/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=DEEPEST --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-industry-pattern/array_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 14:46:56,004 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 14:46:56,006 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 14:46:56,043 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 14:46:56,044 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 14:46:56,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 14:46:56,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 14:46:56,049 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 14:46:56,052 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 14:46:56,053 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 14:46:56,054 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 14:46:56,056 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 14:46:56,056 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 14:46:56,058 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 14:46:56,059 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 14:46:56,060 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 14:46:56,062 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 14:46:56,063 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 14:46:56,065 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 14:46:56,067 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 14:46:56,069 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 14:46:56,071 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 14:46:56,073 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 14:46:56,074 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 14:46:56,077 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 14:46:56,078 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 14:46:56,078 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 14:46:56,079 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 14:46:56,080 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 14:46:56,081 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 14:46:56,088 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 14:46:56,089 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 14:46:56,090 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 14:46:56,091 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 [2020-10-27 14:46:56,157 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 14:46:56,157 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 14:46:56,159 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 14:46:56,159 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 14:46:56,159 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 14:46:56,159 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 14:46:56,160 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 14:46:56,160 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 14:46:56,160 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 14:46:56,161 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 14:46:56,161 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 14:46:56,161 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 14:46:56,161 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 14:46:56,162 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 14:46:56,162 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 14:46:56,162 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 14:46:56,162 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 14:46:56,163 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 14:46:56,163 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 14:46:56,163 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 14:46:56,164 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 14:46:56,164 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 14:46:56,164 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 14:46:56,164 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 14:46:56,165 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 14:46:56,165 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 14:46:56,165 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 14:46:56,166 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 14:46:56,166 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 14:46:56,166 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 14:46:56,530 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 14:46:56,557 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 14:46:56,560 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 14:46:56,561 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 14:46:56,562 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 14:46:56,563 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-27 14:46:56,648 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a863d7b2/abdca3fd59314f41bb7ee990a29d7467/FLAG53a585797 [2020-10-27 14:46:57,233 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 14:46:57,235 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_single_elem_init.i [2020-10-27 14:46:57,252 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a863d7b2/abdca3fd59314f41bb7ee990a29d7467/FLAG53a585797 [2020-10-27 14:46:57,581 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1a863d7b2/abdca3fd59314f41bb7ee990a29d7467 [2020-10-27 14:46:57,584 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 14:46:57,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 14:46:57,602 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 14:46:57,603 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 14:46:57,606 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 14:46:57,607 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,612 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4351d0c2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57, skipping insertion in model container [2020-10-27 14:46:57,612 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,621 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 14:46:57,641 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 14:46:57,807 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:46:57,815 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 14:46:57,837 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 14:46:57,854 INFO L208 MainTranslator]: Completed translation [2020-10-27 14:46:57,854 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57 WrapperNode [2020-10-27 14:46:57,855 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 14:46:57,856 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 14:46:57,856 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 14:46:57,856 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 14:46:57,867 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,867 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,875 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,876 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,884 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,891 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (1/1) ... [2020-10-27 14:46:57,894 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 14:46:57,895 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 14:46:57,895 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 14:46:57,895 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 14:46:57,896 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (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 [2020-10-27 14:46:57,977 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 14:46:57,978 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 14:46:57,978 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 14:46:57,979 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-27 14:46:57,979 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 14:46:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 14:46:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 14:46:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 14:46:57,980 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 14:46:57,981 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 14:46:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 14:46:57,982 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 14:46:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 14:46:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 14:46:57,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 14:46:57,984 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 14:46:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 14:46:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 14:46:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 14:46:57,985 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 14:46:58,534 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 14:46:58,534 INFO L298 CfgBuilder]: Removed 2 assume(true) statements. [2020-10-27 14:46:58,536 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:46:58 BoogieIcfgContainer [2020-10-27 14:46:58,536 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 14:46:58,539 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 14:46:58,539 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 14:46:58,543 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 14:46:58,544 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 02:46:57" (1/3) ... [2020-10-27 14:46:58,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f99e738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:46:58, skipping insertion in model container [2020-10-27 14:46:58,545 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 02:46:57" (2/3) ... [2020-10-27 14:46:58,545 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2f99e738 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 02:46:58, skipping insertion in model container [2020-10-27 14:46:58,546 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 02:46:58" (3/3) ... [2020-10-27 14:46:58,548 INFO L111 eAbstractionObserver]: Analyzing ICFG array_single_elem_init.i [2020-10-27 14:46:58,561 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 14:46:58,567 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 14:46:58,581 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 14:46:58,625 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 14:46:58,626 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 14:46:58,626 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 14:46:58,626 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 14:46:58,626 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 14:46:58,626 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 14:46:58,626 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 14:46:58,626 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 14:46:58,652 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-27 14:46:58,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 14:46:58,660 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:58,661 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:58,661 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:58,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:58,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1680670433, now seen corresponding path program 1 times [2020-10-27 14:46:58,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:58,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974506964] [2020-10-27 14:46:58,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:58,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:58,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:58,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:59,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:59,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-27 14:46:59,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:46:59,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 279 [2020-10-27 14:46:59,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:59,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 14:46:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 14:46:59,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 14:46:59,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 14:46:59,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:46:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:59,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:59,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:46:59,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:46:59,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:46:59,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 14:46:59,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:46:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:46:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:46:59,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:46:59,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:46:59,241 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 14:46:59,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974506964] [2020-10-27 14:46:59,244 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 14:46:59,244 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 14:46:59,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026551537] [2020-10-27 14:46:59,250 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 14:46:59,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:46:59,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 14:46:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 14:46:59,268 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 4 states. [2020-10-27 14:46:59,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:46:59,419 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2020-10-27 14:46:59,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 14:46:59,421 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 14:46:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:46:59,429 INFO L225 Difference]: With dead ends: 62 [2020-10-27 14:46:59,430 INFO L226 Difference]: Without dead ends: 35 [2020-10-27 14:46:59,433 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 [2020-10-27 14:46:59,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-27 14:46:59,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 29. [2020-10-27 14:46:59,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-27 14:46:59,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2020-10-27 14:46:59,478 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 16 [2020-10-27 14:46:59,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:46:59,479 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2020-10-27 14:46:59,479 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 14:46:59,479 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2020-10-27 14:46:59,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 14:46:59,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:46:59,481 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:46:59,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 14:46:59,481 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:46:59,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:46:59,482 INFO L82 PathProgramCache]: Analyzing trace with hash -1691183649, now seen corresponding path program 1 times [2020-10-27 14:46:59,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:46:59,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486011815] [2020-10-27 14:46:59,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:46:59,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:46:59,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:59,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:46:59,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:00,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:01,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:01,014 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 14:47:01,014 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 14:47:01,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1463 [2020-10-27 14:47:01,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 14:47:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-27 14:47:01,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 14:47:01,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:01,074 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:01,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:01,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:01,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:01,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:01,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:01,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 14:47:01,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:01,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:01,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:01,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:01,095 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 14:47:01,096 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486011815] [2020-10-27 14:47:01,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:01,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 14:47:01,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110108744] [2020-10-27 14:47:01,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 14:47:01,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:01,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 14:47:01,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 14:47:01,108 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand 5 states. [2020-10-27 14:47:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:01,276 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2020-10-27 14:47:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 14:47:01,277 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-10-27 14:47:01,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:01,278 INFO L225 Difference]: With dead ends: 60 [2020-10-27 14:47:01,278 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 14:47:01,282 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 [2020-10-27 14:47:01,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 14:47:01,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 38. [2020-10-27 14:47:01,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-27 14:47:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 46 transitions. [2020-10-27 14:47:01,292 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 46 transitions. Word has length 24 [2020-10-27 14:47:01,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:01,293 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 46 transitions. [2020-10-27 14:47:01,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 14:47:01,293 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 46 transitions. [2020-10-27 14:47:01,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 14:47:01,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:01,294 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:01,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 14:47:01,295 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:01,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:01,296 INFO L82 PathProgramCache]: Analyzing trace with hash -803454921, now seen corresponding path program 2 times [2020-10-27 14:47:01,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:01,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [599049525] [2020-10-27 14:47:01,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:01,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:01,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:01,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:01,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:01,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:02,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:06,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:06,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 14:47:06,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 14:47:06,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:47:06,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 14:47:06,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-27 14:47:06,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-27 14:47:06,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:06,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:06,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:06,380 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:06,380 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:06,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:06,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:06,381 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:06,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:06,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:06,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:06,382 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:06,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 14:47:06,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [599049525] [2020-10-27 14:47:06,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:06,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 14:47:06,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760755160] [2020-10-27 14:47:06,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 14:47:06,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:06,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 14:47:06,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 14:47:06,390 INFO L87 Difference]: Start difference. First operand 38 states and 46 transitions. Second operand 6 states. [2020-10-27 14:47:06,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:06,529 INFO L93 Difference]: Finished difference Result 72 states and 89 transitions. [2020-10-27 14:47:06,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:47:06,529 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-27 14:47:06,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:06,531 INFO L225 Difference]: With dead ends: 72 [2020-10-27 14:47:06,531 INFO L226 Difference]: Without dead ends: 53 [2020-10-27 14:47:06,532 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 [2020-10-27 14:47:06,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-27 14:47:06,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2020-10-27 14:47:06,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 14:47:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2020-10-27 14:47:06,542 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 32 [2020-10-27 14:47:06,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:06,543 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2020-10-27 14:47:06,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 14:47:06,543 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2020-10-27 14:47:06,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-27 14:47:06,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:06,547 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:06,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 14:47:06,548 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:06,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:06,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1387868639, now seen corresponding path program 3 times [2020-10-27 14:47:06,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:06,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1725051033] [2020-10-27 14:47:06,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:06,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:06,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:06,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:06,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:06,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:06,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:07,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:10,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:10,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,572 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:11,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 14:47:11,572 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 14:47:11,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 14:47:11,573 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:11,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 14:47:11,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 14:47:11,573 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 14:47:11,574 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:11,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:11,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:11,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,643 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:11,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:11,644 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:11,644 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:11,644 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:11,644 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:11,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:11,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:11,650 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 14:47:11,651 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1725051033] [2020-10-27 14:47:11,651 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:11,651 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 14:47:11,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015893492] [2020-10-27 14:47:11,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 14:47:11,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:11,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 14:47:11,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 14:47:11,653 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand 7 states. [2020-10-27 14:47:11,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:11,806 INFO L93 Difference]: Finished difference Result 84 states and 104 transitions. [2020-10-27 14:47:11,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 14:47:11,807 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 40 [2020-10-27 14:47:11,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:11,808 INFO L225 Difference]: With dead ends: 84 [2020-10-27 14:47:11,808 INFO L226 Difference]: Without dead ends: 62 [2020-10-27 14:47:11,809 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 [2020-10-27 14:47:11,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-27 14:47:11,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 56. [2020-10-27 14:47:11,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-27 14:47:11,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 70 transitions. [2020-10-27 14:47:11,817 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 70 transitions. Word has length 40 [2020-10-27 14:47:11,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:11,818 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 70 transitions. [2020-10-27 14:47:11,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 14:47:11,818 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 70 transitions. [2020-10-27 14:47:11,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 14:47:11,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:11,820 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:11,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 14:47:11,820 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:11,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:11,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1545787959, now seen corresponding path program 4 times [2020-10-27 14:47:11,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:11,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303828197] [2020-10-27 14:47:11,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:11,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:11,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:12,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:13,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:14,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:16,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:16,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 14:47:16,859 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 14:47:16,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:47:16,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:16,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 14:47:16,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-27 14:47:16,860 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-27 14:47:16,860 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:16,957 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:16,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:16,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:16,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:16,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:16,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:47:16,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:16,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:16,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:16,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2020-10-27 14:47:16,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303828197] [2020-10-27 14:47:16,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:16,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 14:47:16,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765113438] [2020-10-27 14:47:16,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 14:47:16,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:16,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 14:47:16,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 14:47:16,977 INFO L87 Difference]: Start difference. First operand 56 states and 70 transitions. Second operand 8 states. [2020-10-27 14:47:17,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:17,160 INFO L93 Difference]: Finished difference Result 96 states and 119 transitions. [2020-10-27 14:47:17,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 14:47:17,160 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-27 14:47:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:17,161 INFO L225 Difference]: With dead ends: 96 [2020-10-27 14:47:17,161 INFO L226 Difference]: Without dead ends: 71 [2020-10-27 14:47:17,163 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 [2020-10-27 14:47:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-27 14:47:17,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 65. [2020-10-27 14:47:17,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 14:47:17,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 82 transitions. [2020-10-27 14:47:17,177 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 82 transitions. Word has length 48 [2020-10-27 14:47:17,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:17,177 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 82 transitions. [2020-10-27 14:47:17,177 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 14:47:17,177 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 82 transitions. [2020-10-27 14:47:17,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 14:47:17,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:17,184 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:17,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 14:47:17,185 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:17,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:17,185 INFO L82 PathProgramCache]: Analyzing trace with hash -566161953, now seen corresponding path program 5 times [2020-10-27 14:47:17,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:17,186 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116574430] [2020-10-27 14:47:17,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:17,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:17,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:18,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:20,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:20,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:22,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-27 14:47:22,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:22,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-27 14:47:22,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:47:22,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-27 14:47:22,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 14:47:22,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 14:47:22,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:22,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:22,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:22,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:22,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:47:22,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:22,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:22,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:22,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:22,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:22,356 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2020-10-27 14:47:22,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116574430] [2020-10-27 14:47:22,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:22,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:47:22,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1462354691] [2020-10-27 14:47:22,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:47:22,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:22,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:47:22,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:47:22,361 INFO L87 Difference]: Start difference. First operand 65 states and 82 transitions. Second operand 9 states. [2020-10-27 14:47:22,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:22,529 INFO L93 Difference]: Finished difference Result 108 states and 134 transitions. [2020-10-27 14:47:22,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 14:47:22,530 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 56 [2020-10-27 14:47:22,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:22,533 INFO L225 Difference]: With dead ends: 108 [2020-10-27 14:47:22,533 INFO L226 Difference]: Without dead ends: 80 [2020-10-27 14:47:22,534 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 [2020-10-27 14:47:22,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-27 14:47:22,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 74. [2020-10-27 14:47:22,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 14:47:22,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-10-27 14:47:22,547 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 56 [2020-10-27 14:47:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:22,548 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-10-27 14:47:22,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:47:22,548 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-10-27 14:47:22,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 14:47:22,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:22,552 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:22,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 14:47:22,553 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:22,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:22,553 INFO L82 PathProgramCache]: Analyzing trace with hash -445369289, now seen corresponding path program 6 times [2020-10-27 14:47:22,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:22,554 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489790509] [2020-10-27 14:47:22,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:22,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:22,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:22,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:23,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:25,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:25,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:27,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:27,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 14:47:27,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:27,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:47:27,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 14:47:27,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-27 14:47:27,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 14:47:27,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:27,700 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:27,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:27,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:27,706 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:27,706 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:27,707 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:27,707 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:47:27,707 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:27,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:27,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:27,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:27,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:27,716 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2020-10-27 14:47:27,716 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489790509] [2020-10-27 14:47:27,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:27,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 14:47:27,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285010075] [2020-10-27 14:47:27,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 14:47:27,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:27,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 14:47:27,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 14:47:27,720 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 10 states. [2020-10-27 14:47:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:27,933 INFO L93 Difference]: Finished difference Result 120 states and 149 transitions. [2020-10-27 14:47:27,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 14:47:27,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 64 [2020-10-27 14:47:27,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:27,935 INFO L225 Difference]: With dead ends: 120 [2020-10-27 14:47:27,936 INFO L226 Difference]: Without dead ends: 89 [2020-10-27 14:47:27,937 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 [2020-10-27 14:47:27,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-27 14:47:27,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 83. [2020-10-27 14:47:27,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 14:47:27,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 106 transitions. [2020-10-27 14:47:27,956 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 106 transitions. Word has length 64 [2020-10-27 14:47:27,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:27,956 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 106 transitions. [2020-10-27 14:47:27,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 14:47:27,957 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 106 transitions. [2020-10-27 14:47:27,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 14:47:27,958 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:27,958 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:27,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 14:47:27,958 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:27,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:27,959 INFO L82 PathProgramCache]: Analyzing trace with hash -212194849, now seen corresponding path program 7 times [2020-10-27 14:47:27,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:27,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [448793309] [2020-10-27 14:47:27,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:27,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:27,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:28,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:30,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:31,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:31,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:31,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:32,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:32,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 14:47:32,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:47:32,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:47:32,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:32,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 14:47:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-27 14:47:32,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 14:47:32,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:33,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:33,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:33,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:33,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:33,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:47:33,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:33,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:33,129 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:33,137 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-27 14:47:33,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [448793309] [2020-10-27 14:47:33,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:33,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 14:47:33,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197189901] [2020-10-27 14:47:33,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 14:47:33,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:33,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 14:47:33,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 14:47:33,140 INFO L87 Difference]: Start difference. First operand 83 states and 106 transitions. Second operand 11 states. [2020-10-27 14:47:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:33,380 INFO L93 Difference]: Finished difference Result 132 states and 164 transitions. [2020-10-27 14:47:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 14:47:33,381 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 72 [2020-10-27 14:47:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:33,382 INFO L225 Difference]: With dead ends: 132 [2020-10-27 14:47:33,382 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 14:47:33,383 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 [2020-10-27 14:47:33,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 14:47:33,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 92. [2020-10-27 14:47:33,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 14:47:33,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 118 transitions. [2020-10-27 14:47:33,398 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 118 transitions. Word has length 72 [2020-10-27 14:47:33,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:33,402 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 118 transitions. [2020-10-27 14:47:33,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 14:47:33,402 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 118 transitions. [2020-10-27 14:47:33,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-27 14:47:33,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:33,403 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:33,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 14:47:33,403 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:33,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:33,404 INFO L82 PathProgramCache]: Analyzing trace with hash -461353417, now seen corresponding path program 8 times [2020-10-27 14:47:33,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:33,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145078221] [2020-10-27 14:47:33,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:33,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:33,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:33,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:34,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:38,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:38,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-27 14:47:38,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:38,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 14:47:38,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:38,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 14:47:38,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-27 14:47:38,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-27 14:47:38,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:38,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:38,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:38,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:38,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:38,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:38,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:38,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:47:38,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:38,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:38,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:38,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:38,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:38,580 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2020-10-27 14:47:38,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145078221] [2020-10-27 14:47:38,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:38,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 14:47:38,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138173083] [2020-10-27 14:47:38,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 14:47:38,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:38,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 14:47:38,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:47:38,588 INFO L87 Difference]: Start difference. First operand 92 states and 118 transitions. Second operand 12 states. [2020-10-27 14:47:38,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:38,923 INFO L93 Difference]: Finished difference Result 144 states and 179 transitions. [2020-10-27 14:47:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 14:47:38,924 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 80 [2020-10-27 14:47:38,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:38,925 INFO L225 Difference]: With dead ends: 144 [2020-10-27 14:47:38,925 INFO L226 Difference]: Without dead ends: 107 [2020-10-27 14:47:38,926 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 [2020-10-27 14:47:38,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-27 14:47:38,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 101. [2020-10-27 14:47:38,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-27 14:47:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 130 transitions. [2020-10-27 14:47:38,934 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 130 transitions. Word has length 80 [2020-10-27 14:47:38,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:38,934 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 130 transitions. [2020-10-27 14:47:38,934 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 14:47:38,935 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 130 transitions. [2020-10-27 14:47:38,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-27 14:47:38,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:38,936 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:38,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 14:47:38,936 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:38,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:38,937 INFO L82 PathProgramCache]: Analyzing trace with hash -611023393, now seen corresponding path program 9 times [2020-10-27 14:47:38,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:38,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706262962] [2020-10-27 14:47:38,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:38,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:38,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:38,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,073 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:39,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:40,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:43,968 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:43,969 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 98 [2020-10-27 14:47:43,969 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 14:47:43,969 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:47:43,969 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 14:47:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-27 14:47:43,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 14:47:43,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:44,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:44,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:44,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:44,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:44,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:44,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:44,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:44,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:44,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 14:47:44,189 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 189 trivial. 0 not checked. [2020-10-27 14:47:44,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706262962] [2020-10-27 14:47:44,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:44,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 14:47:44,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529067802] [2020-10-27 14:47:44,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 14:47:44,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:44,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 14:47:44,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 14:47:44,192 INFO L87 Difference]: Start difference. First operand 101 states and 130 transitions. Second operand 13 states. [2020-10-27 14:47:44,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:44,512 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-10-27 14:47:44,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 14:47:44,512 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 88 [2020-10-27 14:47:44,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:44,513 INFO L225 Difference]: With dead ends: 156 [2020-10-27 14:47:44,513 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 14:47:44,515 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 [2020-10-27 14:47:44,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 14:47:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 110. [2020-10-27 14:47:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-27 14:47:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 142 transitions. [2020-10-27 14:47:44,530 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 142 transitions. Word has length 88 [2020-10-27 14:47:44,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:44,530 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 142 transitions. [2020-10-27 14:47:44,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 14:47:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 142 transitions. [2020-10-27 14:47:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2020-10-27 14:47:44,532 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:44,536 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:44,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 14:47:44,536 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:44,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:44,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1112070089, now seen corresponding path program 10 times [2020-10-27 14:47:44,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:44,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [142167207] [2020-10-27 14:47:44,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:44,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:44,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:44,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:46,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:47,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:49,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:49,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 106 [2020-10-27 14:47:49,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:47:49,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:47:49,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:49,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 14:47:49,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-27 14:47:49,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 14:47:49,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:49,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:49,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:49,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:49,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:49,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:49,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:49,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:47:49,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:49,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:49,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 390 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 235 trivial. 0 not checked. [2020-10-27 14:47:49,765 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [142167207] [2020-10-27 14:47:49,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:49,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 14:47:49,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156460910] [2020-10-27 14:47:49,766 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 14:47:49,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:49,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 14:47:49,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 14:47:49,767 INFO L87 Difference]: Start difference. First operand 110 states and 142 transitions. Second operand 14 states. [2020-10-27 14:47:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:50,079 INFO L93 Difference]: Finished difference Result 168 states and 209 transitions. [2020-10-27 14:47:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 14:47:50,079 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 96 [2020-10-27 14:47:50,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:50,081 INFO L225 Difference]: With dead ends: 168 [2020-10-27 14:47:50,081 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 14:47:50,082 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 [2020-10-27 14:47:50,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 14:47:50,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 119. [2020-10-27 14:47:50,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 14:47:50,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 154 transitions. [2020-10-27 14:47:50,088 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 154 transitions. Word has length 96 [2020-10-27 14:47:50,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:50,089 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 154 transitions. [2020-10-27 14:47:50,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 14:47:50,089 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 154 transitions. [2020-10-27 14:47:50,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2020-10-27 14:47:50,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:50,090 INFO L422 BasicCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:50,091 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 14:47:50,091 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:50,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:50,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1954554335, now seen corresponding path program 11 times [2020-10-27 14:47:50,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:50,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800073839] [2020-10-27 14:47:50,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:50,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:50,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:50,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:51,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:51,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:55,126 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 114 [2020-10-27 14:47:55,126 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:47:55,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:47:55,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:55,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 14:47:55,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 68 [2020-10-27 14:47:55,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 14:47:55,127 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:55,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:47:55,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:55,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:47:55,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:47:55,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:47:55,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:47:55,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:47:55,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:47:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:47:55,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:47:55,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:47:55,352 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 286 trivial. 0 not checked. [2020-10-27 14:47:55,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800073839] [2020-10-27 14:47:55,352 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:47:55,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 14:47:55,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250582311] [2020-10-27 14:47:55,353 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 14:47:55,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:47:55,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 14:47:55,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 14:47:55,354 INFO L87 Difference]: Start difference. First operand 119 states and 154 transitions. Second operand 15 states. [2020-10-27 14:47:55,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:47:55,741 INFO L93 Difference]: Finished difference Result 180 states and 224 transitions. [2020-10-27 14:47:55,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 14:47:55,742 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 104 [2020-10-27 14:47:55,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:47:55,744 INFO L225 Difference]: With dead ends: 180 [2020-10-27 14:47:55,744 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 14:47:55,745 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 [2020-10-27 14:47:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 14:47:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2020-10-27 14:47:55,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-27 14:47:55,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 166 transitions. [2020-10-27 14:47:55,756 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 166 transitions. Word has length 104 [2020-10-27 14:47:55,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:47:55,757 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 166 transitions. [2020-10-27 14:47:55,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 14:47:55,757 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 166 transitions. [2020-10-27 14:47:55,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-27 14:47:55,758 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:47:55,758 INFO L422 BasicCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:47:55,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 14:47:55,759 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:47:55,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:47:55,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1048001993, now seen corresponding path program 12 times [2020-10-27 14:47:55,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:47:55,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150612069] [2020-10-27 14:47:55,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:47:55,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:47:55,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:55,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:56,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:56,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:56,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:56,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:56,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:56,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:56,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:47:58,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:00,805 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:00,806 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-27 14:48:00,806 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:48:00,806 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 14:48:00,806 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:00,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 14:48:00,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-27 14:48:00,806 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 14:48:00,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:01,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:01,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:01,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:01,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:01,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:01,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:01,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:01,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:01,035 INFO L134 CoverageAnalysis]: Checked inductivity of 564 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 342 trivial. 0 not checked. [2020-10-27 14:48:01,036 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150612069] [2020-10-27 14:48:01,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:01,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 14:48:01,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812515524] [2020-10-27 14:48:01,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 14:48:01,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:01,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 14:48:01,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 14:48:01,038 INFO L87 Difference]: Start difference. First operand 128 states and 166 transitions. Second operand 16 states. [2020-10-27 14:48:01,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:01,400 INFO L93 Difference]: Finished difference Result 192 states and 239 transitions. [2020-10-27 14:48:01,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 14:48:01,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 112 [2020-10-27 14:48:01,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:01,402 INFO L225 Difference]: With dead ends: 192 [2020-10-27 14:48:01,402 INFO L226 Difference]: Without dead ends: 143 [2020-10-27 14:48:01,404 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 [2020-10-27 14:48:01,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-27 14:48:01,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 137. [2020-10-27 14:48:01,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-27 14:48:01,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 178 transitions. [2020-10-27 14:48:01,414 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 178 transitions. Word has length 112 [2020-10-27 14:48:01,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:01,415 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 178 transitions. [2020-10-27 14:48:01,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 14:48:01,415 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 178 transitions. [2020-10-27 14:48:01,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2020-10-27 14:48:01,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:01,416 INFO L422 BasicCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:01,416 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 14:48:01,417 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:01,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:01,417 INFO L82 PathProgramCache]: Analyzing trace with hash 799866335, now seen corresponding path program 13 times [2020-10-27 14:48:01,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:01,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1655059548] [2020-10-27 14:48:01,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:01,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:01,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:01,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:03,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:03,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:04,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:06,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:06,451 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-27 14:48:06,451 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-27 14:48:06,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:48:06,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:06,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 14:48:06,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 78 [2020-10-27 14:48:06,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 14:48:06,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:06,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:06,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:06,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:06,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:06,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:06,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:06,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 663 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 403 trivial. 0 not checked. [2020-10-27 14:48:06,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1655059548] [2020-10-27 14:48:06,699 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:06,699 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 14:48:06,699 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612505988] [2020-10-27 14:48:06,699 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 14:48:06,700 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:06,700 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 14:48:06,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:48:06,701 INFO L87 Difference]: Start difference. First operand 137 states and 178 transitions. Second operand 17 states. [2020-10-27 14:48:07,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:07,125 INFO L93 Difference]: Finished difference Result 204 states and 254 transitions. [2020-10-27 14:48:07,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 14:48:07,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 120 [2020-10-27 14:48:07,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:07,133 INFO L225 Difference]: With dead ends: 204 [2020-10-27 14:48:07,133 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 14:48:07,134 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 14:48:07,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 14:48:07,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 146. [2020-10-27 14:48:07,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 14:48:07,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 190 transitions. [2020-10-27 14:48:07,144 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 190 transitions. Word has length 120 [2020-10-27 14:48:07,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:07,145 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 190 transitions. [2020-10-27 14:48:07,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 14:48:07,145 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 190 transitions. [2020-10-27 14:48:07,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2020-10-27 14:48:07,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:07,147 INFO L422 BasicCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:07,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 14:48:07,147 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:07,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:07,148 INFO L82 PathProgramCache]: Analyzing trace with hash 744823863, now seen corresponding path program 14 times [2020-10-27 14:48:07,148 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:07,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [738624004] [2020-10-27 14:48:07,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:07,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:07,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:07,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:08,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:08,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:12,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:12,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 138 [2020-10-27 14:48:12,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-27 14:48:12,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 14:48:12,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:12,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 14:48:12,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 83 [2020-10-27 14:48:12,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 14:48:12,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:12,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:12,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:12,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:12,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:12,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:12,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:12,450 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:48:12,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:12,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:12,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:12,464 INFO L134 CoverageAnalysis]: Checked inductivity of 770 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2020-10-27 14:48:12,465 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [738624004] [2020-10-27 14:48:12,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:12,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 14:48:12,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138240463] [2020-10-27 14:48:12,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 14:48:12,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:12,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 14:48:12,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:48:12,467 INFO L87 Difference]: Start difference. First operand 146 states and 190 transitions. Second operand 18 states. [2020-10-27 14:48:12,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:12,910 INFO L93 Difference]: Finished difference Result 216 states and 269 transitions. [2020-10-27 14:48:12,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 14:48:12,911 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 128 [2020-10-27 14:48:12,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:12,913 INFO L225 Difference]: With dead ends: 216 [2020-10-27 14:48:12,914 INFO L226 Difference]: Without dead ends: 161 [2020-10-27 14:48:12,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 14:48:12,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-27 14:48:12,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 155. [2020-10-27 14:48:12,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 14:48:12,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 202 transitions. [2020-10-27 14:48:12,927 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 202 transitions. Word has length 128 [2020-10-27 14:48:12,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:12,928 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 202 transitions. [2020-10-27 14:48:12,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 14:48:12,928 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 202 transitions. [2020-10-27 14:48:12,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2020-10-27 14:48:12,929 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:12,930 INFO L422 BasicCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:12,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 14:48:12,930 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:12,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:12,930 INFO L82 PathProgramCache]: Analyzing trace with hash 313203167, now seen corresponding path program 15 times [2020-10-27 14:48:12,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:12,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919833245] [2020-10-27 14:48:12,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:12,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:13,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:14,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:14,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:15,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:15,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:15,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:15,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:16,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:16,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:17,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:17,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 146 [2020-10-27 14:48:17,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-27 14:48:17,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 14:48:17,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:17,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 14:48:17,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 88 [2020-10-27 14:48:17,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 14:48:17,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:18,255 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:18,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:18,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:18,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:18,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:18,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:18,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:18,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:18,263 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:18,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:18,264 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:18,288 INFO L134 CoverageAnalysis]: Checked inductivity of 885 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2020-10-27 14:48:18,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919833245] [2020-10-27 14:48:18,289 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:18,289 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 14:48:18,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452820542] [2020-10-27 14:48:18,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 14:48:18,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:18,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 14:48:18,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:48:18,291 INFO L87 Difference]: Start difference. First operand 155 states and 202 transitions. Second operand 19 states. [2020-10-27 14:48:18,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:18,829 INFO L93 Difference]: Finished difference Result 228 states and 284 transitions. [2020-10-27 14:48:18,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 14:48:18,829 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 136 [2020-10-27 14:48:18,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:18,831 INFO L225 Difference]: With dead ends: 228 [2020-10-27 14:48:18,831 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 14:48:18,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 14:48:18,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 14:48:18,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 164. [2020-10-27 14:48:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-27 14:48:18,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 214 transitions. [2020-10-27 14:48:18,840 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 214 transitions. Word has length 136 [2020-10-27 14:48:18,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:18,841 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 214 transitions. [2020-10-27 14:48:18,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 14:48:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 214 transitions. [2020-10-27 14:48:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 14:48:18,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:18,843 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:18,843 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 14:48:18,843 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:18,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:18,844 INFO L82 PathProgramCache]: Analyzing trace with hash 649868855, now seen corresponding path program 16 times [2020-10-27 14:48:18,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:18,844 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1409193634] [2020-10-27 14:48:18,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:18,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:18,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:18,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:19,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:19,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:19,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:19,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:19,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:19,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:19,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:19,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:21,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:21,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:21,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:22,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:23,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:23,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:23,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 14:48:23,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 14:48:23,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-27 14:48:23,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 14:48:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 58 [2020-10-27 14:48:23,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-27 14:48:23,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:24,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:24,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:24,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:24,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:24,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:24,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:24,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:48:24,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:24,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:24,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:24,458 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 356 proven. 2 refuted. 0 times theorem prover too weak. 650 trivial. 0 not checked. [2020-10-27 14:48:24,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1409193634] [2020-10-27 14:48:24,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:24,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 14:48:24,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001052606] [2020-10-27 14:48:24,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 14:48:24,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:24,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 14:48:24,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 14:48:24,461 INFO L87 Difference]: Start difference. First operand 164 states and 214 transitions. Second operand 9 states. [2020-10-27 14:48:24,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:24,886 INFO L93 Difference]: Finished difference Result 381 states and 510 transitions. [2020-10-27 14:48:24,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 14:48:24,886 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 144 [2020-10-27 14:48:24,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:24,890 INFO L225 Difference]: With dead ends: 381 [2020-10-27 14:48:24,890 INFO L226 Difference]: Without dead ends: 228 [2020-10-27 14:48:24,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2020-10-27 14:48:24,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-27 14:48:24,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 196. [2020-10-27 14:48:24,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 196 states. [2020-10-27 14:48:24,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 246 transitions. [2020-10-27 14:48:24,902 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 246 transitions. Word has length 144 [2020-10-27 14:48:24,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:24,902 INFO L481 AbstractCegarLoop]: Abstraction has 196 states and 246 transitions. [2020-10-27 14:48:24,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 14:48:24,902 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 246 transitions. [2020-10-27 14:48:24,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2020-10-27 14:48:24,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:24,904 INFO L422 BasicCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:24,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 14:48:24,904 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:24,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:24,905 INFO L82 PathProgramCache]: Analyzing trace with hash -320689097, now seen corresponding path program 1 times [2020-10-27 14:48:24,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:24,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843980030] [2020-10-27 14:48:24,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:24,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:25,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:29,283 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:29,283 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 154 [2020-10-27 14:48:29,283 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:29,283 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4355 [2020-10-27 14:48:29,283 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:29,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 14:48:29,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-27 14:48:29,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 14:48:29,284 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:29,575 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:29,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:29,582 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:29,582 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:29,582 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:29,582 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 14:48:29,582 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:29,582 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:29,583 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:29,583 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:29,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 616 trivial. 0 not checked. [2020-10-27 14:48:29,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843980030] [2020-10-27 14:48:29,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:29,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 14:48:29,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324874937] [2020-10-27 14:48:29,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 14:48:29,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:29,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 14:48:29,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:48:29,601 INFO L87 Difference]: Start difference. First operand 196 states and 246 transitions. Second operand 20 states. [2020-10-27 14:48:30,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:30,080 INFO L93 Difference]: Finished difference Result 276 states and 335 transitions. [2020-10-27 14:48:30,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 14:48:30,081 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 144 [2020-10-27 14:48:30,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:30,083 INFO L225 Difference]: With dead ends: 276 [2020-10-27 14:48:30,083 INFO L226 Difference]: Without dead ends: 215 [2020-10-27 14:48:30,083 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 14:48:30,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-27 14:48:30,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 207. [2020-10-27 14:48:30,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 14:48:30,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 260 transitions. [2020-10-27 14:48:30,095 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 260 transitions. Word has length 144 [2020-10-27 14:48:30,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:30,096 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 260 transitions. [2020-10-27 14:48:30,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 14:48:30,096 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 260 transitions. [2020-10-27 14:48:30,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-27 14:48:30,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:30,098 INFO L422 BasicCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:30,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 14:48:30,098 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:30,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:30,099 INFO L82 PathProgramCache]: Analyzing trace with hash 500816865, now seen corresponding path program 2 times [2020-10-27 14:48:30,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:30,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137009087] [2020-10-27 14:48:30,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:30,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:30,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:30,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:33,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:33,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-27 14:48:33,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3707 [2020-10-27 14:48:33,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:33,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 14:48:33,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 98 [2020-10-27 14:48:33,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 14:48:33,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:34,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:34,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:34,144 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:34,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:34,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:34,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:34,145 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:34,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:34,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:34,145 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:34,145 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:34,166 INFO L134 CoverageAnalysis]: Checked inductivity of 1139 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 697 trivial. 0 not checked. [2020-10-27 14:48:34,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137009087] [2020-10-27 14:48:34,167 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:34,167 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 14:48:34,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896283761] [2020-10-27 14:48:34,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 14:48:34,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:34,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 14:48:34,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:48:34,169 INFO L87 Difference]: Start difference. First operand 207 states and 260 transitions. Second operand 21 states. [2020-10-27 14:48:34,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:34,691 INFO L93 Difference]: Finished difference Result 290 states and 352 transitions. [2020-10-27 14:48:34,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 14:48:34,692 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 152 [2020-10-27 14:48:34,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:34,694 INFO L225 Difference]: With dead ends: 290 [2020-10-27 14:48:34,694 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 14:48:34,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 14:48:34,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 14:48:34,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 218. [2020-10-27 14:48:34,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 218 states. [2020-10-27 14:48:34,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 274 transitions. [2020-10-27 14:48:34,707 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 274 transitions. Word has length 152 [2020-10-27 14:48:34,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:34,707 INFO L481 AbstractCegarLoop]: Abstraction has 218 states and 274 transitions. [2020-10-27 14:48:34,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 14:48:34,707 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 274 transitions. [2020-10-27 14:48:34,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2020-10-27 14:48:34,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:34,709 INFO L422 BasicCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:34,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 14:48:34,710 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:34,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:34,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1838396169, now seen corresponding path program 3 times [2020-10-27 14:48:34,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:34,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1972404010] [2020-10-27 14:48:34,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:34,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:34,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:34,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:39,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:39,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-27 14:48:39,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:39,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4296 [2020-10-27 14:48:39,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:39,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 14:48:39,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 103 [2020-10-27 14:48:39,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 14:48:39,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:39,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:39,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:39,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:39,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:39,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:39,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:39,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:39,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:39,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:39,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:39,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:39,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1278 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 783 trivial. 0 not checked. [2020-10-27 14:48:39,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1972404010] [2020-10-27 14:48:39,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:39,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 14:48:39,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687537901] [2020-10-27 14:48:39,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 14:48:39,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:39,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 14:48:39,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:48:39,413 INFO L87 Difference]: Start difference. First operand 218 states and 274 transitions. Second operand 22 states. [2020-10-27 14:48:39,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:39,967 INFO L93 Difference]: Finished difference Result 304 states and 369 transitions. [2020-10-27 14:48:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 14:48:39,967 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 160 [2020-10-27 14:48:39,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:39,969 INFO L225 Difference]: With dead ends: 304 [2020-10-27 14:48:39,969 INFO L226 Difference]: Without dead ends: 237 [2020-10-27 14:48:39,970 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 14:48:39,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-27 14:48:39,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 229. [2020-10-27 14:48:39,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 14:48:39,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 288 transitions. [2020-10-27 14:48:39,980 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 288 transitions. Word has length 160 [2020-10-27 14:48:39,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:39,980 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 288 transitions. [2020-10-27 14:48:39,980 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 14:48:39,980 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 288 transitions. [2020-10-27 14:48:39,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2020-10-27 14:48:39,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:39,983 INFO L422 BasicCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:39,983 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 14:48:39,983 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:39,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:39,984 INFO L82 PathProgramCache]: Analyzing trace with hash -847776479, now seen corresponding path program 4 times [2020-10-27 14:48:39,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:39,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139433854] [2020-10-27 14:48:39,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:40,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:40,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:45,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 178 [2020-10-27 14:48:45,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:45,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:48:45,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:45,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 14:48:45,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 108 [2020-10-27 14:48:45,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-27 14:48:45,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:45,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:45,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:45,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:45,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:45,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:45,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:45,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:48:45,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:45,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:45,368 INFO L134 CoverageAnalysis]: Checked inductivity of 1425 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 874 trivial. 0 not checked. [2020-10-27 14:48:45,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139433854] [2020-10-27 14:48:45,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:45,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 14:48:45,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438207547] [2020-10-27 14:48:45,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 14:48:45,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:45,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 14:48:45,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:48:45,371 INFO L87 Difference]: Start difference. First operand 229 states and 288 transitions. Second operand 23 states. [2020-10-27 14:48:45,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:45,887 INFO L93 Difference]: Finished difference Result 318 states and 386 transitions. [2020-10-27 14:48:45,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 14:48:45,887 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 168 [2020-10-27 14:48:45,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:45,889 INFO L225 Difference]: With dead ends: 318 [2020-10-27 14:48:45,890 INFO L226 Difference]: Without dead ends: 248 [2020-10-27 14:48:45,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 14:48:45,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-27 14:48:45,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 240. [2020-10-27 14:48:45,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-27 14:48:45,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 302 transitions. [2020-10-27 14:48:45,904 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 302 transitions. Word has length 168 [2020-10-27 14:48:45,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:45,904 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 302 transitions. [2020-10-27 14:48:45,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 14:48:45,904 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 302 transitions. [2020-10-27 14:48:45,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2020-10-27 14:48:45,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:45,907 INFO L422 BasicCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:45,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 14:48:45,908 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:45,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:45,908 INFO L82 PathProgramCache]: Analyzing trace with hash -877978185, now seen corresponding path program 5 times [2020-10-27 14:48:45,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:45,909 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6709129] [2020-10-27 14:48:45,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:45,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:45,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:46,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:50,938 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:50,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 186 [2020-10-27 14:48:50,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:48:50,939 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 14:48:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-27 14:48:50,939 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 14:48:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:51,351 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:51,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:51,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:51,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:51,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:51,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:48:51,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:51,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:51,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:51,377 INFO L134 CoverageAnalysis]: Checked inductivity of 1580 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 970 trivial. 0 not checked. [2020-10-27 14:48:51,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6709129] [2020-10-27 14:48:51,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:51,378 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 14:48:51,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754591788] [2020-10-27 14:48:51,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 14:48:51,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:51,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 14:48:51,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:48:51,380 INFO L87 Difference]: Start difference. First operand 240 states and 302 transitions. Second operand 24 states. [2020-10-27 14:48:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:51,919 INFO L93 Difference]: Finished difference Result 332 states and 403 transitions. [2020-10-27 14:48:51,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 14:48:51,923 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 176 [2020-10-27 14:48:51,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:51,924 INFO L225 Difference]: With dead ends: 332 [2020-10-27 14:48:51,924 INFO L226 Difference]: Without dead ends: 259 [2020-10-27 14:48:51,925 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 14:48:51,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-27 14:48:51,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 251. [2020-10-27 14:48:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 14:48:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 316 transitions. [2020-10-27 14:48:51,935 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 316 transitions. Word has length 176 [2020-10-27 14:48:51,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:51,936 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 316 transitions. [2020-10-27 14:48:51,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 14:48:51,936 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 316 transitions. [2020-10-27 14:48:51,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2020-10-27 14:48:51,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:51,938 INFO L422 BasicCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:51,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 14:48:51,938 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:51,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:51,939 INFO L82 PathProgramCache]: Analyzing trace with hash 602857057, now seen corresponding path program 6 times [2020-10-27 14:48:51,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:51,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1168251428] [2020-10-27 14:48:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:51,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:51,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:52,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:56,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:56,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 194 [2020-10-27 14:48:56,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:48:56,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:48:56,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 14:48:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 118 [2020-10-27 14:48:56,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 14:48:56,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:57,397 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:48:57,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:57,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:57,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:48:57,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:48:57,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:48:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:48:57,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:48:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:48:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:48:57,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:48:57,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:48:57,423 INFO L134 CoverageAnalysis]: Checked inductivity of 1743 backedges. 0 proven. 672 refuted. 0 times theorem prover too weak. 1071 trivial. 0 not checked. [2020-10-27 14:48:57,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1168251428] [2020-10-27 14:48:57,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:48:57,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 14:48:57,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62953622] [2020-10-27 14:48:57,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 14:48:57,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:48:57,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 14:48:57,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:48:57,426 INFO L87 Difference]: Start difference. First operand 251 states and 316 transitions. Second operand 25 states. [2020-10-27 14:48:57,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:48:58,000 INFO L93 Difference]: Finished difference Result 346 states and 420 transitions. [2020-10-27 14:48:58,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 14:48:58,000 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 184 [2020-10-27 14:48:58,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:48:58,002 INFO L225 Difference]: With dead ends: 346 [2020-10-27 14:48:58,003 INFO L226 Difference]: Without dead ends: 270 [2020-10-27 14:48:58,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 14:48:58,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2020-10-27 14:48:58,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 262. [2020-10-27 14:48:58,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 14:48:58,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 330 transitions. [2020-10-27 14:48:58,015 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 330 transitions. Word has length 184 [2020-10-27 14:48:58,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:48:58,016 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 330 transitions. [2020-10-27 14:48:58,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 14:48:58,016 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 330 transitions. [2020-10-27 14:48:58,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-27 14:48:58,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:48:58,018 INFO L422 BasicCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:48:58,018 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 14:48:58,018 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:48:58,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:48:58,019 INFO L82 PathProgramCache]: Analyzing trace with hash 1316691575, now seen corresponding path program 7 times [2020-10-27 14:48:58,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:48:58,019 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549943746] [2020-10-27 14:48:58,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:48:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:48:58,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:48:58,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:03,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:03,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-27 14:49:03,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:03,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:49:03,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 14:49:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 123 [2020-10-27 14:49:03,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 69 [2020-10-27 14:49:03,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:03,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:03,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:03,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:03,624 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:03,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:03,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:03,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:03,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:03,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:03,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:03,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:03,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:03,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1914 backedges. 0 proven. 737 refuted. 0 times theorem prover too weak. 1177 trivial. 0 not checked. [2020-10-27 14:49:03,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549943746] [2020-10-27 14:49:03,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:03,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 14:49:03,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355441346] [2020-10-27 14:49:03,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 14:49:03,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:03,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 14:49:03,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:49:03,662 INFO L87 Difference]: Start difference. First operand 262 states and 330 transitions. Second operand 26 states. [2020-10-27 14:49:04,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:04,267 INFO L93 Difference]: Finished difference Result 360 states and 437 transitions. [2020-10-27 14:49:04,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 14:49:04,268 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 192 [2020-10-27 14:49:04,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:04,271 INFO L225 Difference]: With dead ends: 360 [2020-10-27 14:49:04,271 INFO L226 Difference]: Without dead ends: 281 [2020-10-27 14:49:04,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 14:49:04,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-27 14:49:04,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 273. [2020-10-27 14:49:04,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 273 states. [2020-10-27 14:49:04,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 344 transitions. [2020-10-27 14:49:04,283 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 344 transitions. Word has length 192 [2020-10-27 14:49:04,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:04,284 INFO L481 AbstractCegarLoop]: Abstraction has 273 states and 344 transitions. [2020-10-27 14:49:04,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 14:49:04,284 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 344 transitions. [2020-10-27 14:49:04,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2020-10-27 14:49:04,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:04,286 INFO L422 BasicCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:04,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 14:49:04,286 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:04,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:04,286 INFO L82 PathProgramCache]: Analyzing trace with hash 367171489, now seen corresponding path program 8 times [2020-10-27 14:49:04,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:04,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [850911789] [2020-10-27 14:49:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:04,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:04,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:04,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:09,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:09,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-27 14:49:09,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:09,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:49:09,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:09,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 14:49:09,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 128 [2020-10-27 14:49:09,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-27 14:49:09,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:09,791 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:09,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:09,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:09,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:09,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:09,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:09,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:09,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:09,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:09,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:09,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2093 backedges. 0 proven. 805 refuted. 0 times theorem prover too weak. 1288 trivial. 0 not checked. [2020-10-27 14:49:09,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [850911789] [2020-10-27 14:49:09,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:09,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 14:49:09,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155208756] [2020-10-27 14:49:09,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 14:49:09,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:09,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 14:49:09,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:49:09,838 INFO L87 Difference]: Start difference. First operand 273 states and 344 transitions. Second operand 27 states. [2020-10-27 14:49:10,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:10,526 INFO L93 Difference]: Finished difference Result 374 states and 454 transitions. [2020-10-27 14:49:10,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 14:49:10,527 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 200 [2020-10-27 14:49:10,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:10,529 INFO L225 Difference]: With dead ends: 374 [2020-10-27 14:49:10,530 INFO L226 Difference]: Without dead ends: 292 [2020-10-27 14:49:10,531 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 14:49:10,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-27 14:49:10,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 284. [2020-10-27 14:49:10,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 284 states. [2020-10-27 14:49:10,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 358 transitions. [2020-10-27 14:49:10,542 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 358 transitions. Word has length 200 [2020-10-27 14:49:10,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:10,542 INFO L481 AbstractCegarLoop]: Abstraction has 284 states and 358 transitions. [2020-10-27 14:49:10,542 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 14:49:10,542 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 358 transitions. [2020-10-27 14:49:10,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-27 14:49:10,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:10,544 INFO L422 BasicCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:10,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 14:49:10,544 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash -71807177, now seen corresponding path program 9 times [2020-10-27 14:49:10,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:10,545 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538414698] [2020-10-27 14:49:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:10,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:10,580 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:10,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:15,567 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:15,567 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 14:49:15,567 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:15,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:49:15,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:15,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 14:49:15,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 133 [2020-10-27 14:49:15,568 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 14:49:15,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:16,128 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:16,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:16,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:16,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:16,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:16,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:16,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:16,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:16,136 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:16,178 INFO L134 CoverageAnalysis]: Checked inductivity of 2280 backedges. 0 proven. 876 refuted. 0 times theorem prover too weak. 1404 trivial. 0 not checked. [2020-10-27 14:49:16,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538414698] [2020-10-27 14:49:16,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:16,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 14:49:16,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043511021] [2020-10-27 14:49:16,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 14:49:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 14:49:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:49:16,181 INFO L87 Difference]: Start difference. First operand 284 states and 358 transitions. Second operand 28 states. [2020-10-27 14:49:16,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:16,878 INFO L93 Difference]: Finished difference Result 388 states and 471 transitions. [2020-10-27 14:49:16,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 14:49:16,879 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 208 [2020-10-27 14:49:16,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:16,882 INFO L225 Difference]: With dead ends: 388 [2020-10-27 14:49:16,882 INFO L226 Difference]: Without dead ends: 303 [2020-10-27 14:49:16,883 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 14:49:16,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2020-10-27 14:49:16,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 295. [2020-10-27 14:49:16,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 295 states. [2020-10-27 14:49:16,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 372 transitions. [2020-10-27 14:49:16,895 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 372 transitions. Word has length 208 [2020-10-27 14:49:16,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:16,896 INFO L481 AbstractCegarLoop]: Abstraction has 295 states and 372 transitions. [2020-10-27 14:49:16,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 14:49:16,896 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 372 transitions. [2020-10-27 14:49:16,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2020-10-27 14:49:16,897 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:16,898 INFO L422 BasicCegarLoop]: trace histogram [26, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:16,898 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 14:49:16,898 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:16,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:16,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1929961247, now seen corresponding path program 10 times [2020-10-27 14:49:16,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:16,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2118025346] [2020-10-27 14:49:16,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:16,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:16,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:17,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:21,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:21,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 226 [2020-10-27 14:49:21,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:21,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 14:49:21,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:21,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 14:49:21,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 138 [2020-10-27 14:49:21,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 14:49:21,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:22,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:22,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:22,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:22,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:22,502 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:22,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:22,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:22,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:22,547 INFO L134 CoverageAnalysis]: Checked inductivity of 2475 backedges. 0 proven. 950 refuted. 0 times theorem prover too weak. 1525 trivial. 0 not checked. [2020-10-27 14:49:22,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2118025346] [2020-10-27 14:49:22,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:22,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 14:49:22,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762504271] [2020-10-27 14:49:22,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 14:49:22,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 14:49:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:49:22,550 INFO L87 Difference]: Start difference. First operand 295 states and 372 transitions. Second operand 29 states. [2020-10-27 14:49:23,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:23,230 INFO L93 Difference]: Finished difference Result 402 states and 488 transitions. [2020-10-27 14:49:23,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 14:49:23,230 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 216 [2020-10-27 14:49:23,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:23,232 INFO L225 Difference]: With dead ends: 402 [2020-10-27 14:49:23,232 INFO L226 Difference]: Without dead ends: 314 [2020-10-27 14:49:23,233 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 14:49:23,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2020-10-27 14:49:23,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 306. [2020-10-27 14:49:23,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-27 14:49:23,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 386 transitions. [2020-10-27 14:49:23,245 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 386 transitions. Word has length 216 [2020-10-27 14:49:23,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:23,245 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 386 transitions. [2020-10-27 14:49:23,245 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 14:49:23,245 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 386 transitions. [2020-10-27 14:49:23,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-27 14:49:23,247 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:23,247 INFO L422 BasicCegarLoop]: trace histogram [27, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:23,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 14:49:23,247 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:23,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:23,248 INFO L82 PathProgramCache]: Analyzing trace with hash -1623281673, now seen corresponding path program 11 times [2020-10-27 14:49:23,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:23,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17717099] [2020-10-27 14:49:23,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:23,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:23,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:24,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:28,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:28,286 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 234 [2020-10-27 14:49:28,286 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:28,286 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 14:49:28,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 14:49:28,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 143 [2020-10-27 14:49:28,287 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 14:49:28,287 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:28,917 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:28,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:28,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:28,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:28,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:28,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:49:28,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:28,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:28,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:28,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:28,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:28,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2678 backedges. 0 proven. 1027 refuted. 0 times theorem prover too weak. 1651 trivial. 0 not checked. [2020-10-27 14:49:28,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17717099] [2020-10-27 14:49:28,961 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:28,961 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 14:49:28,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954258931] [2020-10-27 14:49:28,962 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 14:49:28,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:28,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 14:49:28,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:49:28,964 INFO L87 Difference]: Start difference. First operand 306 states and 386 transitions. Second operand 30 states. [2020-10-27 14:49:29,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:29,662 INFO L93 Difference]: Finished difference Result 416 states and 505 transitions. [2020-10-27 14:49:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 14:49:29,662 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 224 [2020-10-27 14:49:29,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:29,664 INFO L225 Difference]: With dead ends: 416 [2020-10-27 14:49:29,664 INFO L226 Difference]: Without dead ends: 325 [2020-10-27 14:49:29,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 14:49:29,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-27 14:49:29,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 317. [2020-10-27 14:49:29,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 317 states. [2020-10-27 14:49:29,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 400 transitions. [2020-10-27 14:49:29,677 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 400 transitions. Word has length 224 [2020-10-27 14:49:29,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:29,677 INFO L481 AbstractCegarLoop]: Abstraction has 317 states and 400 transitions. [2020-10-27 14:49:29,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 14:49:29,677 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 400 transitions. [2020-10-27 14:49:29,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-27 14:49:29,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:29,679 INFO L422 BasicCegarLoop]: trace histogram [28, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:29,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 14:49:29,679 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:29,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:29,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1479509471, now seen corresponding path program 12 times [2020-10-27 14:49:29,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:29,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698539958] [2020-10-27 14:49:29,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:29,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:29,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:30,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:34,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:34,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-27 14:49:34,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:34,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-27 14:49:34,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 14:49:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 148 [2020-10-27 14:49:34,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 84 [2020-10-27 14:49:34,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:35,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:35,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:35,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:35,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:35,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:35,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:35,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:35,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:35,423 INFO L134 CoverageAnalysis]: Checked inductivity of 2889 backedges. 0 proven. 1107 refuted. 0 times theorem prover too weak. 1782 trivial. 0 not checked. [2020-10-27 14:49:35,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698539958] [2020-10-27 14:49:35,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:35,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 14:49:35,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598839209] [2020-10-27 14:49:35,425 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 14:49:35,425 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 14:49:35,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:49:35,426 INFO L87 Difference]: Start difference. First operand 317 states and 400 transitions. Second operand 31 states. [2020-10-27 14:49:36,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:36,247 INFO L93 Difference]: Finished difference Result 430 states and 522 transitions. [2020-10-27 14:49:36,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 14:49:36,247 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 232 [2020-10-27 14:49:36,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:36,251 INFO L225 Difference]: With dead ends: 430 [2020-10-27 14:49:36,251 INFO L226 Difference]: Without dead ends: 336 [2020-10-27 14:49:36,252 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 14:49:36,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2020-10-27 14:49:36,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 328. [2020-10-27 14:49:36,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 328 states. [2020-10-27 14:49:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 414 transitions. [2020-10-27 14:49:36,263 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 414 transitions. Word has length 232 [2020-10-27 14:49:36,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:36,263 INFO L481 AbstractCegarLoop]: Abstraction has 328 states and 414 transitions. [2020-10-27 14:49:36,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 14:49:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 414 transitions. [2020-10-27 14:49:36,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-27 14:49:36,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:36,266 INFO L422 BasicCegarLoop]: trace histogram [29, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:36,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 14:49:36,266 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:36,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash -1343602505, now seen corresponding path program 13 times [2020-10-27 14:49:36,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:36,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315373636] [2020-10-27 14:49:36,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:36,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:36,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 250 [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 153 [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 14:49:41,307 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:41,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:42,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:42,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:42,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:42,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:42,004 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:42,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:42,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:42,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:42,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:42,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:42,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:42,053 INFO L134 CoverageAnalysis]: Checked inductivity of 3108 backedges. 0 proven. 1190 refuted. 0 times theorem prover too weak. 1918 trivial. 0 not checked. [2020-10-27 14:49:42,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315373636] [2020-10-27 14:49:42,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:42,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 14:49:42,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336424681] [2020-10-27 14:49:42,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 14:49:42,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:42,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 14:49:42,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:49:42,055 INFO L87 Difference]: Start difference. First operand 328 states and 414 transitions. Second operand 32 states. [2020-10-27 14:49:42,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:42,891 INFO L93 Difference]: Finished difference Result 444 states and 539 transitions. [2020-10-27 14:49:42,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 14:49:42,891 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 240 [2020-10-27 14:49:42,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:42,895 INFO L225 Difference]: With dead ends: 444 [2020-10-27 14:49:42,895 INFO L226 Difference]: Without dead ends: 347 [2020-10-27 14:49:42,896 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 14:49:42,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347 states. [2020-10-27 14:49:42,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347 to 339. [2020-10-27 14:49:42,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339 states. [2020-10-27 14:49:42,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 428 transitions. [2020-10-27 14:49:42,907 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 428 transitions. Word has length 240 [2020-10-27 14:49:42,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:42,907 INFO L481 AbstractCegarLoop]: Abstraction has 339 states and 428 transitions. [2020-10-27 14:49:42,907 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 14:49:42,908 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 428 transitions. [2020-10-27 14:49:42,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2020-10-27 14:49:42,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:42,909 INFO L422 BasicCegarLoop]: trace histogram [30, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:42,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 14:49:42,910 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:42,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:42,910 INFO L82 PathProgramCache]: Analyzing trace with hash -99441823, now seen corresponding path program 14 times [2020-10-27 14:49:42,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:42,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1929071482] [2020-10-27 14:49:42,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:42,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:42,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:43,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:47,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:47,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 258 [2020-10-27 14:49:47,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:47,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:49:47,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:47,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 14:49:47,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 158 [2020-10-27 14:49:47,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 14:49:47,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:48,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:48,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:48,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:48,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:48,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:48,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:48,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:49:48,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:48,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:48,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:48,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:48,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:48,711 INFO L134 CoverageAnalysis]: Checked inductivity of 3335 backedges. 0 proven. 1276 refuted. 0 times theorem prover too weak. 2059 trivial. 0 not checked. [2020-10-27 14:49:48,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1929071482] [2020-10-27 14:49:48,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:48,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 14:49:48,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169541764] [2020-10-27 14:49:48,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 14:49:48,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:48,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 14:49:48,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:49:48,712 INFO L87 Difference]: Start difference. First operand 339 states and 428 transitions. Second operand 33 states. [2020-10-27 14:49:49,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:49,464 INFO L93 Difference]: Finished difference Result 458 states and 556 transitions. [2020-10-27 14:49:49,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 14:49:49,465 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 248 [2020-10-27 14:49:49,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:49,467 INFO L225 Difference]: With dead ends: 458 [2020-10-27 14:49:49,467 INFO L226 Difference]: Without dead ends: 358 [2020-10-27 14:49:49,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 14:49:49,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-27 14:49:49,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2020-10-27 14:49:49,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 350 states. [2020-10-27 14:49:49,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 442 transitions. [2020-10-27 14:49:49,481 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 442 transitions. Word has length 248 [2020-10-27 14:49:49,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:49,481 INFO L481 AbstractCegarLoop]: Abstraction has 350 states and 442 transitions. [2020-10-27 14:49:49,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 14:49:49,481 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 442 transitions. [2020-10-27 14:49:49,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2020-10-27 14:49:49,483 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:49,483 INFO L422 BasicCegarLoop]: trace histogram [31, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:49,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 14:49:49,483 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:49,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:49,484 INFO L82 PathProgramCache]: Analyzing trace with hash 261554551, now seen corresponding path program 15 times [2020-10-27 14:49:49,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:49,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016597740] [2020-10-27 14:49:49,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:49,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:50,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:54,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:54,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 266 [2020-10-27 14:49:54,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:49:54,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-27 14:49:54,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 14:49:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-27 14:49:54,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 93 [2020-10-27 14:49:54,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:55,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:49:55,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:55,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:55,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:49:55,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:49:55,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:49:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:49:55,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:49:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:49:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:49:55,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:49:55,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:49:55,386 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 1365 refuted. 0 times theorem prover too weak. 2205 trivial. 0 not checked. [2020-10-27 14:49:55,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016597740] [2020-10-27 14:49:55,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:49:55,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 14:49:55,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731502017] [2020-10-27 14:49:55,387 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 14:49:55,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:49:55,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 14:49:55,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:49:55,388 INFO L87 Difference]: Start difference. First operand 350 states and 442 transitions. Second operand 34 states. [2020-10-27 14:49:56,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:49:56,189 INFO L93 Difference]: Finished difference Result 472 states and 573 transitions. [2020-10-27 14:49:56,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 14:49:56,190 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 256 [2020-10-27 14:49:56,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:49:56,194 INFO L225 Difference]: With dead ends: 472 [2020-10-27 14:49:56,194 INFO L226 Difference]: Without dead ends: 369 [2020-10-27 14:49:56,195 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 14:49:56,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2020-10-27 14:49:56,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 361. [2020-10-27 14:49:56,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 361 states. [2020-10-27 14:49:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 361 states to 361 states and 456 transitions. [2020-10-27 14:49:56,207 INFO L78 Accepts]: Start accepts. Automaton has 361 states and 456 transitions. Word has length 256 [2020-10-27 14:49:56,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:49:56,207 INFO L481 AbstractCegarLoop]: Abstraction has 361 states and 456 transitions. [2020-10-27 14:49:56,207 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 14:49:56,208 INFO L276 IsEmpty]: Start isEmpty. Operand 361 states and 456 transitions. [2020-10-27 14:49:56,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2020-10-27 14:49:56,209 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:49:56,209 INFO L422 BasicCegarLoop]: trace histogram [32, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:49:56,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 14:49:56,210 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:49:56,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:49:56,210 INFO L82 PathProgramCache]: Analyzing trace with hash -866018143, now seen corresponding path program 16 times [2020-10-27 14:49:56,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:49:56,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097497731] [2020-10-27 14:49:56,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:49:56,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:49:56,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:49:56,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:01,250 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:01,250 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 274 [2020-10-27 14:50:01,250 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:01,250 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 14:50:01,250 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 14:50:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 168 [2020-10-27 14:50:01,251 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-27 14:50:01,251 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:02,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:02,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:02,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:02,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:02,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 14:50:02,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:02,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:02,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:02,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:02,139 INFO L134 CoverageAnalysis]: Checked inductivity of 3813 backedges. 0 proven. 1457 refuted. 0 times theorem prover too weak. 2356 trivial. 0 not checked. [2020-10-27 14:50:02,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097497731] [2020-10-27 14:50:02,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:02,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 14:50:02,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421791862] [2020-10-27 14:50:02,140 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 14:50:02,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:02,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 14:50:02,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:50:02,141 INFO L87 Difference]: Start difference. First operand 361 states and 456 transitions. Second operand 35 states. [2020-10-27 14:50:03,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:03,087 INFO L93 Difference]: Finished difference Result 486 states and 590 transitions. [2020-10-27 14:50:03,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 14:50:03,087 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 264 [2020-10-27 14:50:03,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:03,090 INFO L225 Difference]: With dead ends: 486 [2020-10-27 14:50:03,091 INFO L226 Difference]: Without dead ends: 380 [2020-10-27 14:50:03,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 14:50:03,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 380 states. [2020-10-27 14:50:03,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 380 to 372. [2020-10-27 14:50:03,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 372 states. [2020-10-27 14:50:03,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 470 transitions. [2020-10-27 14:50:03,104 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 470 transitions. Word has length 264 [2020-10-27 14:50:03,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:03,104 INFO L481 AbstractCegarLoop]: Abstraction has 372 states and 470 transitions. [2020-10-27 14:50:03,104 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 14:50:03,104 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 470 transitions. [2020-10-27 14:50:03,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2020-10-27 14:50:03,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:03,106 INFO L422 BasicCegarLoop]: trace histogram [33, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:03,106 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 14:50:03,107 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash -887033289, now seen corresponding path program 17 times [2020-10-27 14:50:03,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:03,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928625793] [2020-10-27 14:50:03,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:03,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:03,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:03,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:08,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:08,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 282 [2020-10-27 14:50:08,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:08,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-27 14:50:08,154 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:08,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 14:50:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 173 [2020-10-27 14:50:08,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 14:50:08,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:09,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:09,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:09,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:09,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:09,036 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:09,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:09,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:09,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:09,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:09,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:09,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:09,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:09,079 INFO L134 CoverageAnalysis]: Checked inductivity of 4064 backedges. 0 proven. 1552 refuted. 0 times theorem prover too weak. 2512 trivial. 0 not checked. [2020-10-27 14:50:09,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928625793] [2020-10-27 14:50:09,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:09,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 14:50:09,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885885311] [2020-10-27 14:50:09,080 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 14:50:09,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:09,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 14:50:09,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:50:09,081 INFO L87 Difference]: Start difference. First operand 372 states and 470 transitions. Second operand 36 states. [2020-10-27 14:50:09,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:09,998 INFO L93 Difference]: Finished difference Result 500 states and 607 transitions. [2020-10-27 14:50:09,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 14:50:09,999 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 272 [2020-10-27 14:50:09,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:10,001 INFO L225 Difference]: With dead ends: 500 [2020-10-27 14:50:10,001 INFO L226 Difference]: Without dead ends: 391 [2020-10-27 14:50:10,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 14:50:10,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2020-10-27 14:50:10,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 383. [2020-10-27 14:50:10,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-27 14:50:10,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 484 transitions. [2020-10-27 14:50:10,013 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 484 transitions. Word has length 272 [2020-10-27 14:50:10,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:10,013 INFO L481 AbstractCegarLoop]: Abstraction has 383 states and 484 transitions. [2020-10-27 14:50:10,013 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 14:50:10,013 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 484 transitions. [2020-10-27 14:50:10,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2020-10-27 14:50:10,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:10,015 INFO L422 BasicCegarLoop]: trace histogram [34, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:10,015 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 14:50:10,016 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:10,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:10,016 INFO L82 PathProgramCache]: Analyzing trace with hash 1549886945, now seen corresponding path program 18 times [2020-10-27 14:50:10,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:10,017 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [930886898] [2020-10-27 14:50:10,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:10,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:10,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:10,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:15,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:15,061 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 290 [2020-10-27 14:50:15,061 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:15,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-27 14:50:15,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 14:50:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 178 [2020-10-27 14:50:15,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 14:50:15,062 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:15,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:15,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:15,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:15,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:15,983 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:16,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4323 backedges. 0 proven. 1650 refuted. 0 times theorem prover too weak. 2673 trivial. 0 not checked. [2020-10-27 14:50:16,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [930886898] [2020-10-27 14:50:16,026 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:16,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 14:50:16,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785647732] [2020-10-27 14:50:16,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 14:50:16,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:16,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 14:50:16,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:50:16,028 INFO L87 Difference]: Start difference. First operand 383 states and 484 transitions. Second operand 37 states. [2020-10-27 14:50:17,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:17,060 INFO L93 Difference]: Finished difference Result 514 states and 624 transitions. [2020-10-27 14:50:17,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 14:50:17,061 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 280 [2020-10-27 14:50:17,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:17,064 INFO L225 Difference]: With dead ends: 514 [2020-10-27 14:50:17,064 INFO L226 Difference]: Without dead ends: 402 [2020-10-27 14:50:17,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 14:50:17,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2020-10-27 14:50:17,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 394. [2020-10-27 14:50:17,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 394 states. [2020-10-27 14:50:17,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 498 transitions. [2020-10-27 14:50:17,078 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 498 transitions. Word has length 280 [2020-10-27 14:50:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:17,078 INFO L481 AbstractCegarLoop]: Abstraction has 394 states and 498 transitions. [2020-10-27 14:50:17,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 14:50:17,078 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 498 transitions. [2020-10-27 14:50:17,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 289 [2020-10-27 14:50:17,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:17,080 INFO L422 BasicCegarLoop]: trace histogram [35, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:17,081 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 14:50:17,081 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash -630975753, now seen corresponding path program 19 times [2020-10-27 14:50:17,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:17,082 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252396566] [2020-10-27 14:50:17,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:17,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:17,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:17,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:22,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:22,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 298 [2020-10-27 14:50:22,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:22,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 14:50:22,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 14:50:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 183 [2020-10-27 14:50:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 105 [2020-10-27 14:50:22,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:23,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:23,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:23,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:23,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:23,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:23,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:23,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:23,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:23,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:23,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:23,164 INFO L134 CoverageAnalysis]: Checked inductivity of 4590 backedges. 0 proven. 1751 refuted. 0 times theorem prover too weak. 2839 trivial. 0 not checked. [2020-10-27 14:50:23,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252396566] [2020-10-27 14:50:23,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:23,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 14:50:23,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580743815] [2020-10-27 14:50:23,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 14:50:23,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:23,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 14:50:23,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:50:23,167 INFO L87 Difference]: Start difference. First operand 394 states and 498 transitions. Second operand 38 states. [2020-10-27 14:50:24,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:24,233 INFO L93 Difference]: Finished difference Result 528 states and 641 transitions. [2020-10-27 14:50:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 14:50:24,234 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 288 [2020-10-27 14:50:24,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:24,236 INFO L225 Difference]: With dead ends: 528 [2020-10-27 14:50:24,236 INFO L226 Difference]: Without dead ends: 413 [2020-10-27 14:50:24,238 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 14:50:24,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2020-10-27 14:50:24,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 405. [2020-10-27 14:50:24,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 405 states. [2020-10-27 14:50:24,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 512 transitions. [2020-10-27 14:50:24,251 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 512 transitions. Word has length 288 [2020-10-27 14:50:24,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:24,252 INFO L481 AbstractCegarLoop]: Abstraction has 405 states and 512 transitions. [2020-10-27 14:50:24,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 14:50:24,252 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 512 transitions. [2020-10-27 14:50:24,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2020-10-27 14:50:24,254 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:24,254 INFO L422 BasicCegarLoop]: trace histogram [36, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:24,254 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 14:50:24,254 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:24,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:24,255 INFO L82 PathProgramCache]: Analyzing trace with hash 481689377, now seen corresponding path program 20 times [2020-10-27 14:50:24,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:24,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [76098023] [2020-10-27 14:50:24,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:24,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:25,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:29,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:29,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 306 [2020-10-27 14:50:29,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 14:50:29,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 14:50:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 188 [2020-10-27 14:50:29,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 108 [2020-10-27 14:50:29,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:30,329 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:30,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:30,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:30,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:30,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:30,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:30,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:30,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:30,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:30,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:30,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:30,384 INFO L134 CoverageAnalysis]: Checked inductivity of 4865 backedges. 0 proven. 1855 refuted. 0 times theorem prover too weak. 3010 trivial. 0 not checked. [2020-10-27 14:50:30,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [76098023] [2020-10-27 14:50:30,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:30,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 14:50:30,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767552047] [2020-10-27 14:50:30,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 14:50:30,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:30,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 14:50:30,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:50:30,387 INFO L87 Difference]: Start difference. First operand 405 states and 512 transitions. Second operand 39 states. [2020-10-27 14:50:31,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:31,481 INFO L93 Difference]: Finished difference Result 542 states and 658 transitions. [2020-10-27 14:50:31,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 14:50:31,482 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 296 [2020-10-27 14:50:31,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:31,485 INFO L225 Difference]: With dead ends: 542 [2020-10-27 14:50:31,485 INFO L226 Difference]: Without dead ends: 424 [2020-10-27 14:50:31,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 14:50:31,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2020-10-27 14:50:31,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 416. [2020-10-27 14:50:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 416 states. [2020-10-27 14:50:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 526 transitions. [2020-10-27 14:50:31,498 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 526 transitions. Word has length 296 [2020-10-27 14:50:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:31,499 INFO L481 AbstractCegarLoop]: Abstraction has 416 states and 526 transitions. [2020-10-27 14:50:31,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 14:50:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 526 transitions. [2020-10-27 14:50:31,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2020-10-27 14:50:31,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:31,501 INFO L422 BasicCegarLoop]: trace histogram [37, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:31,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 14:50:31,502 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:31,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:31,502 INFO L82 PathProgramCache]: Analyzing trace with hash -532913225, now seen corresponding path program 21 times [2020-10-27 14:50:31,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:31,503 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [442359639] [2020-10-27 14:50:31,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:31,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:31,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:31,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:36,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:36,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 314 [2020-10-27 14:50:36,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 14:50:36,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 14:50:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 193 [2020-10-27 14:50:36,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 111 [2020-10-27 14:50:36,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:37,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:37,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:37,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:37,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:37,627 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:37,627 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 14:50:37,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:37,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:37,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:37,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:37,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:37,676 INFO L134 CoverageAnalysis]: Checked inductivity of 5148 backedges. 0 proven. 1962 refuted. 0 times theorem prover too weak. 3186 trivial. 0 not checked. [2020-10-27 14:50:37,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [442359639] [2020-10-27 14:50:37,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:37,677 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 14:50:37,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052428717] [2020-10-27 14:50:37,677 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 14:50:37,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:37,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 14:50:37,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:50:37,678 INFO L87 Difference]: Start difference. First operand 416 states and 526 transitions. Second operand 40 states. [2020-10-27 14:50:38,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:38,829 INFO L93 Difference]: Finished difference Result 556 states and 675 transitions. [2020-10-27 14:50:38,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 14:50:38,829 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 304 [2020-10-27 14:50:38,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:38,833 INFO L225 Difference]: With dead ends: 556 [2020-10-27 14:50:38,833 INFO L226 Difference]: Without dead ends: 435 [2020-10-27 14:50:38,834 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 14:50:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2020-10-27 14:50:38,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 427. [2020-10-27 14:50:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 427 states. [2020-10-27 14:50:38,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 540 transitions. [2020-10-27 14:50:38,845 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 540 transitions. Word has length 304 [2020-10-27 14:50:38,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:38,846 INFO L481 AbstractCegarLoop]: Abstraction has 427 states and 540 transitions. [2020-10-27 14:50:38,846 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 14:50:38,846 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 540 transitions. [2020-10-27 14:50:38,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 313 [2020-10-27 14:50:38,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:38,848 INFO L422 BasicCegarLoop]: trace histogram [38, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:38,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 14:50:38,849 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:38,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:38,849 INFO L82 PathProgramCache]: Analyzing trace with hash -184326047, now seen corresponding path program 22 times [2020-10-27 14:50:38,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:38,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018563982] [2020-10-27 14:50:38,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:38,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:39,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:43,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:43,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 322 [2020-10-27 14:50:43,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 14:50:43,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-27 14:50:43,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:43,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 14:50:43,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 198 [2020-10-27 14:50:43,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 14:50:43,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:45,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 14:50:45,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:45,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:45,036 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 14:50:45,037 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 14:50:45,037 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 14:50:45,037 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 14:50:45,037 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 14:50:45,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 14:50:45,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 14:50:45,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 14:50:45,038 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 14:50:45,095 INFO L134 CoverageAnalysis]: Checked inductivity of 5439 backedges. 0 proven. 2072 refuted. 0 times theorem prover too weak. 3367 trivial. 0 not checked. [2020-10-27 14:50:45,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018563982] [2020-10-27 14:50:45,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 14:50:45,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 14:50:45,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390989450] [2020-10-27 14:50:45,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 14:50:45,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 14:50:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 14:50:45,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:50:45,097 INFO L87 Difference]: Start difference. First operand 427 states and 540 transitions. Second operand 41 states. [2020-10-27 14:50:46,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 14:50:46,112 INFO L93 Difference]: Finished difference Result 570 states and 692 transitions. [2020-10-27 14:50:46,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 14:50:46,112 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 312 [2020-10-27 14:50:46,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 14:50:46,115 INFO L225 Difference]: With dead ends: 570 [2020-10-27 14:50:46,116 INFO L226 Difference]: Without dead ends: 446 [2020-10-27 14:50:46,119 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 14:50:46,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-27 14:50:46,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 438. [2020-10-27 14:50:46,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 438 states. [2020-10-27 14:50:46,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 438 states to 438 states and 554 transitions. [2020-10-27 14:50:46,130 INFO L78 Accepts]: Start accepts. Automaton has 438 states and 554 transitions. Word has length 312 [2020-10-27 14:50:46,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 14:50:46,131 INFO L481 AbstractCegarLoop]: Abstraction has 438 states and 554 transitions. [2020-10-27 14:50:46,131 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 14:50:46,131 INFO L276 IsEmpty]: Start isEmpty. Operand 438 states and 554 transitions. [2020-10-27 14:50:46,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 321 [2020-10-27 14:50:46,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 14:50:46,133 INFO L422 BasicCegarLoop]: trace histogram [39, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 14:50:46,133 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 14:50:46,133 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 14:50:46,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 14:50:46,134 INFO L82 PathProgramCache]: Analyzing trace with hash -360323977, now seen corresponding path program 23 times [2020-10-27 14:50:46,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 14:50:46,134 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401785119] [2020-10-27 14:50:46,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 14:50:46,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 14:50:46,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 14:50:47,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking...