/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 SingleStatement --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=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:50:18,727 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:50:18,731 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:50:18,757 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:50:18,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:50:18,759 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:50:18,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:50:18,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:50:18,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:50:18,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:50:18,767 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:50:18,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:50:18,769 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:50:18,770 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:50:18,772 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:50:18,773 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:50:18,774 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:50:18,775 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:50:18,778 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:50:18,780 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:50:18,783 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:50:18,786 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:50:18,788 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:50:18,791 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:50:18,798 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:50:18,798 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:50:18,798 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:50:18,802 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:50:18,803 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:50:18,807 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:50:18,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:50:18,809 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:50:18,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:50:18,812 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:50:18,815 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:50:18,815 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:50:18,816 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:50:18,816 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:50:18,817 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:50:18,818 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:50:18,818 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:50:18,822 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 [2020-09-24 21:50:18,868 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:50:18,869 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:50:18,871 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:50:18,871 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:50:18,872 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:50:18,872 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:50:18,872 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:50:18,873 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:50:18,873 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:50:18,873 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:50:18,874 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:50:18,874 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:50:18,875 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:50:18,875 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:50:18,875 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:50:18,876 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:50:18,876 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:50:18,876 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:50:18,876 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:50:18,877 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:50:18,877 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:50:18,877 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:50:18,877 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:50:18,877 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:50:18,878 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:50:18,878 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:50:18,878 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:50:18,878 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:50:18,879 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:50:18,879 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 -> SingleStatement 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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=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=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:50:19,326 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:50:19,350 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:50:19,355 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:50:19,357 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:50:19,358 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:50:19,359 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-09-24 21:50:19,455 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80cba0c9b/221cecb1be624af2922e210071afea7c/FLAG9adf3af9c [2020-09-24 21:50:19,998 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:50:19,999 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-acceleration/const_1-1.c [2020-09-24 21:50:20,008 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80cba0c9b/221cecb1be624af2922e210071afea7c/FLAG9adf3af9c [2020-09-24 21:50:20,346 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/80cba0c9b/221cecb1be624af2922e210071afea7c [2020-09-24 21:50:20,360 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:50:20,365 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:50:20,366 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:20,366 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:50:20,371 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:50:20,372 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,376 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c31b5ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20, skipping insertion in model container [2020-09-24 21:50:20,377 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,386 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:50:20,410 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:50:20,625 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:20,631 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:50:20,649 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:50:20,665 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:50:20,665 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20 WrapperNode [2020-09-24 21:50:20,665 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:50:20,666 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:50:20,667 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:50:20,667 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:50:20,681 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,681 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,764 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,771 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,772 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (1/1) ... [2020-09-24 21:50:20,774 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:50:20,774 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:50:20,774 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:50:20,774 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:50:20,776 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (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 [2020-09-24 21:50:20,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:50:20,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:50:20,860 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:50:20,861 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:50:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:50:20,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:50:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:50:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:50:20,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:50:21,060 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:50:21,061 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:50:21,065 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:21 BoogieIcfgContainer [2020-09-24 21:50:21,065 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:50:21,066 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:50:21,066 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:50:21,070 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:50:21,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:50:20" (1/3) ... [2020-09-24 21:50:21,071 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9d4e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:21, skipping insertion in model container [2020-09-24 21:50:21,071 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:50:20" (2/3) ... [2020-09-24 21:50:21,072 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b9d4e04 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:50:21, skipping insertion in model container [2020-09-24 21:50:21,072 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:50:21" (3/3) ... [2020-09-24 21:50:21,074 INFO L109 eAbstractionObserver]: Analyzing ICFG const_1-1.c [2020-09-24 21:50:21,084 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:50:21,093 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:50:21,112 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:50:21,139 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:50:21,140 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:50:21,140 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:50:21,140 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:50:21,140 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:50:21,141 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:50:21,141 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:50:21,141 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:50:21,163 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-24 21:50:21,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 21:50:21,170 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:21,171 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:21,172 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:21,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:21,180 INFO L82 PathProgramCache]: Analyzing trace with hash 493765703, now seen corresponding path program 1 times [2020-09-24 21:50:21,190 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:21,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825522582] [2020-09-24 21:50:21,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:21,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:50:21,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:21,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 70 [2020-09-24 21:50:21,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-24 21:50:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:21,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:50:21,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:21,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:21,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:21,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:21,416 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-24 21:50:21,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:21,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:21,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:21,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:21,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:21,430 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825522582] [2020-09-24 21:50:21,432 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:21,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-24 21:50:21,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640323971] [2020-09-24 21:50:21,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-24 21:50:21,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:21,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-24 21:50:21,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 21:50:21,466 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 2 states. [2020-09-24 21:50:21,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:21,500 INFO L93 Difference]: Finished difference Result 33 states and 36 transitions. [2020-09-24 21:50:21,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-24 21:50:21,502 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-24 21:50:21,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:21,513 INFO L225 Difference]: With dead ends: 33 [2020-09-24 21:50:21,514 INFO L226 Difference]: Without dead ends: 16 [2020-09-24 21:50:21,518 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-24 21:50:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-09-24 21:50:21,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-09-24 21:50:21,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-24 21:50:21,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-24 21:50:21,561 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-24 21:50:21,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:21,562 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-24 21:50:21,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-24 21:50:21,562 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-24 21:50:21,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 21:50:21,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:21,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:21,564 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:50:21,564 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:21,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:21,565 INFO L82 PathProgramCache]: Analyzing trace with hash 486377535, now seen corresponding path program 1 times [2020-09-24 21:50:21,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:21,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1142681834] [2020-09-24 21:50:21,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:21,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:50:21,648 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:21,648 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 68 [2020-09-24 21:50:21,648 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:21,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:50:21,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:21,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:50:21,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:21,815 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 5 [2020-09-24 21:50:21,818 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:21,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:21,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:21,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:21,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-24 21:50:21,832 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:21,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:21,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:21,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:21,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 11 [2020-09-24 21:50:21,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:21,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1142681834] [2020-09-24 21:50:21,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:50:21,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:50:21,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905965420] [2020-09-24 21:50:21,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:50:21,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:21,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:50:21,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:21,854 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 3 states. [2020-09-24 21:50:21,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:21,896 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2020-09-24 21:50:21,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:50:21,897 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-24 21:50:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:21,899 INFO L225 Difference]: With dead ends: 25 [2020-09-24 21:50:21,899 INFO L226 Difference]: Without dead ends: 20 [2020-09-24 21:50:21,900 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:50:21,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2020-09-24 21:50:21,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2020-09-24 21:50:21,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-09-24 21:50:21,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-09-24 21:50:21,908 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 11 [2020-09-24 21:50:21,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:21,908 INFO L479 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-09-24 21:50:21,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:50:21,909 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-09-24 21:50:21,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-24 21:50:21,909 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:21,909 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:21,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:50:21,910 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:21,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:21,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1748013841, now seen corresponding path program 1 times [2020-09-24 21:50:21,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:21,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2134196267] [2020-09-24 21:50:21,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:21,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:21,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:22,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-24 21:50:22,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:22,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 432 [2020-09-24 21:50:22,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:22,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:50:22,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:22,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-24 21:50:22,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:22,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:22,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:22,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:22,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:22,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:50:22,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:22,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:50:22,512 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:22,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2134196267] [2020-09-24 21:50:22,512 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:22,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 21:50:22,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454325939] [2020-09-24 21:50:22,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:50:22,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:22,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:50:22,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:50:22,518 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 5 states. [2020-09-24 21:50:22,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:22,606 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-09-24 21:50:22,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:50:22,607 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-09-24 21:50:22,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:22,608 INFO L225 Difference]: With dead ends: 30 [2020-09-24 21:50:22,608 INFO L226 Difference]: Without dead ends: 25 [2020-09-24 21:50:22,609 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:50:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-09-24 21:50:22,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 22. [2020-09-24 21:50:22,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-24 21:50:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2020-09-24 21:50:22,616 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 16 [2020-09-24 21:50:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:22,616 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2020-09-24 21:50:22,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:50:22,617 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2020-09-24 21:50:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-24 21:50:22,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:22,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:22,618 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:50:22,619 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:22,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:22,619 INFO L82 PathProgramCache]: Analyzing trace with hash 1960900159, now seen corresponding path program 2 times [2020-09-24 21:50:22,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:22,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102647818] [2020-09-24 21:50:22,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:22,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:22,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:22,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-09-24 21:50:22,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:22,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 278 [2020-09-24 21:50:22,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:50:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-09-24 21:50:22,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:23,009 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:23,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:23,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:23,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:23,014 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:23,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:23,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:23,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:23,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:23,018 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:23,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102647818] [2020-09-24 21:50:23,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:23,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:50:23,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706842235] [2020-09-24 21:50:23,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:50:23,021 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:23,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:50:23,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:50:23,022 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand 7 states. [2020-09-24 21:50:23,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:23,133 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-24 21:50:23,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:50:23,134 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 21 [2020-09-24 21:50:23,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:23,135 INFO L225 Difference]: With dead ends: 35 [2020-09-24 21:50:23,135 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 21:50:23,136 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:50:23,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 21:50:23,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-09-24 21:50:23,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-24 21:50:23,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-09-24 21:50:23,142 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 21 [2020-09-24 21:50:23,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:23,143 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-09-24 21:50:23,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:50:23,143 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-09-24 21:50:23,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-24 21:50:23,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:23,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:23,145 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:50:23,145 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:23,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:23,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1793113839, now seen corresponding path program 3 times [2020-09-24 21:50:23,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:23,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717995345] [2020-09-24 21:50:23,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:23,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:23,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:23,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-24 21:50:23,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:23,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 332 [2020-09-24 21:50:23,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:23,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:50:23,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:23,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-09-24 21:50:23,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:23,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:23,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:23,625 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:23,625 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:23,625 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:23,625 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:23,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:23,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:23,626 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:23,626 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:23,630 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:23,630 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717995345] [2020-09-24 21:50:23,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:23,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:50:23,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281209984] [2020-09-24 21:50:23,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:50:23,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:23,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:50:23,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:50:23,632 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 9 states. [2020-09-24 21:50:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:23,819 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-09-24 21:50:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:50:23,820 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 26 [2020-09-24 21:50:23,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:23,821 INFO L225 Difference]: With dead ends: 40 [2020-09-24 21:50:23,821 INFO L226 Difference]: Without dead ends: 35 [2020-09-24 21:50:23,822 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:50:23,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-09-24 21:50:23,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-09-24 21:50:23,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 21:50:23,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 21:50:23,830 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 26 [2020-09-24 21:50:23,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:23,830 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 21:50:23,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:50:23,831 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 21:50:23,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:50:23,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:23,833 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:23,833 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:50:23,833 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:23,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:23,834 INFO L82 PathProgramCache]: Analyzing trace with hash -774708161, now seen corresponding path program 4 times [2020-09-24 21:50:23,834 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:23,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050456776] [2020-09-24 21:50:23,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:23,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:23,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:23,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:24,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 21:50:24,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:24,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-09-24 21:50:24,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:50:24,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:24,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 21:50:24,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:24,451 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:24,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:24,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:24,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:24,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:24,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:24,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:24,456 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:24,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:24,461 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050456776] [2020-09-24 21:50:24,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:24,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:50:24,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330622933] [2020-09-24 21:50:24,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:50:24,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:24,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:50:24,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:50:24,464 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 11 states. [2020-09-24 21:50:24,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:24,723 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2020-09-24 21:50:24,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:50:24,724 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 31 [2020-09-24 21:50:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:24,725 INFO L225 Difference]: With dead ends: 45 [2020-09-24 21:50:24,725 INFO L226 Difference]: Without dead ends: 40 [2020-09-24 21:50:24,726 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:50:24,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-09-24 21:50:24,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-09-24 21:50:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-24 21:50:24,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-09-24 21:50:24,732 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 31 [2020-09-24 21:50:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:24,733 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-09-24 21:50:24,733 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:50:24,733 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-09-24 21:50:24,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-24 21:50:24,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:24,734 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:24,735 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:50:24,735 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:24,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:24,735 INFO L82 PathProgramCache]: Analyzing trace with hash -1644982033, now seen corresponding path program 5 times [2020-09-24 21:50:24,735 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:24,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [259700300] [2020-09-24 21:50:24,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:24,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:24,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:25,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-09-24 21:50:25,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:25,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 598 [2020-09-24 21:50:25,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:25,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:50:25,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:25,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-09-24 21:50:25,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:25,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:25,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:25,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:25,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:25,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:25,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:25,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:25,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:25,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:25,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:25,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:25,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:25,646 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:25,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [259700300] [2020-09-24 21:50:25,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:25,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:50:25,648 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639781898] [2020-09-24 21:50:25,648 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:50:25,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:25,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:50:25,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:50:25,649 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 13 states. [2020-09-24 21:50:26,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:26,100 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-09-24 21:50:26,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:50:26,101 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 36 [2020-09-24 21:50:26,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:26,102 INFO L225 Difference]: With dead ends: 50 [2020-09-24 21:50:26,102 INFO L226 Difference]: Without dead ends: 45 [2020-09-24 21:50:26,103 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:50:26,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-09-24 21:50:26,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-09-24 21:50:26,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-24 21:50:26,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2020-09-24 21:50:26,109 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 36 [2020-09-24 21:50:26,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:26,109 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2020-09-24 21:50:26,110 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:50:26,110 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2020-09-24 21:50:26,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-09-24 21:50:26,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:26,111 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:26,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:50:26,111 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:26,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:26,112 INFO L82 PathProgramCache]: Analyzing trace with hash 330519103, now seen corresponding path program 6 times [2020-09-24 21:50:26,112 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:26,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922533167] [2020-09-24 21:50:26,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:26,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:26,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:26,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:26,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-09-24 21:50:26,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:26,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 808 [2020-09-24 21:50:26,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:26,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:50:26,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:26,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-24 21:50:26,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:27,196 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:27,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:27,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:27,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:27,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:27,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:27,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:27,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:27,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:27,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:27,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:27,208 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:27,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922533167] [2020-09-24 21:50:27,208 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:27,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:50:27,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312555345] [2020-09-24 21:50:27,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:50:27,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:27,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:50:27,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:50:27,211 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand 15 states. [2020-09-24 21:50:27,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:27,692 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-09-24 21:50:27,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:50:27,692 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-09-24 21:50:27,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:27,693 INFO L225 Difference]: With dead ends: 55 [2020-09-24 21:50:27,694 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 21:50:27,695 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:50:27,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 21:50:27,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-09-24 21:50:27,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-24 21:50:27,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-09-24 21:50:27,701 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 41 [2020-09-24 21:50:27,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:27,701 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-09-24 21:50:27,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:50:27,701 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-09-24 21:50:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-09-24 21:50:27,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:27,703 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:27,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:50:27,703 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:27,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1026024175, now seen corresponding path program 7 times [2020-09-24 21:50:27,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:27,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [20990006] [2020-09-24 21:50:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:27,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:27,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:27,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:28,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:28,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-09-24 21:50:28,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:28,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 900 [2020-09-24 21:50:28,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:50:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:28,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-09-24 21:50:28,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:28,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:28,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:28,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:28,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:28,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:28,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:28,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:28,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:28,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:28,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:28,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:28,927 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:28,928 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [20990006] [2020-09-24 21:50:28,928 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:28,928 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:50:28,929 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260252323] [2020-09-24 21:50:28,929 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:50:28,929 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:28,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:50:28,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:50:28,930 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 17 states. [2020-09-24 21:50:29,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:29,496 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-09-24 21:50:29,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:50:29,497 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 46 [2020-09-24 21:50:29,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:29,498 INFO L225 Difference]: With dead ends: 60 [2020-09-24 21:50:29,498 INFO L226 Difference]: Without dead ends: 55 [2020-09-24 21:50:29,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:50:29,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-24 21:50:29,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-09-24 21:50:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 21:50:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-24 21:50:29,506 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 46 [2020-09-24 21:50:29,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:29,506 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-24 21:50:29,506 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:50:29,506 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-24 21:50:29,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 21:50:29,507 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:29,508 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:29,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:50:29,508 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:29,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:29,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1033748417, now seen corresponding path program 8 times [2020-09-24 21:50:29,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:29,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801405180] [2020-09-24 21:50:29,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:29,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:29,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:29,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:30,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:30,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:50:30,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:30,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1171 [2020-09-24 21:50:30,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:30,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:50:30,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:30,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 21:50:30,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:31,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:31,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:31,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:31,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:31,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:31,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:31,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:31,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:31,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:31,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:31,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:31,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801405180] [2020-09-24 21:50:31,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:31,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:50:31,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834780182] [2020-09-24 21:50:31,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:50:31,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:31,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:50:31,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:50:31,202 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 19 states. [2020-09-24 21:50:31,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:31,895 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2020-09-24 21:50:31,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:50:31,896 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 51 [2020-09-24 21:50:31,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:31,897 INFO L225 Difference]: With dead ends: 65 [2020-09-24 21:50:31,897 INFO L226 Difference]: Without dead ends: 60 [2020-09-24 21:50:31,898 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:50:31,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-24 21:50:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-09-24 21:50:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-24 21:50:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-09-24 21:50:31,903 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 51 [2020-09-24 21:50:31,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:31,904 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-09-24 21:50:31,904 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:50:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-09-24 21:50:31,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-09-24 21:50:31,905 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:31,905 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:31,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:50:31,905 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:31,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:31,906 INFO L82 PathProgramCache]: Analyzing trace with hash -1398950673, now seen corresponding path program 9 times [2020-09-24 21:50:31,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:31,906 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413981557] [2020-09-24 21:50:31,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:31,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:32,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:33,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-09-24 21:50:33,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:33,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1442 [2020-09-24 21:50:33,365 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:33,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:50:33,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:33,366 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-09-24 21:50:33,366 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:33,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:33,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:33,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:33,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:33,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:33,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:33,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:33,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:33,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:33,761 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 189 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:33,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413981557] [2020-09-24 21:50:33,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:33,762 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:50:33,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783291414] [2020-09-24 21:50:33,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:50:33,763 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:33,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:50:33,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:50:33,764 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 21 states. [2020-09-24 21:50:34,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:34,506 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-09-24 21:50:34,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 21:50:34,507 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 56 [2020-09-24 21:50:34,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:34,508 INFO L225 Difference]: With dead ends: 70 [2020-09-24 21:50:34,509 INFO L226 Difference]: Without dead ends: 65 [2020-09-24 21:50:34,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=138, Invalid=1344, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 21:50:34,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-24 21:50:34,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-09-24 21:50:34,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-24 21:50:34,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2020-09-24 21:50:34,516 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 56 [2020-09-24 21:50:34,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:34,517 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2020-09-24 21:50:34,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:50:34,517 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2020-09-24 21:50:34,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-09-24 21:50:34,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:34,518 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:34,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:50:34,519 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:34,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:34,519 INFO L82 PathProgramCache]: Analyzing trace with hash 230665791, now seen corresponding path program 10 times [2020-09-24 21:50:34,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:34,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371076063] [2020-09-24 21:50:34,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:34,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:34,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:34,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:36,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:36,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-09-24 21:50:36,097 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:36,097 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1560 [2020-09-24 21:50:36,097 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:50:36,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:36,098 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-09-24 21:50:36,098 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:36,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:36,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:36,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:36,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:36,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:36,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:36,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:36,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:36,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:36,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:36,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:36,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:36,546 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 235 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:36,546 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371076063] [2020-09-24 21:50:36,546 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:36,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:50:36,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449246861] [2020-09-24 21:50:36,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:50:36,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:36,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:50:36,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=453, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:50:36,550 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand 23 states. [2020-09-24 21:50:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:37,730 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-09-24 21:50:37,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 21:50:37,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 61 [2020-09-24 21:50:37,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:37,731 INFO L225 Difference]: With dead ends: 75 [2020-09-24 21:50:37,731 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 21:50:37,733 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 21:50:37,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 21:50:37,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-09-24 21:50:37,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-24 21:50:37,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-09-24 21:50:37,741 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 61 [2020-09-24 21:50:37,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:37,742 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-09-24 21:50:37,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:50:37,742 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-09-24 21:50:37,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-09-24 21:50:37,743 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:37,743 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:37,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:50:37,744 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:37,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:37,744 INFO L82 PathProgramCache]: Analyzing trace with hash -1468725521, now seen corresponding path program 11 times [2020-09-24 21:50:37,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:37,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516759842] [2020-09-24 21:50:37,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:37,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:37,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:39,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:39,685 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-09-24 21:50:39,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:39,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1923 [2020-09-24 21:50:39,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:39,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:50:39,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:39,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-24 21:50:39,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:50:40,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:40,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:40,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:40,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:40,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:40,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:40,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:40,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:40,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:40,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:40,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:40,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:40,353 INFO L134 CoverageAnalysis]: Checked inductivity of 286 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:40,354 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516759842] [2020-09-24 21:50:40,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:40,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 21:50:40,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600778661] [2020-09-24 21:50:40,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 21:50:40,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:40,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 21:50:40,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:50:40,358 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 25 states. [2020-09-24 21:50:41,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:41,515 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-09-24 21:50:41,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:50:41,515 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 66 [2020-09-24 21:50:41,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:41,516 INFO L225 Difference]: With dead ends: 80 [2020-09-24 21:50:41,516 INFO L226 Difference]: Without dead ends: 75 [2020-09-24 21:50:41,519 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:50:41,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-24 21:50:41,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-24 21:50:41,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 21:50:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-24 21:50:41,535 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 66 [2020-09-24 21:50:41,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:41,536 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-24 21:50:41,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 21:50:41,536 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-24 21:50:41,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 21:50:41,537 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:41,537 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:41,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:50:41,541 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash -844391361, now seen corresponding path program 12 times [2020-09-24 21:50:41,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:41,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1727928722] [2020-09-24 21:50:41,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:41,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:41,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:42,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:44,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:44,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 21:50:44,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:44,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2470 [2020-09-24 21:50:44,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:44,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 21:50:44,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:44,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:50:44,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:44,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:44,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:44,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:44,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:44,575 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:44,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:44,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:44,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:44,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:44,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:44,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:44,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:44,587 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:44,588 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1727928722] [2020-09-24 21:50:44,588 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:44,588 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 21:50:44,588 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687475696] [2020-09-24 21:50:44,589 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 21:50:44,590 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:44,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 21:50:44,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=639, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:50:44,591 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 27 states. [2020-09-24 21:50:46,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:46,099 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2020-09-24 21:50:46,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 21:50:46,099 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 71 [2020-09-24 21:50:46,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:46,101 INFO L225 Difference]: With dead ends: 85 [2020-09-24 21:50:46,101 INFO L226 Difference]: Without dead ends: 80 [2020-09-24 21:50:46,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=183, Invalid=2367, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:50:46,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-24 21:50:46,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-09-24 21:50:46,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-24 21:50:46,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2020-09-24 21:50:46,116 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 71 [2020-09-24 21:50:46,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:46,117 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2020-09-24 21:50:46,117 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 21:50:46,117 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2020-09-24 21:50:46,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-09-24 21:50:46,118 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:46,118 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:46,119 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 21:50:46,122 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:46,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:46,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1154341103, now seen corresponding path program 13 times [2020-09-24 21:50:46,123 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:46,123 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668557038] [2020-09-24 21:50:46,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:46,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:46,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:46,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:48,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:48,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-09-24 21:50:48,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:48,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2338 [2020-09-24 21:50:48,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:48,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 21:50:48,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:48,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-09-24 21:50:48,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:49,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:49,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:49,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:49,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:49,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:49,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:49,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:50:49,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:49,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:49,244 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:49,255 INFO L134 CoverageAnalysis]: Checked inductivity of 403 backedges. 0 proven. 403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:49,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668557038] [2020-09-24 21:50:49,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:49,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 21:50:49,256 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [469734974] [2020-09-24 21:50:49,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 21:50:49,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:49,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 21:50:49,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=744, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:50:49,258 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand 29 states. [2020-09-24 21:50:50,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:50,956 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-09-24 21:50:50,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:50:50,957 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 76 [2020-09-24 21:50:50,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:50,959 INFO L225 Difference]: With dead ends: 90 [2020-09-24 21:50:50,959 INFO L226 Difference]: Without dead ends: 85 [2020-09-24 21:50:50,961 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=198, Invalid=2772, Unknown=0, NotChecked=0, Total=2970 [2020-09-24 21:50:50,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-24 21:50:50,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-09-24 21:50:50,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-24 21:50:50,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2020-09-24 21:50:50,976 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 76 [2020-09-24 21:50:50,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:50,980 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2020-09-24 21:50:50,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 21:50:50,980 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2020-09-24 21:50:50,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-24 21:50:50,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:50,981 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:50,981 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 21:50:50,982 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:50,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:50,982 INFO L82 PathProgramCache]: Analyzing trace with hash -2113533377, now seen corresponding path program 14 times [2020-09-24 21:50:50,982 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:50,982 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821129861] [2020-09-24 21:50:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:51,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:51,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:53,464 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:53,464 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-09-24 21:50:53,464 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:53,465 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2457 [2020-09-24 21:50:53,465 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:53,465 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 21:50:53,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:53,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-09-24 21:50:53,466 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:50:54,261 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:50:54,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:54,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:54,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:54,265 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:50:54,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:50:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:50:54,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:50:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:50:54,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:50:54,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:50:54,275 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 0 proven. 469 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:50:54,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821129861] [2020-09-24 21:50:54,276 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:50:54,276 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-24 21:50:54,277 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014553532] [2020-09-24 21:50:54,277 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-24 21:50:54,277 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:50:54,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-24 21:50:54,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=857, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:50:54,278 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand 31 states. [2020-09-24 21:50:56,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:50:56,183 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-09-24 21:50:56,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-24 21:50:56,183 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 81 [2020-09-24 21:50:56,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:50:56,184 INFO L225 Difference]: With dead ends: 95 [2020-09-24 21:50:56,185 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 21:50:56,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=213, Invalid=3209, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 21:50:56,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 21:50:56,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-09-24 21:50:56,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-24 21:50:56,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-09-24 21:50:56,191 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 81 [2020-09-24 21:50:56,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:50:56,191 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-09-24 21:50:56,192 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-24 21:50:56,192 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-09-24 21:50:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-09-24 21:50:56,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:50:56,193 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:50:56,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 21:50:56,193 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:50:56,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:50:56,194 INFO L82 PathProgramCache]: Analyzing trace with hash -305648913, now seen corresponding path program 15 times [2020-09-24 21:50:56,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:50:56,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892978558] [2020-09-24 21:50:56,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:50:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:50:56,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:56,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:50:59,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:50:59,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-09-24 21:50:59,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:50:59,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2807 [2020-09-24 21:50:59,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:50:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 21:50:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:50:59,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-24 21:50:59,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:00,012 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:00,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:00,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:00,015 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:00,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:00,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:00,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:00,016 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:00,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:00,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:00,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:00,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:00,027 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 0 proven. 540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:00,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892978558] [2020-09-24 21:51:00,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:00,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 21:51:00,028 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609476878] [2020-09-24 21:51:00,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 21:51:00,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:00,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 21:51:00,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=978, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:51:00,030 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 33 states. [2020-09-24 21:51:02,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:02,289 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2020-09-24 21:51:02,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 21:51:02,290 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 86 [2020-09-24 21:51:02,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:02,291 INFO L225 Difference]: With dead ends: 100 [2020-09-24 21:51:02,291 INFO L226 Difference]: Without dead ends: 95 [2020-09-24 21:51:02,293 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=228, Invalid=3678, Unknown=0, NotChecked=0, Total=3906 [2020-09-24 21:51:02,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-24 21:51:02,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-09-24 21:51:02,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 21:51:02,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-09-24 21:51:02,297 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 86 [2020-09-24 21:51:02,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:02,298 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-09-24 21:51:02,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 21:51:02,298 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-09-24 21:51:02,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 21:51:02,299 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:02,299 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:02,299 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 21:51:02,299 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:02,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:02,300 INFO L82 PathProgramCache]: Analyzing trace with hash 1387198527, now seen corresponding path program 16 times [2020-09-24 21:51:02,300 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:02,300 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631024519] [2020-09-24 21:51:02,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:02,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:02,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:03,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:05,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:05,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-24 21:51:05,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:51:05,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2844 [2020-09-24 21:51:05,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 21:51:05,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:51:05,159 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 21:51:05,159 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:06,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:51:06,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:06,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:06,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:51:06,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:51:06,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:51:06,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:51:06,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:51:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:51:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:51:06,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:51:06,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:51:06,174 INFO L134 CoverageAnalysis]: Checked inductivity of 616 backedges. 0 proven. 616 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:51:06,174 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631024519] [2020-09-24 21:51:06,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:51:06,177 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 21:51:06,177 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228563426] [2020-09-24 21:51:06,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 21:51:06,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:51:06,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 21:51:06,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1107, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:51:06,179 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 35 states. [2020-09-24 21:51:08,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:51:08,643 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2020-09-24 21:51:08,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 21:51:08,644 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 91 [2020-09-24 21:51:08,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:51:08,645 INFO L225 Difference]: With dead ends: 105 [2020-09-24 21:51:08,645 INFO L226 Difference]: Without dead ends: 100 [2020-09-24 21:51:08,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=243, Invalid=4179, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 21:51:08,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-24 21:51:08,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-09-24 21:51:08,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-09-24 21:51:08,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2020-09-24 21:51:08,652 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 91 [2020-09-24 21:51:08,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:51:08,652 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2020-09-24 21:51:08,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 21:51:08,653 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2020-09-24 21:51:08,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-09-24 21:51:08,653 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:51:08,654 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:51:08,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 21:51:08,654 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:51:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:51:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash 1736703215, now seen corresponding path program 17 times [2020-09-24 21:51:08,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:51:08,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [994452017] [2020-09-24 21:51:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:51:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:51:08,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:51:08,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking...