/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:00:19,709 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:00:19,713 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:00:19,756 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:00:19,757 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:00:19,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:00:19,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:00:19,763 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:00:19,765 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:00:19,766 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:00:19,768 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:00:19,769 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:00:19,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:00:19,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:00:19,773 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:00:19,774 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:00:19,775 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:00:19,777 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:00:19,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:00:19,802 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:00:19,804 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:00:19,806 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:00:19,807 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:00:19,808 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:00:19,812 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:00:19,812 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:00:19,812 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:00:19,814 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:00:19,814 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:00:19,816 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:00:19,816 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:00:19,817 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:00:19,818 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:00:19,819 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:00:19,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:00:19,821 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:00:19,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:00:19,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:00:19,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:00:19,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:00:19,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:00:19,825 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 01:00:19,853 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:00:19,853 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:00:19,855 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:00:19,855 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:00:19,855 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:00:19,855 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:00:19,856 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:00:19,856 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:00:19,856 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:00:19,856 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:00:19,857 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:00:19,857 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:00:19,857 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:00:19,857 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:00:19,857 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:00:19,858 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:00:19,858 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:00:19,858 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:00:19,858 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:00:19,859 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:00:19,859 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:00:19,859 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:00:19,859 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:00:19,859 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:00:19,860 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:00:19,860 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:00:19,860 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:00:19,860 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:00:19,861 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:00:19,861 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:00:20,258 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:00:20,289 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:00:20,293 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:00:20,298 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:00:20,299 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:00:20,301 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2020-10-27 01:00:20,386 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e983ca96/e9aeef715d8b446db7205edf22fce814/FLAG36f92f529 [2020-10-27 01:00:21,080 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:00:21,081 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/float-benchs/zonotope_3.c.p+cfa-reducer.c [2020-10-27 01:00:21,089 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e983ca96/e9aeef715d8b446db7205edf22fce814/FLAG36f92f529 [2020-10-27 01:00:21,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/9e983ca96/e9aeef715d8b446db7205edf22fce814 [2020-10-27 01:00:21,441 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:00:21,449 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:00:21,451 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:00:21,451 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:00:21,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:00:21,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,461 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1e019345 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21, skipping insertion in model container [2020-10-27 01:00:21,461 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,469 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:00:21,512 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:00:21,691 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:00:21,702 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:00:21,731 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:00:21,750 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:00:21,750 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21 WrapperNode [2020-10-27 01:00:21,750 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:00:21,751 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:00:21,751 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:00:21,752 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:00:21,764 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,765 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,774 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,774 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,783 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,786 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,788 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (1/1) ... [2020-10-27 01:00:21,791 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:00:21,792 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:00:21,793 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:00:21,793 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:00:21,794 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (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 01:00:21,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:00:21,859 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:00:21,860 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:00:21,860 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-27 01:00:21,860 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:00:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:00:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:00:21,860 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:00:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:00:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_float [2020-10-27 01:00:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-27 01:00:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-27 01:00:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure f [2020-10-27 01:00:21,861 INFO L130 BoogieDeclarations]: Found specification of procedure g [2020-10-27 01:00:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:00:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:00:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:00:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:00:21,862 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:00:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:00:21,863 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:00:22,350 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:00:22,351 INFO L298 CfgBuilder]: Removed 0 assume(true) statements. [2020-10-27 01:00:22,353 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:00:22 BoogieIcfgContainer [2020-10-27 01:00:22,354 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:00:22,357 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:00:22,357 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:00:22,361 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:00:22,361 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:00:21" (1/3) ... [2020-10-27 01:00:22,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4bd04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:00:22, skipping insertion in model container [2020-10-27 01:00:22,363 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:00:21" (2/3) ... [2020-10-27 01:00:22,363 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f4bd04c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:00:22, skipping insertion in model container [2020-10-27 01:00:22,364 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:00:22" (3/3) ... [2020-10-27 01:00:22,365 INFO L111 eAbstractionObserver]: Analyzing ICFG zonotope_3.c.p+cfa-reducer.c [2020-10-27 01:00:22,382 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:00:22,389 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:00:22,404 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:00:22,446 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:00:22,446 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:00:22,446 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:00:22,446 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:00:22,446 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:00:22,446 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:00:22,447 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:00:22,447 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:00:22,471 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-27 01:00:22,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-27 01:00:22,480 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:22,481 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:22,481 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:22,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:22,490 INFO L82 PathProgramCache]: Analyzing trace with hash -531864736, now seen corresponding path program 1 times [2020-10-27 01:00:22,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:22,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1640325030] [2020-10-27 01:00:22,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:22,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:22,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:22,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:23,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:23,140 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-27 01:00:23,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:00:23,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 477 [2020-10-27 01:00:23,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:00:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:23,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:00:23,143 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:00:23,291 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:23,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:23,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:23,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:23,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:23,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:23,343 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 01:00:23,343 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:23,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:23,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:23,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:23,344 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:23,361 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 01:00:23,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1640325030] [2020-10-27 01:00:23,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:00:23,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:00:23,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276199270] [2020-10-27 01:00:23,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:00:23,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:23,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:00:23,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:00:23,394 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 4 states. [2020-10-27 01:00:23,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:23,527 INFO L93 Difference]: Finished difference Result 45 states and 58 transitions. [2020-10-27 01:00:23,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:00:23,529 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 13 [2020-10-27 01:00:23,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:23,550 INFO L225 Difference]: With dead ends: 45 [2020-10-27 01:00:23,554 INFO L226 Difference]: Without dead ends: 24 [2020-10-27 01:00:23,559 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:00:23,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-27 01:00:23,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 20. [2020-10-27 01:00:23,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-10-27 01:00:23,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 24 transitions. [2020-10-27 01:00:23,623 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 24 transitions. Word has length 13 [2020-10-27 01:00:23,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:23,623 INFO L481 AbstractCegarLoop]: Abstraction has 20 states and 24 transitions. [2020-10-27 01:00:23,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:00:23,624 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 24 transitions. [2020-10-27 01:00:23,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-27 01:00:23,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:23,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:23,626 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:00:23,626 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:23,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:23,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1662091764, now seen corresponding path program 1 times [2020-10-27 01:00:23,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:23,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9205513] [2020-10-27 01:00:23,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:23,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:23,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:23,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:23,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:24,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:24,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-27 01:00:24,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:00:24,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-27 01:00:24,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:24,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:00:24,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:24,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 01:00:24,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:24,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:24,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:24,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:24,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:24,184 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:24,184 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:24,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:00:24,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:24,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:24,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:24,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:24,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:00:24,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:24,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9205513] [2020-10-27 01:00:24,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:24,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:00:24,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329780629] [2020-10-27 01:00:24,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:00:24,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:24,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:00:24,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:00:24,216 INFO L87 Difference]: Start difference. First operand 20 states and 24 transitions. Second operand 5 states. [2020-10-27 01:00:24,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:24,317 INFO L93 Difference]: Finished difference Result 37 states and 47 transitions. [2020-10-27 01:00:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:00:24,318 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 17 [2020-10-27 01:00:24,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:24,319 INFO L225 Difference]: With dead ends: 37 [2020-10-27 01:00:24,319 INFO L226 Difference]: Without dead ends: 29 [2020-10-27 01:00:24,320 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 01:00:24,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-27 01:00:24,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 25. [2020-10-27 01:00:24,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-27 01:00:24,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 31 transitions. [2020-10-27 01:00:24,334 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 31 transitions. Word has length 17 [2020-10-27 01:00:24,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:24,335 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 31 transitions. [2020-10-27 01:00:24,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:00:24,335 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 31 transitions. [2020-10-27 01:00:24,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:00:24,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:24,338 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:24,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:00:24,338 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:24,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:24,339 INFO L82 PathProgramCache]: Analyzing trace with hash -1438828920, now seen corresponding path program 2 times [2020-10-27 01:00:24,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:24,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1834808163] [2020-10-27 01:00:24,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:24,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:24,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:24,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:24,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:24,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:00:24,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:00:24,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 628 [2020-10-27 01:00:24,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:00:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:24,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:00:24,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:25,114 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:25,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:25,129 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:25,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:25,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:25,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 01:00:25,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:25,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:25,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:25,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:25,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:25,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:25,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1834808163] [2020-10-27 01:00:25,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:25,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:00:25,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306012069] [2020-10-27 01:00:25,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:00:25,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:25,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:00:25,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:00:25,142 INFO L87 Difference]: Start difference. First operand 25 states and 31 transitions. Second operand 6 states. [2020-10-27 01:00:25,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:25,249 INFO L93 Difference]: Finished difference Result 42 states and 54 transitions. [2020-10-27 01:00:25,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:00:25,250 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 21 [2020-10-27 01:00:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:25,252 INFO L225 Difference]: With dead ends: 42 [2020-10-27 01:00:25,252 INFO L226 Difference]: Without dead ends: 34 [2020-10-27 01:00:25,252 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 01:00:25,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-27 01:00:25,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 30. [2020-10-27 01:00:25,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-27 01:00:25,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 38 transitions. [2020-10-27 01:00:25,268 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 38 transitions. Word has length 21 [2020-10-27 01:00:25,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:25,269 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 38 transitions. [2020-10-27 01:00:25,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:00:25,269 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 38 transitions. [2020-10-27 01:00:25,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 01:00:25,270 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:25,271 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:25,271 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:00:25,271 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:25,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:25,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1419018524, now seen corresponding path program 3 times [2020-10-27 01:00:25,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:25,272 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503361637] [2020-10-27 01:00:25,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:25,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:25,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:25,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:25,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:25,418 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:25,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:26,159 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:26,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 01:00:26,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:00:26,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 867 [2020-10-27 01:00:26,160 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:26,160 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:00:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:26,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:00:26,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:26,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:26,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:26,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:26,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:26,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:26,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:00:26,259 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:26,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:26,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:26,266 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503361637] [2020-10-27 01:00:26,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:26,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 01:00:26,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725447809] [2020-10-27 01:00:26,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:00:26,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:26,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:00:26,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:00:26,269 INFO L87 Difference]: Start difference. First operand 30 states and 38 transitions. Second operand 7 states. [2020-10-27 01:00:26,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:26,335 INFO L93 Difference]: Finished difference Result 47 states and 61 transitions. [2020-10-27 01:00:26,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:00:26,336 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 25 [2020-10-27 01:00:26,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:26,337 INFO L225 Difference]: With dead ends: 47 [2020-10-27 01:00:26,337 INFO L226 Difference]: Without dead ends: 39 [2020-10-27 01:00:26,338 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 01:00:26,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-27 01:00:26,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 35. [2020-10-27 01:00:26,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-27 01:00:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 45 transitions. [2020-10-27 01:00:26,346 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 45 transitions. Word has length 25 [2020-10-27 01:00:26,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:26,346 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 45 transitions. [2020-10-27 01:00:26,346 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:00:26,346 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 45 transitions. [2020-10-27 01:00:26,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:00:26,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:26,347 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:26,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:00:26,348 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:26,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:26,348 INFO L82 PathProgramCache]: Analyzing trace with hash 375153072, now seen corresponding path program 4 times [2020-10-27 01:00:26,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:26,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362028587] [2020-10-27 01:00:26,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:26,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:26,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:26,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:26,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:26,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:26,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:26,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:27,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:27,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:00:27,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:00:27,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1125 [2020-10-27 01:00:27,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:27,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:00:27,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:27,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 01:00:27,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:00:27,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:27,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:27,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:27,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:27,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:27,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:00:27,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:27,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:27,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:27,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:27,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:27,638 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:27,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362028587] [2020-10-27 01:00:27,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:27,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:00:27,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704504851] [2020-10-27 01:00:27,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:00:27,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:27,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:00:27,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:00:27,642 INFO L87 Difference]: Start difference. First operand 35 states and 45 transitions. Second operand 8 states. [2020-10-27 01:00:27,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:27,740 INFO L93 Difference]: Finished difference Result 52 states and 68 transitions. [2020-10-27 01:00:27,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:00:27,741 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 29 [2020-10-27 01:00:27,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:27,742 INFO L225 Difference]: With dead ends: 52 [2020-10-27 01:00:27,742 INFO L226 Difference]: Without dead ends: 44 [2020-10-27 01:00:27,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:00:27,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-27 01:00:27,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 40. [2020-10-27 01:00:27,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-27 01:00:27,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 52 transitions. [2020-10-27 01:00:27,751 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 52 transitions. Word has length 29 [2020-10-27 01:00:27,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:27,752 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 52 transitions. [2020-10-27 01:00:27,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:00:27,752 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 52 transitions. [2020-10-27 01:00:27,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:00:27,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:27,754 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:27,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:00:27,754 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:27,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:27,755 INFO L82 PathProgramCache]: Analyzing trace with hash -111552444, now seen corresponding path program 5 times [2020-10-27 01:00:27,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:27,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [493081315] [2020-10-27 01:00:27,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:27,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:27,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:27,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:27,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:27,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:27,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:28,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:28,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:29,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:29,906 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:00:29,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:00:29,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2134 [2020-10-27 01:00:29,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:29,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:00:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:29,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:00:29,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:30,033 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:30,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:30,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:30,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:30,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:30,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:00:30,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:30,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:30,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:30,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:30,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:00:30,054 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:30,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [493081315] [2020-10-27 01:00:30,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:30,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:00:30,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043438504] [2020-10-27 01:00:30,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:00:30,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:30,058 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:00:30,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:00:30,059 INFO L87 Difference]: Start difference. First operand 40 states and 52 transitions. Second operand 9 states. [2020-10-27 01:00:30,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:30,159 INFO L93 Difference]: Finished difference Result 57 states and 75 transitions. [2020-10-27 01:00:30,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:00:30,159 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 33 [2020-10-27 01:00:30,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:30,160 INFO L225 Difference]: With dead ends: 57 [2020-10-27 01:00:30,161 INFO L226 Difference]: Without dead ends: 49 [2020-10-27 01:00:30,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:00:30,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-27 01:00:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 45. [2020-10-27 01:00:30,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-27 01:00:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 59 transitions. [2020-10-27 01:00:30,176 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 59 transitions. Word has length 33 [2020-10-27 01:00:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:30,176 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 59 transitions. [2020-10-27 01:00:30,176 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:00:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 59 transitions. [2020-10-27 01:00:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:00:30,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:30,177 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:30,178 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:00:30,178 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:30,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:30,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1663965992, now seen corresponding path program 6 times [2020-10-27 01:00:30,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:30,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [684869290] [2020-10-27 01:00:30,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:30,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:30,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:30,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:30,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:30,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:30,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:30,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:30,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:34,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:34,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:00:34,231 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:00:34,231 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4035 [2020-10-27 01:00:34,231 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:00:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:34,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-27 01:00:34,232 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:34,356 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:34,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:34,367 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:34,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:34,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:34,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:00:34,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:34,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:34,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:34,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:34,376 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [684869290] [2020-10-27 01:00:34,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:34,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:00:34,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622014642] [2020-10-27 01:00:34,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:00:34,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:34,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:00:34,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:00:34,379 INFO L87 Difference]: Start difference. First operand 45 states and 59 transitions. Second operand 10 states. [2020-10-27 01:00:34,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:34,486 INFO L93 Difference]: Finished difference Result 62 states and 82 transitions. [2020-10-27 01:00:34,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:00:34,486 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 37 [2020-10-27 01:00:34,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:34,487 INFO L225 Difference]: With dead ends: 62 [2020-10-27 01:00:34,488 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 01:00:34,488 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:00:34,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 01:00:34,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-27 01:00:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-27 01:00:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 66 transitions. [2020-10-27 01:00:34,496 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 66 transitions. Word has length 37 [2020-10-27 01:00:34,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:34,496 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 66 transitions. [2020-10-27 01:00:34,496 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:00:34,496 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 66 transitions. [2020-10-27 01:00:34,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 01:00:34,497 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:34,498 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:34,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:00:34,498 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:34,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:34,499 INFO L82 PathProgramCache]: Analyzing trace with hash 1971947372, now seen corresponding path program 7 times [2020-10-27 01:00:34,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:34,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528129747] [2020-10-27 01:00:34,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:34,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:34,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:34,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:34,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:34,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:34,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:34,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:34,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:35,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:36,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:39,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:39,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 01:00:39,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:00:39,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:00:39,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:00:39,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:39,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 01:00:39,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:39,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:39,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:39,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:39,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:39,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:39,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:39,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:00:39,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:39,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:39,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:39,664 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:39,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528129747] [2020-10-27 01:00:39,665 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:39,665 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:00:39,665 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1231122767] [2020-10-27 01:00:39,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:00:39,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:39,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:00:39,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:00:39,667 INFO L87 Difference]: Start difference. First operand 50 states and 66 transitions. Second operand 11 states. [2020-10-27 01:00:39,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:39,747 INFO L93 Difference]: Finished difference Result 67 states and 89 transitions. [2020-10-27 01:00:39,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:00:39,748 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 41 [2020-10-27 01:00:39,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:39,749 INFO L225 Difference]: With dead ends: 67 [2020-10-27 01:00:39,749 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:00:39,750 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:00:39,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:00:39,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2020-10-27 01:00:39,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-27 01:00:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2020-10-27 01:00:39,757 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 41 [2020-10-27 01:00:39,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:39,757 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2020-10-27 01:00:39,757 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:00:39,757 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2020-10-27 01:00:39,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:00:39,759 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:39,759 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:39,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:00:39,759 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:39,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:39,760 INFO L82 PathProgramCache]: Analyzing trace with hash 231063552, now seen corresponding path program 8 times [2020-10-27 01:00:39,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:39,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702834019] [2020-10-27 01:00:39,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:39,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:39,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:39,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:39,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:39,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:39,853 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:39,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:40,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:41,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:43,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:44,774 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:44,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:00:44,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-27 01:00:44,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:00:44,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:00:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:44,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:00:44,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:44,919 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:44,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:44,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:44,926 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:44,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:44,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:00:44,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:44,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:44,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:44,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:44,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702834019] [2020-10-27 01:00:44,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:44,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:00:44,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165098021] [2020-10-27 01:00:44,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:00:44,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:44,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:00:44,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:00:44,937 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand 12 states. [2020-10-27 01:00:45,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:45,022 INFO L93 Difference]: Finished difference Result 72 states and 96 transitions. [2020-10-27 01:00:45,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:00:45,023 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 45 [2020-10-27 01:00:45,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:45,024 INFO L225 Difference]: With dead ends: 72 [2020-10-27 01:00:45,024 INFO L226 Difference]: Without dead ends: 64 [2020-10-27 01:00:45,024 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:00:45,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-27 01:00:45,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 60. [2020-10-27 01:00:45,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-27 01:00:45,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 80 transitions. [2020-10-27 01:00:45,031 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 80 transitions. Word has length 45 [2020-10-27 01:00:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:45,032 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 80 transitions. [2020-10-27 01:00:45,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:00:45,032 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 80 transitions. [2020-10-27 01:00:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:00:45,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:45,033 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:45,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:00:45,033 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash 1162579604, now seen corresponding path program 9 times [2020-10-27 01:00:45,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:45,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797758623] [2020-10-27 01:00:45,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:45,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:45,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:45,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:45,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:45,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:45,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:45,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:45,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:46,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:49,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:50,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:00:50,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:00:50,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:00:50,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:50,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:00:50,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:50,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:00:50,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:50,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:50,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:50,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:50,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:50,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:50,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:00:50,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:50,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:50,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:50,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:50,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:50,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797758623] [2020-10-27 01:00:50,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:50,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:00:50,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068300455] [2020-10-27 01:00:50,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:00:50,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:50,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:00:50,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:00:50,225 INFO L87 Difference]: Start difference. First operand 60 states and 80 transitions. Second operand 13 states. [2020-10-27 01:00:50,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:50,326 INFO L93 Difference]: Finished difference Result 77 states and 103 transitions. [2020-10-27 01:00:50,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:00:50,326 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 49 [2020-10-27 01:00:50,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:50,327 INFO L225 Difference]: With dead ends: 77 [2020-10-27 01:00:50,327 INFO L226 Difference]: Without dead ends: 69 [2020-10-27 01:00:50,328 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 01:00:50,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-27 01:00:50,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 65. [2020-10-27 01:00:50,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-27 01:00:50,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 87 transitions. [2020-10-27 01:00:50,335 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 87 transitions. Word has length 49 [2020-10-27 01:00:50,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:50,336 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 87 transitions. [2020-10-27 01:00:50,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:00:50,336 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 87 transitions. [2020-10-27 01:00:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-27 01:00:50,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:50,337 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:50,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:00:50,337 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:50,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:50,338 INFO L82 PathProgramCache]: Analyzing trace with hash -1855982808, now seen corresponding path program 10 times [2020-10-27 01:00:50,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:50,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1521597344] [2020-10-27 01:00:50,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:50,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:50,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:50,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:51,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:52,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,350 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:55,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-27 01:00:55,351 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:00:55,351 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-27 01:00:55,351 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:00:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:00:55,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:00:55,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:55,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:00:55,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:55,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,516 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:00:55,516 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:00:55,516 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:00:55,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:00:55,517 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:00:55,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:00:55,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:00:55,517 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:00:55,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:00:55,526 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:00:55,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1521597344] [2020-10-27 01:00:55,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:00:55,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:00:55,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642885643] [2020-10-27 01:00:55,527 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:00:55,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:00:55,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:00:55,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:00:55,528 INFO L87 Difference]: Start difference. First operand 65 states and 87 transitions. Second operand 14 states. [2020-10-27 01:00:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:00:55,619 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2020-10-27 01:00:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:00:55,620 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-27 01:00:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:00:55,621 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:00:55,621 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:00:55,621 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 01:00:55,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:00:55,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 70. [2020-10-27 01:00:55,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-27 01:00:55,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 94 transitions. [2020-10-27 01:00:55,628 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 94 transitions. Word has length 53 [2020-10-27 01:00:55,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:00:55,629 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 94 transitions. [2020-10-27 01:00:55,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:00:55,629 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 94 transitions. [2020-10-27 01:00:55,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:00:55,630 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:00:55,630 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:00:55,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:00:55,630 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:00:55,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:00:55,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1019735484, now seen corresponding path program 11 times [2020-10-27 01:00:55,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:00:55,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785001141] [2020-10-27 01:00:55,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:00:55,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:00:55,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:55,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:56,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:56,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:00:59,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:00,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:00,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:01:00,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:01:00,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:01:00,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:01:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-27 01:01:00,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:01:00,646 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:00,716 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:00,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:00,723 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:00,723 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:00,723 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:00,723 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:01:00,723 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:00,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:00,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:00,724 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:00,724 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:00,736 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 41 proven. 0 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2020-10-27 01:01:00,737 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785001141] [2020-10-27 01:01:00,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:01:00,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:01:00,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406032458] [2020-10-27 01:01:00,738 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:01:00,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:00,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:01:00,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:01:00,739 INFO L87 Difference]: Start difference. First operand 70 states and 94 transitions. Second operand 4 states. [2020-10-27 01:01:00,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:00,797 INFO L93 Difference]: Finished difference Result 140 states and 186 transitions. [2020-10-27 01:01:00,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:01:00,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-27 01:01:00,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:00,799 INFO L225 Difference]: With dead ends: 140 [2020-10-27 01:01:00,799 INFO L226 Difference]: Without dead ends: 59 [2020-10-27 01:01:00,800 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 01:01:00,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-27 01:01:00,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-27 01:01:00,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-27 01:01:00,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2020-10-27 01:01:00,817 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 57 [2020-10-27 01:01:00,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:00,818 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2020-10-27 01:01:00,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:01:00,818 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2020-10-27 01:01:00,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-27 01:01:00,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:00,819 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:00,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:01:00,820 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:00,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:00,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1710232115, now seen corresponding path program 1 times [2020-10-27 01:01:00,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:00,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269121330] [2020-10-27 01:01:00,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:00,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:00,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:00,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:01,511 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:01,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-27 01:01:01,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:01,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-27 01:01:01,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:01:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:01,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:01:01,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:01,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:01,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:01,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:01,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:01,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:01,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:01,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:01,701 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:01,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:01,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:01,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:01,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:01,710 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:01,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269121330] [2020-10-27 01:01:01,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:01,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:01:01,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463314205] [2020-10-27 01:01:01,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:01:01,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:01,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:01:01,713 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:01:01,713 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand 15 states. [2020-10-27 01:01:01,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:01,803 INFO L93 Difference]: Finished difference Result 74 states and 78 transitions. [2020-10-27 01:01:01,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:01:01,803 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 57 [2020-10-27 01:01:01,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:01,804 INFO L225 Difference]: With dead ends: 74 [2020-10-27 01:01:01,804 INFO L226 Difference]: Without dead ends: 66 [2020-10-27 01:01:01,805 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 01:01:01,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-27 01:01:01,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-10-27 01:01:01,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-27 01:01:01,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2020-10-27 01:01:01,810 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 57 [2020-10-27 01:01:01,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:01,810 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2020-10-27 01:01:01,810 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:01:01,810 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2020-10-27 01:01:01,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:01:01,811 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:01,811 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:01,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:01:01,812 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:01,812 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:01,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1818196108, now seen corresponding path program 2 times [2020-10-27 01:01:01,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:01,813 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [318365693] [2020-10-27 01:01:01,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:01,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:01,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:01,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:02,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:02,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:01:02,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:02,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 684 [2020-10-27 01:01:02,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:02,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:01:02,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:02,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:01:02,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:02,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:02,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:02,728 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:02,729 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:02,729 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:01:02,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:02,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:02,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:02,739 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:02,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [318365693] [2020-10-27 01:01:02,740 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:02,740 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 01:01:02,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844652559] [2020-10-27 01:01:02,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 01:01:02,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:02,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 01:01:02,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:01:02,743 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand 16 states. [2020-10-27 01:01:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:02,841 INFO L93 Difference]: Finished difference Result 78 states and 82 transitions. [2020-10-27 01:01:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:01:02,842 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 61 [2020-10-27 01:01:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:02,843 INFO L225 Difference]: With dead ends: 78 [2020-10-27 01:01:02,843 INFO L226 Difference]: Without dead ends: 70 [2020-10-27 01:01:02,844 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 01:01:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-27 01:01:02,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-27 01:01:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-27 01:01:02,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2020-10-27 01:01:02,855 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 61 [2020-10-27 01:01:02,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:02,856 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2020-10-27 01:01:02,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 01:01:02,856 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2020-10-27 01:01:02,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-27 01:01:02,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:02,857 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:02,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:01:02,857 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:02,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:02,857 INFO L82 PathProgramCache]: Analyzing trace with hash 1167198821, now seen corresponding path program 3 times [2020-10-27 01:01:02,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:02,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1312333543] [2020-10-27 01:01:02,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:02,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:02,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:02,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:03,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:03,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-27 01:01:03,529 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:03,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 650 [2020-10-27 01:01:03,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:03,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:01:03,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:03,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:01:03,530 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:03,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:03,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:03,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:03,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:03,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:03,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:03,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:01:03,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:03,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:03,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:03,754 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:03,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1312333543] [2020-10-27 01:01:03,756 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:03,756 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 01:01:03,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024540655] [2020-10-27 01:01:03,757 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 01:01:03,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:03,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 01:01:03,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:01:03,758 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand 17 states. [2020-10-27 01:01:03,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:03,870 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2020-10-27 01:01:03,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:01:03,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 65 [2020-10-27 01:01:03,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:03,871 INFO L225 Difference]: With dead ends: 82 [2020-10-27 01:01:03,871 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:01:03,872 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 01:01:03,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:01:03,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-27 01:01:03,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:01:03,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2020-10-27 01:01:03,880 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 65 [2020-10-27 01:01:03,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:03,882 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2020-10-27 01:01:03,882 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 01:01:03,882 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2020-10-27 01:01:03,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:01:03,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:03,888 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:03,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:01:03,888 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:03,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:03,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1023805374, now seen corresponding path program 4 times [2020-10-27 01:01:03,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:03,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1965115167] [2020-10-27 01:01:03,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:03,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:03,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:04,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:04,650 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:01:04,650 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:04,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-27 01:01:04,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:04,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 01:01:04,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:04,651 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:01:04,651 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:04,872 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:04,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:04,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:04,886 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:04,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:04,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:01:04,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:04,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:04,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:04,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:04,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:04,899 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:04,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1965115167] [2020-10-27 01:01:04,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:04,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 01:01:04,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592971259] [2020-10-27 01:01:04,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 01:01:04,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:04,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 01:01:04,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:01:04,904 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand 18 states. [2020-10-27 01:01:05,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:05,007 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-10-27 01:01:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:01:05,009 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 69 [2020-10-27 01:01:05,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:05,010 INFO L225 Difference]: With dead ends: 86 [2020-10-27 01:01:05,010 INFO L226 Difference]: Without dead ends: 78 [2020-10-27 01:01:05,011 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 01:01:05,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-27 01:01:05,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 75. [2020-10-27 01:01:05,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:01:05,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2020-10-27 01:01:05,015 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 69 [2020-10-27 01:01:05,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:05,016 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2020-10-27 01:01:05,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 01:01:05,016 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2020-10-27 01:01:05,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:01:05,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:05,019 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:05,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:01:05,019 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:05,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:05,020 INFO L82 PathProgramCache]: Analyzing trace with hash 890876055, now seen corresponding path program 5 times [2020-10-27 01:01:05,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:05,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2073609217] [2020-10-27 01:01:05,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:05,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:05,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:05,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:05,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:01:05,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 630 [2020-10-27 01:01:05,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 01:01:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:05,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:01:05,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:05,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:05,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:05,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:05,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:05,946 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:05,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2073609217] [2020-10-27 01:01:05,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:05,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-27 01:01:05,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145108862] [2020-10-27 01:01:05,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-27 01:01:05,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:05,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-27 01:01:05,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:01:05,949 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand 19 states. [2020-10-27 01:01:06,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:06,070 INFO L93 Difference]: Finished difference Result 90 states and 94 transitions. [2020-10-27 01:01:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:01:06,071 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 73 [2020-10-27 01:01:06,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:06,071 INFO L225 Difference]: With dead ends: 90 [2020-10-27 01:01:06,071 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 01:01:06,072 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 01:01:06,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 01:01:06,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 79. [2020-10-27 01:01:06,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 01:01:06,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2020-10-27 01:01:06,077 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 73 [2020-10-27 01:01:06,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:06,077 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2020-10-27 01:01:06,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-27 01:01:06,077 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2020-10-27 01:01:06,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:01:06,078 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:06,078 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:06,078 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:01:06,078 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:06,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:06,079 INFO L82 PathProgramCache]: Analyzing trace with hash 923485424, now seen corresponding path program 6 times [2020-10-27 01:01:06,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:06,079 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203802634] [2020-10-27 01:01:06,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:06,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:06,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:06,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:06,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:06,794 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-27 01:01:06,794 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:06,794 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-27 01:01:06,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-27 01:01:06,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:06,795 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:01:06,795 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:07,058 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:07,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:07,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:07,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:07,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:07,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 01:01:07,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:07,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:07,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:07,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:07,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:07,084 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:07,084 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203802634] [2020-10-27 01:01:07,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:07,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-27 01:01:07,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452950117] [2020-10-27 01:01:07,087 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-27 01:01:07,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:07,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-27 01:01:07,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:01:07,094 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand 20 states. [2020-10-27 01:01:07,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:07,200 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2020-10-27 01:01:07,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:01:07,201 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 77 [2020-10-27 01:01:07,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:07,202 INFO L225 Difference]: With dead ends: 94 [2020-10-27 01:01:07,202 INFO L226 Difference]: Without dead ends: 86 [2020-10-27 01:01:07,203 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 01:01:07,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-27 01:01:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 83. [2020-10-27 01:01:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:01:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2020-10-27 01:01:07,216 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 77 [2020-10-27 01:01:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:07,216 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2020-10-27 01:01:07,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-27 01:01:07,217 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2020-10-27 01:01:07,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-27 01:01:07,221 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:07,221 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:07,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:01:07,221 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:07,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash 49874121, now seen corresponding path program 7 times [2020-10-27 01:01:07,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:07,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667667883] [2020-10-27 01:01:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:07,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:07,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:07,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:07,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:07,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-27 01:01:07,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:07,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 691 [2020-10-27 01:01:07,942 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:07,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-27 01:01:07,942 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:07,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 01:01:07,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:08,251 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:08,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:08,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:08,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:08,258 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:08,258 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:08,258 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:08,258 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:08,259 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:08,259 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:08,271 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:08,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667667883] [2020-10-27 01:01:08,271 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:08,271 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-27 01:01:08,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579258555] [2020-10-27 01:01:08,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-27 01:01:08,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:08,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-27 01:01:08,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-27 01:01:08,273 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand 21 states. [2020-10-27 01:01:08,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:08,382 INFO L93 Difference]: Finished difference Result 98 states and 102 transitions. [2020-10-27 01:01:08,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:01:08,383 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 81 [2020-10-27 01:01:08,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:08,384 INFO L225 Difference]: With dead ends: 98 [2020-10-27 01:01:08,384 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 01:01:08,385 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 01:01:08,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 01:01:08,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-27 01:01:08,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-27 01:01:08,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2020-10-27 01:01:08,389 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 81 [2020-10-27 01:01:08,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:08,390 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2020-10-27 01:01:08,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-27 01:01:08,390 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2020-10-27 01:01:08,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-27 01:01:08,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:08,391 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:08,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:01:08,391 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:08,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:08,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1612632030, now seen corresponding path program 8 times [2020-10-27 01:01:08,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:08,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330451983] [2020-10-27 01:01:08,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:08,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:08,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:08,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:09,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:09,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 01:01:09,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 656 [2020-10-27 01:01:09,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-27 01:01:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:09,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-27 01:01:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:09,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:09,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:09,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:09,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:09,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:09,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:09,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:01:09,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:09,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:09,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:09,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:09,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:09,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330451983] [2020-10-27 01:01:09,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:09,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-27 01:01:09,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810655173] [2020-10-27 01:01:09,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-27 01:01:09,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:09,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-27 01:01:09,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:01:09,412 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand 22 states. [2020-10-27 01:01:09,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:09,539 INFO L93 Difference]: Finished difference Result 102 states and 106 transitions. [2020-10-27 01:01:09,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:01:09,540 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 85 [2020-10-27 01:01:09,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:09,541 INFO L225 Difference]: With dead ends: 102 [2020-10-27 01:01:09,541 INFO L226 Difference]: Without dead ends: 94 [2020-10-27 01:01:09,542 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:01:09,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-27 01:01:09,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 91. [2020-10-27 01:01:09,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-27 01:01:09,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2020-10-27 01:01:09,547 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 85 [2020-10-27 01:01:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:09,558 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2020-10-27 01:01:09,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-27 01:01:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2020-10-27 01:01:09,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-27 01:01:09,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:09,559 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:09,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:01:09,559 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:09,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:09,560 INFO L82 PathProgramCache]: Analyzing trace with hash -341702917, now seen corresponding path program 9 times [2020-10-27 01:01:09,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:09,560 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762077153] [2020-10-27 01:01:09,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:09,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:09,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:10,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:10,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 01:01:10,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:10,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 814 [2020-10-27 01:01:10,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-27 01:01:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:10,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-27 01:01:10,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:10,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:10,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:10,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:10,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:10,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:10,745 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:10,745 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:10,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:10,746 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:10,759 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:10,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762077153] [2020-10-27 01:01:10,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:10,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-27 01:01:10,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419547924] [2020-10-27 01:01:10,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-27 01:01:10,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:10,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-27 01:01:10,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:01:10,761 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand 23 states. [2020-10-27 01:01:10,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:10,908 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2020-10-27 01:01:10,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:01:10,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 89 [2020-10-27 01:01:10,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:10,910 INFO L225 Difference]: With dead ends: 106 [2020-10-27 01:01:10,910 INFO L226 Difference]: Without dead ends: 98 [2020-10-27 01:01:10,912 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 01:01:10,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-27 01:01:10,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 95. [2020-10-27 01:01:10,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:01:10,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2020-10-27 01:01:10,922 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 89 [2020-10-27 01:01:10,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:10,925 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2020-10-27 01:01:10,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-27 01:01:10,925 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2020-10-27 01:01:10,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-27 01:01:10,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:10,926 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:10,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:01:10,927 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:10,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:10,927 INFO L82 PathProgramCache]: Analyzing trace with hash 721013076, now seen corresponding path program 10 times [2020-10-27 01:01:10,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:10,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653628668] [2020-10-27 01:01:10,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:11,057 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:11,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:11,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-27 01:01:11,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:11,802 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 843 [2020-10-27 01:01:11,802 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:11,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-27 01:01:11,802 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:11,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 01:01:11,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:12,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:12,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:12,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:12,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:12,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:12,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:12,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:12,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:12,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:12,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:12,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:12,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653628668] [2020-10-27 01:01:12,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:12,183 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-27 01:01:12,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294077658] [2020-10-27 01:01:12,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-27 01:01:12,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:12,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-27 01:01:12,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:01:12,185 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand 24 states. [2020-10-27 01:01:12,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:12,316 INFO L93 Difference]: Finished difference Result 110 states and 114 transitions. [2020-10-27 01:01:12,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-27 01:01:12,319 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 93 [2020-10-27 01:01:12,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:12,320 INFO L225 Difference]: With dead ends: 110 [2020-10-27 01:01:12,320 INFO L226 Difference]: Without dead ends: 102 [2020-10-27 01:01:12,321 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 01:01:12,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-27 01:01:12,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 99. [2020-10-27 01:01:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-27 01:01:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2020-10-27 01:01:12,327 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 93 [2020-10-27 01:01:12,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:12,327 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2020-10-27 01:01:12,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-27 01:01:12,327 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2020-10-27 01:01:12,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-27 01:01:12,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:12,328 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:12,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:01:12,329 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:12,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:12,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1719224531, now seen corresponding path program 11 times [2020-10-27 01:01:12,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:12,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957963911] [2020-10-27 01:01:12,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:12,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:12,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:12,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:13,261 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:13,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-27 01:01:13,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 913 [2020-10-27 01:01:13,262 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-27 01:01:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:13,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-10-27 01:01:13,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:13,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:13,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:13,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:13,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:13,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:13,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:13,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:01:13,672 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:13,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:13,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:13,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:13,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:13,687 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:13,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957963911] [2020-10-27 01:01:13,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:13,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-27 01:01:13,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483716026] [2020-10-27 01:01:13,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-27 01:01:13,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:13,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-27 01:01:13,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:01:13,690 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand 25 states. [2020-10-27 01:01:13,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:13,808 INFO L93 Difference]: Finished difference Result 114 states and 118 transitions. [2020-10-27 01:01:13,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 01:01:13,809 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 97 [2020-10-27 01:01:13,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:13,810 INFO L225 Difference]: With dead ends: 114 [2020-10-27 01:01:13,810 INFO L226 Difference]: Without dead ends: 106 [2020-10-27 01:01:13,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:01:13,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-27 01:01:13,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 103. [2020-10-27 01:01:13,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-27 01:01:13,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2020-10-27 01:01:13,822 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 97 [2020-10-27 01:01:13,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:13,822 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2020-10-27 01:01:13,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-27 01:01:13,822 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2020-10-27 01:01:13,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-27 01:01:13,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:13,823 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:13,823 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:01:13,823 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:13,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:13,824 INFO L82 PathProgramCache]: Analyzing trace with hash -104394618, now seen corresponding path program 12 times [2020-10-27 01:01:13,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:13,824 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1502585052] [2020-10-27 01:01:13,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:13,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:13,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:14,770 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:14,770 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-27 01:01:14,770 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:14,770 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 923 [2020-10-27 01:01:14,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:14,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-27 01:01:14,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:14,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 01:01:14,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:15,169 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:15,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:15,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:15,175 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:15,175 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:15,175 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:15,175 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:15,175 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:15,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:15,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:15,176 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:15,176 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:15,191 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:15,191 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1502585052] [2020-10-27 01:01:15,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:15,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-27 01:01:15,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261284177] [2020-10-27 01:01:15,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-27 01:01:15,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:15,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-27 01:01:15,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:01:15,193 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand 26 states. [2020-10-27 01:01:15,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:15,329 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2020-10-27 01:01:15,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 01:01:15,330 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 101 [2020-10-27 01:01:15,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:15,331 INFO L225 Difference]: With dead ends: 118 [2020-10-27 01:01:15,331 INFO L226 Difference]: Without dead ends: 110 [2020-10-27 01:01:15,332 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:01:15,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-27 01:01:15,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-27 01:01:15,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-27 01:01:15,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 109 transitions. [2020-10-27 01:01:15,339 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 109 transitions. Word has length 101 [2020-10-27 01:01:15,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:15,339 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 109 transitions. [2020-10-27 01:01:15,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-27 01:01:15,339 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 109 transitions. [2020-10-27 01:01:15,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-27 01:01:15,340 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:15,341 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:15,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:01:15,341 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:15,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:15,341 INFO L82 PathProgramCache]: Analyzing trace with hash 622400863, now seen corresponding path program 13 times [2020-10-27 01:01:15,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:15,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1334439202] [2020-10-27 01:01:15,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:15,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:15,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:15,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:16,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:16,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-27 01:01:16,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:16,326 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 961 [2020-10-27 01:01:16,326 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-27 01:01:16,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:16,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-10-27 01:01:16,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:16,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:16,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:16,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:16,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:16,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:16,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:16,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:16,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:16,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:16,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:16,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:16,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:16,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1334439202] [2020-10-27 01:01:16,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:16,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-27 01:01:16,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541517042] [2020-10-27 01:01:16,809 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-27 01:01:16,809 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:16,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-27 01:01:16,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:01:16,810 INFO L87 Difference]: Start difference. First operand 107 states and 109 transitions. Second operand 27 states. [2020-10-27 01:01:16,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:16,990 INFO L93 Difference]: Finished difference Result 122 states and 126 transitions. [2020-10-27 01:01:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-27 01:01:16,991 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 105 [2020-10-27 01:01:16,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:16,992 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:01:16,992 INFO L226 Difference]: Without dead ends: 114 [2020-10-27 01:01:16,993 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 01:01:16,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-27 01:01:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 111. [2020-10-27 01:01:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 01:01:16,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 113 transitions. [2020-10-27 01:01:16,998 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 113 transitions. Word has length 105 [2020-10-27 01:01:16,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:16,998 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 113 transitions. [2020-10-27 01:01:16,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-27 01:01:16,999 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 113 transitions. [2020-10-27 01:01:16,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-27 01:01:16,999 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:16,999 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:17,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:01:17,000 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:17,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:17,000 INFO L82 PathProgramCache]: Analyzing trace with hash -1682242120, now seen corresponding path program 14 times [2020-10-27 01:01:17,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:17,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568125384] [2020-10-27 01:01:17,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:17,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:17,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:18,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:18,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-27 01:01:18,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:18,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1047 [2020-10-27 01:01:18,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:18,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-27 01:01:18,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:18,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 98 [2020-10-27 01:01:18,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:18,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:18,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:18,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:18,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:18,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:18,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:18,538 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:18,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:18,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:18,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:18,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:18,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:18,556 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:18,557 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568125384] [2020-10-27 01:01:18,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:18,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-27 01:01:18,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82693907] [2020-10-27 01:01:18,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-27 01:01:18,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:18,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-27 01:01:18,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:01:18,559 INFO L87 Difference]: Start difference. First operand 111 states and 113 transitions. Second operand 28 states. [2020-10-27 01:01:18,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:18,738 INFO L93 Difference]: Finished difference Result 126 states and 130 transitions. [2020-10-27 01:01:18,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 01:01:18,739 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 109 [2020-10-27 01:01:18,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:18,740 INFO L225 Difference]: With dead ends: 126 [2020-10-27 01:01:18,740 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:01:18,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-27 01:01:18,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:01:18,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 115. [2020-10-27 01:01:18,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 01:01:18,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 117 transitions. [2020-10-27 01:01:18,749 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 117 transitions. Word has length 109 [2020-10-27 01:01:18,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:18,749 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 117 transitions. [2020-10-27 01:01:18,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-27 01:01:18,749 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 117 transitions. [2020-10-27 01:01:18,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-27 01:01:18,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:18,750 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:18,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:01:18,750 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:18,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:18,751 INFO L82 PathProgramCache]: Analyzing trace with hash 348856721, now seen corresponding path program 15 times [2020-10-27 01:01:18,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:18,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215138605] [2020-10-27 01:01:18,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:18,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:18,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:18,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:19,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:19,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-27 01:01:19,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:19,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1123 [2020-10-27 01:01:19,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-27 01:01:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:19,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 102 [2020-10-27 01:01:19,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:20,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:20,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:20,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:20,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:20,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:20,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:20,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:20,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:20,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:20,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:20,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:20,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:20,411 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:20,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215138605] [2020-10-27 01:01:20,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:20,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-27 01:01:20,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114202728] [2020-10-27 01:01:20,412 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-27 01:01:20,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:20,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-27 01:01:20,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:01:20,413 INFO L87 Difference]: Start difference. First operand 115 states and 117 transitions. Second operand 29 states. [2020-10-27 01:01:20,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:20,543 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2020-10-27 01:01:20,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-27 01:01:20,543 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 113 [2020-10-27 01:01:20,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:20,545 INFO L225 Difference]: With dead ends: 130 [2020-10-27 01:01:20,545 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 01:01:20,546 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-27 01:01:20,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 01:01:20,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 119. [2020-10-27 01:01:20,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-27 01:01:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 121 transitions. [2020-10-27 01:01:20,554 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 121 transitions. Word has length 113 [2020-10-27 01:01:20,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:20,554 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 121 transitions. [2020-10-27 01:01:20,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-27 01:01:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 121 transitions. [2020-10-27 01:01:20,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-27 01:01:20,556 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:20,556 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:20,556 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:01:20,556 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:20,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:20,557 INFO L82 PathProgramCache]: Analyzing trace with hash 239577322, now seen corresponding path program 16 times [2020-10-27 01:01:20,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:20,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1620972239] [2020-10-27 01:01:20,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:20,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:20,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:20,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:21,806 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:21,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-27 01:01:21,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:21,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1222 [2020-10-27 01:01:21,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:21,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-27 01:01:21,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:21,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 106 [2020-10-27 01:01:21,807 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:22,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:22,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:22,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:22,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:22,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:22,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1620972239] [2020-10-27 01:01:22,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:22,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-27 01:01:22,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61787244] [2020-10-27 01:01:22,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-27 01:01:22,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:22,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-27 01:01:22,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:01:22,356 INFO L87 Difference]: Start difference. First operand 119 states and 121 transitions. Second operand 30 states. [2020-10-27 01:01:22,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:22,548 INFO L93 Difference]: Finished difference Result 134 states and 138 transitions. [2020-10-27 01:01:22,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:01:22,548 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 117 [2020-10-27 01:01:22,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:22,550 INFO L225 Difference]: With dead ends: 134 [2020-10-27 01:01:22,550 INFO L226 Difference]: Without dead ends: 126 [2020-10-27 01:01:22,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:01:22,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-27 01:01:22,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 123. [2020-10-27 01:01:22,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-27 01:01:22,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 125 transitions. [2020-10-27 01:01:22,558 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 125 transitions. Word has length 117 [2020-10-27 01:01:22,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:22,558 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 125 transitions. [2020-10-27 01:01:22,559 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-27 01:01:22,559 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 125 transitions. [2020-10-27 01:01:22,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-27 01:01:22,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:22,560 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:22,560 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:01:22,560 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:22,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:22,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1561254851, now seen corresponding path program 17 times [2020-10-27 01:01:22,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:22,561 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [73560576] [2020-10-27 01:01:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:22,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:22,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:22,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:23,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:23,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-27 01:01:23,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:23,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1302 [2020-10-27 01:01:23,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:23,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-27 01:01:23,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:23,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 110 [2020-10-27 01:01:23,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:24,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:24,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:24,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:24,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:24,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:24,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:24,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:24,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:24,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:24,441 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:24,462 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:24,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [73560576] [2020-10-27 01:01:24,463 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:24,463 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-27 01:01:24,463 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779676766] [2020-10-27 01:01:24,463 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-27 01:01:24,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:24,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-27 01:01:24,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:01:24,464 INFO L87 Difference]: Start difference. First operand 123 states and 125 transitions. Second operand 31 states. [2020-10-27 01:01:24,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:24,604 INFO L93 Difference]: Finished difference Result 138 states and 142 transitions. [2020-10-27 01:01:24,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-27 01:01:24,605 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 121 [2020-10-27 01:01:24,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:24,606 INFO L225 Difference]: With dead ends: 138 [2020-10-27 01:01:24,606 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:01:24,607 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-27 01:01:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:01:24,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-27 01:01:24,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-27 01:01:24,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 129 transitions. [2020-10-27 01:01:24,620 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 129 transitions. Word has length 121 [2020-10-27 01:01:24,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:24,622 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 129 transitions. [2020-10-27 01:01:24,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-27 01:01:24,622 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 129 transitions. [2020-10-27 01:01:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-27 01:01:24,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:24,624 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:24,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:01:24,624 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:24,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:24,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1126237668, now seen corresponding path program 18 times [2020-10-27 01:01:24,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:24,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200794040] [2020-10-27 01:01:24,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:24,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:24,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:24,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:26,021 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:26,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-27 01:01:26,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:26,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1356 [2020-10-27 01:01:26,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:26,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-27 01:01:26,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:26,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 114 [2020-10-27 01:01:26,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:26,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:26,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:26,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:26,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:26,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:26,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:26,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:26,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:26,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:26,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:26,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:26,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:26,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200794040] [2020-10-27 01:01:26,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:26,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-27 01:01:26,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490056354] [2020-10-27 01:01:26,787 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-27 01:01:26,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:26,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-27 01:01:26,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:01:26,788 INFO L87 Difference]: Start difference. First operand 127 states and 129 transitions. Second operand 32 states. [2020-10-27 01:01:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:26,993 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2020-10-27 01:01:26,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 01:01:26,998 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 125 [2020-10-27 01:01:26,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:27,000 INFO L225 Difference]: With dead ends: 142 [2020-10-27 01:01:27,000 INFO L226 Difference]: Without dead ends: 134 [2020-10-27 01:01:27,001 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 01:01:27,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-27 01:01:27,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 131. [2020-10-27 01:01:27,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-27 01:01:27,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 133 transitions. [2020-10-27 01:01:27,007 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 133 transitions. Word has length 125 [2020-10-27 01:01:27,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:27,012 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 133 transitions. [2020-10-27 01:01:27,012 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-27 01:01:27,013 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 133 transitions. [2020-10-27 01:01:27,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 01:01:27,014 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:27,014 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:27,014 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:01:27,014 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:27,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:27,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1616266229, now seen corresponding path program 19 times [2020-10-27 01:01:27,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:27,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [502372601] [2020-10-27 01:01:27,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:27,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:27,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:27,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:29,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:29,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-27 01:01:29,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:29,034 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1978 [2020-10-27 01:01:29,034 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:29,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-27 01:01:29,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:29,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 118 [2020-10-27 01:01:29,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:29,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:29,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:29,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:29,704 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:29,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:29,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:29,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:01:29,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:29,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:29,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:29,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:29,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:29,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:29,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [502372601] [2020-10-27 01:01:29,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:29,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-27 01:01:29,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312226904] [2020-10-27 01:01:29,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-27 01:01:29,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:29,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-27 01:01:29,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-27 01:01:29,734 INFO L87 Difference]: Start difference. First operand 131 states and 133 transitions. Second operand 33 states. [2020-10-27 01:01:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:29,924 INFO L93 Difference]: Finished difference Result 146 states and 150 transitions. [2020-10-27 01:01:29,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 01:01:29,925 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 129 [2020-10-27 01:01:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:29,927 INFO L225 Difference]: With dead ends: 146 [2020-10-27 01:01:29,927 INFO L226 Difference]: Without dead ends: 138 [2020-10-27 01:01:29,928 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 01:01:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-27 01:01:29,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 135. [2020-10-27 01:01:29,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-27 01:01:29,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 137 transitions. [2020-10-27 01:01:29,938 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 137 transitions. Word has length 129 [2020-10-27 01:01:29,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:29,939 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 137 transitions. [2020-10-27 01:01:29,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-27 01:01:29,939 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 137 transitions. [2020-10-27 01:01:29,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-27 01:01:29,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:29,941 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:29,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:01:29,942 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:29,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:29,942 INFO L82 PathProgramCache]: Analyzing trace with hash -2131560114, now seen corresponding path program 20 times [2020-10-27 01:01:29,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:29,943 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [149525655] [2020-10-27 01:01:29,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:29,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:29,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:30,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:31,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:31,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 01:01:31,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1696 [2020-10-27 01:01:31,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-27 01:01:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:31,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 122 [2020-10-27 01:01:31,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:32,336 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:32,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:32,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:32,363 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:32,364 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:32,364 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:32,364 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 01:01:32,364 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:32,364 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:32,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:32,365 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:32,365 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:32,392 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [149525655] [2020-10-27 01:01:32,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:32,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-27 01:01:32,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023748698] [2020-10-27 01:01:32,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-27 01:01:32,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:32,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-27 01:01:32,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:01:32,394 INFO L87 Difference]: Start difference. First operand 135 states and 137 transitions. Second operand 34 states. [2020-10-27 01:01:32,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:32,541 INFO L93 Difference]: Finished difference Result 150 states and 154 transitions. [2020-10-27 01:01:32,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-27 01:01:32,542 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 133 [2020-10-27 01:01:32,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:32,543 INFO L225 Difference]: With dead ends: 150 [2020-10-27 01:01:32,543 INFO L226 Difference]: Without dead ends: 142 [2020-10-27 01:01:32,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-27 01:01:32,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2020-10-27 01:01:32,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2020-10-27 01:01:32,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-27 01:01:32,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 141 transitions. [2020-10-27 01:01:32,552 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 141 transitions. Word has length 133 [2020-10-27 01:01:32,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:32,553 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 141 transitions. [2020-10-27 01:01:32,553 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-27 01:01:32,553 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 141 transitions. [2020-10-27 01:01:32,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-27 01:01:32,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:32,554 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:32,554 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:01:32,554 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:32,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:32,555 INFO L82 PathProgramCache]: Analyzing trace with hash -283944409, now seen corresponding path program 21 times [2020-10-27 01:01:32,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:32,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841219881] [2020-10-27 01:01:32,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:32,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:32,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:32,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:34,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:34,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-27 01:01:34,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:34,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1918 [2020-10-27 01:01:34,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-27 01:01:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:34,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 126 [2020-10-27 01:01:34,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:35,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:35,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:35,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:35,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:35,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:35,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:35,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:01:35,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:35,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:35,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:35,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:35,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:35,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:35,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841219881] [2020-10-27 01:01:35,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:35,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-27 01:01:35,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717235114] [2020-10-27 01:01:35,207 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-27 01:01:35,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:35,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-27 01:01:35,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:01:35,208 INFO L87 Difference]: Start difference. First operand 139 states and 141 transitions. Second operand 35 states. [2020-10-27 01:01:35,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:35,398 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2020-10-27 01:01:35,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-27 01:01:35,399 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 137 [2020-10-27 01:01:35,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:35,402 INFO L225 Difference]: With dead ends: 154 [2020-10-27 01:01:35,402 INFO L226 Difference]: Without dead ends: 146 [2020-10-27 01:01:35,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 01:01:35,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-27 01:01:35,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 143. [2020-10-27 01:01:35,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:01:35,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 145 transitions. [2020-10-27 01:01:35,417 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 145 transitions. Word has length 137 [2020-10-27 01:01:35,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:35,418 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 145 transitions. [2020-10-27 01:01:35,418 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-27 01:01:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 145 transitions. [2020-10-27 01:01:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-27 01:01:35,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:35,419 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:35,419 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:01:35,419 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:35,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:35,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1577736576, now seen corresponding path program 22 times [2020-10-27 01:01:35,420 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:35,420 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1590500944] [2020-10-27 01:01:35,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:35,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:35,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:37,271 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:37,271 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-27 01:01:37,271 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:37,271 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1823 [2020-10-27 01:01:37,271 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-27 01:01:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:37,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 130 [2020-10-27 01:01:37,272 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:38,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:38,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:38,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:38,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1590500944] [2020-10-27 01:01:38,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:38,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-27 01:01:38,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305834123] [2020-10-27 01:01:38,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-27 01:01:38,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:38,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-27 01:01:38,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:01:38,071 INFO L87 Difference]: Start difference. First operand 143 states and 145 transitions. Second operand 36 states. [2020-10-27 01:01:38,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:38,241 INFO L93 Difference]: Finished difference Result 158 states and 162 transitions. [2020-10-27 01:01:38,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-27 01:01:38,242 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 141 [2020-10-27 01:01:38,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:38,243 INFO L225 Difference]: With dead ends: 158 [2020-10-27 01:01:38,244 INFO L226 Difference]: Without dead ends: 150 [2020-10-27 01:01:38,244 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-27 01:01:38,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-27 01:01:38,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-27 01:01:38,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-27 01:01:38,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 149 transitions. [2020-10-27 01:01:38,251 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 149 transitions. Word has length 141 [2020-10-27 01:01:38,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:38,252 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 149 transitions. [2020-10-27 01:01:38,252 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-27 01:01:38,252 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 149 transitions. [2020-10-27 01:01:38,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-27 01:01:38,253 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:38,253 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:38,253 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:01:38,253 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:38,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:38,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1203248729, now seen corresponding path program 23 times [2020-10-27 01:01:38,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:38,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457650921] [2020-10-27 01:01:38,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:38,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:38,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:40,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:40,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 153 [2020-10-27 01:01:40,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:40,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1782 [2020-10-27 01:01:40,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:40,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-27 01:01:40,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:40,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 134 [2020-10-27 01:01:40,068 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:40,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:40,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:40,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:40,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:40,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:40,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:40,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:40,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:40,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:40,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:40,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:40,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:40,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:40,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457650921] [2020-10-27 01:01:40,859 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:40,859 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-27 01:01:40,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264301638] [2020-10-27 01:01:40,860 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-27 01:01:40,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:40,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-27 01:01:40,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:01:40,861 INFO L87 Difference]: Start difference. First operand 147 states and 149 transitions. Second operand 37 states. [2020-10-27 01:01:41,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:41,082 INFO L93 Difference]: Finished difference Result 162 states and 166 transitions. [2020-10-27 01:01:41,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-27 01:01:41,083 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 145 [2020-10-27 01:01:41,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:41,085 INFO L225 Difference]: With dead ends: 162 [2020-10-27 01:01:41,085 INFO L226 Difference]: Without dead ends: 154 [2020-10-27 01:01:41,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 01:01:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-27 01:01:41,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 151. [2020-10-27 01:01:41,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-27 01:01:41,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 153 transitions. [2020-10-27 01:01:41,093 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 153 transitions. Word has length 145 [2020-10-27 01:01:41,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:41,093 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 153 transitions. [2020-10-27 01:01:41,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-27 01:01:41,093 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 153 transitions. [2020-10-27 01:01:41,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-27 01:01:41,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:41,094 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:41,094 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:01:41,095 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:41,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:41,095 INFO L82 PathProgramCache]: Analyzing trace with hash -715587150, now seen corresponding path program 24 times [2020-10-27 01:01:41,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:41,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877540595] [2020-10-27 01:01:41,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:41,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:41,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:43,027 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:43,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-27 01:01:43,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:43,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1898 [2020-10-27 01:01:43,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-27 01:01:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:43,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 138 [2020-10-27 01:01:43,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:43,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:43,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:43,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:43,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:43,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:43,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:43,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:43,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:43,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:43,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:43,852 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:43,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877540595] [2020-10-27 01:01:43,853 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:43,853 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-27 01:01:43,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648238485] [2020-10-27 01:01:43,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-27 01:01:43,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:43,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-27 01:01:43,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:01:43,855 INFO L87 Difference]: Start difference. First operand 151 states and 153 transitions. Second operand 38 states. [2020-10-27 01:01:44,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:44,096 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2020-10-27 01:01:44,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-27 01:01:44,097 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 149 [2020-10-27 01:01:44,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:44,099 INFO L225 Difference]: With dead ends: 166 [2020-10-27 01:01:44,099 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 01:01:44,101 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-27 01:01:44,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 01:01:44,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 155. [2020-10-27 01:01:44,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-27 01:01:44,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 157 transitions. [2020-10-27 01:01:44,107 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 157 transitions. Word has length 149 [2020-10-27 01:01:44,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:44,108 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 157 transitions. [2020-10-27 01:01:44,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-27 01:01:44,108 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 157 transitions. [2020-10-27 01:01:44,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-27 01:01:44,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:44,109 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:44,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:01:44,109 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:44,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:44,110 INFO L82 PathProgramCache]: Analyzing trace with hash 381063307, now seen corresponding path program 25 times [2020-10-27 01:01:44,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:44,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266154023] [2020-10-27 01:01:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:44,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:44,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:46,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:46,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-27 01:01:46,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:46,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2029 [2020-10-27 01:01:46,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-27 01:01:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:46,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 142 [2020-10-27 01:01:46,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:47,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:47,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:47,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:47,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:47,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:47,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:47,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:47,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:47,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:47,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:47,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:47,045 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:47,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266154023] [2020-10-27 01:01:47,045 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:47,046 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-27 01:01:47,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517669216] [2020-10-27 01:01:47,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-27 01:01:47,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:47,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-27 01:01:47,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:01:47,051 INFO L87 Difference]: Start difference. First operand 155 states and 157 transitions. Second operand 39 states. [2020-10-27 01:01:47,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:47,236 INFO L93 Difference]: Finished difference Result 170 states and 174 transitions. [2020-10-27 01:01:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-27 01:01:47,237 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 153 [2020-10-27 01:01:47,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:47,238 INFO L225 Difference]: With dead ends: 170 [2020-10-27 01:01:47,238 INFO L226 Difference]: Without dead ends: 162 [2020-10-27 01:01:47,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-27 01:01:47,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-27 01:01:47,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 159. [2020-10-27 01:01:47,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-27 01:01:47,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 161 transitions. [2020-10-27 01:01:47,246 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 161 transitions. Word has length 153 [2020-10-27 01:01:47,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:47,246 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 161 transitions. [2020-10-27 01:01:47,247 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-27 01:01:47,247 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 161 transitions. [2020-10-27 01:01:47,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-27 01:01:47,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:47,249 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:47,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:01:47,249 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:47,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:47,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1049561828, now seen corresponding path program 26 times [2020-10-27 01:01:47,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:47,250 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [569445732] [2020-10-27 01:01:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:47,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:47,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2263 [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 146 [2020-10-27 01:01:49,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:50,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:50,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:50,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:50,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:50,571 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:50,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [569445732] [2020-10-27 01:01:50,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:50,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-27 01:01:50,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [914296583] [2020-10-27 01:01:50,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-27 01:01:50,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:50,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-27 01:01:50,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:01:50,574 INFO L87 Difference]: Start difference. First operand 159 states and 161 transitions. Second operand 40 states. [2020-10-27 01:01:50,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:50,812 INFO L93 Difference]: Finished difference Result 174 states and 178 transitions. [2020-10-27 01:01:50,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-27 01:01:50,812 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 157 [2020-10-27 01:01:50,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:50,817 INFO L225 Difference]: With dead ends: 174 [2020-10-27 01:01:50,817 INFO L226 Difference]: Without dead ends: 166 [2020-10-27 01:01:50,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-27 01:01:50,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-27 01:01:50,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 163. [2020-10-27 01:01:50,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-27 01:01:50,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 165 transitions. [2020-10-27 01:01:50,824 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 165 transitions. Word has length 157 [2020-10-27 01:01:50,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:50,825 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 165 transitions. [2020-10-27 01:01:50,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-27 01:01:50,825 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 165 transitions. [2020-10-27 01:01:50,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2020-10-27 01:01:50,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:50,826 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:50,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:01:50,826 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:50,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:50,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1988145341, now seen corresponding path program 27 times [2020-10-27 01:01:50,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:50,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1363126112] [2020-10-27 01:01:50,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:50,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:50,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:50,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:53,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:53,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 169 [2020-10-27 01:01:53,430 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:53,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2569 [2020-10-27 01:01:53,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-27 01:01:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:53,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 150 [2020-10-27 01:01:53,430 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:54,400 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:54,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:54,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:54,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:54,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:54,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:54,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:01:54,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:54,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:54,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:54,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:54,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:54,432 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:54,433 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1363126112] [2020-10-27 01:01:54,433 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:54,433 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-27 01:01:54,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685685399] [2020-10-27 01:01:54,434 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-27 01:01:54,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:54,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-27 01:01:54,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:01:54,435 INFO L87 Difference]: Start difference. First operand 163 states and 165 transitions. Second operand 41 states. [2020-10-27 01:01:54,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:54,619 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2020-10-27 01:01:54,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-27 01:01:54,619 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 161 [2020-10-27 01:01:54,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:54,622 INFO L225 Difference]: With dead ends: 178 [2020-10-27 01:01:54,622 INFO L226 Difference]: Without dead ends: 170 [2020-10-27 01:01:54,623 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-27 01:01:54,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-27 01:01:54,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-27 01:01:54,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-27 01:01:54,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 169 transitions. [2020-10-27 01:01:54,631 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 169 transitions. Word has length 161 [2020-10-27 01:01:54,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:54,631 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 169 transitions. [2020-10-27 01:01:54,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-27 01:01:54,631 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 169 transitions. [2020-10-27 01:01:54,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-27 01:01:54,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:54,633 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:54,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:01:54,633 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:54,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:54,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1862910486, now seen corresponding path program 28 times [2020-10-27 01:01:54,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:54,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1046616945] [2020-10-27 01:01:54,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:54,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:54,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:54,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:57,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:57,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-27 01:01:57,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:01:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2834 [2020-10-27 01:01:57,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-27 01:01:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:01:57,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 154 [2020-10-27 01:01:57,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:58,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:01:58,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:58,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:58,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:01:58,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:01:58,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:01:58,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:01:58,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:01:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:01:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:01:58,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:01:58,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:01:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:01:58,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1046616945] [2020-10-27 01:01:58,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:01:58,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-27 01:01:58,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250049859] [2020-10-27 01:01:58,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-27 01:01:58,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:01:58,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-27 01:01:58,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:01:58,527 INFO L87 Difference]: Start difference. First operand 167 states and 169 transitions. Second operand 42 states. [2020-10-27 01:01:58,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:01:58,772 INFO L93 Difference]: Finished difference Result 182 states and 186 transitions. [2020-10-27 01:01:58,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-27 01:01:58,772 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 165 [2020-10-27 01:01:58,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:01:58,774 INFO L225 Difference]: With dead ends: 182 [2020-10-27 01:01:58,774 INFO L226 Difference]: Without dead ends: 174 [2020-10-27 01:01:58,775 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-27 01:01:58,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-27 01:01:58,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 171. [2020-10-27 01:01:58,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-27 01:01:58,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 173 transitions. [2020-10-27 01:01:58,782 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 173 transitions. Word has length 165 [2020-10-27 01:01:58,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:01:58,782 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 173 transitions. [2020-10-27 01:01:58,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-27 01:01:58,782 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 173 transitions. [2020-10-27 01:01:58,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-27 01:01:58,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:01:58,784 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:01:58,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:01:58,784 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:01:58,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:01:58,784 INFO L82 PathProgramCache]: Analyzing trace with hash -276267281, now seen corresponding path program 29 times [2020-10-27 01:01:58,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:01:58,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830114413] [2020-10-27 01:01:58,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:01:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:01:58,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:01:58,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2513 [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 158 [2020-10-27 01:02:01,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:02,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:02,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:02,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:02,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:02,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:02,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:02,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:02,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:02,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:02,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:02,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:02,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:02,423 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:02,424 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830114413] [2020-10-27 01:02:02,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:02,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-27 01:02:02,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413597518] [2020-10-27 01:02:02,424 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-27 01:02:02,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:02,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-27 01:02:02,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:02:02,425 INFO L87 Difference]: Start difference. First operand 171 states and 173 transitions. Second operand 43 states. [2020-10-27 01:02:02,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:02,682 INFO L93 Difference]: Finished difference Result 186 states and 190 transitions. [2020-10-27 01:02:02,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-27 01:02:02,683 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 169 [2020-10-27 01:02:02,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:02,684 INFO L225 Difference]: With dead ends: 186 [2020-10-27 01:02:02,684 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 01:02:02,685 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-27 01:02:02,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 01:02:02,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 175. [2020-10-27 01:02:02,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-27 01:02:02,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 177 transitions. [2020-10-27 01:02:02,692 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 177 transitions. Word has length 169 [2020-10-27 01:02:02,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:02,692 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 177 transitions. [2020-10-27 01:02:02,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-27 01:02:02,692 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 177 transitions. [2020-10-27 01:02:02,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-27 01:02:02,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:02,693 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:02,694 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:02:02,694 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:02,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:02,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1715152712, now seen corresponding path program 30 times [2020-10-27 01:02:02,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:02,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1810019350] [2020-10-27 01:02:02,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:02,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:02,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:02,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:05,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:05,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-27 01:02:05,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2573 [2020-10-27 01:02:05,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-27 01:02:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:05,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 162 [2020-10-27 01:02:05,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:06,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:06,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:06,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:06,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:06,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:06,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:06,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:06,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:06,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:06,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:06,394 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:06,394 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1810019350] [2020-10-27 01:02:06,394 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:06,394 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-27 01:02:06,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37682863] [2020-10-27 01:02:06,395 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-27 01:02:06,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:06,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-27 01:02:06,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:02:06,396 INFO L87 Difference]: Start difference. First operand 175 states and 177 transitions. Second operand 44 states. [2020-10-27 01:02:06,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:06,602 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2020-10-27 01:02:06,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-27 01:02:06,602 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 173 [2020-10-27 01:02:06,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:06,604 INFO L225 Difference]: With dead ends: 190 [2020-10-27 01:02:06,604 INFO L226 Difference]: Without dead ends: 182 [2020-10-27 01:02:06,605 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-27 01:02:06,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-27 01:02:06,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 179. [2020-10-27 01:02:06,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 179 states. [2020-10-27 01:02:06,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 181 transitions. [2020-10-27 01:02:06,612 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 181 transitions. Word has length 173 [2020-10-27 01:02:06,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:06,612 INFO L481 AbstractCegarLoop]: Abstraction has 179 states and 181 transitions. [2020-10-27 01:02:06,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-27 01:02:06,613 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 181 transitions. [2020-10-27 01:02:06,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-27 01:02:06,614 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:06,614 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:06,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:02:06,614 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:06,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:06,615 INFO L82 PathProgramCache]: Analyzing trace with hash 2017458977, now seen corresponding path program 31 times [2020-10-27 01:02:06,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:06,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1341848575] [2020-10-27 01:02:06,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:06,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:06,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:06,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:09,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:09,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-27 01:02:09,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:09,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2999 [2020-10-27 01:02:09,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:09,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-27 01:02:09,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:09,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 166 [2020-10-27 01:02:09,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:10,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:10,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:10,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:10,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:10,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:10,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:10,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:10,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:10,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:10,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:10,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:10,749 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1341848575] [2020-10-27 01:02:10,749 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:10,749 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-27 01:02:10,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969390146] [2020-10-27 01:02:10,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-27 01:02:10,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:10,750 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-27 01:02:10,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:02:10,751 INFO L87 Difference]: Start difference. First operand 179 states and 181 transitions. Second operand 45 states. [2020-10-27 01:02:11,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:11,041 INFO L93 Difference]: Finished difference Result 194 states and 198 transitions. [2020-10-27 01:02:11,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-27 01:02:11,041 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 177 [2020-10-27 01:02:11,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:11,043 INFO L225 Difference]: With dead ends: 194 [2020-10-27 01:02:11,043 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 01:02:11,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-27 01:02:11,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 01:02:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 183. [2020-10-27 01:02:11,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 183 states. [2020-10-27 01:02:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 185 transitions. [2020-10-27 01:02:11,050 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 185 transitions. Word has length 177 [2020-10-27 01:02:11,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:11,050 INFO L481 AbstractCegarLoop]: Abstraction has 183 states and 185 transitions. [2020-10-27 01:02:11,050 INFO L482 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-27 01:02:11,050 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 185 transitions. [2020-10-27 01:02:11,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-27 01:02:11,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:11,051 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:11,052 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:02:11,052 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:11,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:11,052 INFO L82 PathProgramCache]: Analyzing trace with hash -1852491142, now seen corresponding path program 32 times [2020-10-27 01:02:11,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:11,053 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469769407] [2020-10-27 01:02:11,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:11,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:11,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:14,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:14,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-27 01:02:14,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:14,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3059 [2020-10-27 01:02:14,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-27 01:02:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:14,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 01:02:14,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:15,288 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:15,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:15,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:15,293 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:15,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:15,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:15,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:15,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:15,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:15,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:15,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:15,323 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:15,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469769407] [2020-10-27 01:02:15,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:15,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-27 01:02:15,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606159236] [2020-10-27 01:02:15,324 INFO L461 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-27 01:02:15,324 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:15,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-27 01:02:15,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:02:15,325 INFO L87 Difference]: Start difference. First operand 183 states and 185 transitions. Second operand 46 states. [2020-10-27 01:02:15,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:15,587 INFO L93 Difference]: Finished difference Result 198 states and 202 transitions. [2020-10-27 01:02:15,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-27 01:02:15,587 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 181 [2020-10-27 01:02:15,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:15,588 INFO L225 Difference]: With dead ends: 198 [2020-10-27 01:02:15,589 INFO L226 Difference]: Without dead ends: 190 [2020-10-27 01:02:15,590 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 01:02:15,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-27 01:02:15,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-27 01:02:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-27 01:02:15,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 189 transitions. [2020-10-27 01:02:15,599 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 189 transitions. Word has length 181 [2020-10-27 01:02:15,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:15,599 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 189 transitions. [2020-10-27 01:02:15,599 INFO L482 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-27 01:02:15,599 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 189 transitions. [2020-10-27 01:02:15,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2020-10-27 01:02:15,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:15,601 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:15,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:02:15,601 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:15,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:15,601 INFO L82 PathProgramCache]: Analyzing trace with hash 1964582227, now seen corresponding path program 33 times [2020-10-27 01:02:15,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:15,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [430357839] [2020-10-27 01:02:15,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:15,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:15,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:15,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:19,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:19,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 193 [2020-10-27 01:02:19,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:19,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3365 [2020-10-27 01:02:19,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-27 01:02:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:19,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 174 [2020-10-27 01:02:19,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:20,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:20,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:20,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:20,225 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:20,225 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:20,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:02:20,225 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:20,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:20,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:20,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:20,226 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:20,257 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:20,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [430357839] [2020-10-27 01:02:20,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:20,258 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-10-27 01:02:20,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804878229] [2020-10-27 01:02:20,258 INFO L461 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-10-27 01:02:20,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:20,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-10-27 01:02:20,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:02:20,259 INFO L87 Difference]: Start difference. First operand 187 states and 189 transitions. Second operand 47 states. [2020-10-27 01:02:20,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:20,489 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2020-10-27 01:02:20,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2020-10-27 01:02:20,490 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 185 [2020-10-27 01:02:20,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:20,491 INFO L225 Difference]: With dead ends: 202 [2020-10-27 01:02:20,491 INFO L226 Difference]: Without dead ends: 194 [2020-10-27 01:02:20,492 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 01:02:20,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-27 01:02:20,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 191. [2020-10-27 01:02:20,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 191 states. [2020-10-27 01:02:20,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 193 transitions. [2020-10-27 01:02:20,499 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 193 transitions. Word has length 185 [2020-10-27 01:02:20,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:20,500 INFO L481 AbstractCegarLoop]: Abstraction has 191 states and 193 transitions. [2020-10-27 01:02:20,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-10-27 01:02:20,500 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 193 transitions. [2020-10-27 01:02:20,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2020-10-27 01:02:20,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:20,501 INFO L422 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:20,501 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:02:20,501 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:20,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:20,502 INFO L82 PathProgramCache]: Analyzing trace with hash -863372372, now seen corresponding path program 34 times [2020-10-27 01:02:20,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:20,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296245717] [2020-10-27 01:02:20,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:20,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:20,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3665 [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 178 [2020-10-27 01:02:24,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:25,480 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:25,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:25,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:25,486 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:25,486 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:25,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:25,487 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:25,487 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:25,487 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:25,534 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:25,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296245717] [2020-10-27 01:02:25,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:25,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-27 01:02:25,535 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037794985] [2020-10-27 01:02:25,535 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-27 01:02:25,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:25,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-27 01:02:25,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:02:25,537 INFO L87 Difference]: Start difference. First operand 191 states and 193 transitions. Second operand 48 states. [2020-10-27 01:02:25,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:25,783 INFO L93 Difference]: Finished difference Result 206 states and 210 transitions. [2020-10-27 01:02:25,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-10-27 01:02:25,783 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 189 [2020-10-27 01:02:25,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:25,785 INFO L225 Difference]: With dead ends: 206 [2020-10-27 01:02:25,785 INFO L226 Difference]: Without dead ends: 198 [2020-10-27 01:02:25,786 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2020-10-27 01:02:25,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-27 01:02:25,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 195. [2020-10-27 01:02:25,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 195 states. [2020-10-27 01:02:25,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 197 transitions. [2020-10-27 01:02:25,795 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 197 transitions. Word has length 189 [2020-10-27 01:02:25,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:25,796 INFO L481 AbstractCegarLoop]: Abstraction has 195 states and 197 transitions. [2020-10-27 01:02:25,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-27 01:02:25,796 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 197 transitions. [2020-10-27 01:02:25,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-27 01:02:25,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:25,797 INFO L422 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:25,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:02:25,798 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:25,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:25,798 INFO L82 PathProgramCache]: Analyzing trace with hash -1199178363, now seen corresponding path program 35 times [2020-10-27 01:02:25,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:25,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888125521] [2020-10-27 01:02:25,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:25,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:25,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:26,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:29,730 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:29,730 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-27 01:02:29,730 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:29,730 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3886 [2020-10-27 01:02:29,730 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:29,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 47 [2020-10-27 01:02:29,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:29,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 182 [2020-10-27 01:02:29,731 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:31,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:31,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:31,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:31,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888125521] [2020-10-27 01:02:31,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:31,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49] total 49 [2020-10-27 01:02:31,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484428505] [2020-10-27 01:02:31,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 49 states [2020-10-27 01:02:31,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:31,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2020-10-27 01:02:31,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:02:31,201 INFO L87 Difference]: Start difference. First operand 195 states and 197 transitions. Second operand 49 states. [2020-10-27 01:02:31,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:31,459 INFO L93 Difference]: Finished difference Result 210 states and 214 transitions. [2020-10-27 01:02:31,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2020-10-27 01:02:31,459 INFO L78 Accepts]: Start accepts. Automaton has 49 states. Word has length 193 [2020-10-27 01:02:31,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:31,461 INFO L225 Difference]: With dead ends: 210 [2020-10-27 01:02:31,461 INFO L226 Difference]: Without dead ends: 202 [2020-10-27 01:02:31,461 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2020-10-27 01:02:31,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-27 01:02:31,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 199. [2020-10-27 01:02:31,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-27 01:02:31,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 201 transitions. [2020-10-27 01:02:31,468 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 201 transitions. Word has length 193 [2020-10-27 01:02:31,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:31,468 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 201 transitions. [2020-10-27 01:02:31,468 INFO L482 AbstractCegarLoop]: Interpolant automaton has 49 states. [2020-10-27 01:02:31,468 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 201 transitions. [2020-10-27 01:02:31,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-27 01:02:31,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:31,469 INFO L422 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:31,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:02:31,470 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:31,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1619749598, now seen corresponding path program 36 times [2020-10-27 01:02:31,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:31,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1200890218] [2020-10-27 01:02:31,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:31,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:31,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:31,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:35,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:35,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-27 01:02:35,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:35,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3493 [2020-10-27 01:02:35,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-27 01:02:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:35,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 186 [2020-10-27 01:02:35,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:36,410 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:36,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:36,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:36,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:36,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:36,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:36,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:36,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:36,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:36,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:36,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:36,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:36,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1200890218] [2020-10-27 01:02:36,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:36,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50] total 50 [2020-10-27 01:02:36,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448861259] [2020-10-27 01:02:36,459 INFO L461 AbstractCegarLoop]: Interpolant automaton has 50 states [2020-10-27 01:02:36,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:36,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2020-10-27 01:02:36,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:02:36,460 INFO L87 Difference]: Start difference. First operand 199 states and 201 transitions. Second operand 50 states. [2020-10-27 01:02:36,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:36,752 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2020-10-27 01:02:36,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2020-10-27 01:02:36,752 INFO L78 Accepts]: Start accepts. Automaton has 50 states. Word has length 197 [2020-10-27 01:02:36,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:36,754 INFO L225 Difference]: With dead ends: 214 [2020-10-27 01:02:36,754 INFO L226 Difference]: Without dead ends: 206 [2020-10-27 01:02:36,755 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2020-10-27 01:02:36,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-27 01:02:36,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 203. [2020-10-27 01:02:36,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 203 states. [2020-10-27 01:02:36,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 205 transitions. [2020-10-27 01:02:36,761 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 205 transitions. Word has length 197 [2020-10-27 01:02:36,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:36,761 INFO L481 AbstractCegarLoop]: Abstraction has 203 states and 205 transitions. [2020-10-27 01:02:36,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 50 states. [2020-10-27 01:02:36,761 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 205 transitions. [2020-10-27 01:02:36,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-27 01:02:36,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:36,763 INFO L422 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:36,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:02:36,763 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:36,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:36,763 INFO L82 PathProgramCache]: Analyzing trace with hash -2097642569, now seen corresponding path program 37 times [2020-10-27 01:02:36,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:36,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [55778354] [2020-10-27 01:02:36,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:36,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:36,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:37,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:40,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:40,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-27 01:02:40,784 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:40,784 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3975 [2020-10-27 01:02:40,784 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:40,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 49 [2020-10-27 01:02:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:40,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 190 [2020-10-27 01:02:40,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:42,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:42,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:42,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:42,232 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:42,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [55778354] [2020-10-27 01:02:42,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:42,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51] total 51 [2020-10-27 01:02:42,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778970359] [2020-10-27 01:02:42,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 51 states [2020-10-27 01:02:42,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:42,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2020-10-27 01:02:42,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:02:42,234 INFO L87 Difference]: Start difference. First operand 203 states and 205 transitions. Second operand 51 states. [2020-10-27 01:02:42,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:42,536 INFO L93 Difference]: Finished difference Result 218 states and 222 transitions. [2020-10-27 01:02:42,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-27 01:02:42,536 INFO L78 Accepts]: Start accepts. Automaton has 51 states. Word has length 201 [2020-10-27 01:02:42,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:42,538 INFO L225 Difference]: With dead ends: 218 [2020-10-27 01:02:42,538 INFO L226 Difference]: Without dead ends: 210 [2020-10-27 01:02:42,539 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2020-10-27 01:02:42,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-27 01:02:42,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-27 01:02:42,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-27 01:02:42,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 209 transitions. [2020-10-27 01:02:42,545 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 209 transitions. Word has length 201 [2020-10-27 01:02:42,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:42,546 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 209 transitions. [2020-10-27 01:02:42,546 INFO L482 AbstractCegarLoop]: Interpolant automaton has 51 states. [2020-10-27 01:02:42,546 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 209 transitions. [2020-10-27 01:02:42,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-27 01:02:42,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:42,547 INFO L422 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:42,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:02:42,547 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:42,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:42,548 INFO L82 PathProgramCache]: Analyzing trace with hash 84641808, now seen corresponding path program 38 times [2020-10-27 01:02:42,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:42,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [974399527] [2020-10-27 01:02:42,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:42,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:42,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:42,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:46,714 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:46,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 213 [2020-10-27 01:02:46,715 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:46,715 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4133 [2020-10-27 01:02:46,715 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:46,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 50 [2020-10-27 01:02:46,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:46,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 194 [2020-10-27 01:02:46,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:48,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:48,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:48,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:48,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:48,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:48,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:48,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:48,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:48,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:48,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:48,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:48,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:48,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:48,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [974399527] [2020-10-27 01:02:48,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:48,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52] total 52 [2020-10-27 01:02:48,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48860167] [2020-10-27 01:02:48,223 INFO L461 AbstractCegarLoop]: Interpolant automaton has 52 states [2020-10-27 01:02:48,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:48,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2020-10-27 01:02:48,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:02:48,224 INFO L87 Difference]: Start difference. First operand 207 states and 209 transitions. Second operand 52 states. [2020-10-27 01:02:48,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:48,490 INFO L93 Difference]: Finished difference Result 222 states and 226 transitions. [2020-10-27 01:02:48,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2020-10-27 01:02:48,491 INFO L78 Accepts]: Start accepts. Automaton has 52 states. Word has length 205 [2020-10-27 01:02:48,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:48,493 INFO L225 Difference]: With dead ends: 222 [2020-10-27 01:02:48,493 INFO L226 Difference]: Without dead ends: 214 [2020-10-27 01:02:48,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2020-10-27 01:02:48,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-27 01:02:48,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2020-10-27 01:02:48,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 211 states. [2020-10-27 01:02:48,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 213 transitions. [2020-10-27 01:02:48,500 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 213 transitions. Word has length 205 [2020-10-27 01:02:48,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:48,500 INFO L481 AbstractCegarLoop]: Abstraction has 211 states and 213 transitions. [2020-10-27 01:02:48,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 52 states. [2020-10-27 01:02:48,500 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 213 transitions. [2020-10-27 01:02:48,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-27 01:02:48,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:48,501 INFO L422 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:48,502 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:02:48,502 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:48,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:48,502 INFO L82 PathProgramCache]: Analyzing trace with hash -2099070999, now seen corresponding path program 39 times [2020-10-27 01:02:48,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:48,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210902629] [2020-10-27 01:02:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:48,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:48,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:48,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:52,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:52,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-27 01:02:52,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:52,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4047 [2020-10-27 01:02:52,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 51 [2020-10-27 01:02:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:52,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 198 [2020-10-27 01:02:52,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:54,168 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:02:54,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:54,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:54,174 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:54,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:02:54,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:02:54,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:02:54,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:02:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:02:54,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:02:54,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:02:54,212 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:02:54,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210902629] [2020-10-27 01:02:54,213 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:02:54,213 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-27 01:02:54,213 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902382805] [2020-10-27 01:02:54,213 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-27 01:02:54,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:02:54,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-27 01:02:54,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:02:54,215 INFO L87 Difference]: Start difference. First operand 211 states and 213 transitions. Second operand 53 states. [2020-10-27 01:02:54,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:02:54,636 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2020-10-27 01:02:54,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2020-10-27 01:02:54,637 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 209 [2020-10-27 01:02:54,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:02:54,639 INFO L225 Difference]: With dead ends: 226 [2020-10-27 01:02:54,640 INFO L226 Difference]: Without dead ends: 218 [2020-10-27 01:02:54,640 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2020-10-27 01:02:54,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-27 01:02:54,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 215. [2020-10-27 01:02:54,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-27 01:02:54,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 217 transitions. [2020-10-27 01:02:54,647 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 217 transitions. Word has length 209 [2020-10-27 01:02:54,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:02:54,647 INFO L481 AbstractCegarLoop]: Abstraction has 215 states and 217 transitions. [2020-10-27 01:02:54,647 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-27 01:02:54,647 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 217 transitions. [2020-10-27 01:02:54,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2020-10-27 01:02:54,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:02:54,649 INFO L422 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:02:54,649 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:02:54,649 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:02:54,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:02:54,650 INFO L82 PathProgramCache]: Analyzing trace with hash -545500350, now seen corresponding path program 40 times [2020-10-27 01:02:54,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:02:54,650 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303959465] [2020-10-27 01:02:54,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:02:54,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:02:54,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:54,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4556 [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 52 [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 202 [2020-10-27 01:02:59,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:00,880 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:00,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:00,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:00,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:00,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:00,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:00,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:03:00,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:00,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:00,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:00,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303959465] [2020-10-27 01:03:00,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:00,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54] total 54 [2020-10-27 01:03:00,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041260338] [2020-10-27 01:03:00,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 54 states [2020-10-27 01:03:00,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2020-10-27 01:03:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:03:00,937 INFO L87 Difference]: Start difference. First operand 215 states and 217 transitions. Second operand 54 states. [2020-10-27 01:03:01,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:01,260 INFO L93 Difference]: Finished difference Result 230 states and 234 transitions. [2020-10-27 01:03:01,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-10-27 01:03:01,261 INFO L78 Accepts]: Start accepts. Automaton has 54 states. Word has length 213 [2020-10-27 01:03:01,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:01,263 INFO L225 Difference]: With dead ends: 230 [2020-10-27 01:03:01,264 INFO L226 Difference]: Without dead ends: 222 [2020-10-27 01:03:01,265 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2020-10-27 01:03:01,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-27 01:03:01,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 219. [2020-10-27 01:03:01,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 219 states. [2020-10-27 01:03:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 221 transitions. [2020-10-27 01:03:01,271 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 221 transitions. Word has length 213 [2020-10-27 01:03:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:01,271 INFO L481 AbstractCegarLoop]: Abstraction has 219 states and 221 transitions. [2020-10-27 01:03:01,271 INFO L482 AbstractCegarLoop]: Interpolant automaton has 54 states. [2020-10-27 01:03:01,271 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 221 transitions. [2020-10-27 01:03:01,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-27 01:03:01,272 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:01,273 INFO L422 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:01,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:03:01,273 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:01,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:01,273 INFO L82 PathProgramCache]: Analyzing trace with hash -726230501, now seen corresponding path program 41 times [2020-10-27 01:03:01,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:01,274 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485329642] [2020-10-27 01:03:01,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:01,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:01,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:01,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:06,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:06,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-27 01:03:06,322 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:03:06,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:03:06,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 53 [2020-10-27 01:03:06,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:06,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 206 [2020-10-27 01:03:06,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:08,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:08,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:08,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:08,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:08,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:08,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:08,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:03:08,062 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:08,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:08,062 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:08,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:08,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:08,101 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 0 proven. 5151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:08,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485329642] [2020-10-27 01:03:08,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:08,101 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55] total 55 [2020-10-27 01:03:08,101 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085633268] [2020-10-27 01:03:08,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 55 states [2020-10-27 01:03:08,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:08,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2020-10-27 01:03:08,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:03:08,103 INFO L87 Difference]: Start difference. First operand 219 states and 221 transitions. Second operand 55 states. [2020-10-27 01:03:08,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:08,372 INFO L93 Difference]: Finished difference Result 234 states and 238 transitions. [2020-10-27 01:03:08,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2020-10-27 01:03:08,372 INFO L78 Accepts]: Start accepts. Automaton has 55 states. Word has length 217 [2020-10-27 01:03:08,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:08,374 INFO L225 Difference]: With dead ends: 234 [2020-10-27 01:03:08,374 INFO L226 Difference]: Without dead ends: 226 [2020-10-27 01:03:08,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2020-10-27 01:03:08,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-27 01:03:08,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 223. [2020-10-27 01:03:08,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 223 states. [2020-10-27 01:03:08,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 225 transitions. [2020-10-27 01:03:08,382 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 225 transitions. Word has length 217 [2020-10-27 01:03:08,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:08,383 INFO L481 AbstractCegarLoop]: Abstraction has 223 states and 225 transitions. [2020-10-27 01:03:08,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 55 states. [2020-10-27 01:03:08,383 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 225 transitions. [2020-10-27 01:03:08,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2020-10-27 01:03:08,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:08,384 INFO L422 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:08,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:03:08,385 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:08,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:08,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2091922316, now seen corresponding path program 42 times [2020-10-27 01:03:08,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:08,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196181154] [2020-10-27 01:03:08,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:08,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:08,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:13,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:13,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 01:03:13,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:03:13,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:03:13,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:13,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 54 [2020-10-27 01:03:13,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:13,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 210 [2020-10-27 01:03:13,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:15,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:15,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:15,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:15,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:15,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:15,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:15,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:03:15,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:15,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:15,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:15,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:15,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:15,368 INFO L134 CoverageAnalysis]: Checked inductivity of 5356 backedges. 0 proven. 5356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:15,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196181154] [2020-10-27 01:03:15,369 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:15,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56] total 56 [2020-10-27 01:03:15,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197382462] [2020-10-27 01:03:15,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 56 states [2020-10-27 01:03:15,370 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:15,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2020-10-27 01:03:15,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:03:15,371 INFO L87 Difference]: Start difference. First operand 223 states and 225 transitions. Second operand 56 states. [2020-10-27 01:03:15,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:15,759 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2020-10-27 01:03:15,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2020-10-27 01:03:15,760 INFO L78 Accepts]: Start accepts. Automaton has 56 states. Word has length 221 [2020-10-27 01:03:15,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:15,762 INFO L225 Difference]: With dead ends: 238 [2020-10-27 01:03:15,762 INFO L226 Difference]: Without dead ends: 230 [2020-10-27 01:03:15,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2020-10-27 01:03:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-27 01:03:15,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-10-27 01:03:15,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-27 01:03:15,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 229 transitions. [2020-10-27 01:03:15,769 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 229 transitions. Word has length 221 [2020-10-27 01:03:15,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:15,770 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 229 transitions. [2020-10-27 01:03:15,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 56 states. [2020-10-27 01:03:15,770 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 229 transitions. [2020-10-27 01:03:15,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-27 01:03:15,771 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:15,771 INFO L422 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:15,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:03:15,772 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:15,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:15,772 INFO L82 PathProgramCache]: Analyzing trace with hash 48638541, now seen corresponding path program 43 times [2020-10-27 01:03:15,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:15,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1308484754] [2020-10-27 01:03:15,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:15,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:15,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:15,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:20,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:20,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-27 01:03:20,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:03:20,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4769 [2020-10-27 01:03:20,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 55 [2020-10-27 01:03:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:20,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 214 [2020-10-27 01:03:20,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:22,500 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:22,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:22,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:22,505 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:22,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:22,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:03:22,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:22,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:22,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:22,548 INFO L134 CoverageAnalysis]: Checked inductivity of 5565 backedges. 0 proven. 5565 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:22,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1308484754] [2020-10-27 01:03:22,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:22,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57] total 57 [2020-10-27 01:03:22,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329338511] [2020-10-27 01:03:22,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 57 states [2020-10-27 01:03:22,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:22,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2020-10-27 01:03:22,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:03:22,550 INFO L87 Difference]: Start difference. First operand 227 states and 229 transitions. Second operand 57 states. [2020-10-27 01:03:22,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:22,936 INFO L93 Difference]: Finished difference Result 242 states and 246 transitions. [2020-10-27 01:03:22,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-10-27 01:03:22,936 INFO L78 Accepts]: Start accepts. Automaton has 57 states. Word has length 225 [2020-10-27 01:03:22,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:22,938 INFO L225 Difference]: With dead ends: 242 [2020-10-27 01:03:22,938 INFO L226 Difference]: Without dead ends: 234 [2020-10-27 01:03:22,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2020-10-27 01:03:22,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-27 01:03:22,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 231. [2020-10-27 01:03:22,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-27 01:03:22,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 233 transitions. [2020-10-27 01:03:22,945 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 233 transitions. Word has length 225 [2020-10-27 01:03:22,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:22,945 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 233 transitions. [2020-10-27 01:03:22,945 INFO L482 AbstractCegarLoop]: Interpolant automaton has 57 states. [2020-10-27 01:03:22,945 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 233 transitions. [2020-10-27 01:03:22,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-27 01:03:22,946 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:22,947 INFO L422 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:22,947 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:03:22,947 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:22,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:22,947 INFO L82 PathProgramCache]: Analyzing trace with hash -235408474, now seen corresponding path program 44 times [2020-10-27 01:03:22,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:22,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717560779] [2020-10-27 01:03:22,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:23,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:23,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 56 [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 218 [2020-10-27 01:03:27,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:29,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:29,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:29,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:29,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:29,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:29,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:29,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:03:29,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:29,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:30,030 INFO L134 CoverageAnalysis]: Checked inductivity of 5778 backedges. 0 proven. 5778 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:30,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717560779] [2020-10-27 01:03:30,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:30,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58] total 58 [2020-10-27 01:03:30,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993503700] [2020-10-27 01:03:30,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 58 states [2020-10-27 01:03:30,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:30,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2020-10-27 01:03:30,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:03:30,033 INFO L87 Difference]: Start difference. First operand 231 states and 233 transitions. Second operand 58 states. [2020-10-27 01:03:30,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:30,447 INFO L93 Difference]: Finished difference Result 246 states and 250 transitions. [2020-10-27 01:03:30,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-27 01:03:30,447 INFO L78 Accepts]: Start accepts. Automaton has 58 states. Word has length 229 [2020-10-27 01:03:30,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:30,449 INFO L225 Difference]: With dead ends: 246 [2020-10-27 01:03:30,450 INFO L226 Difference]: Without dead ends: 238 [2020-10-27 01:03:30,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2020-10-27 01:03:30,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-27 01:03:30,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 235. [2020-10-27 01:03:30,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 235 states. [2020-10-27 01:03:30,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 237 transitions. [2020-10-27 01:03:30,457 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 237 transitions. Word has length 229 [2020-10-27 01:03:30,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:30,457 INFO L481 AbstractCegarLoop]: Abstraction has 235 states and 237 transitions. [2020-10-27 01:03:30,457 INFO L482 AbstractCegarLoop]: Interpolant automaton has 58 states. [2020-10-27 01:03:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 237 transitions. [2020-10-27 01:03:30,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 01:03:30,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:30,459 INFO L422 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:30,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:03:30,459 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:30,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:30,460 INFO L82 PathProgramCache]: Analyzing trace with hash 98789503, now seen corresponding path program 45 times [2020-10-27 01:03:30,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:30,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1882243495] [2020-10-27 01:03:30,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:30,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:30,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:30,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:35,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:35,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 241 [2020-10-27 01:03:35,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:03:35,513 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:03:35,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:35,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 57 [2020-10-27 01:03:35,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:35,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 222 [2020-10-27 01:03:35,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:37,582 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:37,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:37,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:37,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:37,633 INFO L134 CoverageAnalysis]: Checked inductivity of 5995 backedges. 0 proven. 5995 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:37,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1882243495] [2020-10-27 01:03:37,633 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:37,633 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59] total 59 [2020-10-27 01:03:37,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141507148] [2020-10-27 01:03:37,634 INFO L461 AbstractCegarLoop]: Interpolant automaton has 59 states [2020-10-27 01:03:37,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:37,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2020-10-27 01:03:37,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:03:37,634 INFO L87 Difference]: Start difference. First operand 235 states and 237 transitions. Second operand 59 states. [2020-10-27 01:03:37,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:37,929 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2020-10-27 01:03:37,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2020-10-27 01:03:37,930 INFO L78 Accepts]: Start accepts. Automaton has 59 states. Word has length 233 [2020-10-27 01:03:37,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:37,932 INFO L225 Difference]: With dead ends: 250 [2020-10-27 01:03:37,932 INFO L226 Difference]: Without dead ends: 242 [2020-10-27 01:03:37,933 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2020-10-27 01:03:37,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2020-10-27 01:03:37,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 239. [2020-10-27 01:03:37,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 239 states. [2020-10-27 01:03:37,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 241 transitions. [2020-10-27 01:03:37,939 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 241 transitions. Word has length 233 [2020-10-27 01:03:37,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:37,940 INFO L481 AbstractCegarLoop]: Abstraction has 239 states and 241 transitions. [2020-10-27 01:03:37,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 59 states. [2020-10-27 01:03:37,940 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 241 transitions. [2020-10-27 01:03:37,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-27 01:03:37,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:37,941 INFO L422 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:37,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:03:37,942 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:37,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:37,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1696151336, now seen corresponding path program 46 times [2020-10-27 01:03:37,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:37,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [244058026] [2020-10-27 01:03:37,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:38,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:38,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:42,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:42,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-27 01:03:42,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:03:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:03:42,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-27 01:03:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:42,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 226 [2020-10-27 01:03:42,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:45,079 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:45,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:45,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:45,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:45,086 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:45,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:03:45,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:45,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:45,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:45,131 INFO L134 CoverageAnalysis]: Checked inductivity of 6216 backedges. 0 proven. 6216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:45,131 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [244058026] [2020-10-27 01:03:45,131 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:45,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60] total 60 [2020-10-27 01:03:45,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868977143] [2020-10-27 01:03:45,132 INFO L461 AbstractCegarLoop]: Interpolant automaton has 60 states [2020-10-27 01:03:45,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:45,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2020-10-27 01:03:45,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:03:45,134 INFO L87 Difference]: Start difference. First operand 239 states and 241 transitions. Second operand 60 states. [2020-10-27 01:03:45,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:45,497 INFO L93 Difference]: Finished difference Result 254 states and 258 transitions. [2020-10-27 01:03:45,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-10-27 01:03:45,497 INFO L78 Accepts]: Start accepts. Automaton has 60 states. Word has length 237 [2020-10-27 01:03:45,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:45,499 INFO L225 Difference]: With dead ends: 254 [2020-10-27 01:03:45,499 INFO L226 Difference]: Without dead ends: 246 [2020-10-27 01:03:45,500 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2020-10-27 01:03:45,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-27 01:03:45,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 243. [2020-10-27 01:03:45,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-27 01:03:45,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 245 transitions. [2020-10-27 01:03:45,506 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 245 transitions. Word has length 237 [2020-10-27 01:03:45,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:45,506 INFO L481 AbstractCegarLoop]: Abstraction has 243 states and 245 transitions. [2020-10-27 01:03:45,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 60 states. [2020-10-27 01:03:45,506 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 245 transitions. [2020-10-27 01:03:45,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-27 01:03:45,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:45,508 INFO L422 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:45,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:03:45,508 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:45,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:45,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1142969521, now seen corresponding path program 47 times [2020-10-27 01:03:45,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:45,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1310787990] [2020-10-27 01:03:45,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:45,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:45,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:45,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 249 [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 59 [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 230 [2020-10-27 01:03:50,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:52,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:03:52,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:52,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:52,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:52,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:03:52,911 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:03:52,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:03:52,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:52,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:03:52,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:03:52,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:03:52,912 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:03:52,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6441 backedges. 0 proven. 6441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:03:52,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1310787990] [2020-10-27 01:03:52,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:03:52,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61] total 61 [2020-10-27 01:03:52,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717414755] [2020-10-27 01:03:52,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 61 states [2020-10-27 01:03:52,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:03:52,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2020-10-27 01:03:52,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:03:52,994 INFO L87 Difference]: Start difference. First operand 243 states and 245 transitions. Second operand 61 states. [2020-10-27 01:03:53,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:03:53,477 INFO L93 Difference]: Finished difference Result 258 states and 262 transitions. [2020-10-27 01:03:53,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2020-10-27 01:03:53,478 INFO L78 Accepts]: Start accepts. Automaton has 61 states. Word has length 241 [2020-10-27 01:03:53,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:03:53,479 INFO L225 Difference]: With dead ends: 258 [2020-10-27 01:03:53,480 INFO L226 Difference]: Without dead ends: 250 [2020-10-27 01:03:53,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2020-10-27 01:03:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-27 01:03:53,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 247. [2020-10-27 01:03:53,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 247 states. [2020-10-27 01:03:53,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 249 transitions. [2020-10-27 01:03:53,487 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 249 transitions. Word has length 241 [2020-10-27 01:03:53,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:03:53,487 INFO L481 AbstractCegarLoop]: Abstraction has 247 states and 249 transitions. [2020-10-27 01:03:53,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 61 states. [2020-10-27 01:03:53,488 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 249 transitions. [2020-10-27 01:03:53,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2020-10-27 01:03:53,489 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:03:53,489 INFO L422 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:03:53,490 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:03:53,490 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:03:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:03:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1536052234, now seen corresponding path program 48 times [2020-10-27 01:03:53,490 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:03:53,490 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1683838583] [2020-10-27 01:03:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:03:53,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:03:53,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:53,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:03:58,577 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:03:58,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 253 [2020-10-27 01:03:58,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:03:58,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-27 01:03:58,578 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:03:58,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 60 [2020-10-27 01:03:58,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:03:58,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 234 [2020-10-27 01:03:58,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:04:01,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:04:01,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:04:01,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:04:01,304 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:04:01,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6670 backedges. 0 proven. 6670 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:04:01,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1683838583] [2020-10-27 01:04:01,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:04:01,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62] total 62 [2020-10-27 01:04:01,355 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995091554] [2020-10-27 01:04:01,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 62 states [2020-10-27 01:04:01,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:04:01,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2020-10-27 01:04:01,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 01:04:01,356 INFO L87 Difference]: Start difference. First operand 247 states and 249 transitions. Second operand 62 states. [2020-10-27 01:04:01,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:04:01,693 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2020-10-27 01:04:01,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2020-10-27 01:04:01,694 INFO L78 Accepts]: Start accepts. Automaton has 62 states. Word has length 245 [2020-10-27 01:04:01,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:04:01,696 INFO L225 Difference]: With dead ends: 262 [2020-10-27 01:04:01,697 INFO L226 Difference]: Without dead ends: 254 [2020-10-27 01:04:01,697 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2020-10-27 01:04:01,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-27 01:04:01,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 251. [2020-10-27 01:04:01,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 01:04:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 253 transitions. [2020-10-27 01:04:01,704 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 253 transitions. Word has length 245 [2020-10-27 01:04:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:04:01,705 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 253 transitions. [2020-10-27 01:04:01,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 62 states. [2020-10-27 01:04:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 253 transitions. [2020-10-27 01:04:01,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2020-10-27 01:04:01,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:04:01,706 INFO L422 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:04:01,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:04:01,707 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:04:01,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:04:01,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1844515101, now seen corresponding path program 49 times [2020-10-27 01:04:01,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:04:01,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1379327254] [2020-10-27 01:04:01,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:04:01,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:04:01,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:04:01,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:04:06,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:04:06,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-27 01:04:06,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:04:06,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:04:06,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:04:06,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 61 [2020-10-27 01:04:06,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:04:06,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 238 [2020-10-27 01:04:06,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:04:09,323 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:04:09,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:04:09,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:04:09,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:04:09,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6903 backedges. 0 proven. 6903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:04:09,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1379327254] [2020-10-27 01:04:09,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:04:09,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63] total 63 [2020-10-27 01:04:09,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446697969] [2020-10-27 01:04:09,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 63 states [2020-10-27 01:04:09,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:04:09,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2020-10-27 01:04:09,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:04:09,401 INFO L87 Difference]: Start difference. First operand 251 states and 253 transitions. Second operand 63 states. [2020-10-27 01:04:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:04:09,900 INFO L93 Difference]: Finished difference Result 266 states and 270 transitions. [2020-10-27 01:04:09,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-10-27 01:04:09,900 INFO L78 Accepts]: Start accepts. Automaton has 63 states. Word has length 249 [2020-10-27 01:04:09,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:04:09,903 INFO L225 Difference]: With dead ends: 266 [2020-10-27 01:04:09,903 INFO L226 Difference]: Without dead ends: 258 [2020-10-27 01:04:09,904 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2020-10-27 01:04:09,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-27 01:04:09,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 255. [2020-10-27 01:04:09,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 255 states. [2020-10-27 01:04:09,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 257 transitions. [2020-10-27 01:04:09,910 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 257 transitions. Word has length 249 [2020-10-27 01:04:09,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:04:09,910 INFO L481 AbstractCegarLoop]: Abstraction has 255 states and 257 transitions. [2020-10-27 01:04:09,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 63 states. [2020-10-27 01:04:09,910 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 257 transitions. [2020-10-27 01:04:09,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-27 01:04:09,912 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:04:09,912 INFO L422 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:04:09,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:04:09,912 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:04:09,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:04:09,913 INFO L82 PathProgramCache]: Analyzing trace with hash 2137029948, now seen corresponding path program 50 times [2020-10-27 01:04:09,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:04:09,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1424936877] [2020-10-27 01:04:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:04:09,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:04:10,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:04:10,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:04:14,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:04:14,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 261 [2020-10-27 01:04:14,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:04:14,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-27 01:04:14,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:04:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 62 [2020-10-27 01:04:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:04:14,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 242 [2020-10-27 01:04:14,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:04:17,671 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:04:17,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:04:17,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:04:17,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:04:17,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:04:17,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:04:17,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:04:17,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:04:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:04:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:04:17,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:04:17,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:04:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7140 backedges. 0 proven. 7140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:04:17,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1424936877] [2020-10-27 01:04:17,736 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:04:17,736 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64] total 64 [2020-10-27 01:04:17,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825437615] [2020-10-27 01:04:17,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 64 states [2020-10-27 01:04:17,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:04:17,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2020-10-27 01:04:17,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 01:04:17,737 INFO L87 Difference]: Start difference. First operand 255 states and 257 transitions. Second operand 64 states. [2020-10-27 01:04:18,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:04:18,128 INFO L93 Difference]: Finished difference Result 270 states and 274 transitions. [2020-10-27 01:04:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-27 01:04:18,129 INFO L78 Accepts]: Start accepts. Automaton has 64 states. Word has length 253 [2020-10-27 01:04:18,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:04:18,131 INFO L225 Difference]: With dead ends: 270 [2020-10-27 01:04:18,131 INFO L226 Difference]: Without dead ends: 262 [2020-10-27 01:04:18,131 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2020-10-27 01:04:18,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-27 01:04:18,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 259. [2020-10-27 01:04:18,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 259 states. [2020-10-27 01:04:18,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 261 transitions. [2020-10-27 01:04:18,138 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 261 transitions. Word has length 253 [2020-10-27 01:04:18,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:04:18,138 INFO L481 AbstractCegarLoop]: Abstraction has 259 states and 261 transitions. [2020-10-27 01:04:18,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 64 states. [2020-10-27 01:04:18,139 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 261 transitions. [2020-10-27 01:04:18,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-27 01:04:18,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:04:18,140 INFO L422 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:04:18,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:04:18,141 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:04:18,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:04:18,141 INFO L82 PathProgramCache]: Analyzing trace with hash 841037589, now seen corresponding path program 51 times [2020-10-27 01:04:18,141 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:04:18,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1135763637] [2020-10-27 01:04:18,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:04:18,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:04:18,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:04:18,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking...