/1) ... [2020-10-13 04:38:25,342 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (1/1) ... [2020-10-13 04:38:25,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (1/1) ... [2020-10-13 04:38:25,346 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:38:25,346 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:38:25,347 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:38:25,347 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:38:25,348 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (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 04:38:25,410 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:38:25,411 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:38:25,411 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:38:25,411 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:38:25,411 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:38:25,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:38:25,412 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:38:25,412 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:38:25,412 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:38:25,412 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:38:25,412 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:38:25,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:38:25,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:38:25,413 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:38:25,696 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:38:25,696 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 04:38:25,700 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:25 BoogieIcfgContainer [2020-10-13 04:38:25,701 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:38:25,702 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:38:25,703 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:38:25,706 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:38:25,706 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:38:24" (1/3) ... [2020-10-13 04:38:25,707 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cd62de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:25, skipping insertion in model container [2020-10-13 04:38:25,707 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:38:25" (2/3) ... [2020-10-13 04:38:25,708 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@62cd62de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:38:25, skipping insertion in model container [2020-10-13 04:38:25,708 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:38:25" (3/3) ... [2020-10-13 04:38:25,709 INFO L109 eAbstractionObserver]: Analyzing ICFG sanfoundry_02_ground.i [2020-10-13 04:38:25,720 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:38:25,727 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:38:25,741 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:38:25,767 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:38:25,767 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:38:25,767 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:38:25,767 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:38:25,768 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:38:25,768 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:38:25,768 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:38:25,768 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:38:25,789 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-13 04:38:25,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:38:25,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:25,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:25,797 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:25,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:25,804 INFO L82 PathProgramCache]: Analyzing trace with hash -1606204250, now seen corresponding path program 1 times [2020-10-13 04:38:25,812 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:25,813 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163484087] [2020-10-13 04:38:25,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:25,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:25,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:25,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:38:26,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:26,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 408 [2020-10-13 04:38:26,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:26,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-13 04:38:26,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:26,336 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:38:26,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:26,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:26,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:26,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:38:26,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:26,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:26,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:26,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:26,415 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 04:38:26,416 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163484087] [2020-10-13 04:38:26,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:26,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:38:26,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837396267] [2020-10-13 04:38:26,424 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:38:26,424 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:26,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:38:26,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:26,438 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 3 states. [2020-10-13 04:38:26,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:26,556 INFO L93 Difference]: Finished difference Result 66 states and 92 transitions. [2020-10-13 04:38:26,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:38:26,557 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 04:38:26,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:26,567 INFO L225 Difference]: With dead ends: 66 [2020-10-13 04:38:26,568 INFO L226 Difference]: Without dead ends: 32 [2020-10-13 04:38:26,571 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:38:26,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2020-10-13 04:38:26,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2020-10-13 04:38:26,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:38:26,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2020-10-13 04:38:26,611 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 17 [2020-10-13 04:38:26,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:26,612 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2020-10-13 04:38:26,612 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:38:26,612 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2020-10-13 04:38:26,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:38:26,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:26,614 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:26,614 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:38:26,615 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:26,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:26,615 INFO L82 PathProgramCache]: Analyzing trace with hash -729587696, now seen corresponding path program 1 times [2020-10-13 04:38:26,615 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:26,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474281004] [2020-10-13 04:38:26,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:26,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:26,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:26,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:38:26,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:26,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-13 04:38:26,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:26,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:38:26,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-13 04:38:26,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:38:26,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:26,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:26,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:27,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:27,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:27,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:27,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:27,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:27,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 04:38:27,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474281004] [2020-10-13 04:38:27,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:38:27,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:38:27,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794634993] [2020-10-13 04:38:27,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:38:27,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:27,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:38:27,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:27,019 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand 4 states. [2020-10-13 04:38:27,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:27,178 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2020-10-13 04:38:27,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:38:27,179 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 04:38:27,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:27,180 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:38:27,180 INFO L226 Difference]: Without dead ends: 38 [2020-10-13 04:38:27,183 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:38:27,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-10-13 04:38:27,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 34. [2020-10-13 04:38:27,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-13 04:38:27,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 42 transitions. [2020-10-13 04:38:27,200 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 42 transitions. Word has length 17 [2020-10-13 04:38:27,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:27,200 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 42 transitions. [2020-10-13 04:38:27,201 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:38:27,201 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 42 transitions. [2020-10-13 04:38:27,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:38:27,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:27,204 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] [2020-10-13 04:38:27,205 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:38:27,206 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:27,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:27,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1226217789, now seen corresponding path program 1 times [2020-10-13 04:38:27,207 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:27,207 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647840725] [2020-10-13 04:38:27,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:27,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:27,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,879 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,879 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:38:27,879 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:27,879 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-10-13 04:38:27,879 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:27,880 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:38:27,880 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:27,933 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:27,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:27,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:27,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:27,938 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:27,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:27,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:27,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:27,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:27,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:27,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:27,944 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:38:27,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647840725] [2020-10-13 04:38:27,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:27,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:27,945 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307643822] [2020-10-13 04:38:27,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:27,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:27,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:27,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:27,948 INFO L87 Difference]: Start difference. First operand 34 states and 42 transitions. Second operand 5 states. [2020-10-13 04:38:28,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:28,064 INFO L93 Difference]: Finished difference Result 62 states and 78 transitions. [2020-10-13 04:38:28,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:28,066 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 04:38:28,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:28,067 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:38:28,067 INFO L226 Difference]: Without dead ends: 37 [2020-10-13 04:38:28,068 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:28,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-13 04:38:28,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2020-10-13 04:38:28,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-13 04:38:28,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 44 transitions. [2020-10-13 04:38:28,080 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 44 transitions. Word has length 22 [2020-10-13 04:38:28,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:28,081 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 44 transitions. [2020-10-13 04:38:28,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:28,081 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 44 transitions. [2020-10-13 04:38:28,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-13 04:38:28,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:28,083 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:28,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:38:28,083 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:28,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:28,084 INFO L82 PathProgramCache]: Analyzing trace with hash -793959649, now seen corresponding path program 2 times [2020-10-13 04:38:28,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:28,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [255552466] [2020-10-13 04:38:28,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:28,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:28,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:29,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-13 04:38:29,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:29,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-10-13 04:38:29,048 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:38:29,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:38:29,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:38:29,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:29,091 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:29,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:29,097 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:29,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:29,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:38:29,098 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:29,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:29,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:29,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 8 [2020-10-13 04:38:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 04:38:29,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [255552466] [2020-10-13 04:38:29,112 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:29,113 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:38:29,114 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532456983] [2020-10-13 04:38:29,114 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:38:29,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:29,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:38:29,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:29,117 INFO L87 Difference]: Start difference. First operand 36 states and 44 transitions. Second operand 5 states. [2020-10-13 04:38:29,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:29,294 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2020-10-13 04:38:29,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:38:29,297 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-13 04:38:29,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:29,298 INFO L225 Difference]: With dead ends: 61 [2020-10-13 04:38:29,298 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:38:29,304 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:38:29,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:38:29,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-13 04:38:29,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:38:29,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 50 transitions. [2020-10-13 04:38:29,320 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 50 transitions. Word has length 24 [2020-10-13 04:38:29,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:29,321 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 50 transitions. [2020-10-13 04:38:29,321 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:38:29,321 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 50 transitions. [2020-10-13 04:38:29,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:38:29,323 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:29,323 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:29,324 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:38:29,324 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:29,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:29,325 INFO L82 PathProgramCache]: Analyzing trace with hash 182791532, now seen corresponding path program 3 times [2020-10-13 04:38:29,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:29,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083515558] [2020-10-13 04:38:29,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:29,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:29,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:29,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:38:30,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:30,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1244 [2020-10-13 04:38:30,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:30,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:38:30,587 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:30,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:30,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:30,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:30,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:30,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:30,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:30,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:30,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:30,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:30,635 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-13 04:38:30,635 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083515558] [2020-10-13 04:38:30,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:30,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:30,636 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497437203] [2020-10-13 04:38:30,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:30,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:30,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:30,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:30,637 INFO L87 Difference]: Start difference. First operand 40 states and 50 transitions. Second operand 6 states. [2020-10-13 04:38:30,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:30,746 INFO L93 Difference]: Finished difference Result 72 states and 92 transitions. [2020-10-13 04:38:30,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:30,747 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 04:38:30,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:30,748 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:38:30,748 INFO L226 Difference]: Without dead ends: 43 [2020-10-13 04:38:30,749 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:30,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-13 04:38:30,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2020-10-13 04:38:30,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:38:30,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2020-10-13 04:38:30,756 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 27 [2020-10-13 04:38:30,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:30,756 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2020-10-13 04:38:30,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:30,756 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2020-10-13 04:38:30,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-13 04:38:30,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:30,757 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:30,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:38:30,758 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:30,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:30,758 INFO L82 PathProgramCache]: Analyzing trace with hash 446922954, now seen corresponding path program 4 times [2020-10-13 04:38:30,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:30,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205847173] [2020-10-13 04:38:30,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:30,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:30,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:30,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:31,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:32,635 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-13 04:38:32,635 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:32,635 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1864 [2020-10-13 04:38:32,635 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:32,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:38:32,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 04:38:32,636 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:32,636 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:32,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:32,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:32,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:32,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:32,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:32,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:38:32,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:32,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:32,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:32,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:32,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:32,685 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 04:38:32,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205847173] [2020-10-13 04:38:32,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:32,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:38:32,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673212679] [2020-10-13 04:38:32,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:38:32,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:32,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:38:32,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:32,688 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand 6 states. [2020-10-13 04:38:32,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:32,814 INFO L93 Difference]: Finished difference Result 67 states and 85 transitions. [2020-10-13 04:38:32,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:38:32,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-13 04:38:32,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:32,816 INFO L225 Difference]: With dead ends: 67 [2020-10-13 04:38:32,816 INFO L226 Difference]: Without dead ends: 50 [2020-10-13 04:38:32,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:38:32,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-13 04:38:32,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2020-10-13 04:38:32,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:38:32,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 58 transitions. [2020-10-13 04:38:32,824 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 58 transitions. Word has length 29 [2020-10-13 04:38:32,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:32,824 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 58 transitions. [2020-10-13 04:38:32,825 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:38:32,825 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 58 transitions. [2020-10-13 04:38:32,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:38:32,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:32,826 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:32,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:38:32,826 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:32,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:32,826 INFO L82 PathProgramCache]: Analyzing trace with hash 532900833, now seen corresponding path program 5 times [2020-10-13 04:38:32,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:32,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1324994351] [2020-10-13 04:38:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:32,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:32,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:32,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:33,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:35,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:38:35,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:35,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2918 [2020-10-13 04:38:35,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:38:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:35,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:38:35,760 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:35,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:35,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:35,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:35,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:35,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:35,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:35,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:35,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:35,807 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:38:35,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1324994351] [2020-10-13 04:38:35,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:35,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:38:35,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980171266] [2020-10-13 04:38:35,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:38:35,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:35,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:38:35,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:35,810 INFO L87 Difference]: Start difference. First operand 46 states and 58 transitions. Second operand 7 states. [2020-10-13 04:38:35,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:35,934 INFO L93 Difference]: Finished difference Result 82 states and 106 transitions. [2020-10-13 04:38:35,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:35,935 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 04:38:35,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:35,936 INFO L225 Difference]: With dead ends: 82 [2020-10-13 04:38:35,936 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:38:35,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:35,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:38:35,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 04:38:35,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:38:35,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 60 transitions. [2020-10-13 04:38:35,943 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 60 transitions. Word has length 32 [2020-10-13 04:38:35,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:35,943 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 60 transitions. [2020-10-13 04:38:35,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:38:35,943 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 60 transitions. [2020-10-13 04:38:35,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-13 04:38:35,944 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:35,944 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:35,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:38:35,945 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:35,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:35,945 INFO L82 PathProgramCache]: Analyzing trace with hash 2036892483, now seen corresponding path program 6 times [2020-10-13 04:38:35,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:35,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546947874] [2020-10-13 04:38:35,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:35,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:35,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:36,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:39,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-13 04:38:39,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:39,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3125 [2020-10-13 04:38:39,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:39,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:38:39,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:39,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:38:39,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:39,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:39,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:39,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,140 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:39,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:39,141 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:39,141 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:39,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:39,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:39,141 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:39,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:39,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:39,145 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:38:39,146 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546947874] [2020-10-13 04:38:39,146 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:39,146 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:38:39,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810254627] [2020-10-13 04:38:39,147 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:38:39,148 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:39,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:38:39,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:38:39,148 INFO L87 Difference]: Start difference. First operand 48 states and 60 transitions. Second operand 8 states. [2020-10-13 04:38:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:39,287 INFO L93 Difference]: Finished difference Result 87 states and 113 transitions. [2020-10-13 04:38:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:38:39,288 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-13 04:38:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:39,289 INFO L225 Difference]: With dead ends: 87 [2020-10-13 04:38:39,289 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 04:38:39,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:38:39,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 04:38:39,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-13 04:38:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-13 04:38:39,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 62 transitions. [2020-10-13 04:38:39,306 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 62 transitions. Word has length 34 [2020-10-13 04:38:39,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:39,306 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 62 transitions. [2020-10-13 04:38:39,306 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:38:39,306 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 62 transitions. [2020-10-13 04:38:39,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 04:38:39,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:39,308 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:39,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:38:39,308 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:39,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:39,309 INFO L82 PathProgramCache]: Analyzing trace with hash -31110619, now seen corresponding path program 7 times [2020-10-13 04:38:39,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:39,311 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854207103] [2020-10-13 04:38:39,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:39,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:39,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:39,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:42,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:42,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 04:38:42,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:42,668 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3345 [2020-10-13 04:38:42,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:42,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:38:42,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-13 04:38:42,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:38:42,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:42,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:42,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:42,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:42,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:42,726 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:42,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:42,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:42,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:42,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:42,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:42,731 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 04:38:42,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854207103] [2020-10-13 04:38:42,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:42,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:38:42,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [197866663] [2020-10-13 04:38:42,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:38:42,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:42,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:38:42,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:42,740 INFO L87 Difference]: Start difference. First operand 50 states and 62 transitions. Second operand 7 states. [2020-10-13 04:38:42,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:42,867 INFO L93 Difference]: Finished difference Result 74 states and 94 transitions. [2020-10-13 04:38:42,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:38:42,868 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-10-13 04:38:42,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:42,869 INFO L225 Difference]: With dead ends: 74 [2020-10-13 04:38:42,869 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:38:42,870 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:38:42,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:38:42,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-13 04:38:42,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:38:42,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 68 transitions. [2020-10-13 04:38:42,885 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 68 transitions. Word has length 36 [2020-10-13 04:38:42,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:42,886 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 68 transitions. [2020-10-13 04:38:42,886 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:38:42,886 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 68 transitions. [2020-10-13 04:38:42,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-13 04:38:42,890 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:42,890 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:42,890 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:38:42,890 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:42,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:42,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1546281126, now seen corresponding path program 8 times [2020-10-13 04:38:42,891 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:42,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119902086] [2020-10-13 04:38:42,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:42,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:42,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:42,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:43,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:47,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-13 04:38:47,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:47,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4401 [2020-10-13 04:38:47,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:47,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:38:47,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:47,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:38:47,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:47,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:47,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:47,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:47,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:47,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:47,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:47,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:47,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:47,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:47,392 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:38:47,393 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119902086] [2020-10-13 04:38:47,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:47,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:38:47,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952242948] [2020-10-13 04:38:47,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:38:47,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:47,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:38:47,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:47,395 INFO L87 Difference]: Start difference. First operand 54 states and 68 transitions. Second operand 9 states. [2020-10-13 04:38:47,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:47,514 INFO L93 Difference]: Finished difference Result 97 states and 127 transitions. [2020-10-13 04:38:47,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:38:47,514 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-13 04:38:47,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:47,516 INFO L225 Difference]: With dead ends: 97 [2020-10-13 04:38:47,517 INFO L226 Difference]: Without dead ends: 60 [2020-10-13 04:38:47,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:38:47,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-13 04:38:47,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2020-10-13 04:38:47,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:38:47,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-13 04:38:47,529 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 39 [2020-10-13 04:38:47,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:47,530 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-13 04:38:47,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:38:47,530 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-13 04:38:47,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:38:47,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:47,531 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:47,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:38:47,531 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:47,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:47,532 INFO L82 PathProgramCache]: Analyzing trace with hash -836724988, now seen corresponding path program 9 times [2020-10-13 04:38:47,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:47,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [663378320] [2020-10-13 04:38:47,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:47,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:47,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:47,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:51,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:38:51,672 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:51,672 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4130 [2020-10-13 04:38:51,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:38:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:51,673 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:38:51,673 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:51,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:51,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:51,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:51,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:51,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:51,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:51,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:51,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:51,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:51,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:38:51,786 INFO L134 CoverageAnalysis]: Checked inductivity of 58 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 04:38:51,786 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [663378320] [2020-10-13 04:38:51,787 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:51,787 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:38:51,787 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723011264] [2020-10-13 04:38:51,788 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:38:51,789 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:51,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:38:51,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:51,790 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 10 states. [2020-10-13 04:38:51,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:51,986 INFO L93 Difference]: Finished difference Result 103 states and 136 transitions. [2020-10-13 04:38:51,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:38:51,986 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 41 [2020-10-13 04:38:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:51,988 INFO L225 Difference]: With dead ends: 103 [2020-10-13 04:38:51,988 INFO L226 Difference]: Without dead ends: 66 [2020-10-13 04:38:51,989 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:38:51,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-13 04:38:51,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2020-10-13 04:38:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:38:52,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2020-10-13 04:38:52,001 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 41 [2020-10-13 04:38:52,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:52,002 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2020-10-13 04:38:52,002 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:38:52,002 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2020-10-13 04:38:52,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 04:38:52,005 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:52,005 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:52,005 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:38:52,006 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:52,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:52,006 INFO L82 PathProgramCache]: Analyzing trace with hash -2027681847, now seen corresponding path program 10 times [2020-10-13 04:38:52,006 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:52,007 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109895033] [2020-10-13 04:38:52,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:52,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:52,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:57,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 04:38:57,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:38:57,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:38:57,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:57,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:38:57,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:38:57,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:38:57,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:57,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:38:57,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:57,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:38:57,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:38:57,110 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:38:57,110 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:38:57,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:38:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:38:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:38:57,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:38:57,111 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:38:57,114 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-13 04:38:57,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109895033] [2020-10-13 04:38:57,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:38:57,115 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:38:57,115 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666431159] [2020-10-13 04:38:57,115 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:38:57,115 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:38:57,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:38:57,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:38:57,116 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 11 states. [2020-10-13 04:38:57,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:38:57,260 INFO L93 Difference]: Finished difference Result 113 states and 150 transitions. [2020-10-13 04:38:57,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:38:57,261 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-13 04:38:57,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:38:57,262 INFO L225 Difference]: With dead ends: 113 [2020-10-13 04:38:57,262 INFO L226 Difference]: Without dead ends: 72 [2020-10-13 04:38:57,263 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:38:57,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-13 04:38:57,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-10-13 04:38:57,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-13 04:38:57,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 86 transitions. [2020-10-13 04:38:57,267 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 86 transitions. Word has length 46 [2020-10-13 04:38:57,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:38:57,268 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 86 transitions. [2020-10-13 04:38:57,268 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:38:57,268 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 86 transitions. [2020-10-13 04:38:57,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:38:57,269 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:38:57,269 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:38:57,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:38:57,269 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:38:57,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:38:57,270 INFO L82 PathProgramCache]: Analyzing trace with hash -2134546080, now seen corresponding path program 11 times [2020-10-13 04:38:57,270 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:38:57,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183229001] [2020-10-13 04:38:57,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:38:57,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:38:57,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:38:57,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,281 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:02,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:39:02,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:02,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:39:02,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:39:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:02,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:39:02,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:02,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:02,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:02,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:02,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:02,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:02,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:02,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:02,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:02,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:02,378 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-13 04:39:02,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183229001] [2020-10-13 04:39:02,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:02,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:39:02,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901827094] [2020-10-13 04:39:02,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:39:02,380 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:02,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:39:02,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:02,381 INFO L87 Difference]: Start difference. First operand 68 states and 86 transitions. Second operand 12 states. [2020-10-13 04:39:02,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:02,552 INFO L93 Difference]: Finished difference Result 123 states and 164 transitions. [2020-10-13 04:39:02,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:39:02,553 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 51 [2020-10-13 04:39:02,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:02,554 INFO L225 Difference]: With dead ends: 123 [2020-10-13 04:39:02,554 INFO L226 Difference]: Without dead ends: 78 [2020-10-13 04:39:02,555 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:39:02,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-13 04:39:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2020-10-13 04:39:02,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 04:39:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-10-13 04:39:02,561 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 51 [2020-10-13 04:39:02,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:02,561 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-10-13 04:39:02,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:39:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-10-13 04:39:02,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 04:39:02,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:02,563 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:02,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:39:02,563 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:02,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:02,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1620888211, now seen corresponding path program 12 times [2020-10-13 04:39:02,564 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:02,564 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1671754696] [2020-10-13 04:39:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:02,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:02,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:03,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:07,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:07,581 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 04:39:07,581 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:07,581 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:39:07,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:07,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:39:07,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:07,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:39:07,582 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:07,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:07,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:07,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:07,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:07,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:07,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:07,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:07,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:07,676 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:07,679 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-13 04:39:07,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1671754696] [2020-10-13 04:39:07,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:07,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:39:07,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653587103] [2020-10-13 04:39:07,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:39:07,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:07,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:39:07,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:39:07,681 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 13 states. [2020-10-13 04:39:07,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:07,902 INFO L93 Difference]: Finished difference Result 133 states and 178 transitions. [2020-10-13 04:39:07,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:39:07,902 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 56 [2020-10-13 04:39:07,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:07,903 INFO L225 Difference]: With dead ends: 133 [2020-10-13 04:39:07,903 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 04:39:07,904 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:39:07,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 04:39:07,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2020-10-13 04:39:07,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:39:07,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 102 transitions. [2020-10-13 04:39:07,909 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 102 transitions. Word has length 56 [2020-10-13 04:39:07,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:07,909 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 102 transitions. [2020-10-13 04:39:07,909 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:39:07,909 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 102 transitions. [2020-10-13 04:39:07,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:39:07,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:07,910 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:07,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:39:07,910 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:07,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:07,911 INFO L82 PathProgramCache]: Analyzing trace with hash -5592132, now seen corresponding path program 13 times [2020-10-13 04:39:07,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:07,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597758463] [2020-10-13 04:39:07,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:07,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:07,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:07,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:08,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:12,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:12,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:39:12,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:12,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:39:12,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:12,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:39:12,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:12,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:39:12,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:13,041 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:13,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:13,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:13,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:13,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:13,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:13,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:13,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:13,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:13,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:13,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:13,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:13,050 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-13 04:39:13,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597758463] [2020-10-13 04:39:13,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:13,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:39:13,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115739916] [2020-10-13 04:39:13,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:39:13,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:13,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:39:13,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:39:13,052 INFO L87 Difference]: Start difference. First operand 80 states and 102 transitions. Second operand 14 states. [2020-10-13 04:39:13,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:13,257 INFO L93 Difference]: Finished difference Result 143 states and 192 transitions. [2020-10-13 04:39:13,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:39:13,258 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 61 [2020-10-13 04:39:13,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:13,259 INFO L225 Difference]: With dead ends: 143 [2020-10-13 04:39:13,259 INFO L226 Difference]: Without dead ends: 90 [2020-10-13 04:39:13,260 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:39:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-13 04:39:13,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-13 04:39:13,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-13 04:39:13,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 110 transitions. [2020-10-13 04:39:13,265 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 110 transitions. Word has length 61 [2020-10-13 04:39:13,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:13,266 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 110 transitions. [2020-10-13 04:39:13,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:39:13,266 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 110 transitions. [2020-10-13 04:39:13,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-13 04:39:13,267 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:13,267 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:13,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:39:13,267 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:13,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:13,268 INFO L82 PathProgramCache]: Analyzing trace with hash 1895895825, now seen corresponding path program 14 times [2020-10-13 04:39:13,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:13,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361053919] [2020-10-13 04:39:13,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:13,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:13,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:14,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:18,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:18,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-13 04:39:18,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:18,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:39:18,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:39:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:18,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:39:18,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:18,430 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:18,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:18,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:18,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:18,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:18,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:18,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:18,435 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:18,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:18,446 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-13 04:39:18,447 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361053919] [2020-10-13 04:39:18,451 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:18,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:39:18,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194446681] [2020-10-13 04:39:18,452 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:39:18,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:18,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:39:18,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:39:18,455 INFO L87 Difference]: Start difference. First operand 86 states and 110 transitions. Second operand 15 states. [2020-10-13 04:39:18,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:18,745 INFO L93 Difference]: Finished difference Result 153 states and 206 transitions. [2020-10-13 04:39:18,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:39:18,745 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 66 [2020-10-13 04:39:18,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:18,746 INFO L225 Difference]: With dead ends: 153 [2020-10-13 04:39:18,747 INFO L226 Difference]: Without dead ends: 96 [2020-10-13 04:39:18,747 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:39:18,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-13 04:39:18,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2020-10-13 04:39:18,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:39:18,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2020-10-13 04:39:18,756 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 66 [2020-10-13 04:39:18,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:18,756 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2020-10-13 04:39:18,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:39:18,756 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2020-10-13 04:39:18,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-13 04:39:18,757 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:18,757 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:18,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:39:18,757 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:18,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:18,758 INFO L82 PathProgramCache]: Analyzing trace with hash 2045910552, now seen corresponding path program 15 times [2020-10-13 04:39:18,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:18,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666893245] [2020-10-13 04:39:18,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:18,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:18,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:21,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:23,780 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:23,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-13 04:39:23,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:23,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:39:23,781 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:23,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:39:23,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:23,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:39:23,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:23,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:23,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:23,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:23,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:23,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:23,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:23,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:39:23,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:23,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:23,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:23,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:23,965 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-13 04:39:23,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666893245] [2020-10-13 04:39:23,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:23,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:39:23,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103711980] [2020-10-13 04:39:23,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:39:23,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:23,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:39:23,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:39:23,980 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand 16 states. [2020-10-13 04:39:24,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:24,280 INFO L93 Difference]: Finished difference Result 163 states and 220 transitions. [2020-10-13 04:39:24,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:39:24,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 71 [2020-10-13 04:39:24,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:24,282 INFO L225 Difference]: With dead ends: 163 [2020-10-13 04:39:24,282 INFO L226 Difference]: Without dead ends: 102 [2020-10-13 04:39:24,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:39:24,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-13 04:39:24,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2020-10-13 04:39:24,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-13 04:39:24,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 126 transitions. [2020-10-13 04:39:24,292 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 126 transitions. Word has length 71 [2020-10-13 04:39:24,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:24,294 INFO L479 AbstractCegarLoop]: Abstraction has 98 states and 126 transitions. [2020-10-13 04:39:24,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:39:24,294 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 126 transitions. [2020-10-13 04:39:24,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-13 04:39:24,303 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:24,304 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:24,304 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:39:24,304 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:24,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:24,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1016848565, now seen corresponding path program 16 times [2020-10-13 04:39:24,305 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:24,305 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650286508] [2020-10-13 04:39:24,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:24,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:24,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:24,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:27,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:29,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-13 04:39:29,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:29,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:39:29,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:39:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:39:29,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:29,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:29,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:29,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:29,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:29,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:29,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:29,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:29,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:29,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:29,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-13 04:39:29,527 INFO L134 CoverageAnalysis]: Checked inductivity of 345 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-13 04:39:29,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650286508] [2020-10-13 04:39:29,528 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:29,528 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:39:29,532 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124938462] [2020-10-13 04:39:29,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:39:29,536 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:29,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:39:29,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:39:29,536 INFO L87 Difference]: Start difference. First operand 98 states and 126 transitions. Second operand 17 states. [2020-10-13 04:39:29,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:29,754 INFO L93 Difference]: Finished difference Result 173 states and 234 transitions. [2020-10-13 04:39:29,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:39:29,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 76 [2020-10-13 04:39:29,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:29,756 INFO L225 Difference]: With dead ends: 173 [2020-10-13 04:39:29,756 INFO L226 Difference]: Without dead ends: 108 [2020-10-13 04:39:29,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:39:29,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-13 04:39:29,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2020-10-13 04:39:29,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:39:29,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 134 transitions. [2020-10-13 04:39:29,766 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 134 transitions. Word has length 76 [2020-10-13 04:39:29,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:29,766 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 134 transitions. [2020-10-13 04:39:29,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:39:29,766 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 134 transitions. [2020-10-13 04:39:29,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-13 04:39:29,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:29,767 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:29,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:39:29,768 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash 1983742068, now seen corresponding path program 17 times [2020-10-13 04:39:29,768 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:29,768 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985271982] [2020-10-13 04:39:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:29,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:29,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:32,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:34,805 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-13 04:39:34,805 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:34,805 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-13 04:39:34,805 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:39:34,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:34,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:39:34,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:34,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:34,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:34,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:34,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:34,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:34,977 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:34,977 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:34,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:34,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:34,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:34,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:34,982 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-13 04:39:34,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985271982] [2020-10-13 04:39:34,982 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:34,982 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:39:34,982 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499079776] [2020-10-13 04:39:34,983 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:39:34,983 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:34,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:39:34,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:39:34,984 INFO L87 Difference]: Start difference. First operand 104 states and 134 transitions. Second operand 18 states. [2020-10-13 04:39:35,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:35,241 INFO L93 Difference]: Finished difference Result 183 states and 248 transitions. [2020-10-13 04:39:35,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:39:35,241 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 81 [2020-10-13 04:39:35,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:35,243 INFO L225 Difference]: With dead ends: 183 [2020-10-13 04:39:35,243 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 04:39:35,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:39:35,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 04:39:35,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2020-10-13 04:39:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:39:35,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-10-13 04:39:35,248 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 81 [2020-10-13 04:39:35,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:35,248 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-10-13 04:39:35,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:39:35,248 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-10-13 04:39:35,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-13 04:39:35,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:35,249 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:35,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:39:35,250 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:35,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:35,250 INFO L82 PathProgramCache]: Analyzing trace with hash 2102517337, now seen corresponding path program 18 times [2020-10-13 04:39:35,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:35,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1255174927] [2020-10-13 04:39:35,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:35,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:35,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:35,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:40,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-13 04:39:40,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:40,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:39:40,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:40,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:39:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:40,272 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:39:40,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:40,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:40,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:40,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:40,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:40,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:40,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:39:40,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:40,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:40,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:40,456 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-13 04:39:40,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1255174927] [2020-10-13 04:39:40,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:40,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:39:40,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945573226] [2020-10-13 04:39:40,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:39:40,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:40,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:39:40,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:39:40,458 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 19 states. [2020-10-13 04:39:40,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:40,699 INFO L93 Difference]: Finished difference Result 193 states and 262 transitions. [2020-10-13 04:39:40,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:39:40,699 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 86 [2020-10-13 04:39:40,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:40,700 INFO L225 Difference]: With dead ends: 193 [2020-10-13 04:39:40,700 INFO L226 Difference]: Without dead ends: 120 [2020-10-13 04:39:40,701 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:39:40,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-13 04:39:40,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2020-10-13 04:39:40,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-13 04:39:40,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 150 transitions. [2020-10-13 04:39:40,706 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 150 transitions. Word has length 86 [2020-10-13 04:39:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:40,707 INFO L479 AbstractCegarLoop]: Abstraction has 116 states and 150 transitions. [2020-10-13 04:39:40,707 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:39:40,707 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 150 transitions. [2020-10-13 04:39:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:39:40,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:40,708 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:40,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:39:40,708 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:40,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:40,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1364290864, now seen corresponding path program 19 times [2020-10-13 04:39:40,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:40,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12905302] [2020-10-13 04:39:40,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:40,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:41,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:42,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:45,729 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:45,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:39:45,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:45,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 04:39:45,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:45,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:39:45,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:45,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:39:45,730 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:45,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:45,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:45,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:45,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:45,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:45,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:45,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:45,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:45,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:45,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:45,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:39:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 543 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-13 04:39:45,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12905302] [2020-10-13 04:39:45,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:45,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:39:45,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899118401] [2020-10-13 04:39:45,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:39:45,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:45,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:39:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:39:45,936 INFO L87 Difference]: Start difference. First operand 116 states and 150 transitions. Second operand 20 states. [2020-10-13 04:39:46,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:46,240 INFO L93 Difference]: Finished difference Result 203 states and 276 transitions. [2020-10-13 04:39:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:39:46,240 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 91 [2020-10-13 04:39:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:46,242 INFO L225 Difference]: With dead ends: 203 [2020-10-13 04:39:46,242 INFO L226 Difference]: Without dead ends: 126 [2020-10-13 04:39:46,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:39:46,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-13 04:39:46,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2020-10-13 04:39:46,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:39:46,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 158 transitions. [2020-10-13 04:39:46,247 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 158 transitions. Word has length 91 [2020-10-13 04:39:46,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:46,247 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 158 transitions. [2020-10-13 04:39:46,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:39:46,247 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 158 transitions. [2020-10-13 04:39:46,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-13 04:39:46,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:46,248 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:46,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:39:46,249 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:46,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:46,249 INFO L82 PathProgramCache]: Analyzing trace with hash 213994493, now seen corresponding path program 20 times [2020-10-13 04:39:46,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:46,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548020980] [2020-10-13 04:39:46,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:46,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:46,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:47,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:51,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-10-13 04:39:51,276 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:51,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 04:39:51,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:51,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:39:51,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:51,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:39:51,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:51,486 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:51,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:51,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:51,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:51,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:51,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:51,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:51,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:51,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:51,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:51,495 INFO L134 CoverageAnalysis]: Checked inductivity of 619 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-13 04:39:51,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548020980] [2020-10-13 04:39:51,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:51,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:39:51,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756320646] [2020-10-13 04:39:51,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:39:51,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:51,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:39:51,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:39:51,497 INFO L87 Difference]: Start difference. First operand 122 states and 158 transitions. Second operand 21 states. [2020-10-13 04:39:51,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:51,799 INFO L93 Difference]: Finished difference Result 213 states and 290 transitions. [2020-10-13 04:39:51,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:39:51,801 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 96 [2020-10-13 04:39:51,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:51,802 INFO L225 Difference]: With dead ends: 213 [2020-10-13 04:39:51,802 INFO L226 Difference]: Without dead ends: 132 [2020-10-13 04:39:51,804 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:39:51,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-13 04:39:51,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2020-10-13 04:39:51,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:39:51,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 166 transitions. [2020-10-13 04:39:51,809 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 166 transitions. Word has length 96 [2020-10-13 04:39:51,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:51,809 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 166 transitions. [2020-10-13 04:39:51,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:39:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 166 transitions. [2020-10-13 04:39:51,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-13 04:39:51,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:51,810 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:51,811 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:39:51,811 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:51,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:51,811 INFO L82 PathProgramCache]: Analyzing trace with hash -320400084, now seen corresponding path program 21 times [2020-10-13 04:39:51,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:51,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886355941] [2020-10-13 04:39:51,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:51,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:51,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:52,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:52,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:56,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:56,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-13 04:39:56,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:39:56,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:39:56,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:56,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:39:56,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:39:56,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:39:56,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:57,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:39:57,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:57,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:57,058 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:39:57,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:39:57,059 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:39:57,059 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:39:57,059 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:39:57,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:39:57,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:39:57,059 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:39:57,059 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:39:57,066 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-13 04:39:57,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886355941] [2020-10-13 04:39:57,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:39:57,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:39:57,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273354015] [2020-10-13 04:39:57,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:39:57,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:39:57,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:39:57,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:39:57,068 INFO L87 Difference]: Start difference. First operand 128 states and 166 transitions. Second operand 22 states. [2020-10-13 04:39:57,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:39:57,347 INFO L93 Difference]: Finished difference Result 223 states and 304 transitions. [2020-10-13 04:39:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:39:57,348 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 101 [2020-10-13 04:39:57,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:39:57,349 INFO L225 Difference]: With dead ends: 223 [2020-10-13 04:39:57,349 INFO L226 Difference]: Without dead ends: 138 [2020-10-13 04:39:57,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:39:57,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-13 04:39:57,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2020-10-13 04:39:57,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 04:39:57,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 174 transitions. [2020-10-13 04:39:57,361 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 174 transitions. Word has length 101 [2020-10-13 04:39:57,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:39:57,361 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 174 transitions. [2020-10-13 04:39:57,362 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:39:57,362 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 174 transitions. [2020-10-13 04:39:57,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2020-10-13 04:39:57,363 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:39:57,363 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:39:57,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:39:57,363 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:39:57,363 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:39:57,363 INFO L82 PathProgramCache]: Analyzing trace with hash 1191733665, now seen corresponding path program 22 times [2020-10-13 04:39:57,364 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:39:57,364 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512682091] [2020-10-13 04:39:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:39:57,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:39:57,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:39:58,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:02,388 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:02,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-13 04:40:02,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:02,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 04:40:02,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:02,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:40:02,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:02,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:40:02,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:02,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:02,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:02,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:02,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:02,658 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-13 04:40:02,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512682091] [2020-10-13 04:40:02,659 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:02,659 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:40:02,659 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651730271] [2020-10-13 04:40:02,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:40:02,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:02,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:40:02,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:40:02,661 INFO L87 Difference]: Start difference. First operand 134 states and 174 transitions. Second operand 23 states. [2020-10-13 04:40:02,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:02,989 INFO L93 Difference]: Finished difference Result 233 states and 318 transitions. [2020-10-13 04:40:02,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:40:02,989 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 106 [2020-10-13 04:40:02,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:02,991 INFO L225 Difference]: With dead ends: 233 [2020-10-13 04:40:02,991 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 04:40:02,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:40:02,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 04:40:02,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2020-10-13 04:40:02,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-13 04:40:02,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 182 transitions. [2020-10-13 04:40:03,000 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 182 transitions. Word has length 106 [2020-10-13 04:40:03,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:03,006 INFO L479 AbstractCegarLoop]: Abstraction has 140 states and 182 transitions. [2020-10-13 04:40:03,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:40:03,006 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 182 transitions. [2020-10-13 04:40:03,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-13 04:40:03,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:03,008 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:03,008 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:40:03,008 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:03,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:03,008 INFO L82 PathProgramCache]: Analyzing trace with hash -435632248, now seen corresponding path program 23 times [2020-10-13 04:40:03,009 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:03,009 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692501195] [2020-10-13 04:40:03,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:03,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:03,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:03,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:04,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:08,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:08,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-13 04:40:08,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:08,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5122 [2020-10-13 04:40:08,148 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:40:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:08,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:40:08,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:08,419 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:08,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:08,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:08,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:08,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:08,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:08,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:08,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:08,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:08,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:08,429 INFO L134 CoverageAnalysis]: Checked inductivity of 877 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-13 04:40:08,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692501195] [2020-10-13 04:40:08,430 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:08,430 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:40:08,430 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809916896] [2020-10-13 04:40:08,430 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:40:08,431 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:08,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:40:08,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:40:08,431 INFO L87 Difference]: Start difference. First operand 140 states and 182 transitions. Second operand 24 states. [2020-10-13 04:40:08,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:08,784 INFO L93 Difference]: Finished difference Result 243 states and 332 transitions. [2020-10-13 04:40:08,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:40:08,784 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 111 [2020-10-13 04:40:08,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:08,786 INFO L225 Difference]: With dead ends: 243 [2020-10-13 04:40:08,786 INFO L226 Difference]: Without dead ends: 150 [2020-10-13 04:40:08,787 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:40:08,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-13 04:40:08,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2020-10-13 04:40:08,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 04:40:08,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2020-10-13 04:40:08,793 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 111 [2020-10-13 04:40:08,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:08,794 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2020-10-13 04:40:08,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:40:08,794 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2020-10-13 04:40:08,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-13 04:40:08,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:08,795 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:08,795 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:40:08,795 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:08,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:08,796 INFO L82 PathProgramCache]: Analyzing trace with hash 784693061, now seen corresponding path program 24 times [2020-10-13 04:40:08,796 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:08,796 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [457033186] [2020-10-13 04:40:08,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:08,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:09,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:10,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:13,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:13,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 124 [2020-10-13 04:40:13,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:13,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:40:13,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:13,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:40:13,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:13,811 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:40:13,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:14,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:14,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:14,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:14,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:14,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:14,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:14,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:14,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:14,111 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:14,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 973 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-13 04:40:14,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [457033186] [2020-10-13 04:40:14,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:14,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:40:14,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520655835] [2020-10-13 04:40:14,119 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:40:14,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:14,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:40:14,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:40:14,120 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand 25 states. [2020-10-13 04:40:14,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:14,491 INFO L93 Difference]: Finished difference Result 253 states and 346 transitions. [2020-10-13 04:40:14,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:40:14,492 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 116 [2020-10-13 04:40:14,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:14,493 INFO L225 Difference]: With dead ends: 253 [2020-10-13 04:40:14,494 INFO L226 Difference]: Without dead ends: 156 [2020-10-13 04:40:14,495 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:40:14,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-13 04:40:14,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2020-10-13 04:40:14,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:40:14,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 198 transitions. [2020-10-13 04:40:14,501 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 198 transitions. Word has length 116 [2020-10-13 04:40:14,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:14,502 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 198 transitions. [2020-10-13 04:40:14,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:40:14,502 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 198 transitions. [2020-10-13 04:40:14,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:40:14,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:14,503 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:14,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:40:14,503 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:14,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash 380987876, now seen corresponding path program 25 times [2020-10-13 04:40:14,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:14,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498201688] [2020-10-13 04:40:14,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:14,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:15,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:16,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:19,533 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:40:19,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:19,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:40:19,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:40:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:19,534 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:40:19,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:19,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:19,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:19,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:19,861 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:19,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:19,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:19,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:19,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:19,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:19,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:19,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:19,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1074 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-13 04:40:19,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498201688] [2020-10-13 04:40:19,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:19,870 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:40:19,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751787252] [2020-10-13 04:40:19,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:40:19,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:40:19,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:40:19,871 INFO L87 Difference]: Start difference. First operand 152 states and 198 transitions. Second operand 26 states. [2020-10-13 04:40:20,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:20,207 INFO L93 Difference]: Finished difference Result 263 states and 360 transitions. [2020-10-13 04:40:20,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:40:20,207 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 121 [2020-10-13 04:40:20,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:20,209 INFO L225 Difference]: With dead ends: 263 [2020-10-13 04:40:20,209 INFO L226 Difference]: Without dead ends: 162 [2020-10-13 04:40:20,210 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:40:20,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-13 04:40:20,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2020-10-13 04:40:20,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 04:40:20,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 206 transitions. [2020-10-13 04:40:20,217 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 206 transitions. Word has length 121 [2020-10-13 04:40:20,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:20,217 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 206 transitions. [2020-10-13 04:40:20,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:40:20,217 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 206 transitions. [2020-10-13 04:40:20,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2020-10-13 04:40:20,218 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:20,218 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:20,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:40:20,219 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:20,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:20,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1860782871, now seen corresponding path program 26 times [2020-10-13 04:40:20,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:20,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2147054133] [2020-10-13 04:40:20,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:20,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:20,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:21,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:24,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:25,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:25,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 134 [2020-10-13 04:40:25,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:25,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:40:25,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:25,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:40:25,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:25,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-13 04:40:25,240 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:25,615 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:25,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:25,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:25,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:25,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:25,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:25,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:25,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:25,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:25,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-13 04:40:25,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2147054133] [2020-10-13 04:40:25,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:25,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:40:25,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884930304] [2020-10-13 04:40:25,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:40:25,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:25,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:40:25,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:40:25,632 INFO L87 Difference]: Start difference. First operand 158 states and 206 transitions. Second operand 27 states. [2020-10-13 04:40:26,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:26,021 INFO L93 Difference]: Finished difference Result 273 states and 374 transitions. [2020-10-13 04:40:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:40:26,021 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 126 [2020-10-13 04:40:26,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:26,023 INFO L225 Difference]: With dead ends: 273 [2020-10-13 04:40:26,023 INFO L226 Difference]: Without dead ends: 168 [2020-10-13 04:40:26,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:40:26,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-13 04:40:26,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2020-10-13 04:40:26,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-13 04:40:26,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 214 transitions. [2020-10-13 04:40:26,030 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 214 transitions. Word has length 126 [2020-10-13 04:40:26,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:26,031 INFO L479 AbstractCegarLoop]: Abstraction has 164 states and 214 transitions. [2020-10-13 04:40:26,031 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:40:26,031 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 214 transitions. [2020-10-13 04:40:26,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:40:26,032 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:26,032 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:26,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:40:26,032 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:26,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:26,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1626424256, now seen corresponding path program 27 times [2020-10-13 04:40:26,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:26,033 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [549247907] [2020-10-13 04:40:26,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:26,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:27,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:28,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:31,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:31,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:40:31,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:31,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:40:31,067 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:40:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:31,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-13 04:40:31,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:31,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:31,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:31,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:31,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:31,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:31,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:31,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:31,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:31,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:31,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:31,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:31,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:31,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1291 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-13 04:40:31,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [549247907] [2020-10-13 04:40:31,461 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:31,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:40:31,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844208680] [2020-10-13 04:40:31,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:40:31,462 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:31,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:40:31,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:40:31,463 INFO L87 Difference]: Start difference. First operand 164 states and 214 transitions. Second operand 28 states. [2020-10-13 04:40:31,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:31,877 INFO L93 Difference]: Finished difference Result 283 states and 388 transitions. [2020-10-13 04:40:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:40:31,878 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 131 [2020-10-13 04:40:31,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:31,879 INFO L225 Difference]: With dead ends: 283 [2020-10-13 04:40:31,879 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 04:40:31,880 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:40:31,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 04:40:31,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2020-10-13 04:40:31,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-13 04:40:31,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 222 transitions. [2020-10-13 04:40:31,890 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 222 transitions. Word has length 131 [2020-10-13 04:40:31,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:31,890 INFO L479 AbstractCegarLoop]: Abstraction has 170 states and 222 transitions. [2020-10-13 04:40:31,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:40:31,890 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 222 transitions. [2020-10-13 04:40:31,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-13 04:40:31,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:31,892 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:31,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:40:31,892 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:31,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:31,893 INFO L82 PathProgramCache]: Analyzing trace with hash 697983629, now seen corresponding path program 28 times [2020-10-13 04:40:31,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:31,894 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339683381] [2020-10-13 04:40:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:31,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:31,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:31,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:37,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:37,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-13 04:40:37,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:37,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-13 04:40:37,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:40:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:37,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-13 04:40:37,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:37,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:37,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:37,365 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:37,365 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:37,365 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:37,365 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:40:37,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:37,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:37,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:37,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:37,381 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-13 04:40:37,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339683381] [2020-10-13 04:40:37,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:37,385 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:40:37,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574059823] [2020-10-13 04:40:37,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:40:37,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:37,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:40:37,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:40:37,387 INFO L87 Difference]: Start difference. First operand 170 states and 222 transitions. Second operand 29 states. [2020-10-13 04:40:37,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:37,761 INFO L93 Difference]: Finished difference Result 293 states and 402 transitions. [2020-10-13 04:40:37,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:40:37,762 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 136 [2020-10-13 04:40:37,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:37,763 INFO L225 Difference]: With dead ends: 293 [2020-10-13 04:40:37,763 INFO L226 Difference]: Without dead ends: 180 [2020-10-13 04:40:37,765 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:40:37,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-13 04:40:37,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2020-10-13 04:40:37,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:40:37,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 230 transitions. [2020-10-13 04:40:37,773 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 230 transitions. Word has length 136 [2020-10-13 04:40:37,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:37,774 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 230 transitions. [2020-10-13 04:40:37,774 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:40:37,774 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 230 transitions. [2020-10-13 04:40:37,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 04:40:37,775 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:37,775 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:37,775 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:40:37,775 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:37,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:37,776 INFO L82 PathProgramCache]: Analyzing trace with hash 515276444, now seen corresponding path program 29 times [2020-10-13 04:40:37,776 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:37,776 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421962470] [2020-10-13 04:40:37,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:37,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:37,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:37,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:42,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:42,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 04:40:42,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:40:42,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 04:40:42,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:42,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:40:42,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:42,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-13 04:40:42,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:43,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:43,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:43,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:43,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:43,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:43,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:43,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:43,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:43,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:43,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:43,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:43,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1528 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-13 04:40:43,284 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421962470] [2020-10-13 04:40:43,285 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:43,285 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:40:43,285 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065555785] [2020-10-13 04:40:43,285 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:40:43,285 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:43,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:40:43,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:40:43,286 INFO L87 Difference]: Start difference. First operand 176 states and 230 transitions. Second operand 30 states. [2020-10-13 04:40:43,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:43,745 INFO L93 Difference]: Finished difference Result 303 states and 416 transitions. [2020-10-13 04:40:43,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:40:43,750 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 141 [2020-10-13 04:40:43,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:43,752 INFO L225 Difference]: With dead ends: 303 [2020-10-13 04:40:43,752 INFO L226 Difference]: Without dead ends: 186 [2020-10-13 04:40:43,753 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:40:43,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-13 04:40:43,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2020-10-13 04:40:43,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 04:40:43,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 238 transitions. [2020-10-13 04:40:43,759 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 238 transitions. Word has length 141 [2020-10-13 04:40:43,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:43,759 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 238 transitions. [2020-10-13 04:40:43,759 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:40:43,760 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 238 transitions. [2020-10-13 04:40:43,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2020-10-13 04:40:43,761 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:43,761 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:43,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:40:43,761 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:43,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:43,761 INFO L82 PathProgramCache]: Analyzing trace with hash -965820367, now seen corresponding path program 30 times [2020-10-13 04:40:43,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:43,762 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [783694275] [2020-10-13 04:40:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:43,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:43,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:45,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:46,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:48,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:48,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-13 04:40:48,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:48,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5086 [2020-10-13 04:40:48,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:40:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:48,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-13 04:40:48,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:49,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:49,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:49,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:49,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:49,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:49,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:49,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:49,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:49,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:49,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:49,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:49,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:49,385 INFO L134 CoverageAnalysis]: Checked inductivity of 1654 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-13 04:40:49,385 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [783694275] [2020-10-13 04:40:49,385 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:49,386 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:40:49,386 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910812403] [2020-10-13 04:40:49,386 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:40:49,386 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:49,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:40:49,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:40:49,387 INFO L87 Difference]: Start difference. First operand 182 states and 238 transitions. Second operand 31 states. [2020-10-13 04:40:49,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:49,930 INFO L93 Difference]: Finished difference Result 313 states and 430 transitions. [2020-10-13 04:40:49,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:40:49,931 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 146 [2020-10-13 04:40:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:49,935 INFO L225 Difference]: With dead ends: 313 [2020-10-13 04:40:49,935 INFO L226 Difference]: Without dead ends: 192 [2020-10-13 04:40:49,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:40:49,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-13 04:40:49,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2020-10-13 04:40:49,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 188 states. [2020-10-13 04:40:49,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 246 transitions. [2020-10-13 04:40:49,953 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 246 transitions. Word has length 146 [2020-10-13 04:40:49,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:49,954 INFO L479 AbstractCegarLoop]: Abstraction has 188 states and 246 transitions. [2020-10-13 04:40:49,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:40:49,954 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 246 transitions. [2020-10-13 04:40:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-13 04:40:49,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:49,956 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:49,956 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:40:49,957 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:49,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:49,957 INFO L82 PathProgramCache]: Analyzing trace with hash -1865518856, now seen corresponding path program 31 times [2020-10-13 04:40:49,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:49,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1182908795] [2020-10-13 04:40:49,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:50,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:50,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:51,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:53,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:55,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:55,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-13 04:40:55,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:40:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:40:55,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:40:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:40:55,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-13 04:40:55,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:55,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:40:55,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:55,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:55,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:40:55,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:40:55,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:40:55,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:40:55,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:40:55,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:40:55,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:40:55,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:40:55,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:40:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1785 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-13 04:40:55,541 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1182908795] [2020-10-13 04:40:55,541 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:40:55,541 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:40:55,541 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933209109] [2020-10-13 04:40:55,542 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:40:55,542 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:40:55,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:40:55,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:40:55,542 INFO L87 Difference]: Start difference. First operand 188 states and 246 transitions. Second operand 32 states. [2020-10-13 04:40:56,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:40:56,057 INFO L93 Difference]: Finished difference Result 323 states and 444 transitions. [2020-10-13 04:40:56,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:40:56,059 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 151 [2020-10-13 04:40:56,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:40:56,060 INFO L225 Difference]: With dead ends: 323 [2020-10-13 04:40:56,061 INFO L226 Difference]: Without dead ends: 198 [2020-10-13 04:40:56,062 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:40:56,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-13 04:40:56,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2020-10-13 04:40:56,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-13 04:40:56,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 254 transitions. [2020-10-13 04:40:56,068 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 254 transitions. Word has length 151 [2020-10-13 04:40:56,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:40:56,069 INFO L479 AbstractCegarLoop]: Abstraction has 194 states and 254 transitions. [2020-10-13 04:40:56,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:40:56,069 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 254 transitions. [2020-10-13 04:40:56,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2020-10-13 04:40:56,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:40:56,070 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:40:56,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:40:56,071 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:40:56,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:40:56,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1815219669, now seen corresponding path program 32 times [2020-10-13 04:40:56,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:40:56,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1997794627] [2020-10-13 04:40:56,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:40:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:40:56,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:40:57,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:01,149 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:01,150 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 164 [2020-10-13 04:41:01,150 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:01,150 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 04:41:01,150 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:01,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:41:01,150 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:01,151 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-13 04:41:01,151 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:01,682 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:01,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:01,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:01,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:01,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:01,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:01,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:01,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:01,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:01,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1921 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-13 04:41:01,698 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1997794627] [2020-10-13 04:41:01,698 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:01,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:41:01,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516254623] [2020-10-13 04:41:01,699 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:41:01,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:01,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:41:01,700 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:41:01,700 INFO L87 Difference]: Start difference. First operand 194 states and 254 transitions. Second operand 33 states. [2020-10-13 04:41:02,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:02,144 INFO L93 Difference]: Finished difference Result 333 states and 458 transitions. [2020-10-13 04:41:02,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:41:02,145 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 156 [2020-10-13 04:41:02,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:02,147 INFO L225 Difference]: With dead ends: 333 [2020-10-13 04:41:02,147 INFO L226 Difference]: Without dead ends: 204 [2020-10-13 04:41:02,148 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:41:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-13 04:41:02,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2020-10-13 04:41:02,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 04:41:02,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 262 transitions. [2020-10-13 04:41:02,156 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 262 transitions. Word has length 156 [2020-10-13 04:41:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:02,157 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 262 transitions. [2020-10-13 04:41:02,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:41:02,157 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 262 transitions. [2020-10-13 04:41:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-13 04:41:02,159 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:02,159 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:02,160 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:41:02,160 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:02,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:02,160 INFO L82 PathProgramCache]: Analyzing trace with hash 670585684, now seen corresponding path program 33 times [2020-10-13 04:41:02,161 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:02,161 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635751428] [2020-10-13 04:41:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:02,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:02,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:04,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:07,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:07,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:07,644 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-13 04:41:07,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:41:07,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5448 [2020-10-13 04:41:07,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:07,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:41:07,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:07,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-13 04:41:07,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:08,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:08,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:08,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:08,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:08,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:08,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:08,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:08,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:08,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:08,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:08,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 2062 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-13 04:41:08,211 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635751428] [2020-10-13 04:41:08,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:08,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:41:08,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954326368] [2020-10-13 04:41:08,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:41:08,212 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:08,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:41:08,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:41:08,213 INFO L87 Difference]: Start difference. First operand 200 states and 262 transitions. Second operand 34 states. [2020-10-13 04:41:08,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:08,736 INFO L93 Difference]: Finished difference Result 343 states and 472 transitions. [2020-10-13 04:41:08,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:41:08,736 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 161 [2020-10-13 04:41:08,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:08,738 INFO L225 Difference]: With dead ends: 343 [2020-10-13 04:41:08,738 INFO L226 Difference]: Without dead ends: 210 [2020-10-13 04:41:08,739 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:41:08,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-13 04:41:08,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2020-10-13 04:41:08,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-13 04:41:08,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 270 transitions. [2020-10-13 04:41:08,745 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 270 transitions. Word has length 161 [2020-10-13 04:41:08,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:08,745 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 270 transitions. [2020-10-13 04:41:08,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:41:08,745 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 270 transitions. [2020-10-13 04:41:08,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2020-10-13 04:41:08,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:08,746 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:08,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:41:08,747 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:08,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:08,747 INFO L82 PathProgramCache]: Analyzing trace with hash 2046987129, now seen corresponding path program 34 times [2020-10-13 04:41:08,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:08,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [626764909] [2020-10-13 04:41:08,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:08,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:08,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:11,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:13,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:13,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 174 [2020-10-13 04:41:13,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:13,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-13 04:41:13,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:13,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:41:13,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:13,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-13 04:41:13,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:14,413 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:14,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:14,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:14,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:14,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:14,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:14,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:14,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:14,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:14,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:14,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2208 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-13 04:41:14,436 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [626764909] [2020-10-13 04:41:14,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:14,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:41:14,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638217545] [2020-10-13 04:41:14,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:41:14,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:14,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:41:14,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:41:14,438 INFO L87 Difference]: Start difference. First operand 206 states and 270 transitions. Second operand 35 states. [2020-10-13 04:41:14,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:14,997 INFO L93 Difference]: Finished difference Result 353 states and 486 transitions. [2020-10-13 04:41:14,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:41:14,998 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 166 [2020-10-13 04:41:14,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:14,999 INFO L225 Difference]: With dead ends: 353 [2020-10-13 04:41:15,000 INFO L226 Difference]: Without dead ends: 216 [2020-10-13 04:41:15,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:41:15,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-13 04:41:15,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2020-10-13 04:41:15,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 04:41:15,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 278 transitions. [2020-10-13 04:41:15,008 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 278 transitions. Word has length 166 [2020-10-13 04:41:15,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:15,008 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 278 transitions. [2020-10-13 04:41:15,008 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:41:15,008 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 278 transitions. [2020-10-13 04:41:15,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 04:41:15,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:15,010 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:15,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:41:15,010 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:15,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:15,010 INFO L82 PathProgramCache]: Analyzing trace with hash 710272432, now seen corresponding path program 35 times [2020-10-13 04:41:15,010 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:15,011 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707027356] [2020-10-13 04:41:15,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:15,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:15,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:17,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:20,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:20,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 04:41:20,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:20,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5054 [2020-10-13 04:41:20,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:20,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:41:20,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:20,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-13 04:41:20,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:20,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:20,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:20,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:20,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:20,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:20,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:20,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:20,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:20,702 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:20,717 INFO L134 CoverageAnalysis]: Checked inductivity of 2359 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-13 04:41:20,717 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707027356] [2020-10-13 04:41:20,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:20,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:41:20,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833346577] [2020-10-13 04:41:20,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:41:20,719 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:20,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:41:20,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:41:20,720 INFO L87 Difference]: Start difference. First operand 212 states and 278 transitions. Second operand 36 states. [2020-10-13 04:41:21,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:21,275 INFO L93 Difference]: Finished difference Result 363 states and 500 transitions. [2020-10-13 04:41:21,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:41:21,276 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 171 [2020-10-13 04:41:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:21,277 INFO L225 Difference]: With dead ends: 363 [2020-10-13 04:41:21,278 INFO L226 Difference]: Without dead ends: 222 [2020-10-13 04:41:21,279 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:41:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-13 04:41:21,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2020-10-13 04:41:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-13 04:41:21,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 286 transitions. [2020-10-13 04:41:21,285 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 286 transitions. Word has length 171 [2020-10-13 04:41:21,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:21,286 INFO L479 AbstractCegarLoop]: Abstraction has 218 states and 286 transitions. [2020-10-13 04:41:21,286 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:41:21,286 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 286 transitions. [2020-10-13 04:41:21,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-13 04:41:21,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:21,287 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:21,287 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:41:21,287 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:21,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:21,288 INFO L82 PathProgramCache]: Analyzing trace with hash -847349475, now seen corresponding path program 36 times [2020-10-13 04:41:21,288 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:21,288 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650110452] [2020-10-13 04:41:21,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:21,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:21,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:24,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:26,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:26,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 184 [2020-10-13 04:41:26,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:26,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 04:41:26,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:26,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:41:26,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:26,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-13 04:41:26,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:27,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:27,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:27,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:27,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:27,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:27,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:27,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:27,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:27,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:27,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:27,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:27,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:27,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2515 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-13 04:41:27,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650110452] [2020-10-13 04:41:27,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:27,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:41:27,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039784011] [2020-10-13 04:41:27,031 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:41:27,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:27,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:41:27,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:41:27,032 INFO L87 Difference]: Start difference. First operand 218 states and 286 transitions. Second operand 37 states. [2020-10-13 04:41:27,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:27,602 INFO L93 Difference]: Finished difference Result 373 states and 514 transitions. [2020-10-13 04:41:27,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:41:27,603 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 176 [2020-10-13 04:41:27,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:27,605 INFO L225 Difference]: With dead ends: 373 [2020-10-13 04:41:27,605 INFO L226 Difference]: Without dead ends: 228 [2020-10-13 04:41:27,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:41:27,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-13 04:41:27,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2020-10-13 04:41:27,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2020-10-13 04:41:27,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 294 transitions. [2020-10-13 04:41:27,614 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 294 transitions. Word has length 176 [2020-10-13 04:41:27,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:27,615 INFO L479 AbstractCegarLoop]: Abstraction has 224 states and 294 transitions. [2020-10-13 04:41:27,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:41:27,615 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 294 transitions. [2020-10-13 04:41:27,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 04:41:27,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:27,616 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:27,616 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:41:27,617 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:27,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:27,617 INFO L82 PathProgramCache]: Analyzing trace with hash -846665716, now seen corresponding path program 37 times [2020-10-13 04:41:27,617 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:27,617 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1309725369] [2020-10-13 04:41:27,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:27,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:30,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:32,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:32,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 04:41:32,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:32,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 04:41:32,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:41:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:32,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-13 04:41:32,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:33,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:33,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:33,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:33,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:33,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:33,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:33,387 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:33,387 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:33,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:33,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:33,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:33,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:33,403 INFO L134 CoverageAnalysis]: Checked inductivity of 2676 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-13 04:41:33,403 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1309725369] [2020-10-13 04:41:33,404 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:33,404 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:41:33,404 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757058320] [2020-10-13 04:41:33,404 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:41:33,404 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:33,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:41:33,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:41:33,405 INFO L87 Difference]: Start difference. First operand 224 states and 294 transitions. Second operand 38 states. [2020-10-13 04:41:33,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:33,967 INFO L93 Difference]: Finished difference Result 383 states and 528 transitions. [2020-10-13 04:41:33,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:41:33,967 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 181 [2020-10-13 04:41:33,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:33,969 INFO L225 Difference]: With dead ends: 383 [2020-10-13 04:41:33,970 INFO L226 Difference]: Without dead ends: 234 [2020-10-13 04:41:33,971 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:41:33,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-13 04:41:33,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2020-10-13 04:41:33,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-13 04:41:33,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 302 transitions. [2020-10-13 04:41:33,978 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 302 transitions. Word has length 181 [2020-10-13 04:41:33,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:33,978 INFO L479 AbstractCegarLoop]: Abstraction has 230 states and 302 transitions. [2020-10-13 04:41:33,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:41:33,978 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 302 transitions. [2020-10-13 04:41:33,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2020-10-13 04:41:33,980 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:33,980 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:33,980 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:41:33,980 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:33,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:33,981 INFO L82 PathProgramCache]: Analyzing trace with hash -423356735, now seen corresponding path program 38 times [2020-10-13 04:41:33,981 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:33,981 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [574053445] [2020-10-13 04:41:33,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:34,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:34,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:37,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:39,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:39,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-13 04:41:39,112 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:39,112 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5103 [2020-10-13 04:41:39,112 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:41:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-13 04:41:39,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:39,839 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:39,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:39,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:39,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:39,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:39,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:39,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:39,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 2842 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-13 04:41:39,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [574053445] [2020-10-13 04:41:39,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:39,861 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:41:39,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177717314] [2020-10-13 04:41:39,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:41:39,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:39,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:41:39,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:41:39,862 INFO L87 Difference]: Start difference. First operand 230 states and 302 transitions. Second operand 39 states. [2020-10-13 04:41:40,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:40,490 INFO L93 Difference]: Finished difference Result 393 states and 542 transitions. [2020-10-13 04:41:40,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:41:40,490 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 186 [2020-10-13 04:41:40,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:40,492 INFO L225 Difference]: With dead ends: 393 [2020-10-13 04:41:40,492 INFO L226 Difference]: Without dead ends: 240 [2020-10-13 04:41:40,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:41:40,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-13 04:41:40,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 236. [2020-10-13 04:41:40,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 236 states. [2020-10-13 04:41:40,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 310 transitions. [2020-10-13 04:41:40,499 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 310 transitions. Word has length 186 [2020-10-13 04:41:40,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:40,499 INFO L479 AbstractCegarLoop]: Abstraction has 236 states and 310 transitions. [2020-10-13 04:41:40,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:41:40,499 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 310 transitions. [2020-10-13 04:41:40,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2020-10-13 04:41:40,500 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:40,501 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:40,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:41:40,501 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:40,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:40,501 INFO L82 PathProgramCache]: Analyzing trace with hash 313727592, now seen corresponding path program 39 times [2020-10-13 04:41:40,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:40,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687374636] [2020-10-13 04:41:40,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:40,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:40,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:44,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:45,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:45,614 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 199 [2020-10-13 04:41:45,614 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:45,614 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5088 [2020-10-13 04:41:45,614 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:45,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:41:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:45,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-13 04:41:45,615 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:46,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:46,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:46,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:46,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:46,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:46,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:46,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:46,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:46,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:46,410 INFO L134 CoverageAnalysis]: Checked inductivity of 3013 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-13 04:41:46,410 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687374636] [2020-10-13 04:41:46,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:46,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:41:46,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316215238] [2020-10-13 04:41:46,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:41:46,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:46,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:41:46,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:41:46,412 INFO L87 Difference]: Start difference. First operand 236 states and 310 transitions. Second operand 40 states. [2020-10-13 04:41:47,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:47,003 INFO L93 Difference]: Finished difference Result 403 states and 556 transitions. [2020-10-13 04:41:47,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:41:47,003 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 191 [2020-10-13 04:41:47,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:47,006 INFO L225 Difference]: With dead ends: 403 [2020-10-13 04:41:47,006 INFO L226 Difference]: Without dead ends: 246 [2020-10-13 04:41:47,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:41:47,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-13 04:41:47,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2020-10-13 04:41:47,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 242 states. [2020-10-13 04:41:47,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 318 transitions. [2020-10-13 04:41:47,014 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 318 transitions. Word has length 191 [2020-10-13 04:41:47,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:47,014 INFO L479 AbstractCegarLoop]: Abstraction has 242 states and 318 transitions. [2020-10-13 04:41:47,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:41:47,015 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 318 transitions. [2020-10-13 04:41:47,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2020-10-13 04:41:47,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:47,016 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:47,016 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:41:47,017 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:47,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:47,017 INFO L82 PathProgramCache]: Analyzing trace with hash 208774245, now seen corresponding path program 40 times [2020-10-13 04:41:47,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:47,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279818570] [2020-10-13 04:41:47,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:47,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:47,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:51,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:52,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:52,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 204 [2020-10-13 04:41:52,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:52,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 04:41:52,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:41:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:52,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-13 04:41:52,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:52,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:52,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:52,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:52,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:52,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:52,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:52,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:52,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:52,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:52,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:52,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:52,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3189 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-13 04:41:52,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279818570] [2020-10-13 04:41:52,923 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:52,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:41:52,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890757301] [2020-10-13 04:41:52,924 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:41:52,924 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:52,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:41:52,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:41:52,925 INFO L87 Difference]: Start difference. First operand 242 states and 318 transitions. Second operand 41 states. [2020-10-13 04:41:53,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:41:53,532 INFO L93 Difference]: Finished difference Result 413 states and 570 transitions. [2020-10-13 04:41:53,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:41:53,532 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 196 [2020-10-13 04:41:53,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:41:53,535 INFO L225 Difference]: With dead ends: 413 [2020-10-13 04:41:53,535 INFO L226 Difference]: Without dead ends: 252 [2020-10-13 04:41:53,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:41:53,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-13 04:41:53,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2020-10-13 04:41:53,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 248 states. [2020-10-13 04:41:53,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 326 transitions. [2020-10-13 04:41:53,543 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 326 transitions. Word has length 196 [2020-10-13 04:41:53,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:41:53,543 INFO L479 AbstractCegarLoop]: Abstraction has 248 states and 326 transitions. [2020-10-13 04:41:53,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:41:53,543 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 326 transitions. [2020-10-13 04:41:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 04:41:53,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:41:53,545 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:41:53,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:41:53,545 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:41:53,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:41:53,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1569309500, now seen corresponding path program 41 times [2020-10-13 04:41:53,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:41:53,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340450472] [2020-10-13 04:41:53,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:41:53,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:53,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:58,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:58,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:58,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 04:41:58,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:41:58,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-13 04:41:58,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:58,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:41:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:41:58,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-13 04:41:58,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:59,523 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:41:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:41:59,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:41:59,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:41:59,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:41:59,527 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:41:59,527 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:41:59,527 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:41:59,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:41:59,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:41:59,527 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:41:59,528 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:41:59,546 INFO L134 CoverageAnalysis]: Checked inductivity of 3370 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-13 04:41:59,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340450472] [2020-10-13 04:41:59,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:41:59,546 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:41:59,546 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535361135] [2020-10-13 04:41:59,546 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:41:59,547 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:41:59,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:41:59,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:41:59,548 INFO L87 Difference]: Start difference. First operand 248 states and 326 transitions. Second operand 42 states. [2020-10-13 04:42:00,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:00,247 INFO L93 Difference]: Finished difference Result 423 states and 584 transitions. [2020-10-13 04:42:00,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:42:00,248 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 201 [2020-10-13 04:42:00,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:00,250 INFO L225 Difference]: With dead ends: 423 [2020-10-13 04:42:00,250 INFO L226 Difference]: Without dead ends: 258 [2020-10-13 04:42:00,252 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:42:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-13 04:42:00,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2020-10-13 04:42:00,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 254 states. [2020-10-13 04:42:00,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 334 transitions. [2020-10-13 04:42:00,259 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 334 transitions. Word has length 201 [2020-10-13 04:42:00,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:00,259 INFO L479 AbstractCegarLoop]: Abstraction has 254 states and 334 transitions. [2020-10-13 04:42:00,259 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:42:00,259 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 334 transitions. [2020-10-13 04:42:00,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2020-10-13 04:42:00,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:00,261 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:00,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:42:00,261 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:00,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:00,261 INFO L82 PathProgramCache]: Analyzing trace with hash 1873109513, now seen corresponding path program 42 times [2020-10-13 04:42:00,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:00,262 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [461571906] [2020-10-13 04:42:00,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:00,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:05,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:05,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 214 [2020-10-13 04:42:05,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:05,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-13 04:42:05,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:05,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:42:05,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:05,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-13 04:42:05,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:06,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:06,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:06,243 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:06,243 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:06,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:06,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:06,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:06,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 3556 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-10-13 04:42:06,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [461571906] [2020-10-13 04:42:06,269 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:06,269 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:42:06,270 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307947020] [2020-10-13 04:42:06,270 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:42:06,270 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:06,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:42:06,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:42:06,271 INFO L87 Difference]: Start difference. First operand 254 states and 334 transitions. Second operand 43 states. [2020-10-13 04:42:06,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:06,898 INFO L93 Difference]: Finished difference Result 433 states and 598 transitions. [2020-10-13 04:42:06,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:42:06,899 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 206 [2020-10-13 04:42:06,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:06,901 INFO L225 Difference]: With dead ends: 433 [2020-10-13 04:42:06,901 INFO L226 Difference]: Without dead ends: 264 [2020-10-13 04:42:06,903 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:42:06,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-13 04:42:06,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2020-10-13 04:42:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-13 04:42:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 342 transitions. [2020-10-13 04:42:06,909 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 342 transitions. Word has length 206 [2020-10-13 04:42:06,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:06,910 INFO L479 AbstractCegarLoop]: Abstraction has 260 states and 342 transitions. [2020-10-13 04:42:06,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:42:06,910 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 342 transitions. [2020-10-13 04:42:06,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-13 04:42:06,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:06,911 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:06,912 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:42:06,912 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:06,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:06,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1460400352, now seen corresponding path program 43 times [2020-10-13 04:42:06,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:06,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [96836439] [2020-10-13 04:42:06,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:06,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:06,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:11,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:11,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 219 [2020-10-13 04:42:11,956 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:11,956 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:42:11,956 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:11,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:42:11,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:11,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-13 04:42:11,957 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:12,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:12,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:12,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:12,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:12,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:12,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:12,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:12,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:12,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:12,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:12,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:12,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3747 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-13 04:42:12,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [96836439] [2020-10-13 04:42:12,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:12,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:42:12,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339311145] [2020-10-13 04:42:12,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:42:12,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:12,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:42:12,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:42:12,912 INFO L87 Difference]: Start difference. First operand 260 states and 342 transitions. Second operand 44 states. [2020-10-13 04:42:13,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:13,556 INFO L93 Difference]: Finished difference Result 443 states and 612 transitions. [2020-10-13 04:42:13,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:42:13,557 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 211 [2020-10-13 04:42:13,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:13,559 INFO L225 Difference]: With dead ends: 443 [2020-10-13 04:42:13,559 INFO L226 Difference]: Without dead ends: 270 [2020-10-13 04:42:13,561 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:42:13,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-13 04:42:13,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2020-10-13 04:42:13,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 266 states. [2020-10-13 04:42:13,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 350 transitions. [2020-10-13 04:42:13,566 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 350 transitions. Word has length 211 [2020-10-13 04:42:13,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:13,566 INFO L479 AbstractCegarLoop]: Abstraction has 266 states and 350 transitions. [2020-10-13 04:42:13,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:42:13,566 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 350 transitions. [2020-10-13 04:42:13,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-13 04:42:13,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:13,567 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:13,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:42:13,568 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:13,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:13,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1342017453, now seen corresponding path program 44 times [2020-10-13 04:42:13,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:13,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1932897742] [2020-10-13 04:42:13,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:13,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:13,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:18,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:18,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 224 [2020-10-13 04:42:18,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:18,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-13 04:42:18,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:42:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-13 04:42:18,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:19,608 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:19,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:19,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:19,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:19,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:19,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:19,612 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:19,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:19,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:19,643 INFO L134 CoverageAnalysis]: Checked inductivity of 3943 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-10-13 04:42:19,646 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1932897742] [2020-10-13 04:42:19,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:19,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:42:19,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70658181] [2020-10-13 04:42:19,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:42:19,647 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:19,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:42:19,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:42:19,648 INFO L87 Difference]: Start difference. First operand 266 states and 350 transitions. Second operand 45 states. [2020-10-13 04:42:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:20,402 INFO L93 Difference]: Finished difference Result 453 states and 626 transitions. [2020-10-13 04:42:20,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:42:20,402 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 216 [2020-10-13 04:42:20,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:20,404 INFO L225 Difference]: With dead ends: 453 [2020-10-13 04:42:20,404 INFO L226 Difference]: Without dead ends: 276 [2020-10-13 04:42:20,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:42:20,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2020-10-13 04:42:20,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 272. [2020-10-13 04:42:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 272 states. [2020-10-13 04:42:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 358 transitions. [2020-10-13 04:42:20,411 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 358 transitions. Word has length 216 [2020-10-13 04:42:20,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:20,411 INFO L479 AbstractCegarLoop]: Abstraction has 272 states and 358 transitions. [2020-10-13 04:42:20,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:42:20,412 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 358 transitions. [2020-10-13 04:42:20,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-13 04:42:20,413 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:20,413 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:20,413 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:42:20,413 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:20,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:20,414 INFO L82 PathProgramCache]: Analyzing trace with hash -1311878788, now seen corresponding path program 45 times [2020-10-13 04:42:20,414 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:20,414 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830689008] [2020-10-13 04:42:20,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:20,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:20,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:25,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:25,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-13 04:42:25,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:25,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5181 [2020-10-13 04:42:25,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:25,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:42:25,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:25,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-13 04:42:25,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:26,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:26,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:26,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:26,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:26,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:26,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:26,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:26,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:26,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:26,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:26,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4144 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-13 04:42:26,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830689008] [2020-10-13 04:42:26,680 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:26,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:42:26,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767991123] [2020-10-13 04:42:26,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:42:26,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:26,681 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:42:26,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:42:26,682 INFO L87 Difference]: Start difference. First operand 272 states and 358 transitions. Second operand 46 states. [2020-10-13 04:42:27,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:27,368 INFO L93 Difference]: Finished difference Result 463 states and 640 transitions. [2020-10-13 04:42:27,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:42:27,369 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 221 [2020-10-13 04:42:27,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:27,371 INFO L225 Difference]: With dead ends: 463 [2020-10-13 04:42:27,371 INFO L226 Difference]: Without dead ends: 282 [2020-10-13 04:42:27,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:42:27,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-13 04:42:27,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 278. [2020-10-13 04:42:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-13 04:42:27,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 366 transitions. [2020-10-13 04:42:27,378 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 366 transitions. Word has length 221 [2020-10-13 04:42:27,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:27,379 INFO L479 AbstractCegarLoop]: Abstraction has 278 states and 366 transitions. [2020-10-13 04:42:27,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:42:27,379 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 366 transitions. [2020-10-13 04:42:27,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2020-10-13 04:42:27,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:27,380 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:27,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:42:27,381 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:27,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:27,381 INFO L82 PathProgramCache]: Analyzing trace with hash 530083153, now seen corresponding path program 46 times [2020-10-13 04:42:27,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:27,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305629335] [2020-10-13 04:42:27,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:27,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:27,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:32,528 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:32,528 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-13 04:42:32,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:42:32,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5124 [2020-10-13 04:42:32,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-13 04:42:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:42:32,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-13 04:42:32,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:33,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:42:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:42:33,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:42:33,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:42:33,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:42:33,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:42:33,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:42:33,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:42:33,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:42:33,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:42:33,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:42:33,600 INFO L134 CoverageAnalysis]: Checked inductivity of 4350 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 2501 trivial. 0 not checked. [2020-10-13 04:42:33,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305629335] [2020-10-13 04:42:33,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:42:33,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-13 04:42:33,601 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287650667] [2020-10-13 04:42:33,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-13 04:42:33,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:42:33,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-13 04:42:33,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:42:33,602 INFO L87 Difference]: Start difference. First operand 278 states and 366 transitions. Second operand 47 states. [2020-10-13 04:42:34,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:42:34,325 INFO L93 Difference]: Finished difference Result 473 states and 654 transitions. [2020-10-13 04:42:34,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-13 04:42:34,325 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 226 [2020-10-13 04:42:34,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:42:34,328 INFO L225 Difference]: With dead ends: 473 [2020-10-13 04:42:34,328 INFO L226 Difference]: Without dead ends: 288 [2020-10-13 04:42:34,329 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-13 04:42:34,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-13 04:42:34,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 284. [2020-10-13 04:42:34,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-13 04:42:34,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 374 transitions. [2020-10-13 04:42:34,336 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 374 transitions. Word has length 226 [2020-10-13 04:42:34,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:42:34,336 INFO L479 AbstractCegarLoop]: Abstraction has 284 states and 374 transitions. [2020-10-13 04:42:34,336 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-13 04:42:34,336 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 374 transitions. [2020-10-13 04:42:34,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2020-10-13 04:42:34,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:42:34,338 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:42:34,338 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-13 04:42:34,338 INFO L427 AbstractCegarLoop]: === Iteration 49 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:42:34,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:42:34,338 INFO L82 PathProgramCache]: Analyzing trace with hash -2077834280, now seen corresponding path program 47 times [2020-10-13 04:42:34,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:42:34,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1544321095] [2020-10-13 04:42:34,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:42:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:42:34,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking...