/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:29:22,743 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:29:22,746 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:29:22,787 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:29:22,788 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:29:22,789 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:29:22,791 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:29:22,794 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:29:22,797 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:29:22,798 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:29:22,800 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:29:22,802 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:29:22,802 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:29:22,804 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:29:22,805 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:29:22,807 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:29:22,808 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:29:22,810 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:29:22,812 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:29:22,815 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:29:22,817 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:29:22,823 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:29:22,825 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:29:22,826 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:29:22,858 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:29:22,858 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:29:22,859 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:29:22,862 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:29:22,870 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:29:22,872 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:29:22,872 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:29:22,877 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:29:22,878 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:29:22,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:29:22,888 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:29:22,888 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:29:22,889 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:29:22,890 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:29:22,890 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:29:22,892 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:29:22,893 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:29:22,894 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:29:22,921 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:29:22,921 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:29:22,922 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:29:22,923 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:29:22,923 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:29:22,923 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:29:22,923 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:29:22,924 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:29:22,924 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:29:22,924 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:29:22,924 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:29:22,924 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:29:22,924 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:29:22,925 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:29:22,925 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:29:22,925 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:29:22,925 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:29:22,926 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:29:22,926 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:29:22,926 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:29:22,926 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:29:22,926 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:22,927 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:29:22,927 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:29:22,927 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:29:22,927 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:29:22,927 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:29:22,927 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:29:22,928 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:29:22,928 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:29:23,307 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:29:23,342 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:29:23,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:29:23,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:29:23,350 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:29:23,351 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2020-10-26 19:29:23,444 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6faed5ac3/7ace8c324cf245b88358b459f8b6a29f/FLAGc5cde2490 [2020-10-26 19:29:24,157 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:29:24,158 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_partition_original_ground.i [2020-10-26 19:29:24,167 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6faed5ac3/7ace8c324cf245b88358b459f8b6a29f/FLAGc5cde2490 [2020-10-26 19:29:24,480 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6faed5ac3/7ace8c324cf245b88358b459f8b6a29f [2020-10-26 19:29:24,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:29:24,506 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:29:24,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:24,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:29:24,518 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:29:24,519 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7ae908ac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24, skipping insertion in model container [2020-10-26 19:29:24,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:29:24,558 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:29:24,741 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:24,750 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:29:24,775 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:24,793 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:29:24,793 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24 WrapperNode [2020-10-26 19:29:24,794 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:24,795 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:29:24,795 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:29:24,796 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:29:24,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,810 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,820 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,820 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (1/1) ... [2020-10-26 19:29:24,857 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:29:24,859 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:29:24,859 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:29:24,859 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:29:24,860 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:24,967 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:29:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:29:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:29:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:29:24,968 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:29:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:29:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:29:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:29:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:29:24,969 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:29:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:29:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:29:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:29:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:29:24,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:29:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:29:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:29:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:29:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:29:24,971 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:29:25,312 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:29:25,312 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-26 19:29:25,314 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:25 BoogieIcfgContainer [2020-10-26 19:29:25,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:29:25,317 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:29:25,317 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:29:25,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:29:25,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:29:24" (1/3) ... [2020-10-26 19:29:25,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463590d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:25, skipping insertion in model container [2020-10-26 19:29:25,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:24" (2/3) ... [2020-10-26 19:29:25,323 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@463590d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:25, skipping insertion in model container [2020-10-26 19:29:25,323 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:25" (3/3) ... [2020-10-26 19:29:25,325 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_partition_original_ground.i [2020-10-26 19:29:25,338 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:29:25,344 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:29:25,360 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:29:25,407 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:29:25,407 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:29:25,408 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:29:25,408 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:29:25,408 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:29:25,408 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:29:25,408 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:29:25,408 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:29:25,428 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states. [2020-10-26 19:29:25,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-26 19:29:25,435 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:25,436 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:25,436 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:25,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:25,443 INFO L82 PathProgramCache]: Analyzing trace with hash 30659017, now seen corresponding path program 1 times [2020-10-26 19:29:25,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:25,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240061713] [2020-10-26 19:29:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:25,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:26,196 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-26 19:29:26,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:26,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 590 [2020-10-26 19:29:26,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:26,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:26,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:29:26,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:29:26,364 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:26,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:26,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:26,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:26,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:26,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:29:26,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:26,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:26,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:26,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:26,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:26,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240061713] [2020-10-26 19:29:26,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:26,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:29:26,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022722553] [2020-10-26 19:29:26,407 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:26,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:26,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:26,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:26,427 INFO L87 Difference]: Start difference. First operand 37 states. Second operand 5 states. [2020-10-26 19:29:26,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:26,604 INFO L93 Difference]: Finished difference Result 83 states and 119 transitions. [2020-10-26 19:29:26,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:26,606 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-26 19:29:26,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:26,617 INFO L225 Difference]: With dead ends: 83 [2020-10-26 19:29:26,617 INFO L226 Difference]: Without dead ends: 43 [2020-10-26 19:29:26,621 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:26,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-26 19:29:26,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-26 19:29:26,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-26 19:29:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2020-10-26 19:29:26,675 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 16 [2020-10-26 19:29:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:26,676 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2020-10-26 19:29:26,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2020-10-26 19:29:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-26 19:29:26,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:26,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:26,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:29:26,679 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:26,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:26,680 INFO L82 PathProgramCache]: Analyzing trace with hash 1248111336, now seen corresponding path program 1 times [2020-10-26 19:29:26,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:26,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1357386980] [2020-10-26 19:29:26,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:26,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:26,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-26 19:29:26,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:26,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 167 [2020-10-26 19:29:26,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:26,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:26,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:26,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:29:26,867 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:26,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:26,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:26,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:26,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:26,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:26,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:29:26,977 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:26,977 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:26,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:26,978 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:26,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:26,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1357386980] [2020-10-26 19:29:26,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:26,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:29:26,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452225119] [2020-10-26 19:29:26,997 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:26,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:27,000 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:27,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:27,002 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand 5 states. [2020-10-26 19:29:27,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:27,161 INFO L93 Difference]: Finished difference Result 60 states and 73 transitions. [2020-10-26 19:29:27,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:27,162 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 18 [2020-10-26 19:29:27,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:27,164 INFO L225 Difference]: With dead ends: 60 [2020-10-26 19:29:27,164 INFO L226 Difference]: Without dead ends: 44 [2020-10-26 19:29:27,165 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:27,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-26 19:29:27,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2020-10-26 19:29:27,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-26 19:29:27,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-26 19:29:27,178 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 18 [2020-10-26 19:29:27,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:27,178 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-26 19:29:27,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:27,178 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-26 19:29:27,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-26 19:29:27,180 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:27,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:27,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:29:27,180 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash 1370893134, now seen corresponding path program 1 times [2020-10-26 19:29:27,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:27,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865088899] [2020-10-26 19:29:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:27,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:27,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-26 19:29:27,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:27,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 648 [2020-10-26 19:29:27,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:27,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:27,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:29:27,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:27,914 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:27,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:27,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:27,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:27,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:27,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:27,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:27,924 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:27,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:27,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:27,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:27,925 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:27,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:27,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865088899] [2020-10-26 19:29:27,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:27,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:29:27,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112989288] [2020-10-26 19:29:27,930 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:27,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:27,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:27,932 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 5 states. [2020-10-26 19:29:28,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:28,039 INFO L93 Difference]: Finished difference Result 73 states and 89 transitions. [2020-10-26 19:29:28,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:28,039 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 19 [2020-10-26 19:29:28,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:28,041 INFO L225 Difference]: With dead ends: 73 [2020-10-26 19:29:28,041 INFO L226 Difference]: Without dead ends: 53 [2020-10-26 19:29:28,042 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:28,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-26 19:29:28,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-10-26 19:29:28,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:29:28,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-26 19:29:28,052 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 19 [2020-10-26 19:29:28,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:28,052 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-26 19:29:28,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:28,052 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-26 19:29:28,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:29:28,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:28,054 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:28,054 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:29:28,054 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:28,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1928980932, now seen corresponding path program 2 times [2020-10-26 19:29:28,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:28,055 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53619772] [2020-10-26 19:29:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:28,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:28,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,701 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:28,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:29:28,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:28,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 633 [2020-10-26 19:29:28,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:29:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:28,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:29:28,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:28,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:28,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:28,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:28,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:28,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:28,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:28,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:28,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:28,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:28,780 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53619772] [2020-10-26 19:29:28,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:28,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:29:28,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132161087] [2020-10-26 19:29:28,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:29:28,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:28,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:29:28,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:28,786 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 6 states. [2020-10-26 19:29:28,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:28,936 INFO L93 Difference]: Finished difference Result 87 states and 109 transitions. [2020-10-26 19:29:28,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:29:28,937 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-26 19:29:28,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:28,938 INFO L225 Difference]: With dead ends: 87 [2020-10-26 19:29:28,938 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:29:28,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:28,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:29:28,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-26 19:29:28,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-26 19:29:28,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2020-10-26 19:29:28,950 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 22 [2020-10-26 19:29:28,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:28,950 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2020-10-26 19:29:28,950 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:29:28,951 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2020-10-26 19:29:28,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:29:28,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:28,953 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:28,953 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:29:28,954 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:28,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:28,954 INFO L82 PathProgramCache]: Analyzing trace with hash 2104168334, now seen corresponding path program 3 times [2020-10-26 19:29:28,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:28,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [466195704] [2020-10-26 19:29:28,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:28,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:28,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:28,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:29,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:29,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:29:29,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:29,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 837 [2020-10-26 19:29:29,811 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:29,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:29:29,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:29,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:29:29,812 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:30,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:30,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:30,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:30,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:29:30,039 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:30,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:30,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:30,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:30,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:30,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [466195704] [2020-10-26 19:29:30,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:30,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:29:30,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594639889] [2020-10-26 19:29:30,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:29:30,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:30,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:29:30,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:30,063 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand 12 states. [2020-10-26 19:29:30,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:30,477 INFO L93 Difference]: Finished difference Result 97 states and 119 transitions. [2020-10-26 19:29:30,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:29:30,478 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-26 19:29:30,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:30,479 INFO L225 Difference]: With dead ends: 97 [2020-10-26 19:29:30,480 INFO L226 Difference]: Without dead ends: 93 [2020-10-26 19:29:30,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:29:30,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-26 19:29:30,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2020-10-26 19:29:30,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-26 19:29:30,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 87 transitions. [2020-10-26 19:29:30,494 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 87 transitions. Word has length 25 [2020-10-26 19:29:30,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:30,495 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 87 transitions. [2020-10-26 19:29:30,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:29:30,495 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 87 transitions. [2020-10-26 19:29:30,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:29:30,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:30,496 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:30,496 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:29:30,497 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:30,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:30,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1489734384, now seen corresponding path program 1 times [2020-10-26 19:29:30,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:30,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65606875] [2020-10-26 19:29:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:30,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:31,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:29:31,363 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:31,363 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 854 [2020-10-26 19:29:31,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:29:31,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:31,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:29:31,364 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:31,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:31,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:31,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:31,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:31,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:31,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:31,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:31,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:31,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:31,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:31,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:31,518 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:31,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65606875] [2020-10-26 19:29:31,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:31,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:29:31,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200602206] [2020-10-26 19:29:31,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:29:31,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:31,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:29:31,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:31,521 INFO L87 Difference]: Start difference. First operand 70 states and 87 transitions. Second operand 12 states. [2020-10-26 19:29:32,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:32,095 INFO L93 Difference]: Finished difference Result 144 states and 185 transitions. [2020-10-26 19:29:32,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:29:32,096 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 25 [2020-10-26 19:29:32,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:32,100 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:29:32,100 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:29:32,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:29:32,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:29:32,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 90. [2020-10-26 19:29:32,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:29:32,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 117 transitions. [2020-10-26 19:29:32,136 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 117 transitions. Word has length 25 [2020-10-26 19:29:32,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:32,136 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 117 transitions. [2020-10-26 19:29:32,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:29:32,136 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 117 transitions. [2020-10-26 19:29:32,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:29:32,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:32,144 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:32,144 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:29:32,145 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:32,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:32,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1373165836, now seen corresponding path program 1 times [2020-10-26 19:29:32,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:32,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874465278] [2020-10-26 19:29:32,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:32,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:32,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:34,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:29:34,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:34,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2042 [2020-10-26 19:29:34,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:29:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:34,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:29:34,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:34,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:34,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:34,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:34,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:34,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:34,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:34,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:34,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:34,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-26 19:29:34,297 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874465278] [2020-10-26 19:29:34,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:34,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-26 19:29:34,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217136768] [2020-10-26 19:29:34,299 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:29:34,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:34,300 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:29:34,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:34,301 INFO L87 Difference]: Start difference. First operand 90 states and 117 transitions. Second operand 7 states. [2020-10-26 19:29:34,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:34,522 INFO L93 Difference]: Finished difference Result 130 states and 166 transitions. [2020-10-26 19:29:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:29:34,523 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-26 19:29:34,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:34,525 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:29:34,525 INFO L226 Difference]: Without dead ends: 117 [2020-10-26 19:29:34,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:34,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-26 19:29:34,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 93. [2020-10-26 19:29:34,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:29:34,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 119 transitions. [2020-10-26 19:29:34,560 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 119 transitions. Word has length 27 [2020-10-26 19:29:34,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:34,563 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 119 transitions. [2020-10-26 19:29:34,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:29:34,563 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 119 transitions. [2020-10-26 19:29:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:29:34,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:34,565 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:34,568 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:29:34,568 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:34,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:34,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1900733106, now seen corresponding path program 2 times [2020-10-26 19:29:34,570 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:34,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [939266607] [2020-10-26 19:29:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:34,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:34,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:34,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:36,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:29:36,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:36,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1893 [2020-10-26 19:29:36,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:36,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:29:36,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:36,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:29:36,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:36,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:36,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:36,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:36,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:36,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:36,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:36,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:36,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:36,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:36,547 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-26 19:29:36,547 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [939266607] [2020-10-26 19:29:36,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:36,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:29:36,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750384910] [2020-10-26 19:29:36,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:29:36,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:36,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:29:36,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:36,551 INFO L87 Difference]: Start difference. First operand 93 states and 119 transitions. Second operand 6 states. [2020-10-26 19:29:36,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:36,702 INFO L93 Difference]: Finished difference Result 115 states and 143 transitions. [2020-10-26 19:29:36,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:29:36,703 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-26 19:29:36,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:36,704 INFO L225 Difference]: With dead ends: 115 [2020-10-26 19:29:36,705 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:29:36,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:36,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:29:36,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 91. [2020-10-26 19:29:36,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:29:36,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 116 transitions. [2020-10-26 19:29:36,721 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 116 transitions. Word has length 27 [2020-10-26 19:29:36,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:36,721 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 116 transitions. [2020-10-26 19:29:36,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:29:36,722 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 116 transitions. [2020-10-26 19:29:36,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:29:36,729 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:36,730 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:36,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:29:36,730 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:36,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:36,731 INFO L82 PathProgramCache]: Analyzing trace with hash 211789364, now seen corresponding path program 1 times [2020-10-26 19:29:36,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:36,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649343162] [2020-10-26 19:29:36,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:36,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:36,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:37,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:29:37,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:37,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 845 [2020-10-26 19:29:37,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:29:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:37,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:29:37,590 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:37,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:37,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:37,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:37,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:37,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:37,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:37,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:37,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:37,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:37,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:37,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:37,662 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:37,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649343162] [2020-10-26 19:29:37,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:37,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:29:37,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38856782] [2020-10-26 19:29:37,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:29:37,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:37,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:29:37,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:37,671 INFO L87 Difference]: Start difference. First operand 91 states and 116 transitions. Second operand 7 states. [2020-10-26 19:29:37,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:37,785 INFO L93 Difference]: Finished difference Result 157 states and 200 transitions. [2020-10-26 19:29:37,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:29:37,785 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-26 19:29:37,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:37,787 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:29:37,788 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:29:37,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:37,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:29:37,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-10-26 19:29:37,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-10-26 19:29:37,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 134 transitions. [2020-10-26 19:29:37,804 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 134 transitions. Word has length 27 [2020-10-26 19:29:37,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:37,804 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 134 transitions. [2020-10-26 19:29:37,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:29:37,804 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 134 transitions. [2020-10-26 19:29:37,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-26 19:29:37,806 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:37,806 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:37,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:29:37,807 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:37,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:37,807 INFO L82 PathProgramCache]: Analyzing trace with hash -867106042, now seen corresponding path program 2 times [2020-10-26 19:29:37,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:37,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735568340] [2020-10-26 19:29:37,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:37,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:37,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:39,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-26 19:29:39,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:39,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1277 [2020-10-26 19:29:39,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:39,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:29:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:39,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:29:39,102 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:39,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:39,176 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:39,176 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:39,176 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:39,176 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:39,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:39,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:39,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735568340] [2020-10-26 19:29:39,182 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:39,182 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:29:39,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418234572] [2020-10-26 19:29:39,183 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:29:39,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:39,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:29:39,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:39,184 INFO L87 Difference]: Start difference. First operand 106 states and 134 transitions. Second operand 8 states. [2020-10-26 19:29:39,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:39,304 INFO L93 Difference]: Finished difference Result 186 states and 240 transitions. [2020-10-26 19:29:39,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:29:39,305 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 28 [2020-10-26 19:29:39,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:39,306 INFO L225 Difference]: With dead ends: 186 [2020-10-26 19:29:39,307 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:29:39,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:29:39,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 128. [2020-10-26 19:29:39,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-26 19:29:39,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 162 transitions. [2020-10-26 19:29:39,325 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 162 transitions. Word has length 28 [2020-10-26 19:29:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:39,325 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 162 transitions. [2020-10-26 19:29:39,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:29:39,325 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 162 transitions. [2020-10-26 19:29:39,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:29:39,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:39,328 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:39,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:29:39,329 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:39,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash -2109920944, now seen corresponding path program 3 times [2020-10-26 19:29:39,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:39,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1404643249] [2020-10-26 19:29:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:39,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:39,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:39,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:40,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:40,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:29:40,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:40,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1607 [2020-10-26 19:29:40,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:40,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:29:40,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:40,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:29:40,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:41,038 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:41,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:41,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:41,045 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:41,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:41,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:41,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:41,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:41,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:41,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:41,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:41,056 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:41,056 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1404643249] [2020-10-26 19:29:41,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:41,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:29:41,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909370882] [2020-10-26 19:29:41,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:29:41,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:41,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:29:41,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:41,061 INFO L87 Difference]: Start difference. First operand 128 states and 162 transitions. Second operand 9 states. [2020-10-26 19:29:41,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:41,229 INFO L93 Difference]: Finished difference Result 210 states and 272 transitions. [2020-10-26 19:29:41,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:29:41,230 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 31 [2020-10-26 19:29:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:41,232 INFO L225 Difference]: With dead ends: 210 [2020-10-26 19:29:41,233 INFO L226 Difference]: Without dead ends: 168 [2020-10-26 19:29:41,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:41,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-26 19:29:41,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 152. [2020-10-26 19:29:41,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-26 19:29:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 194 transitions. [2020-10-26 19:29:41,249 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 194 transitions. Word has length 31 [2020-10-26 19:29:41,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:41,253 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 194 transitions. [2020-10-26 19:29:41,253 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:29:41,253 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 194 transitions. [2020-10-26 19:29:41,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-26 19:29:41,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:41,255 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:41,255 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:29:41,255 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:41,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:41,256 INFO L82 PathProgramCache]: Analyzing trace with hash 104392390, now seen corresponding path program 4 times [2020-10-26 19:29:41,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:41,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729339395] [2020-10-26 19:29:41,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:41,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:43,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-26 19:29:43,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:43,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1992 [2020-10-26 19:29:43,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:43,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:29:43,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:43,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:29:43,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:43,350 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:43,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:43,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:43,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:43,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:43,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:43,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:43,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:43,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:43,361 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:43,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729339395] [2020-10-26 19:29:43,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:43,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:29:43,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268810457] [2020-10-26 19:29:43,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:29:43,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:43,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:29:43,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:43,364 INFO L87 Difference]: Start difference. First operand 152 states and 194 transitions. Second operand 10 states. [2020-10-26 19:29:43,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:43,479 INFO L93 Difference]: Finished difference Result 234 states and 304 transitions. [2020-10-26 19:29:43,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:29:43,480 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-26 19:29:43,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:43,482 INFO L225 Difference]: With dead ends: 234 [2020-10-26 19:29:43,482 INFO L226 Difference]: Without dead ends: 192 [2020-10-26 19:29:43,483 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:43,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-26 19:29:43,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 176. [2020-10-26 19:29:43,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-26 19:29:43,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2020-10-26 19:29:43,502 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 34 [2020-10-26 19:29:43,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:43,502 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2020-10-26 19:29:43,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:29:43,502 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2020-10-26 19:29:43,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:29:43,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:43,504 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:43,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:29:43,504 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:43,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:43,505 INFO L82 PathProgramCache]: Analyzing trace with hash 310226320, now seen corresponding path program 5 times [2020-10-26 19:29:43,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:43,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070978671] [2020-10-26 19:29:43,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:43,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:43,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:46,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:29:46,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:46,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2506 [2020-10-26 19:29:46,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:46,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:29:46,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:46,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:29:46,024 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:46,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:46,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:46,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:46,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:46,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:46,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:46,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:46,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:46,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:46,069 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:29:46,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070978671] [2020-10-26 19:29:46,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:46,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:29:46,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224468504] [2020-10-26 19:29:46,071 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:29:46,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:46,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:29:46,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:29:46,072 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand 4 states. [2020-10-26 19:29:46,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:46,144 INFO L93 Difference]: Finished difference Result 346 states and 446 transitions. [2020-10-26 19:29:46,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:29:46,144 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-26 19:29:46,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:46,146 INFO L225 Difference]: With dead ends: 346 [2020-10-26 19:29:46,146 INFO L226 Difference]: Without dead ends: 178 [2020-10-26 19:29:46,147 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:29:46,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-26 19:29:46,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2020-10-26 19:29:46,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-26 19:29:46,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 227 transitions. [2020-10-26 19:29:46,164 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 227 transitions. Word has length 37 [2020-10-26 19:29:46,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:46,164 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 227 transitions. [2020-10-26 19:29:46,164 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:29:46,164 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 227 transitions. [2020-10-26 19:29:46,165 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:29:46,165 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:46,165 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:46,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:29:46,166 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:46,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:46,168 INFO L82 PathProgramCache]: Analyzing trace with hash -553163410, now seen corresponding path program 1 times [2020-10-26 19:29:46,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:46,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272597683] [2020-10-26 19:29:46,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:46,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,192 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:51,192 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:29:51,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:51,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:29:51,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:29:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:51,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:29:51,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:51,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:51,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:51,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:51,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:51,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:51,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:51,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:51,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:51,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:51,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:51,303 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:29:51,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272597683] [2020-10-26 19:29:51,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:51,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:29:51,305 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934442696] [2020-10-26 19:29:51,305 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:29:51,305 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:51,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:29:51,306 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:51,306 INFO L87 Difference]: Start difference. First operand 177 states and 227 transitions. Second operand 11 states. [2020-10-26 19:29:51,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:51,470 INFO L93 Difference]: Finished difference Result 259 states and 337 transitions. [2020-10-26 19:29:51,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:29:51,471 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 39 [2020-10-26 19:29:51,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:51,474 INFO L225 Difference]: With dead ends: 259 [2020-10-26 19:29:51,474 INFO L226 Difference]: Without dead ends: 217 [2020-10-26 19:29:51,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:51,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-26 19:29:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 201. [2020-10-26 19:29:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-26 19:29:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 259 transitions. [2020-10-26 19:29:51,495 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 259 transitions. Word has length 39 [2020-10-26 19:29:51,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:51,495 INFO L481 AbstractCegarLoop]: Abstraction has 201 states and 259 transitions. [2020-10-26 19:29:51,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:29:51,496 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 259 transitions. [2020-10-26 19:29:51,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:29:51,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:51,497 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:51,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:29:51,497 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:51,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:51,498 INFO L82 PathProgramCache]: Analyzing trace with hash 411225576, now seen corresponding path program 2 times [2020-10-26 19:29:51,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:51,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1026505666] [2020-10-26 19:29:51,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:51,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:51,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:56,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:29:56,517 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:56,517 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:29:56,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:56,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:29:56,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:56,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:29:56,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:56,634 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:56,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:56,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:56,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:56,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:56,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:56,641 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:56,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:56,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:56,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:29:56,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1026505666] [2020-10-26 19:29:56,657 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:56,657 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:29:56,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917075131] [2020-10-26 19:29:56,657 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:29:56,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:56,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:29:56,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:56,659 INFO L87 Difference]: Start difference. First operand 201 states and 259 transitions. Second operand 12 states. [2020-10-26 19:29:56,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:56,795 INFO L93 Difference]: Finished difference Result 283 states and 369 transitions. [2020-10-26 19:29:56,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:29:56,796 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-26 19:29:56,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:56,798 INFO L225 Difference]: With dead ends: 283 [2020-10-26 19:29:56,798 INFO L226 Difference]: Without dead ends: 241 [2020-10-26 19:29:56,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:56,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-26 19:29:56,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 225. [2020-10-26 19:29:56,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 225 states. [2020-10-26 19:29:56,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 291 transitions. [2020-10-26 19:29:56,808 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 291 transitions. Word has length 42 [2020-10-26 19:29:56,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:56,809 INFO L481 AbstractCegarLoop]: Abstraction has 225 states and 291 transitions. [2020-10-26 19:29:56,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:29:56,809 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 291 transitions. [2020-10-26 19:29:56,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:29:56,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:56,810 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:56,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:29:56,810 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:56,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:56,811 INFO L82 PathProgramCache]: Analyzing trace with hash 1487264558, now seen corresponding path program 3 times [2020-10-26 19:29:56,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:56,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [29866532] [2020-10-26 19:29:56,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:56,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:56,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:01,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:01,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:30:01,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:01,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:30:01,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:30:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:01,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:30:01,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:01,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:01,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:01,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:01,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:01,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:01,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:01,980 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:30:01,980 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:01,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:01,981 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:01,993 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:30:01,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [29866532] [2020-10-26 19:30:01,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:01,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:30:01,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229471781] [2020-10-26 19:30:01,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:30:01,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:01,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:30:01,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:01,996 INFO L87 Difference]: Start difference. First operand 225 states and 291 transitions. Second operand 13 states. [2020-10-26 19:30:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:02,165 INFO L93 Difference]: Finished difference Result 307 states and 401 transitions. [2020-10-26 19:30:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:30:02,166 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 45 [2020-10-26 19:30:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:02,168 INFO L225 Difference]: With dead ends: 307 [2020-10-26 19:30:02,168 INFO L226 Difference]: Without dead ends: 265 [2020-10-26 19:30:02,169 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:30:02,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2020-10-26 19:30:02,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 249. [2020-10-26 19:30:02,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 249 states. [2020-10-26 19:30:02,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 323 transitions. [2020-10-26 19:30:02,187 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 323 transitions. Word has length 45 [2020-10-26 19:30:02,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:02,188 INFO L481 AbstractCegarLoop]: Abstraction has 249 states and 323 transitions. [2020-10-26 19:30:02,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:30:02,190 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 323 transitions. [2020-10-26 19:30:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-26 19:30:02,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:02,192 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:02,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:30:02,193 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:02,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:02,197 INFO L82 PathProgramCache]: Analyzing trace with hash 128679976, now seen corresponding path program 4 times [2020-10-26 19:30:02,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:02,197 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [961440815] [2020-10-26 19:30:02,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:02,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:02,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:07,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-26 19:30:07,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:07,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:30:07,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:07,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:30:07,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:07,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:30:07,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:07,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:07,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:07,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:07,914 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:07,914 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:07,914 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:07,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-26 19:30:07,915 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:07,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:07,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:07,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:07,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 63 proven. 82 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:30:07,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [961440815] [2020-10-26 19:30:07,938 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:07,938 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:30:07,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110913272] [2020-10-26 19:30:07,939 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:30:07,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:07,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:30:07,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:07,944 INFO L87 Difference]: Start difference. First operand 249 states and 323 transitions. Second operand 19 states. [2020-10-26 19:30:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:09,288 INFO L93 Difference]: Finished difference Result 488 states and 633 transitions. [2020-10-26 19:30:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:30:09,289 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 48 [2020-10-26 19:30:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:09,295 INFO L225 Difference]: With dead ends: 488 [2020-10-26 19:30:09,295 INFO L226 Difference]: Without dead ends: 484 [2020-10-26 19:30:09,298 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=308, Invalid=882, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:30:09,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2020-10-26 19:30:09,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 168. [2020-10-26 19:30:09,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-26 19:30:09,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 215 transitions. [2020-10-26 19:30:09,338 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 215 transitions. Word has length 48 [2020-10-26 19:30:09,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:09,338 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 215 transitions. [2020-10-26 19:30:09,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:30:09,338 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 215 transitions. [2020-10-26 19:30:09,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-26 19:30:09,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:09,339 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:09,340 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:30:09,340 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:09,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:09,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1674900790, now seen corresponding path program 1 times [2020-10-26 19:30:09,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:09,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [625683733] [2020-10-26 19:30:09,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:09,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:09,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:09,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:13,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-26 19:30:13,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:13,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4042 [2020-10-26 19:30:13,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:13,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:30:13,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:13,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:30:13,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:13,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:13,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:13,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:13,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:13,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:13,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:13,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:13,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:13,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:13,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:13,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:13,542 INFO L134 CoverageAnalysis]: Checked inductivity of 146 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:30:13,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [625683733] [2020-10-26 19:30:13,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:13,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:30:13,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837390938] [2020-10-26 19:30:13,543 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:30:13,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:13,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:30:13,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:13,544 INFO L87 Difference]: Start difference. First operand 168 states and 215 transitions. Second operand 14 states. [2020-10-26 19:30:13,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:13,723 INFO L93 Difference]: Finished difference Result 236 states and 303 transitions. [2020-10-26 19:30:13,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:30:13,725 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-26 19:30:13,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:13,728 INFO L225 Difference]: With dead ends: 236 [2020-10-26 19:30:13,728 INFO L226 Difference]: Without dead ends: 196 [2020-10-26 19:30:13,729 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:30:13,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-26 19:30:13,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 180. [2020-10-26 19:30:13,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-26 19:30:13,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 231 transitions. [2020-10-26 19:30:13,743 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 231 transitions. Word has length 50 [2020-10-26 19:30:13,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:13,743 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 231 transitions. [2020-10-26 19:30:13,743 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:30:13,743 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 231 transitions. [2020-10-26 19:30:13,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:30:13,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:13,744 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:13,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:30:13,744 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:13,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:13,745 INFO L82 PathProgramCache]: Analyzing trace with hash -668315758, now seen corresponding path program 2 times [2020-10-26 19:30:13,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:13,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123763498] [2020-10-26 19:30:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:13,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:13,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:18,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:30:18,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:18,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4269 [2020-10-26 19:30:18,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:30:18,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:18,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:30:18,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:18,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:18,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,172 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:18,173 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:18,173 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:18,173 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:18,173 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:18,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:18,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:18,173 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:18,174 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:18,181 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:30:18,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123763498] [2020-10-26 19:30:18,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:18,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:30:18,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869695490] [2020-10-26 19:30:18,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:30:18,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:18,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:30:18,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:30:18,183 INFO L87 Difference]: Start difference. First operand 180 states and 231 transitions. Second operand 15 states. [2020-10-26 19:30:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:18,365 INFO L93 Difference]: Finished difference Result 248 states and 319 transitions. [2020-10-26 19:30:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:30:18,365 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 53 [2020-10-26 19:30:18,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:18,367 INFO L225 Difference]: With dead ends: 248 [2020-10-26 19:30:18,368 INFO L226 Difference]: Without dead ends: 208 [2020-10-26 19:30:18,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:30:18,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-26 19:30:18,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 192. [2020-10-26 19:30:18,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-26 19:30:18,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 247 transitions. [2020-10-26 19:30:18,383 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 247 transitions. Word has length 53 [2020-10-26 19:30:18,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:18,383 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 247 transitions. [2020-10-26 19:30:18,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:30:18,383 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 247 transitions. [2020-10-26 19:30:18,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-26 19:30:18,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:18,384 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:18,384 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:30:18,384 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:18,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:18,385 INFO L82 PathProgramCache]: Analyzing trace with hash -955288118, now seen corresponding path program 3 times [2020-10-26 19:30:18,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:18,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1840462346] [2020-10-26 19:30:18,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:18,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:18,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:18,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:23,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-26 19:30:23,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:23,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:30:23,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:23,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:30:23,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:23,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:30:23,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:23,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:23,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:23,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:23,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:23,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:23,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:23,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:23,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:23,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:23,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:23,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:30:23,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1840462346] [2020-10-26 19:30:23,448 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:23,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:30:23,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035727128] [2020-10-26 19:30:23,449 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:30:23,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:23,450 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:30:23,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:30:23,451 INFO L87 Difference]: Start difference. First operand 192 states and 247 transitions. Second operand 5 states. [2020-10-26 19:30:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:23,541 INFO L93 Difference]: Finished difference Result 378 states and 488 transitions. [2020-10-26 19:30:23,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:30:23,542 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 56 [2020-10-26 19:30:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:23,543 INFO L225 Difference]: With dead ends: 378 [2020-10-26 19:30:23,543 INFO L226 Difference]: Without dead ends: 195 [2020-10-26 19:30:23,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:30:23,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-26 19:30:23,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2020-10-26 19:30:23,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2020-10-26 19:30:23,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 249 transitions. [2020-10-26 19:30:23,562 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 249 transitions. Word has length 56 [2020-10-26 19:30:23,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:23,562 INFO L481 AbstractCegarLoop]: Abstraction has 194 states and 249 transitions. [2020-10-26 19:30:23,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:30:23,562 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 249 transitions. [2020-10-26 19:30:23,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-26 19:30:23,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:23,565 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:23,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:30:23,565 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:23,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:23,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1032043220, now seen corresponding path program 4 times [2020-10-26 19:30:23,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:23,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587174206] [2020-10-26 19:30:23,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:23,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:23,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:24,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-26 19:30:28,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:28,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:28,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:28,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:28,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:28,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:28,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:28,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:28,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:28,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:28,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:28,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:28,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:28,765 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:30:28,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587174206] [2020-10-26 19:30:28,767 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:28,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:30:28,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219312319] [2020-10-26 19:30:28,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:30:28,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:28,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:30:28,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:28,770 INFO L87 Difference]: Start difference. First operand 194 states and 249 transitions. Second operand 16 states. [2020-10-26 19:30:28,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:28,980 INFO L93 Difference]: Finished difference Result 262 states and 337 transitions. [2020-10-26 19:30:28,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:30:28,981 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 58 [2020-10-26 19:30:28,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:28,982 INFO L225 Difference]: With dead ends: 262 [2020-10-26 19:30:28,983 INFO L226 Difference]: Without dead ends: 222 [2020-10-26 19:30:28,983 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:28,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-26 19:30:28,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 206. [2020-10-26 19:30:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-26 19:30:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 265 transitions. [2020-10-26 19:30:29,001 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 265 transitions. Word has length 58 [2020-10-26 19:30:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:29,001 INFO L481 AbstractCegarLoop]: Abstraction has 206 states and 265 transitions. [2020-10-26 19:30:29,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:30:29,002 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 265 transitions. [2020-10-26 19:30:29,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:30:29,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:29,003 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:29,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:30:29,003 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:29,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:29,004 INFO L82 PathProgramCache]: Analyzing trace with hash -557620752, now seen corresponding path program 5 times [2020-10-26 19:30:29,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:29,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1914562465] [2020-10-26 19:30:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:29,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:29,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:29,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:29,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:34,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:34,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:30:34,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:34,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:30:34,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:30:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:34,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-26 19:30:34,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:34,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:34,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:34,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:34,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:34,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:34,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:34,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:34,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:34,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:34,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:34,879 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 165 proven. 82 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-26 19:30:34,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1914562465] [2020-10-26 19:30:34,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:34,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:30:34,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791614142] [2020-10-26 19:30:34,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:30:34,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:34,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:30:34,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:30:34,882 INFO L87 Difference]: Start difference. First operand 206 states and 265 transitions. Second operand 22 states. [2020-10-26 19:30:35,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:35,468 INFO L93 Difference]: Finished difference Result 223 states and 283 transitions. [2020-10-26 19:30:35,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:30:35,469 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 61 [2020-10-26 19:30:35,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:35,471 INFO L225 Difference]: With dead ends: 223 [2020-10-26 19:30:35,471 INFO L226 Difference]: Without dead ends: 219 [2020-10-26 19:30:35,475 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:30:35,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-26 19:30:35,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 213. [2020-10-26 19:30:35,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-26 19:30:35,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 272 transitions. [2020-10-26 19:30:35,494 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 272 transitions. Word has length 61 [2020-10-26 19:30:35,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:35,494 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 272 transitions. [2020-10-26 19:30:35,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:30:35,494 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 272 transitions. [2020-10-26 19:30:35,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:30:35,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:35,502 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:35,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:30:35,502 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:35,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:35,503 INFO L82 PathProgramCache]: Analyzing trace with hash 411227220, now seen corresponding path program 1 times [2020-10-26 19:30:35,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:35,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882654963] [2020-10-26 19:30:35,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:35,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:35,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:35,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:36,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:30:40,526 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:40,557 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:40,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,561 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:40,561 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:40,561 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:40,561 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:40,561 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:40,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:40,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:40,562 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:40,562 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:40,563 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2020-10-26 19:30:40,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:40,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:40,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:30:40,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:40,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:40,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:40,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:40,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:30:40,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:40,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:40,572 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 249 trivial. 0 not checked. [2020-10-26 19:30:40,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882654963] [2020-10-26 19:30:40,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:40,573 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:30:40,573 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714405360] [2020-10-26 19:30:40,573 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:30:40,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:40,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:30:40,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:30:40,574 INFO L87 Difference]: Start difference. First operand 213 states and 272 transitions. Second operand 6 states. [2020-10-26 19:30:40,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:40,679 INFO L93 Difference]: Finished difference Result 418 states and 536 transitions. [2020-10-26 19:30:40,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:30:40,680 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 67 [2020-10-26 19:30:40,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:40,681 INFO L225 Difference]: With dead ends: 418 [2020-10-26 19:30:40,681 INFO L226 Difference]: Without dead ends: 216 [2020-10-26 19:30:40,682 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:30:40,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-26 19:30:40,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2020-10-26 19:30:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-26 19:30:40,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 274 transitions. [2020-10-26 19:30:40,712 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 274 transitions. Word has length 67 [2020-10-26 19:30:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:40,712 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 274 transitions. [2020-10-26 19:30:40,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:30:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 274 transitions. [2020-10-26 19:30:40,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:30:40,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:40,715 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:40,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:30:40,716 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:40,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:40,716 INFO L82 PathProgramCache]: Analyzing trace with hash -1739590734, now seen corresponding path program 2 times [2020-10-26 19:30:40,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:40,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602981194] [2020-10-26 19:30:40,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:40,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:40,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:40,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:45,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:30:45,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:45,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:30:45,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:45,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:30:45,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:45,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:30:45,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:45,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:45,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:45,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:45,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:45,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:45,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:45,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:45,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:45,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:45,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:45,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2020-10-26 19:30:45,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:45,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:45,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:45,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:30:45,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:45,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:45,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:45,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:30:45,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:45,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:45,949 INFO L134 CoverageAnalysis]: Checked inductivity of 260 backedges. 2 proven. 247 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 19:30:45,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602981194] [2020-10-26 19:30:45,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:45,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:30:45,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161778874] [2020-10-26 19:30:45,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:30:45,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:45,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:30:45,951 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:45,951 INFO L87 Difference]: Start difference. First operand 215 states and 274 transitions. Second operand 17 states. [2020-10-26 19:30:46,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:46,149 INFO L93 Difference]: Finished difference Result 290 states and 369 transitions. [2020-10-26 19:30:46,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:30:46,150 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 69 [2020-10-26 19:30:46,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:46,152 INFO L225 Difference]: With dead ends: 290 [2020-10-26 19:30:46,152 INFO L226 Difference]: Without dead ends: 243 [2020-10-26 19:30:46,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-26 19:30:46,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 227. [2020-10-26 19:30:46,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-26 19:30:46,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 290 transitions. [2020-10-26 19:30:46,166 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 290 transitions. Word has length 69 [2020-10-26 19:30:46,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:46,167 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 290 transitions. [2020-10-26 19:30:46,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:30:46,167 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 290 transitions. [2020-10-26 19:30:46,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:30:46,168 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:46,168 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:46,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:30:46,169 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:46,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:46,169 INFO L82 PathProgramCache]: Analyzing trace with hash 842064308, now seen corresponding path program 3 times [2020-10-26 19:30:46,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:46,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901658568] [2020-10-26 19:30:46,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:46,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:46,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:46,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:51,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-26 19:30:51,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:51,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:30:51,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:30:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:51,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:30:51,201 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:51,242 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:51,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:51,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:51,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:51,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:51,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:51,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:51,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:51,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:51,249 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2020-10-26 19:30:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:51,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,252 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:51,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:30:51,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:51,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:51,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:30:51,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:51,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:51,258 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 289 trivial. 0 not checked. [2020-10-26 19:30:51,258 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901658568] [2020-10-26 19:30:51,258 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:51,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:30:51,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012630683] [2020-10-26 19:30:51,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:30:51,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:51,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:30:51,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:30:51,259 INFO L87 Difference]: Start difference. First operand 227 states and 290 transitions. Second operand 7 states. [2020-10-26 19:30:51,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:51,365 INFO L93 Difference]: Finished difference Result 444 states and 570 transitions. [2020-10-26 19:30:51,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:30:51,365 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 72 [2020-10-26 19:30:51,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:51,367 INFO L225 Difference]: With dead ends: 444 [2020-10-26 19:30:51,367 INFO L226 Difference]: Without dead ends: 230 [2020-10-26 19:30:51,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:30:51,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-26 19:30:51,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2020-10-26 19:30:51,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-26 19:30:51,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 292 transitions. [2020-10-26 19:30:51,389 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 292 transitions. Word has length 72 [2020-10-26 19:30:51,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:51,389 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 292 transitions. [2020-10-26 19:30:51,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:30:51,389 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 292 transitions. [2020-10-26 19:30:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-26 19:30:51,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:51,391 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:51,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:30:51,391 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:51,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:51,391 INFO L82 PathProgramCache]: Analyzing trace with hash 287747350, now seen corresponding path program 4 times [2020-10-26 19:30:51,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:51,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741523458] [2020-10-26 19:30:51,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:51,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:51,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:51,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:53,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:56,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:56,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-26 19:30:56,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:56,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:30:56,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:30:56,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:56,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-26 19:30:56,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:56,628 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:56,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:56,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:56,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:56,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:56,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:56,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:56,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:56,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:56,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:56,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:56,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:56,636 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2020-10-26 19:30:56,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:56,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:56,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:56,638 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:30:56,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:56,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:30:56,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:30:56,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:56,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:56,646 INFO L134 CoverageAnalysis]: Checked inductivity of 307 backedges. 2 proven. 287 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:30:56,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741523458] [2020-10-26 19:30:56,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:56,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:30:56,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292611869] [2020-10-26 19:30:56,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:30:56,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:56,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:30:56,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:56,649 INFO L87 Difference]: Start difference. First operand 229 states and 292 transitions. Second operand 18 states. [2020-10-26 19:30:56,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:56,874 INFO L93 Difference]: Finished difference Result 304 states and 387 transitions. [2020-10-26 19:30:56,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:30:56,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 74 [2020-10-26 19:30:56,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:56,878 INFO L225 Difference]: With dead ends: 304 [2020-10-26 19:30:56,878 INFO L226 Difference]: Without dead ends: 257 [2020-10-26 19:30:56,879 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:56,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2020-10-26 19:30:56,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 241. [2020-10-26 19:30:56,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 241 states. [2020-10-26 19:30:56,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 308 transitions. [2020-10-26 19:30:56,895 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 308 transitions. Word has length 74 [2020-10-26 19:30:56,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:56,895 INFO L481 AbstractCegarLoop]: Abstraction has 241 states and 308 transitions. [2020-10-26 19:30:56,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:30:56,895 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 308 transitions. [2020-10-26 19:30:56,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:30:56,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:56,897 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:56,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:30:56,897 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:56,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:56,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1440808400, now seen corresponding path program 5 times [2020-10-26 19:30:56,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:56,898 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2024137536] [2020-10-26 19:30:56,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:56,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:56,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:56,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:59,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:01,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:01,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:31:01,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:01,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:31:01,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:31:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:01,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:31:01,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:02,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:02,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:02,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:02,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:02,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:02,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:02,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:02,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:02,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:02,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:02,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:02,152 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:02,153 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2020-10-26 19:31:02,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:02,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:02,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:02,162 INFO L134 CoverageAnalysis]: Checked inductivity of 350 backedges. 2 proven. 330 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:31:02,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2024137536] [2020-10-26 19:31:02,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:02,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:31:02,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868564919] [2020-10-26 19:31:02,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:31:02,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:02,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:31:02,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:31:02,164 INFO L87 Difference]: Start difference. First operand 241 states and 308 transitions. Second operand 19 states. [2020-10-26 19:31:02,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:02,343 INFO L93 Difference]: Finished difference Result 316 states and 403 transitions. [2020-10-26 19:31:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:31:02,344 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 77 [2020-10-26 19:31:02,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:02,346 INFO L225 Difference]: With dead ends: 316 [2020-10-26 19:31:02,346 INFO L226 Difference]: Without dead ends: 269 [2020-10-26 19:31:02,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:31:02,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-26 19:31:02,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 253. [2020-10-26 19:31:02,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 253 states. [2020-10-26 19:31:02,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 324 transitions. [2020-10-26 19:31:02,368 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 324 transitions. Word has length 77 [2020-10-26 19:31:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:02,368 INFO L481 AbstractCegarLoop]: Abstraction has 253 states and 324 transitions. [2020-10-26 19:31:02,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:31:02,368 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 324 transitions. [2020-10-26 19:31:02,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-26 19:31:02,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:02,369 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:02,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:31:02,370 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:02,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:02,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1134115542, now seen corresponding path program 6 times [2020-10-26 19:31:02,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:02,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [415497741] [2020-10-26 19:31:02,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:02,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:02,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:02,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:05,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:07,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:31:07,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:07,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:31:07,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:07,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:31:07,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:07,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 19:31:07,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:07,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:07,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:07,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:07,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:07,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:07,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:07,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:07,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:07,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:07,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:07,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:07,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2020-10-26 19:31:07,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:07,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:07,651 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:07,651 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:07,651 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:07,651 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:07,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:07,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:31:07,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:07,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 2 proven. 376 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-26 19:31:07,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [415497741] [2020-10-26 19:31:07,661 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:07,661 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:31:07,661 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958004588] [2020-10-26 19:31:07,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:31:07,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:07,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:31:07,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:31:07,663 INFO L87 Difference]: Start difference. First operand 253 states and 324 transitions. Second operand 20 states. [2020-10-26 19:31:07,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:07,868 INFO L93 Difference]: Finished difference Result 328 states and 419 transitions. [2020-10-26 19:31:07,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:31:07,869 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 80 [2020-10-26 19:31:07,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:07,871 INFO L225 Difference]: With dead ends: 328 [2020-10-26 19:31:07,871 INFO L226 Difference]: Without dead ends: 281 [2020-10-26 19:31:07,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:31:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-26 19:31:07,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 265. [2020-10-26 19:31:07,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 265 states. [2020-10-26 19:31:07,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 340 transitions. [2020-10-26 19:31:07,889 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 340 transitions. Word has length 80 [2020-10-26 19:31:07,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:07,890 INFO L481 AbstractCegarLoop]: Abstraction has 265 states and 340 transitions. [2020-10-26 19:31:07,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:31:07,890 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 340 transitions. [2020-10-26 19:31:07,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:31:07,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:07,891 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:07,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:31:07,891 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:07,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:07,892 INFO L82 PathProgramCache]: Analyzing trace with hash -157378544, now seen corresponding path program 7 times [2020-10-26 19:31:07,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:07,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [480987092] [2020-10-26 19:31:07,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:07,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:07,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:10,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:12,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:12,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:31:12,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:12,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:31:12,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:31:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 19:31:12,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:13,601 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:13,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:13,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:13,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:13,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:31:13,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:13,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:13,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:13,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:13,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:13,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:13,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:13,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:13,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:13,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:13,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 275 proven. 154 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:31:13,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [480987092] [2020-10-26 19:31:13,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:13,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:31:13,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227095468] [2020-10-26 19:31:13,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:31:13,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:13,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:31:13,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:31:13,635 INFO L87 Difference]: Start difference. First operand 265 states and 340 transitions. Second operand 27 states. [2020-10-26 19:31:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:16,900 INFO L93 Difference]: Finished difference Result 1432 states and 1886 transitions. [2020-10-26 19:31:16,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-26 19:31:16,900 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 83 [2020-10-26 19:31:16,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:16,908 INFO L225 Difference]: With dead ends: 1432 [2020-10-26 19:31:16,909 INFO L226 Difference]: Without dead ends: 1428 [2020-10-26 19:31:16,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1104, Invalid=4008, Unknown=0, NotChecked=0, Total=5112 [2020-10-26 19:31:16,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1428 states. [2020-10-26 19:31:16,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1428 to 407. [2020-10-26 19:31:16,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 407 states. [2020-10-26 19:31:16,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 528 transitions. [2020-10-26 19:31:16,948 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 528 transitions. Word has length 83 [2020-10-26 19:31:16,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:16,949 INFO L481 AbstractCegarLoop]: Abstraction has 407 states and 528 transitions. [2020-10-26 19:31:16,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:31:16,949 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 528 transitions. [2020-10-26 19:31:16,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:31:16,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:16,951 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:16,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:31:16,951 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:16,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:16,951 INFO L82 PathProgramCache]: Analyzing trace with hash -1846322286, now seen corresponding path program 1 times [2020-10-26 19:31:16,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:16,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2117256577] [2020-10-26 19:31:16,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:16,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:16,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:17,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:20,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:21,978 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:21,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:31:21,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:21,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:31:21,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:21,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:31:21,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:21,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 19:31:21,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:22,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:22,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:22,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:22,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:22,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:22,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:22,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:22,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:22,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:22,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:22,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:31:22,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:22,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:22,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:22,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:22,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:22,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:22,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:22,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:22,803 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 236 proven. 193 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2020-10-26 19:31:22,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2117256577] [2020-10-26 19:31:22,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:22,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:31:22,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053330709] [2020-10-26 19:31:22,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:31:22,805 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:22,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:31:22,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=530, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:31:22,806 INFO L87 Difference]: Start difference. First operand 407 states and 528 transitions. Second operand 27 states. [2020-10-26 19:31:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:25,960 INFO L93 Difference]: Finished difference Result 1769 states and 2346 transitions. [2020-10-26 19:31:25,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-26 19:31:25,961 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 83 [2020-10-26 19:31:25,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:25,971 INFO L225 Difference]: With dead ends: 1769 [2020-10-26 19:31:25,971 INFO L226 Difference]: Without dead ends: 1765 [2020-10-26 19:31:25,973 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1295 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1032, Invalid=3660, Unknown=0, NotChecked=0, Total=4692 [2020-10-26 19:31:25,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1765 states. [2020-10-26 19:31:26,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1765 to 418. [2020-10-26 19:31:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 418 states. [2020-10-26 19:31:26,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 541 transitions. [2020-10-26 19:31:26,014 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 541 transitions. Word has length 83 [2020-10-26 19:31:26,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:26,014 INFO L481 AbstractCegarLoop]: Abstraction has 418 states and 541 transitions. [2020-10-26 19:31:26,014 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:31:26,015 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 541 transitions. [2020-10-26 19:31:26,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:31:26,016 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:26,016 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:26,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:31:26,017 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:26,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:26,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2030345744, now seen corresponding path program 2 times [2020-10-26 19:31:26,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:26,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647064946] [2020-10-26 19:31:26,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:26,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:26,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:26,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:31:31,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:31,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:31,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:31,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:31,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:31,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:31,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:31,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:31,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:31,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:31,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2020-10-26 19:31:31,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:31,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:31,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:31,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:31,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:31,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-26 19:31:31,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:31:31,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:31,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:31,140 INFO L134 CoverageAnalysis]: Checked inductivity of 445 backedges. 2 proven. 16 refuted. 0 times theorem prover too weak. 427 trivial. 0 not checked. [2020-10-26 19:31:31,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647064946] [2020-10-26 19:31:31,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:31,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:31:31,143 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91321391] [2020-10-26 19:31:31,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:31:31,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:31,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:31:31,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:31:31,148 INFO L87 Difference]: Start difference. First operand 418 states and 541 transitions. Second operand 8 states. [2020-10-26 19:31:31,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:31,264 INFO L93 Difference]: Finished difference Result 824 states and 1070 transitions. [2020-10-26 19:31:31,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:31:31,265 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-26 19:31:31,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:31,269 INFO L225 Difference]: With dead ends: 824 [2020-10-26 19:31:31,269 INFO L226 Difference]: Without dead ends: 421 [2020-10-26 19:31:31,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:31:31,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2020-10-26 19:31:31,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 420. [2020-10-26 19:31:31,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2020-10-26 19:31:31,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 543 transitions. [2020-10-26 19:31:31,298 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 543 transitions. Word has length 83 [2020-10-26 19:31:31,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:31,298 INFO L481 AbstractCegarLoop]: Abstraction has 420 states and 543 transitions. [2020-10-26 19:31:31,298 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:31:31,298 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 543 transitions. [2020-10-26 19:31:31,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:31:31,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:31,300 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:31,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:31:31,302 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:31,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:31,302 INFO L82 PathProgramCache]: Analyzing trace with hash -283950738, now seen corresponding path program 3 times [2020-10-26 19:31:31,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:31,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [592977907] [2020-10-26 19:31:31,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:31,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:31,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:32,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:36,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:36,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:31:36,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:36,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:31:36,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:36,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:31:36,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:36,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:31:36,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:36,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:36,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:36,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:36,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:36,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:36,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:36,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:36,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:36,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:36,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:36,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:36,394 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:31:36,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:36,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:36,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:36,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:36,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:36,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:36,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:36,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:36,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:36,408 INFO L134 CoverageAnalysis]: Checked inductivity of 454 backedges. 4 proven. 33 refuted. 0 times theorem prover too weak. 417 trivial. 0 not checked. [2020-10-26 19:31:36,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [592977907] [2020-10-26 19:31:36,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:36,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:31:36,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040341264] [2020-10-26 19:31:36,409 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:31:36,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:36,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:31:36,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:31:36,410 INFO L87 Difference]: Start difference. First operand 420 states and 543 transitions. Second operand 7 states. [2020-10-26 19:31:36,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:36,601 INFO L93 Difference]: Finished difference Result 453 states and 582 transitions. [2020-10-26 19:31:36,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:31:36,602 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 85 [2020-10-26 19:31:36,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:36,604 INFO L225 Difference]: With dead ends: 453 [2020-10-26 19:31:36,604 INFO L226 Difference]: Without dead ends: 436 [2020-10-26 19:31:36,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:31:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-26 19:31:36,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 423. [2020-10-26 19:31:36,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-10-26 19:31:36,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 546 transitions. [2020-10-26 19:31:36,634 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 546 transitions. Word has length 85 [2020-10-26 19:31:36,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:36,634 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 546 transitions. [2020-10-26 19:31:36,634 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:31:36,634 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 546 transitions. [2020-10-26 19:31:36,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:31:36,636 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:36,636 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 16, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:36,636 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:31:36,636 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:36,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:36,636 INFO L82 PathProgramCache]: Analyzing trace with hash 297384148, now seen corresponding path program 1 times [2020-10-26 19:31:36,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:36,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444625761] [2020-10-26 19:31:36,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:36,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:36,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:36,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:37,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:41,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:31:41,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:41,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:31:41,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:31:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:41,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:31:41,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,960 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:41,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:41,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:41,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:41,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:41,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:41,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:41,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:41,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,965 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2020-10-26 19:31:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:41,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:41,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:41,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:41,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:41,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:41,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:41,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:41,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:31:41,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:41,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:41,993 INFO L134 CoverageAnalysis]: Checked inductivity of 453 backedges. 2 proven. 425 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:31:41,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444625761] [2020-10-26 19:31:41,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:41,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:31:41,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711626100] [2020-10-26 19:31:41,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:31:41,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:41,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:31:41,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:31:41,996 INFO L87 Difference]: Start difference. First operand 423 states and 546 transitions. Second operand 21 states. [2020-10-26 19:31:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:42,275 INFO L93 Difference]: Finished difference Result 537 states and 691 transitions. [2020-10-26 19:31:42,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:31:42,275 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 87 [2020-10-26 19:31:42,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:42,278 INFO L225 Difference]: With dead ends: 537 [2020-10-26 19:31:42,278 INFO L226 Difference]: Without dead ends: 461 [2020-10-26 19:31:42,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:31:42,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2020-10-26 19:31:42,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 444. [2020-10-26 19:31:42,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 444 states. [2020-10-26 19:31:42,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 444 states to 444 states and 574 transitions. [2020-10-26 19:31:42,304 INFO L78 Accepts]: Start accepts. Automaton has 444 states and 574 transitions. Word has length 87 [2020-10-26 19:31:42,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:42,304 INFO L481 AbstractCegarLoop]: Abstraction has 444 states and 574 transitions. [2020-10-26 19:31:42,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:31:42,304 INFO L276 IsEmpty]: Start isEmpty. Operand 444 states and 574 transitions. [2020-10-26 19:31:42,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:31:42,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:42,306 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:42,306 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:31:42,306 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:42,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:42,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1267929950, now seen corresponding path program 2 times [2020-10-26 19:31:42,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:42,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318638926] [2020-10-26 19:31:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:42,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:42,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:42,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:43,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:47,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:31:47,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:47,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:31:47,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:47,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:31:47,347 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:47,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 19:31:47,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:47,643 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:47,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:47,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,647 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:47,647 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:47,647 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:47,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:47,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:47,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:47,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:47,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:31:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:47,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:47,652 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:47,663 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 477 proven. 1 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-26 19:31:47,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318638926] [2020-10-26 19:31:47,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:47,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:31:47,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661824555] [2020-10-26 19:31:47,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:31:47,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:47,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:31:47,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=309, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:31:47,665 INFO L87 Difference]: Start difference. First operand 444 states and 574 transitions. Second operand 23 states. [2020-10-26 19:31:48,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:48,508 INFO L93 Difference]: Finished difference Result 1905 states and 2551 transitions. [2020-10-26 19:31:48,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:31:48,509 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 90 [2020-10-26 19:31:48,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:48,520 INFO L225 Difference]: With dead ends: 1905 [2020-10-26 19:31:48,520 INFO L226 Difference]: Without dead ends: 1892 [2020-10-26 19:31:48,521 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=263, Invalid=387, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:31:48,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1892 states. [2020-10-26 19:31:48,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1892 to 1495. [2020-10-26 19:31:48,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1495 states. [2020-10-26 19:31:48,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 1990 transitions. [2020-10-26 19:31:48,581 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 1990 transitions. Word has length 90 [2020-10-26 19:31:48,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:48,581 INFO L481 AbstractCegarLoop]: Abstraction has 1495 states and 1990 transitions. [2020-10-26 19:31:48,581 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:31:48,582 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 1990 transitions. [2020-10-26 19:31:48,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:31:48,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:48,585 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 16, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:48,586 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:31:48,586 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:48,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:48,586 INFO L82 PathProgramCache]: Analyzing trace with hash 1133916444, now seen corresponding path program 3 times [2020-10-26 19:31:48,586 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:48,587 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1360965853] [2020-10-26 19:31:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:48,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:48,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:48,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:49,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:53,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:31:53,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:53,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:31:53,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:31:53,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:53,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 19:31:53,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:53,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:53,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:53,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:53,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:53,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:53,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:53,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:53,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:53,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:53,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:53,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:53,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:31:53,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:53,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:53,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:53,935 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:31:53,935 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:53,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:53,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:53,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:31:53,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:53,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:31:53,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:53,948 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 437 proven. 36 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-26 19:31:53,950 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1360965853] [2020-10-26 19:31:53,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:53,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:31:53,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644021737] [2020-10-26 19:31:53,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:31:53,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:53,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:31:53,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=284, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:31:53,952 INFO L87 Difference]: Start difference. First operand 1495 states and 1990 transitions. Second operand 22 states. [2020-10-26 19:31:54,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:54,880 INFO L93 Difference]: Finished difference Result 1894 states and 2533 transitions. [2020-10-26 19:31:54,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:31:54,881 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-26 19:31:54,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:54,891 INFO L225 Difference]: With dead ends: 1894 [2020-10-26 19:31:54,891 INFO L226 Difference]: Without dead ends: 1881 [2020-10-26 19:31:54,892 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=334, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:31:54,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1881 states. [2020-10-26 19:31:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1881 to 1486. [2020-10-26 19:31:54,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1486 states. [2020-10-26 19:31:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1486 states to 1486 states and 1975 transitions. [2020-10-26 19:31:54,957 INFO L78 Accepts]: Start accepts. Automaton has 1486 states and 1975 transitions. Word has length 90 [2020-10-26 19:31:54,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:54,957 INFO L481 AbstractCegarLoop]: Abstraction has 1486 states and 1975 transitions. [2020-10-26 19:31:54,958 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:31:54,958 INFO L276 IsEmpty]: Start isEmpty. Operand 1486 states and 1975 transitions. [2020-10-26 19:31:54,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2020-10-26 19:31:54,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:54,962 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 15, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:54,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:31:54,962 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:54,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:54,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1237822818, now seen corresponding path program 4 times [2020-10-26 19:31:54,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:54,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [346366059] [2020-10-26 19:31:54,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:54,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:54,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:55,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:55,692 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:00,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:00,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:32:00,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:00,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:32:00,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:00,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:32:00,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:00,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-26 19:32:00,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:00,303 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:00,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:00,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:00,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:00,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:00,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:00,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:00,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:00,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:00,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:00,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:00,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:00,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2020-10-26 19:32:00,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:00,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:00,314 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:00,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:00,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:00,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:00,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:00,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:00,315 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:00,328 INFO L134 CoverageAnalysis]: Checked inductivity of 505 backedges. 2 proven. 477 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:32:00,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [346366059] [2020-10-26 19:32:00,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:00,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:32:00,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164139318] [2020-10-26 19:32:00,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:32:00,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:00,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:32:00,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:32:00,330 INFO L87 Difference]: Start difference. First operand 1486 states and 1975 transitions. Second operand 22 states. [2020-10-26 19:32:00,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:00,566 INFO L93 Difference]: Finished difference Result 1822 states and 2470 transitions. [2020-10-26 19:32:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:32:00,566 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 90 [2020-10-26 19:32:00,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:00,575 INFO L225 Difference]: With dead ends: 1822 [2020-10-26 19:32:00,575 INFO L226 Difference]: Without dead ends: 1731 [2020-10-26 19:32:00,576 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:32:00,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1731 states. [2020-10-26 19:32:00,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1731 to 1633. [2020-10-26 19:32:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1633 states. [2020-10-26 19:32:00,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 2171 transitions. [2020-10-26 19:32:00,645 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 2171 transitions. Word has length 90 [2020-10-26 19:32:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:00,645 INFO L481 AbstractCegarLoop]: Abstraction has 1633 states and 2171 transitions. [2020-10-26 19:32:00,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:32:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 2171 transitions. [2020-10-26 19:32:00,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:32:00,654 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:00,654 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 15, 5, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:00,654 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:32:00,654 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:00,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:00,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1405039854, now seen corresponding path program 5 times [2020-10-26 19:32:00,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:00,655 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567290740] [2020-10-26 19:32:00,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:00,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:00,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:00,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:05,681 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:05,681 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:32:05,682 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:32:05,682 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:32:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:05,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:32:05,682 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:05,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:05,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:05,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:05,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:05,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2020-10-26 19:32:05,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:05,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:05,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:05,999 INFO L134 CoverageAnalysis]: Checked inductivity of 560 backedges. 2 proven. 532 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2020-10-26 19:32:06,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567290740] [2020-10-26 19:32:06,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:06,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:32:06,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715003637] [2020-10-26 19:32:06,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:32:06,001 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:06,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:32:06,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:32:06,001 INFO L87 Difference]: Start difference. First operand 1633 states and 2171 transitions. Second operand 23 states. [2020-10-26 19:32:06,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:06,301 INFO L93 Difference]: Finished difference Result 1969 states and 2666 transitions. [2020-10-26 19:32:06,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:32:06,306 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 93 [2020-10-26 19:32:06,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:06,314 INFO L225 Difference]: With dead ends: 1969 [2020-10-26 19:32:06,314 INFO L226 Difference]: Without dead ends: 1878 [2020-10-26 19:32:06,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:32:06,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1878 states. [2020-10-26 19:32:06,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1878 to 1780. [2020-10-26 19:32:06,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1780 states. [2020-10-26 19:32:06,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1780 states to 1780 states and 2367 transitions. [2020-10-26 19:32:06,366 INFO L78 Accepts]: Start accepts. Automaton has 1780 states and 2367 transitions. Word has length 93 [2020-10-26 19:32:06,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:06,366 INFO L481 AbstractCegarLoop]: Abstraction has 1780 states and 2367 transitions. [2020-10-26 19:32:06,366 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:32:06,366 INFO L276 IsEmpty]: Start isEmpty. Operand 1780 states and 2367 transitions. [2020-10-26 19:32:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-26 19:32:06,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:06,371 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 5, 5, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:06,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:32:06,371 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:06,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:06,372 INFO L82 PathProgramCache]: Analyzing trace with hash -805695970, now seen corresponding path program 6 times [2020-10-26 19:32:06,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:06,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [550093100] [2020-10-26 19:32:06,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:06,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:06,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:11,408 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:11,408 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-10-26 19:32:11,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:11,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:32:11,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:11,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:32:11,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:11,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:32:11,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:11,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:11,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:11,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:11,476 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:11,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:11,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:11,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:11,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:11,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:11,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:11,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:11,478 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2020-10-26 19:32:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:11,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:11,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:11,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:11,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:11,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:32:11,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:11,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:11,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:11,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:11,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:11,489 INFO L134 CoverageAnalysis]: Checked inductivity of 618 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-10-26 19:32:11,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [550093100] [2020-10-26 19:32:11,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:11,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:32:11,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428741451] [2020-10-26 19:32:11,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:32:11,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:11,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:32:11,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:32:11,491 INFO L87 Difference]: Start difference. First operand 1780 states and 2367 transitions. Second operand 9 states. [2020-10-26 19:32:11,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:11,615 INFO L93 Difference]: Finished difference Result 3546 states and 4720 transitions. [2020-10-26 19:32:11,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:32:11,615 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 96 [2020-10-26 19:32:11,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:11,623 INFO L225 Difference]: With dead ends: 3546 [2020-10-26 19:32:11,624 INFO L226 Difference]: Without dead ends: 1783 [2020-10-26 19:32:11,626 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:32:11,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1783 states. [2020-10-26 19:32:11,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1783 to 1782. [2020-10-26 19:32:11,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1782 states. [2020-10-26 19:32:11,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1782 states to 1782 states and 2369 transitions. [2020-10-26 19:32:11,675 INFO L78 Accepts]: Start accepts. Automaton has 1782 states and 2369 transitions. Word has length 96 [2020-10-26 19:32:11,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:11,675 INFO L481 AbstractCegarLoop]: Abstraction has 1782 states and 2369 transitions. [2020-10-26 19:32:11,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:32:11,675 INFO L276 IsEmpty]: Start isEmpty. Operand 1782 states and 2369 transitions. [2020-10-26 19:32:11,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2020-10-26 19:32:11,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:11,680 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:11,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:32:11,680 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:11,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:11,681 INFO L82 PathProgramCache]: Analyzing trace with hash 1199330176, now seen corresponding path program 7 times [2020-10-26 19:32:11,681 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:11,681 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837503410] [2020-10-26 19:32:11,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:11,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:11,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:11,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:12,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:16,717 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:16,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-26 19:32:16,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:16,718 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:32:16,718 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:32:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:16,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:32:16,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:16,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:16,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:16,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:16,796 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2020-10-26 19:32:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:16,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:16,798 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:16,798 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:16,798 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:16,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:32:16,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:16,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:16,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:16,799 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:16,821 INFO L134 CoverageAnalysis]: Checked inductivity of 629 backedges. 2 proven. 36 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-10-26 19:32:16,822 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837503410] [2020-10-26 19:32:16,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:16,822 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:32:16,822 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787431347] [2020-10-26 19:32:16,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:32:16,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:16,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:32:16,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:32:16,823 INFO L87 Difference]: Start difference. First operand 1782 states and 2369 transitions. Second operand 10 states. [2020-10-26 19:32:16,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:16,951 INFO L93 Difference]: Finished difference Result 3548 states and 4722 transitions. [2020-10-26 19:32:16,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:32:16,951 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 98 [2020-10-26 19:32:16,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:16,959 INFO L225 Difference]: With dead ends: 3548 [2020-10-26 19:32:16,959 INFO L226 Difference]: Without dead ends: 1785 [2020-10-26 19:32:16,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:32:16,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1785 states. [2020-10-26 19:32:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1785 to 1784. [2020-10-26 19:32:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1784 states. [2020-10-26 19:32:17,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1784 states to 1784 states and 2371 transitions. [2020-10-26 19:32:17,016 INFO L78 Accepts]: Start accepts. Automaton has 1784 states and 2371 transitions. Word has length 98 [2020-10-26 19:32:17,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:17,016 INFO L481 AbstractCegarLoop]: Abstraction has 1784 states and 2371 transitions. [2020-10-26 19:32:17,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:32:17,016 INFO L276 IsEmpty]: Start isEmpty. Operand 1784 states and 2371 transitions. [2020-10-26 19:32:17,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:32:17,022 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:17,023 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 15, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:17,023 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:32:17,023 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:17,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:17,023 INFO L82 PathProgramCache]: Analyzing trace with hash -410859422, now seen corresponding path program 8 times [2020-10-26 19:32:17,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:17,024 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564863650] [2020-10-26 19:32:17,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:17,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:17,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:17,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:18,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:22,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:22,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:32:22,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:22,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-26 19:32:22,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:32:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:22,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 89 [2020-10-26 19:32:22,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:22,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:22,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:22,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:22,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:22,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:22,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:22,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:22,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:22,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:22,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:22,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:22,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:22,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-26 19:32:22,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:22,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:22,342 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:22,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:22,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:22,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:22,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:22,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:32:22,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:22,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:32:22,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 513 proven. 40 refuted. 0 times theorem prover too weak. 89 trivial. 0 not checked. [2020-10-26 19:32:22,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564863650] [2020-10-26 19:32:22,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:22,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:32:22,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86321112] [2020-10-26 19:32:22,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:32:22,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:22,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:32:22,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=275, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:32:22,366 INFO L87 Difference]: Start difference. First operand 1784 states and 2371 transitions. Second operand 21 states. [2020-10-26 19:32:23,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:23,274 INFO L93 Difference]: Finished difference Result 2157 states and 2878 transitions. [2020-10-26 19:32:23,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:32:23,274 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 100 [2020-10-26 19:32:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:23,285 INFO L225 Difference]: With dead ends: 2157 [2020-10-26 19:32:23,285 INFO L226 Difference]: Without dead ends: 2144 [2020-10-26 19:32:23,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=202, Invalid=350, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:32:23,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2144 states. [2020-10-26 19:32:23,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2144 to 1751. [2020-10-26 19:32:23,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1751 states. [2020-10-26 19:32:23,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1751 states to 1751 states and 2326 transitions. [2020-10-26 19:32:23,350 INFO L78 Accepts]: Start accepts. Automaton has 1751 states and 2326 transitions. Word has length 100 [2020-10-26 19:32:23,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:23,351 INFO L481 AbstractCegarLoop]: Abstraction has 1751 states and 2326 transitions. [2020-10-26 19:32:23,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:32:23,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1751 states and 2326 transitions. [2020-10-26 19:32:23,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2020-10-26 19:32:23,356 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:23,356 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 7, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:23,356 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:32:23,356 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:23,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:23,357 INFO L82 PathProgramCache]: Analyzing trace with hash -805226208, now seen corresponding path program 9 times [2020-10-26 19:32:23,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:23,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88674473] [2020-10-26 19:32:23,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:23,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:23,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:23,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:24,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:32:28,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:28,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:28,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:28,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:28,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:28,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:28,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:28,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:28,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:28,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:28,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:28,479 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2020-10-26 19:32:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:28,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:28,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:28,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:28,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:28,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:28,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:28,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:28,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:28,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:28,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 642 backedges. 2 proven. 49 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2020-10-26 19:32:28,491 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88674473] [2020-10-26 19:32:28,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:28,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:32:28,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618410489] [2020-10-26 19:32:28,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:32:28,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:28,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:32:28,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:32:28,492 INFO L87 Difference]: Start difference. First operand 1751 states and 2326 transitions. Second operand 11 states. [2020-10-26 19:32:28,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:28,645 INFO L93 Difference]: Finished difference Result 3484 states and 4634 transitions. [2020-10-26 19:32:28,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:32:28,646 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 100 [2020-10-26 19:32:28,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:28,654 INFO L225 Difference]: With dead ends: 3484 [2020-10-26 19:32:28,655 INFO L226 Difference]: Without dead ends: 1754 [2020-10-26 19:32:28,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:32:28,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1754 states. [2020-10-26 19:32:28,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1754 to 1753. [2020-10-26 19:32:28,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1753 states. [2020-10-26 19:32:28,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1753 states to 1753 states and 2328 transitions. [2020-10-26 19:32:28,708 INFO L78 Accepts]: Start accepts. Automaton has 1753 states and 2328 transitions. Word has length 100 [2020-10-26 19:32:28,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:28,708 INFO L481 AbstractCegarLoop]: Abstraction has 1753 states and 2328 transitions. [2020-10-26 19:32:28,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:32:28,708 INFO L276 IsEmpty]: Start isEmpty. Operand 1753 states and 2328 transitions. [2020-10-26 19:32:28,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:32:28,713 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:28,713 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 14, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:28,713 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:32:28,714 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:28,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:28,714 INFO L82 PathProgramCache]: Analyzing trace with hash -2009203326, now seen corresponding path program 10 times [2020-10-26 19:32:28,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:28,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1214430408] [2020-10-26 19:32:28,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:28,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:28,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:29,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:33,738 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:33,738 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-26 19:32:33,739 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:33,739 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:32:33,739 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:32:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:33,739 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-26 19:32:33,739 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:34,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:34,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:34,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:34,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:34,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:34,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:34,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:34,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:34,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:34,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:34,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2020-10-26 19:32:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:34,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:34,077 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:34,077 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:34,077 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:34,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:34,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:34,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:34,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:34,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:34,078 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 657 backedges. 2 proven. 590 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-26 19:32:34,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1214430408] [2020-10-26 19:32:34,093 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:34,093 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:32:34,093 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045509583] [2020-10-26 19:32:34,094 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:32:34,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:32:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:32:34,095 INFO L87 Difference]: Start difference. First operand 1753 states and 2328 transitions. Second operand 24 states. [2020-10-26 19:32:34,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:34,345 INFO L93 Difference]: Finished difference Result 2074 states and 2799 transitions. [2020-10-26 19:32:34,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:32:34,345 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 102 [2020-10-26 19:32:34,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:34,356 INFO L225 Difference]: With dead ends: 2074 [2020-10-26 19:32:34,357 INFO L226 Difference]: Without dead ends: 1983 [2020-10-26 19:32:34,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:32:34,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1983 states. [2020-10-26 19:32:34,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1983 to 1891. [2020-10-26 19:32:34,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1891 states. [2020-10-26 19:32:34,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1891 states to 1891 states and 2512 transitions. [2020-10-26 19:32:34,411 INFO L78 Accepts]: Start accepts. Automaton has 1891 states and 2512 transitions. Word has length 102 [2020-10-26 19:32:34,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:34,411 INFO L481 AbstractCegarLoop]: Abstraction has 1891 states and 2512 transitions. [2020-10-26 19:32:34,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:32:34,411 INFO L276 IsEmpty]: Start isEmpty. Operand 1891 states and 2512 transitions. [2020-10-26 19:32:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:32:34,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:34,417 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 14, 8, 8, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:34,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:32:34,417 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:34,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:34,418 INFO L82 PathProgramCache]: Analyzing trace with hash 768247214, now seen corresponding path program 11 times [2020-10-26 19:32:34,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:34,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [54220505] [2020-10-26 19:32:34,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:34,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:34,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:34,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:35,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:39,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:32:39,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:39,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:32:39,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:39,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:32:39,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:39,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:32:39,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:39,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:39,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:39,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:39,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:39,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:39,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:39,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:39,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:39,845 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2020-10-26 19:32:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:39,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:39,847 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:39,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:39,848 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:39,848 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:39,848 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:39,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:39,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:39,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:39,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 718 backedges. 2 proven. 651 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-26 19:32:39,863 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [54220505] [2020-10-26 19:32:39,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:39,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:32:39,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663154100] [2020-10-26 19:32:39,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:32:39,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:32:39,866 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:32:39,866 INFO L87 Difference]: Start difference. First operand 1891 states and 2512 transitions. Second operand 25 states. [2020-10-26 19:32:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:40,189 INFO L93 Difference]: Finished difference Result 2212 states and 2983 transitions. [2020-10-26 19:32:40,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:32:40,189 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 105 [2020-10-26 19:32:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:40,196 INFO L225 Difference]: With dead ends: 2212 [2020-10-26 19:32:40,196 INFO L226 Difference]: Without dead ends: 2121 [2020-10-26 19:32:40,197 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:32:40,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2121 states. [2020-10-26 19:32:40,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2121 to 2029. [2020-10-26 19:32:40,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2029 states. [2020-10-26 19:32:40,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2029 states to 2029 states and 2696 transitions. [2020-10-26 19:32:40,250 INFO L78 Accepts]: Start accepts. Automaton has 2029 states and 2696 transitions. Word has length 105 [2020-10-26 19:32:40,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:40,250 INFO L481 AbstractCegarLoop]: Abstraction has 2029 states and 2696 transitions. [2020-10-26 19:32:40,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:32:40,251 INFO L276 IsEmpty]: Start isEmpty. Operand 2029 states and 2696 transitions. [2020-10-26 19:32:40,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:32:40,256 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:40,256 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 14, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:40,256 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-26 19:32:40,256 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1252326914, now seen corresponding path program 12 times [2020-10-26 19:32:40,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:40,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [94252452] [2020-10-26 19:32:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:40,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:40,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:40,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:41,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:45,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:45,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:32:45,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:45,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:32:45,293 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:45,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:32:45,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:45,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-26 19:32:45,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:45,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:45,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:45,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:45,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:45,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:45,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:45,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:45,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:45,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:45,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:45,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:45,544 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-26 19:32:45,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:45,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:45,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:45,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:45,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:45,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:45,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:32:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:45,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:32:45,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:45,564 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 617 proven. 1 refuted. 0 times theorem prover too weak. 164 trivial. 0 not checked. [2020-10-26 19:32:45,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [94252452] [2020-10-26 19:32:45,565 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:45,565 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:32:45,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263048159] [2020-10-26 19:32:45,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:32:45,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:45,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:32:45,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=237, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:32:45,567 INFO L87 Difference]: Start difference. First operand 2029 states and 2696 transitions. Second operand 20 states. [2020-10-26 19:32:46,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:46,310 INFO L93 Difference]: Finished difference Result 2376 states and 3167 transitions. [2020-10-26 19:32:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:32:46,311 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 108 [2020-10-26 19:32:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:46,317 INFO L225 Difference]: With dead ends: 2376 [2020-10-26 19:32:46,317 INFO L226 Difference]: Without dead ends: 2363 [2020-10-26 19:32:46,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=306, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:32:46,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2363 states. [2020-10-26 19:32:46,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2363 to 1969. [2020-10-26 19:32:46,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1969 states. [2020-10-26 19:32:46,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1969 states to 1969 states and 2615 transitions. [2020-10-26 19:32:46,382 INFO L78 Accepts]: Start accepts. Automaton has 1969 states and 2615 transitions. Word has length 108 [2020-10-26 19:32:46,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:46,383 INFO L481 AbstractCegarLoop]: Abstraction has 1969 states and 2615 transitions. [2020-10-26 19:32:46,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:32:46,383 INFO L276 IsEmpty]: Start isEmpty. Operand 1969 states and 2615 transitions. [2020-10-26 19:32:46,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2020-10-26 19:32:46,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:46,389 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 13, 9, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:46,389 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-26 19:32:46,389 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:46,390 INFO L82 PathProgramCache]: Analyzing trace with hash 2145813252, now seen corresponding path program 13 times [2020-10-26 19:32:46,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:46,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159112041] [2020-10-26 19:32:46,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:46,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:46,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:46,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:47,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 85 [2020-10-26 19:32:51,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:51,811 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:51,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:51,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:51,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:51,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:51,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:32:51,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:51,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:51,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:51,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:51,823 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2020-10-26 19:32:51,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:51,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:51,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:51,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:51,825 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:51,825 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:51,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:51,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:51,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:51,843 INFO L134 CoverageAnalysis]: Checked inductivity of 782 backedges. 2 proven. 715 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2020-10-26 19:32:51,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159112041] [2020-10-26 19:32:51,844 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:51,844 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:32:51,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451459571] [2020-10-26 19:32:51,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:32:51,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:51,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:32:51,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:32:51,846 INFO L87 Difference]: Start difference. First operand 1969 states and 2615 transitions. Second operand 26 states. [2020-10-26 19:32:52,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:52,097 INFO L93 Difference]: Finished difference Result 2275 states and 3062 transitions. [2020-10-26 19:32:52,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:32:52,098 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 108 [2020-10-26 19:32:52,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:52,102 INFO L225 Difference]: With dead ends: 2275 [2020-10-26 19:32:52,102 INFO L226 Difference]: Without dead ends: 2184 [2020-10-26 19:32:52,103 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:32:52,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2184 states. [2020-10-26 19:32:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2184 to 2098. [2020-10-26 19:32:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2098 states. [2020-10-26 19:32:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2098 states to 2098 states and 2787 transitions. [2020-10-26 19:32:52,148 INFO L78 Accepts]: Start accepts. Automaton has 2098 states and 2787 transitions. Word has length 108 [2020-10-26 19:32:52,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:52,149 INFO L481 AbstractCegarLoop]: Abstraction has 2098 states and 2787 transitions. [2020-10-26 19:32:52,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:32:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 2098 states and 2787 transitions. [2020-10-26 19:32:52,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-26 19:32:52,154 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:52,154 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:52,154 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-26 19:32:52,154 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1909651692, now seen corresponding path program 14 times [2020-10-26 19:32:52,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:52,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144264639] [2020-10-26 19:32:52,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:52,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:52,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:52,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:52,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:57,207 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:57,207 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-26 19:32:57,207 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:32:57,207 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-26 19:32:57,207 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:32:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:57,207 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:32:57,208 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:57,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:57,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:57,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:57,310 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:57,310 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:57,310 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:57,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:57,311 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:57,311 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:57,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-26 19:32:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:57,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:57,315 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:57,315 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:32:57,315 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:57,315 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:57,315 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:57,315 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:57,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:32:57,316 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:57,316 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:57,323 INFO L134 CoverageAnalysis]: Checked inductivity of 849 backedges. 2 proven. 64 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-10-26 19:32:57,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144264639] [2020-10-26 19:32:57,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:57,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:32:57,324 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229987932] [2020-10-26 19:32:57,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:32:57,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:57,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:32:57,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:32:57,324 INFO L87 Difference]: Start difference. First operand 2098 states and 2787 transitions. Second operand 12 states. [2020-10-26 19:32:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:57,456 INFO L93 Difference]: Finished difference Result 4176 states and 5554 transitions. [2020-10-26 19:32:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:32:57,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 111 [2020-10-26 19:32:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:57,461 INFO L225 Difference]: With dead ends: 4176 [2020-10-26 19:32:57,461 INFO L226 Difference]: Without dead ends: 2101 [2020-10-26 19:32:57,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:32:57,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2101 states. [2020-10-26 19:32:57,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2101 to 2100. [2020-10-26 19:32:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2100 states. [2020-10-26 19:32:57,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2100 states to 2100 states and 2789 transitions. [2020-10-26 19:32:57,516 INFO L78 Accepts]: Start accepts. Automaton has 2100 states and 2789 transitions. Word has length 111 [2020-10-26 19:32:57,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:57,516 INFO L481 AbstractCegarLoop]: Abstraction has 2100 states and 2789 transitions. [2020-10-26 19:32:57,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:32:57,516 INFO L276 IsEmpty]: Start isEmpty. Operand 2100 states and 2789 transitions. [2020-10-26 19:32:57,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-26 19:32:57,521 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:57,522 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 13, 10, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:57,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-26 19:32:57,522 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:57,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:57,522 INFO L82 PathProgramCache]: Analyzing trace with hash 1890911050, now seen corresponding path program 15 times [2020-10-26 19:32:57,523 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:57,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194997220] [2020-10-26 19:32:57,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:57,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:57,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:57,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:58,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:02,573 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:02,573 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 19:33:02,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:33:02,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:33:02,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:02,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:33:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:33:02,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-26 19:33:02,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:03,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:33:03,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:03,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:03,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:03,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2020-10-26 19:33:03,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:03,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:03,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:33:03,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-26 19:33:03,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:33:03,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-26 19:33:03,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:33:03,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:33:03,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 6 [2020-10-26 19:33:03,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:33:03,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:33:03,038 INFO L134 CoverageAnalysis]: Checked inductivity of 866 backedges. 2 proven. 782 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-26 19:33:03,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194997220] [2020-10-26 19:33:03,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:33:03,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:33:03,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985335806] [2020-10-26 19:33:03,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:33:03,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:33:03,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:33:03,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:33:03,040 INFO L87 Difference]: Start difference. First operand 2100 states and 2789 transitions. Second operand 27 states. [2020-10-26 19:33:03,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:03,302 INFO L93 Difference]: Finished difference Result 2406 states and 3236 transitions. [2020-10-26 19:33:03,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:33:03,302 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 113 [2020-10-26 19:33:03,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:03,307 INFO L225 Difference]: With dead ends: 2406 [2020-10-26 19:33:03,307 INFO L226 Difference]: Without dead ends: 2315 [2020-10-26 19:33:03,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:33:03,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2315 states. [2020-10-26 19:33:03,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2315 to 2229. [2020-10-26 19:33:03,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2229 states. [2020-10-26 19:33:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2229 states to 2229 states and 2961 transitions. [2020-10-26 19:33:03,361 INFO L78 Accepts]: Start accepts. Automaton has 2229 states and 2961 transitions. Word has length 113 [2020-10-26 19:33:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:03,361 INFO L481 AbstractCegarLoop]: Abstraction has 2229 states and 2961 transitions. [2020-10-26 19:33:03,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:33:03,361 INFO L276 IsEmpty]: Start isEmpty. Operand 2229 states and 2961 transitions. [2020-10-26 19:33:03,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-26 19:33:03,366 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:03,367 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 13, 11, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:03,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-26 19:33:03,367 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:03,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:03,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1620331238, now seen corresponding path program 16 times [2020-10-26 19:33:03,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:03,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137994307] [2020-10-26 19:33:03,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:03,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:03,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:33:04,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking...