/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:21:11,744 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:21:11,747 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:21:11,783 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:21:11,784 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:21:11,786 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:21:11,787 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:21:11,790 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:21:11,792 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:21:11,794 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:21:11,795 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:21:11,797 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:21:11,797 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:21:11,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:21:11,800 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:21:11,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:21:11,803 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:21:11,804 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:21:11,821 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:21:11,825 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:21:11,830 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:21:11,832 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:21:11,835 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:21:11,837 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:21:11,850 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:21:11,851 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:21:11,851 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:21:11,854 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:21:11,855 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:21:11,856 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:21:11,856 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:21:11,857 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:21:11,859 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:21:11,861 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:21:11,862 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:21:11,863 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:21:11,863 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:21:11,864 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:21:11,864 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:21:11,865 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:21:11,866 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:21:11,867 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:21:11,935 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:21:11,935 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:21:11,936 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:21:11,937 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:21:11,937 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:21:11,937 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:21:11,937 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:21:11,938 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:21:11,938 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:21:11,938 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:21:11,938 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:21:11,938 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:21:11,939 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:21:11,939 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:21:11,940 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:21:11,940 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:21:11,940 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:21:11,940 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:21:11,941 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:21:11,941 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:21:11,941 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:21:11,941 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:21:11,942 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:21:11,942 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:21:11,942 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:21:11,942 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:21:11,942 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:21:11,943 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:21:11,943 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:21:11,944 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:21:12,371 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:21:12,400 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:21:12,403 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:21:12,405 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:21:12,405 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:21:12,407 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2020-10-26 19:21:12,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d07ea070b/a802a077ae044601958b93365825eaf1/FLAG8ecaaa4ad [2020-10-26 19:21:13,207 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:21:13,208 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy9_ground-2.i [2020-10-26 19:21:13,217 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d07ea070b/a802a077ae044601958b93365825eaf1/FLAG8ecaaa4ad [2020-10-26 19:21:13,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d07ea070b/a802a077ae044601958b93365825eaf1 [2020-10-26 19:21:13,561 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:21:13,570 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:21:13,574 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:13,574 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:21:13,578 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:21:13,579 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,584 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@593054a1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13, skipping insertion in model container [2020-10-26 19:21:13,584 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,592 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:21:13,617 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:21:13,785 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:13,794 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:21:13,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:21:13,843 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:21:13,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13 WrapperNode [2020-10-26 19:21:13,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:21:13,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:21:13,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:21:13,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:21:13,858 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,859 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,869 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,883 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,892 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,895 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (1/1) ... [2020-10-26 19:21:13,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:21:13,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:21:13,900 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:21:13,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:21:13,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:21:13,980 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:21:13,981 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:21:13,981 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:21:13,981 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:21:13,981 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:21:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:21:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:21:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:21:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:21:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:21:13,982 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:21:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:21:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:21:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:21:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:21:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:21:13,983 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:21:13,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:21:13,984 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:21:13,984 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:21:14,590 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:21:14,591 INFO L298 CfgBuilder]: Removed 11 assume(true) statements. [2020-10-26 19:21:14,593 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:14 BoogieIcfgContainer [2020-10-26 19:21:14,593 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:21:14,595 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:21:14,595 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:21:14,599 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:21:14,599 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:21:13" (1/3) ... [2020-10-26 19:21:14,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c43ca39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:14, skipping insertion in model container [2020-10-26 19:21:14,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:21:13" (2/3) ... [2020-10-26 19:21:14,600 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c43ca39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:21:14, skipping insertion in model container [2020-10-26 19:21:14,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:21:14" (3/3) ... [2020-10-26 19:21:14,602 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy9_ground-2.i [2020-10-26 19:21:14,615 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:21:14,621 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:21:14,635 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:21:14,665 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:21:14,666 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:21:14,666 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:21:14,666 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:21:14,666 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:21:14,666 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:21:14,667 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:21:14,667 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:21:14,686 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-10-26 19:21:14,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:21:14,694 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:14,695 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:14,695 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:14,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:14,702 INFO L82 PathProgramCache]: Analyzing trace with hash -706380544, now seen corresponding path program 1 times [2020-10-26 19:21:14,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:14,716 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069282798] [2020-10-26 19:21:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:14,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:14,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:15,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:16,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:17,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:17,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:21:17,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:17,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2830 [2020-10-26 19:21:17,704 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:17,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:17,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:21:17,704 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:17,705 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:21:17,793 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:17,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:17,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:17,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:17,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:17,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:17,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:21:17,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:17,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:17,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:17,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:17,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:17,814 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:17,815 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069282798] [2020-10-26 19:21:17,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:21:17,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:21:17,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997524425] [2020-10-26 19:21:17,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:21:17,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:17,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:21:17,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:21:17,841 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 3 states. [2020-10-26 19:21:18,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:18,088 INFO L93 Difference]: Finished difference Result 101 states and 147 transitions. [2020-10-26 19:21:18,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:21:18,090 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 33 [2020-10-26 19:21:18,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:18,098 INFO L225 Difference]: With dead ends: 101 [2020-10-26 19:21:18,099 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:21:18,102 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:21:18,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:21:18,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-26 19:21:18,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:21:18,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2020-10-26 19:21:18,146 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 33 [2020-10-26 19:21:18,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:18,147 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2020-10-26 19:21:18,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:21:18,147 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2020-10-26 19:21:18,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-26 19:21:18,148 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:18,149 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:18,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:21:18,149 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:18,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:18,150 INFO L82 PathProgramCache]: Analyzing trace with hash -1329797022, now seen corresponding path program 1 times [2020-10-26 19:21:18,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:18,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184282961] [2020-10-26 19:21:18,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:18,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,349 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:18,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:23,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-26 19:21:23,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:23,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:21:23,184 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:21:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:23,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:21:23,185 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:23,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:23,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:23,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:23,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:23,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:23,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:23,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:23,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:23,261 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:23,261 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:23,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:23,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184282961] [2020-10-26 19:21:23,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:21:23,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:21:23,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101762563] [2020-10-26 19:21:23,269 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:21:23,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:23,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:21:23,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:21:23,275 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand 4 states. [2020-10-26 19:21:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:23,582 INFO L93 Difference]: Finished difference Result 90 states and 110 transitions. [2020-10-26 19:21:23,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:21:23,583 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-26 19:21:23,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:23,584 INFO L225 Difference]: With dead ends: 90 [2020-10-26 19:21:23,585 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:21:23,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:21:23,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:21:23,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2020-10-26 19:21:23,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-26 19:21:23,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2020-10-26 19:21:23,606 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 33 [2020-10-26 19:21:23,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:23,608 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2020-10-26 19:21:23,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:21:23,608 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2020-10-26 19:21:23,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-26 19:21:23,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:23,611 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:23,612 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:21:23,612 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:23,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:23,615 INFO L82 PathProgramCache]: Analyzing trace with hash -377888576, now seen corresponding path program 1 times [2020-10-26 19:21:23,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:23,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [464077065] [2020-10-26 19:21:23,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:23,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:23,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:23,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:24,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:28,652 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:28,653 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-26 19:21:28,653 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:28,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:21:28,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:28,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:21:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:28,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:21:28,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:21:28,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:28,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:28,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:28,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:28,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:28,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:21:28,756 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:28,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:28,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:28,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:28,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:28,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:28,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [464077065] [2020-10-26 19:21:28,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:28,767 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:21:28,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096847461] [2020-10-26 19:21:28,769 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:21:28,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:28,771 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:21:28,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:21:28,774 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand 5 states. [2020-10-26 19:21:29,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:29,042 INFO L93 Difference]: Finished difference Result 92 states and 112 transitions. [2020-10-26 19:21:29,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:21:29,044 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-26 19:21:29,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:29,046 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:21:29,046 INFO L226 Difference]: Without dead ends: 52 [2020-10-26 19:21:29,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:21:29,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-26 19:21:29,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2020-10-26 19:21:29,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-26 19:21:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2020-10-26 19:21:29,068 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 35 [2020-10-26 19:21:29,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:29,068 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2020-10-26 19:21:29,068 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:21:29,069 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2020-10-26 19:21:29,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:21:29,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:29,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:29,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:21:29,072 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:29,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:29,073 INFO L82 PathProgramCache]: Analyzing trace with hash -421906018, now seen corresponding path program 2 times [2020-10-26 19:21:29,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:29,073 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [845060286] [2020-10-26 19:21:29,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:29,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:29,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:30,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:34,098 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:21:34,098 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:34,098 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:21:34,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:21:34,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:34,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:21:34,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:34,186 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:34,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:34,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,196 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:34,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:34,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:34,197 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:21:34,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:34,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:34,198 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:34,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:34,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [845060286] [2020-10-26 19:21:34,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:34,205 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:21:34,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279953425] [2020-10-26 19:21:34,205 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:21:34,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:34,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:21:34,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:21:34,208 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand 6 states. [2020-10-26 19:21:34,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:34,463 INFO L93 Difference]: Finished difference Result 94 states and 114 transitions. [2020-10-26 19:21:34,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:21:34,464 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-26 19:21:34,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:34,465 INFO L225 Difference]: With dead ends: 94 [2020-10-26 19:21:34,465 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:21:34,466 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:21:34,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:21:34,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2020-10-26 19:21:34,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-26 19:21:34,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 63 transitions. [2020-10-26 19:21:34,474 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 63 transitions. Word has length 37 [2020-10-26 19:21:34,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:34,475 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 63 transitions. [2020-10-26 19:21:34,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:21:34,475 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 63 transitions. [2020-10-26 19:21:34,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-26 19:21:34,477 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:34,477 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:34,477 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:21:34,477 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:34,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:34,478 INFO L82 PathProgramCache]: Analyzing trace with hash 227005180, now seen corresponding path program 3 times [2020-10-26 19:21:34,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:34,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050696044] [2020-10-26 19:21:34,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:34,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:34,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:36,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:39,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:39,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-26 19:21:39,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:39,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:21:39,504 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:21:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:39,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:21:39,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:39,610 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:39,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:39,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:39,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:39,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:39,617 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:39,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:39,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:39,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:39,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:39,618 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:39,622 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:39,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050696044] [2020-10-26 19:21:39,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:39,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:21:39,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245710993] [2020-10-26 19:21:39,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:21:39,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:39,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:21:39,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:21:39,625 INFO L87 Difference]: Start difference. First operand 53 states and 63 transitions. Second operand 7 states. [2020-10-26 19:21:39,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:39,848 INFO L93 Difference]: Finished difference Result 96 states and 116 transitions. [2020-10-26 19:21:39,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:21:39,849 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 39 [2020-10-26 19:21:39,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:39,850 INFO L225 Difference]: With dead ends: 96 [2020-10-26 19:21:39,851 INFO L226 Difference]: Without dead ends: 56 [2020-10-26 19:21:39,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:21:39,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-26 19:21:39,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2020-10-26 19:21:39,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-26 19:21:39,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2020-10-26 19:21:39,859 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 39 [2020-10-26 19:21:39,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:39,859 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2020-10-26 19:21:39,859 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:21:39,859 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2020-10-26 19:21:39,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-26 19:21:39,861 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:39,861 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:39,861 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:21:39,862 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:39,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:39,863 INFO L82 PathProgramCache]: Analyzing trace with hash 1060408538, now seen corresponding path program 4 times [2020-10-26 19:21:39,863 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:39,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482925645] [2020-10-26 19:21:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:39,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:39,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:39,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:39,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:40,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:43,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:44,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:44,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-26 19:21:44,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:44,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:21:44,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:21:44,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:44,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:21:44,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:21:45,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:45,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:45,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:45,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:45,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:45,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:45,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:45,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:45,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:45,028 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:45,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482925645] [2020-10-26 19:21:45,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:45,030 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:21:45,030 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887388265] [2020-10-26 19:21:45,030 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:21:45,031 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:45,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:21:45,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:21:45,032 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand 8 states. [2020-10-26 19:21:45,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:45,309 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2020-10-26 19:21:45,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:21:45,310 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-26 19:21:45,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:45,311 INFO L225 Difference]: With dead ends: 98 [2020-10-26 19:21:45,311 INFO L226 Difference]: Without dead ends: 58 [2020-10-26 19:21:45,312 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 [2020-10-26 19:21:45,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-26 19:21:45,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2020-10-26 19:21:45,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:21:45,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 67 transitions. [2020-10-26 19:21:45,320 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 67 transitions. Word has length 41 [2020-10-26 19:21:45,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:45,321 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 67 transitions. [2020-10-26 19:21:45,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:21:45,321 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 67 transitions. [2020-10-26 19:21:45,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:21:45,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:45,322 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:45,322 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:21:45,323 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1197848776, now seen corresponding path program 5 times [2020-10-26 19:21:45,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:45,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964378828] [2020-10-26 19:21:45,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:45,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:45,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:46,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:50,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:21:50,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:50,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:21:50,340 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:21:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:50,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:21:50,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:50,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:50,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:50,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:50,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:50,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:50,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:21:50,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:50,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:50,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:50,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:50,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:50,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964378828] [2020-10-26 19:21:50,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:50,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:21:50,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014150818] [2020-10-26 19:21:50,508 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:21:50,508 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:50,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:21:50,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:21:50,510 INFO L87 Difference]: Start difference. First operand 57 states and 67 transitions. Second operand 9 states. [2020-10-26 19:21:50,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:50,709 INFO L93 Difference]: Finished difference Result 100 states and 120 transitions. [2020-10-26 19:21:50,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:21:50,711 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 43 [2020-10-26 19:21:50,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:50,713 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:21:50,714 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:21:50,717 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 [2020-10-26 19:21:50,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:21:50,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2020-10-26 19:21:50,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-26 19:21:50,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 69 transitions. [2020-10-26 19:21:50,733 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 69 transitions. Word has length 43 [2020-10-26 19:21:50,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:50,734 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 69 transitions. [2020-10-26 19:21:50,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:21:50,734 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 69 transitions. [2020-10-26 19:21:50,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-26 19:21:50,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:50,736 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:50,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:21:50,737 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:50,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:50,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1870324246, now seen corresponding path program 6 times [2020-10-26 19:21:50,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:50,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967828405] [2020-10-26 19:21:50,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:50,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:50,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:50,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:51,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:55,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:55,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:55,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-26 19:21:55,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:21:55,763 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:21:55,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:55,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:21:55,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:21:55,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:21:55,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:55,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:21:55,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:55,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:55,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:21:55,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:21:55,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:21:55,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:21:55,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:21:55,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:21:55,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:21:55,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:21:55,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:21:55,893 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:21:55,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967828405] [2020-10-26 19:21:55,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:21:55,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:21:55,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111931992] [2020-10-26 19:21:55,895 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:21:55,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:21:55,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:21:55,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:21:55,896 INFO L87 Difference]: Start difference. First operand 59 states and 69 transitions. Second operand 10 states. [2020-10-26 19:21:56,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:21:56,108 INFO L93 Difference]: Finished difference Result 102 states and 122 transitions. [2020-10-26 19:21:56,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:21:56,108 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 45 [2020-10-26 19:21:56,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:21:56,110 INFO L225 Difference]: With dead ends: 102 [2020-10-26 19:21:56,110 INFO L226 Difference]: Without dead ends: 62 [2020-10-26 19:21:56,112 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 [2020-10-26 19:21:56,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-26 19:21:56,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2020-10-26 19:21:56,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-26 19:21:56,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 71 transitions. [2020-10-26 19:21:56,133 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 71 transitions. Word has length 45 [2020-10-26 19:21:56,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:21:56,133 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 71 transitions. [2020-10-26 19:21:56,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:21:56,133 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 71 transitions. [2020-10-26 19:21:56,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:21:56,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:21:56,134 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:21:56,135 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:21:56,135 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:21:56,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:21:56,136 INFO L82 PathProgramCache]: Analyzing trace with hash -257933964, now seen corresponding path program 7 times [2020-10-26 19:21:56,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:21:56,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10339531] [2020-10-26 19:21:56,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:21:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:21:56,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,783 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:21:56,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:00,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,162 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:01,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:22:01,163 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:01,163 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:22:01,163 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:22:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:01,163 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:22:01,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:01,305 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:01,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:01,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,311 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:01,311 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:01,311 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:01,311 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:01,311 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:01,312 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:01,312 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:01,317 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:01,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10339531] [2020-10-26 19:22:01,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:01,318 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:22:01,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609666286] [2020-10-26 19:22:01,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:22:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:01,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:22:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:22:01,320 INFO L87 Difference]: Start difference. First operand 61 states and 71 transitions. Second operand 11 states. [2020-10-26 19:22:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:01,511 INFO L93 Difference]: Finished difference Result 104 states and 124 transitions. [2020-10-26 19:22:01,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:22:01,511 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 47 [2020-10-26 19:22:01,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:01,513 INFO L225 Difference]: With dead ends: 104 [2020-10-26 19:22:01,513 INFO L226 Difference]: Without dead ends: 64 [2020-10-26 19:22:01,514 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 [2020-10-26 19:22:01,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-26 19:22:01,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2020-10-26 19:22:01,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-26 19:22:01,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 73 transitions. [2020-10-26 19:22:01,522 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 73 transitions. Word has length 47 [2020-10-26 19:22:01,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:01,522 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 73 transitions. [2020-10-26 19:22:01,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:22:01,522 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 73 transitions. [2020-10-26 19:22:01,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:22:01,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:01,524 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:01,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:22:01,524 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:01,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:01,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1109640878, now seen corresponding path program 8 times [2020-10-26 19:22:01,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:01,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1939633488] [2020-10-26 19:22:01,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:01,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:01,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:01,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:02,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:06,224 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:06,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:06,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:22:06,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:06,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:22:06,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:06,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:22:06,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:06,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:22:06,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:06,683 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:06,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:06,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:06,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:06,688 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:06,688 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:06,688 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:06,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:06,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:06,689 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:06,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1939633488] [2020-10-26 19:22:06,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:06,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:22:06,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052919149] [2020-10-26 19:22:06,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:22:06,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:06,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:22:06,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:22:06,706 INFO L87 Difference]: Start difference. First operand 63 states and 73 transitions. Second operand 12 states. [2020-10-26 19:22:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:06,948 INFO L93 Difference]: Finished difference Result 106 states and 126 transitions. [2020-10-26 19:22:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:22:06,949 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-26 19:22:06,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:06,950 INFO L225 Difference]: With dead ends: 106 [2020-10-26 19:22:06,950 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:22:06,951 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 [2020-10-26 19:22:06,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:22:06,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2020-10-26 19:22:06,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-26 19:22:06,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 75 transitions. [2020-10-26 19:22:06,959 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 75 transitions. Word has length 49 [2020-10-26 19:22:06,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:06,960 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 75 transitions. [2020-10-26 19:22:06,960 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:22:06,960 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 75 transitions. [2020-10-26 19:22:06,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-26 19:22:06,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:06,961 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:06,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:22:06,961 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:06,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:06,962 INFO L82 PathProgramCache]: Analyzing trace with hash 738768304, now seen corresponding path program 9 times [2020-10-26 19:22:06,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:06,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1351844625] [2020-10-26 19:22:06,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:06,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:06,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:06,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:07,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:10,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:10,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:11,976 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:11,976 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-26 19:22:11,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:11,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:22:11,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:22:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:11,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:22:11,977 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:12,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:12,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:12,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,146 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:12,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:12,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:12,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:22:12,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:12,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:12,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:12,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:12,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:12,153 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:12,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1351844625] [2020-10-26 19:22:12,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:12,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:22:12,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475169634] [2020-10-26 19:22:12,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:22:12,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:12,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:22:12,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:12,156 INFO L87 Difference]: Start difference. First operand 65 states and 75 transitions. Second operand 13 states. [2020-10-26 19:22:12,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:12,364 INFO L93 Difference]: Finished difference Result 108 states and 128 transitions. [2020-10-26 19:22:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:22:12,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 51 [2020-10-26 19:22:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:12,368 INFO L225 Difference]: With dead ends: 108 [2020-10-26 19:22:12,368 INFO L226 Difference]: Without dead ends: 68 [2020-10-26 19:22:12,369 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:22:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-26 19:22:12,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2020-10-26 19:22:12,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:22:12,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 77 transitions. [2020-10-26 19:22:12,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 77 transitions. Word has length 51 [2020-10-26 19:22:12,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:12,382 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 77 transitions. [2020-10-26 19:22:12,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:22:12,382 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 77 transitions. [2020-10-26 19:22:12,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-26 19:22:12,388 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:12,393 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:12,393 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:22:12,394 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:12,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:12,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1056468338, now seen corresponding path program 10 times [2020-10-26 19:22:12,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:12,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150928391] [2020-10-26 19:22:12,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:12,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:12,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:12,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:15,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:15,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:17,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-26 19:22:17,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:17,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:22:17,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:22:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:17,418 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:22:17,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:17,581 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:17,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,588 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:17,588 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:17,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:17,589 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:17,589 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:17,589 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:17,589 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:17,596 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:17,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150928391] [2020-10-26 19:22:17,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:17,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:22:17,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798403907] [2020-10-26 19:22:17,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:22:17,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:17,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:22:17,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:22:17,600 INFO L87 Difference]: Start difference. First operand 67 states and 77 transitions. Second operand 14 states. [2020-10-26 19:22:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:17,786 INFO L93 Difference]: Finished difference Result 110 states and 130 transitions. [2020-10-26 19:22:17,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:22:17,786 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 53 [2020-10-26 19:22:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:17,787 INFO L225 Difference]: With dead ends: 110 [2020-10-26 19:22:17,788 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:22:17,788 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:22:17,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:22:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2020-10-26 19:22:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-26 19:22:17,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 79 transitions. [2020-10-26 19:22:17,803 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 79 transitions. Word has length 53 [2020-10-26 19:22:17,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:17,804 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 79 transitions. [2020-10-26 19:22:17,804 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:22:17,806 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 79 transitions. [2020-10-26 19:22:17,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:22:17,808 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:17,808 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:17,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:22:17,808 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:17,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:17,809 INFO L82 PathProgramCache]: Analyzing trace with hash 297971692, now seen corresponding path program 11 times [2020-10-26 19:22:17,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:17,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712576237] [2020-10-26 19:22:17,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:17,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:17,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:17,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:18,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:18,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:21,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:21,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:22,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:22,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:22:22,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:22:22,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:22:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:22,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:22:22,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:23,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:23,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:23,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:23,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:23,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:23,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:23,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:23,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:23,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:23,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:23,037 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:23,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712576237] [2020-10-26 19:22:23,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:23,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:22:23,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113654426] [2020-10-26 19:22:23,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:22:23,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:23,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:22:23,040 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:22:23,040 INFO L87 Difference]: Start difference. First operand 69 states and 79 transitions. Second operand 15 states. [2020-10-26 19:22:23,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:23,335 INFO L93 Difference]: Finished difference Result 112 states and 132 transitions. [2020-10-26 19:22:23,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:22:23,336 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 55 [2020-10-26 19:22:23,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:23,337 INFO L225 Difference]: With dead ends: 112 [2020-10-26 19:22:23,337 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:22:23,338 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:22:23,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:22:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2020-10-26 19:22:23,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-26 19:22:23,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 81 transitions. [2020-10-26 19:22:23,344 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 81 transitions. Word has length 55 [2020-10-26 19:22:23,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:23,344 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 81 transitions. [2020-10-26 19:22:23,344 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:22:23,344 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 81 transitions. [2020-10-26 19:22:23,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:22:23,345 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:23,345 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:23,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:22:23,346 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:23,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:23,346 INFO L82 PathProgramCache]: Analyzing trace with hash 539749834, now seen corresponding path program 12 times [2020-10-26 19:22:23,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:23,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [689463784] [2020-10-26 19:22:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:23,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:23,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:23,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:25,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:28,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:28,369 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:22:28,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:28,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:22:28,369 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:22:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:28,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:22:28,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:28,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:28,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:28,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:28,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:28,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:28,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:28,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:28,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:28,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:28,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:28,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:28,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [689463784] [2020-10-26 19:22:28,611 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:28,611 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:22:28,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713040332] [2020-10-26 19:22:28,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:22:28,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:28,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:22:28,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:22:28,615 INFO L87 Difference]: Start difference. First operand 71 states and 81 transitions. Second operand 16 states. [2020-10-26 19:22:28,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:28,925 INFO L93 Difference]: Finished difference Result 114 states and 134 transitions. [2020-10-26 19:22:28,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:22:28,926 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 57 [2020-10-26 19:22:28,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:28,927 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:22:28,928 INFO L226 Difference]: Without dead ends: 74 [2020-10-26 19:22:28,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:22:28,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-26 19:22:28,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2020-10-26 19:22:28,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-26 19:22:28,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 83 transitions. [2020-10-26 19:22:28,935 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 83 transitions. Word has length 57 [2020-10-26 19:22:28,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:28,936 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 83 transitions. [2020-10-26 19:22:28,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:22:28,936 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 83 transitions. [2020-10-26 19:22:28,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-26 19:22:28,937 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:28,937 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:28,937 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:22:28,937 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:28,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:28,938 INFO L82 PathProgramCache]: Analyzing trace with hash 960310312, now seen corresponding path program 13 times [2020-10-26 19:22:28,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:28,939 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [32872927] [2020-10-26 19:22:28,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:28,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:28,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:29,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:31,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:33,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:33,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-26 19:22:33,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:22:33,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:22:33,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:33,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:22:33,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:33,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:22:33,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:34,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:34,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:34,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:34,195 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:34,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:34,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:34,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:34,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:34,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:34,202 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:34,203 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [32872927] [2020-10-26 19:22:34,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:34,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:22:34,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49543071] [2020-10-26 19:22:34,204 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:22:34,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:34,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:22:34,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:22:34,205 INFO L87 Difference]: Start difference. First operand 73 states and 83 transitions. Second operand 17 states. [2020-10-26 19:22:34,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:34,425 INFO L93 Difference]: Finished difference Result 116 states and 136 transitions. [2020-10-26 19:22:34,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:22:34,426 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 59 [2020-10-26 19:22:34,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:34,427 INFO L225 Difference]: With dead ends: 116 [2020-10-26 19:22:34,427 INFO L226 Difference]: Without dead ends: 76 [2020-10-26 19:22:34,428 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:22:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-26 19:22:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2020-10-26 19:22:34,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-26 19:22:34,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 85 transitions. [2020-10-26 19:22:34,437 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 85 transitions. Word has length 59 [2020-10-26 19:22:34,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:34,439 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 85 transitions. [2020-10-26 19:22:34,439 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:22:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 85 transitions. [2020-10-26 19:22:34,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:22:34,440 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:34,440 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:34,440 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:22:34,441 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:34,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:34,445 INFO L82 PathProgramCache]: Analyzing trace with hash 1392003846, now seen corresponding path program 14 times [2020-10-26 19:22:34,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:34,445 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1730981273] [2020-10-26 19:22:34,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:34,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:34,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:34,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:34,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:34,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:34,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:34,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:35,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:36,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:37,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:39,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:39,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:22:39,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:22:39,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:22:39,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:39,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:22:39,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:39,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:22:39,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:39,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:39,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:39,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:39,732 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:39,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:39,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:39,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:39,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:39,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:39,741 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:39,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1730981273] [2020-10-26 19:22:39,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:39,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:22:39,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460327612] [2020-10-26 19:22:39,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:22:39,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:39,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:22:39,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:22:39,748 INFO L87 Difference]: Start difference. First operand 75 states and 85 transitions. Second operand 18 states. [2020-10-26 19:22:39,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:39,977 INFO L93 Difference]: Finished difference Result 118 states and 138 transitions. [2020-10-26 19:22:39,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:22:39,978 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 61 [2020-10-26 19:22:39,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:39,979 INFO L225 Difference]: With dead ends: 118 [2020-10-26 19:22:39,979 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:22:39,980 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 [2020-10-26 19:22:39,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:22:39,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2020-10-26 19:22:39,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:22:39,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 87 transitions. [2020-10-26 19:22:39,985 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 87 transitions. Word has length 61 [2020-10-26 19:22:39,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:39,986 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 87 transitions. [2020-10-26 19:22:39,986 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:22:39,986 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 87 transitions. [2020-10-26 19:22:39,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-26 19:22:39,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:39,987 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:39,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:22:39,987 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:39,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:39,988 INFO L82 PathProgramCache]: Analyzing trace with hash -362337692, now seen corresponding path program 15 times [2020-10-26 19:22:39,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:39,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786198514] [2020-10-26 19:22:39,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:40,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:40,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:40,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:40,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:40,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:40,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:40,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:42,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:42,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:22:45,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:45,286 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:45,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,295 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:45,296 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:45,296 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:45,296 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:45,296 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:45,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:45,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:45,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:45,297 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:45,303 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:45,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786198514] [2020-10-26 19:22:45,304 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:45,304 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:22:45,304 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886143234] [2020-10-26 19:22:45,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:22:45,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:45,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:22:45,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:22:45,317 INFO L87 Difference]: Start difference. First operand 77 states and 87 transitions. Second operand 19 states. [2020-10-26 19:22:45,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:45,589 INFO L93 Difference]: Finished difference Result 120 states and 140 transitions. [2020-10-26 19:22:45,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:22:45,590 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 63 [2020-10-26 19:22:45,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:45,591 INFO L225 Difference]: With dead ends: 120 [2020-10-26 19:22:45,591 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:22:45,592 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 [2020-10-26 19:22:45,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:22:45,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2020-10-26 19:22:45,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-26 19:22:45,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 89 transitions. [2020-10-26 19:22:45,604 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 89 transitions. Word has length 63 [2020-10-26 19:22:45,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:45,604 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 89 transitions. [2020-10-26 19:22:45,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:22:45,604 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 89 transitions. [2020-10-26 19:22:45,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:22:45,605 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:45,606 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:45,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:22:45,606 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:45,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:45,607 INFO L82 PathProgramCache]: Analyzing trace with hash 1637591618, now seen corresponding path program 16 times [2020-10-26 19:22:45,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:45,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [304011343] [2020-10-26 19:22:45,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:45,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:45,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:45,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:46,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:50,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:50,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:22:50,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:22:50,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:22:50,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:22:50,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:22:50,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:50,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:50,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:50,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:50,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:50,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:50,939 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:50,939 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:22:50,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:50,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:50,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:50,947 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:50,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [304011343] [2020-10-26 19:22:50,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:50,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:22:50,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070532260] [2020-10-26 19:22:50,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:22:50,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:50,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:22:50,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:22:50,949 INFO L87 Difference]: Start difference. First operand 79 states and 89 transitions. Second operand 20 states. [2020-10-26 19:22:51,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:51,188 INFO L93 Difference]: Finished difference Result 122 states and 142 transitions. [2020-10-26 19:22:51,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:22:51,189 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 65 [2020-10-26 19:22:51,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:51,190 INFO L225 Difference]: With dead ends: 122 [2020-10-26 19:22:51,190 INFO L226 Difference]: Without dead ends: 82 [2020-10-26 19:22:51,192 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 [2020-10-26 19:22:51,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-26 19:22:51,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2020-10-26 19:22:51,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-26 19:22:51,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 91 transitions. [2020-10-26 19:22:51,201 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 91 transitions. Word has length 65 [2020-10-26 19:22:51,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:51,201 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 91 transitions. [2020-10-26 19:22:51,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:22:51,202 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 91 transitions. [2020-10-26 19:22:51,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:22:51,202 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:51,202 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:51,203 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:22:51,203 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:51,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:51,203 INFO L82 PathProgramCache]: Analyzing trace with hash -575690080, now seen corresponding path program 17 times [2020-10-26 19:22:51,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:51,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1390183224] [2020-10-26 19:22:51,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:51,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:51,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:51,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:51,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:51,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:51,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:53,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:56,233 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:56,234 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:22:56,234 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:22:56,234 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:22:56,234 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:56,234 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:22:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:22:56,235 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:22:56,235 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:56,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:22:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:56,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:56,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:22:56,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:22:56,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:22:56,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:22:56,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:22:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:22:56,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:22:56,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:22:56,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:22:56,563 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:22:56,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1390183224] [2020-10-26 19:22:56,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:22:56,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:22:56,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207719016] [2020-10-26 19:22:56,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:22:56,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:22:56,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:22:56,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:22:56,566 INFO L87 Difference]: Start difference. First operand 81 states and 91 transitions. Second operand 21 states. [2020-10-26 19:22:56,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:22:56,770 INFO L93 Difference]: Finished difference Result 124 states and 144 transitions. [2020-10-26 19:22:56,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:22:56,771 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 67 [2020-10-26 19:22:56,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:22:56,772 INFO L225 Difference]: With dead ends: 124 [2020-10-26 19:22:56,772 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:22:56,773 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 [2020-10-26 19:22:56,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:22:56,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2020-10-26 19:22:56,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-26 19:22:56,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 93 transitions. [2020-10-26 19:22:56,777 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 93 transitions. Word has length 67 [2020-10-26 19:22:56,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:22:56,778 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 93 transitions. [2020-10-26 19:22:56,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:22:56,778 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 93 transitions. [2020-10-26 19:22:56,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:22:56,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:22:56,779 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:22:56,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:22:56,779 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:22:56,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:22:56,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1530590338, now seen corresponding path program 18 times [2020-10-26 19:22:56,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:22:56,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713163354] [2020-10-26 19:22:56,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:22:56,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:22:56,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:56,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:56,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:56,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:56,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:57,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:58,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:58,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:22:59,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:01,804 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:01,804 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:23:01,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-26 19:23:01,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:23:01,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:01,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:23:01,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:01,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:23:01,805 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:02,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:02,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:02,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:02,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:02,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:02,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:02,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:02,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:02,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:02,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:02,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:02,173 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:02,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713163354] [2020-10-26 19:23:02,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:02,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:23:02,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851844981] [2020-10-26 19:23:02,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:23:02,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:02,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:23:02,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:23:02,176 INFO L87 Difference]: Start difference. First operand 83 states and 93 transitions. Second operand 22 states. [2020-10-26 19:23:02,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:02,370 INFO L93 Difference]: Finished difference Result 126 states and 146 transitions. [2020-10-26 19:23:02,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:23:02,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 69 [2020-10-26 19:23:02,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:02,372 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:23:02,372 INFO L226 Difference]: Without dead ends: 86 [2020-10-26 19:23:02,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:23:02,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-26 19:23:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2020-10-26 19:23:02,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-26 19:23:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 95 transitions. [2020-10-26 19:23:02,378 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 95 transitions. Word has length 69 [2020-10-26 19:23:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:02,378 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 95 transitions. [2020-10-26 19:23:02,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:23:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 95 transitions. [2020-10-26 19:23:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-26 19:23:02,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:02,379 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:02,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:23:02,379 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:02,380 INFO L82 PathProgramCache]: Analyzing trace with hash -66736932, now seen corresponding path program 19 times [2020-10-26 19:23:02,380 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:02,380 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1160691304] [2020-10-26 19:23:02,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:02,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:02,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:02,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:02,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:02,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:02,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:03,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:03,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:03,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:07,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:07,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-26 19:23:07,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:07,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:23:07,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:23:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:07,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:23:07,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:07,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:07,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:07,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:07,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:07,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:07,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:07,778 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:07,778 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:07,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:07,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:07,784 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:07,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1160691304] [2020-10-26 19:23:07,785 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:07,785 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:23:07,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718311023] [2020-10-26 19:23:07,785 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:23:07,786 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:07,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:23:07,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:23:07,787 INFO L87 Difference]: Start difference. First operand 85 states and 95 transitions. Second operand 23 states. [2020-10-26 19:23:08,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:08,025 INFO L93 Difference]: Finished difference Result 128 states and 148 transitions. [2020-10-26 19:23:08,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:23:08,026 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 71 [2020-10-26 19:23:08,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:08,028 INFO L225 Difference]: With dead ends: 128 [2020-10-26 19:23:08,028 INFO L226 Difference]: Without dead ends: 88 [2020-10-26 19:23:08,029 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 [2020-10-26 19:23:08,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-26 19:23:08,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2020-10-26 19:23:08,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:23:08,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 97 transitions. [2020-10-26 19:23:08,035 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 97 transitions. Word has length 71 [2020-10-26 19:23:08,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:08,036 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 97 transitions. [2020-10-26 19:23:08,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:23:08,036 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 97 transitions. [2020-10-26 19:23:08,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:23:08,036 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:08,036 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:08,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:23:08,037 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:08,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:08,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2052886854, now seen corresponding path program 20 times [2020-10-26 19:23:08,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:08,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99077030] [2020-10-26 19:23:08,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:08,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:08,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:08,075 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:08,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:08,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:08,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:09,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:13,058 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:23:13,058 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:13,058 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:23:13,058 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:13,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:23:13,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:13,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:23:13,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:13,477 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:13,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:13,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:13,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:13,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:13,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:13,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:13,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:13,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99077030] [2020-10-26 19:23:13,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:13,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:23:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607031240] [2020-10-26 19:23:13,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:23:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:13,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:23:13,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:23:13,490 INFO L87 Difference]: Start difference. First operand 87 states and 97 transitions. Second operand 24 states. [2020-10-26 19:23:13,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:13,815 INFO L93 Difference]: Finished difference Result 130 states and 150 transitions. [2020-10-26 19:23:13,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:23:13,819 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 73 [2020-10-26 19:23:13,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:13,820 INFO L225 Difference]: With dead ends: 130 [2020-10-26 19:23:13,820 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:23:13,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:23:13,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:23:13,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2020-10-26 19:23:13,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-26 19:23:13,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 99 transitions. [2020-10-26 19:23:13,826 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 99 transitions. Word has length 73 [2020-10-26 19:23:13,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:13,826 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 99 transitions. [2020-10-26 19:23:13,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:23:13,826 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 99 transitions. [2020-10-26 19:23:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-26 19:23:13,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:13,827 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:13,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:23:13,828 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:13,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:13,828 INFO L82 PathProgramCache]: Analyzing trace with hash 517484824, now seen corresponding path program 21 times [2020-10-26 19:23:13,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:13,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [489954726] [2020-10-26 19:23:13,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:13,862 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:13,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:15,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:18,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:18,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-26 19:23:18,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:18,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:23:18,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:18,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:23:18,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:18,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:23:18,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:19,328 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:19,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:19,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:19,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:19,333 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:19,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:19,333 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:19,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:19,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:19,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:19,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:19,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:19,343 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:19,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [489954726] [2020-10-26 19:23:19,351 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:19,352 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:23:19,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355638469] [2020-10-26 19:23:19,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:23:19,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:19,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:23:19,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:23:19,357 INFO L87 Difference]: Start difference. First operand 89 states and 99 transitions. Second operand 25 states. [2020-10-26 19:23:19,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:19,649 INFO L93 Difference]: Finished difference Result 132 states and 152 transitions. [2020-10-26 19:23:19,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:23:19,650 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 75 [2020-10-26 19:23:19,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:19,650 INFO L225 Difference]: With dead ends: 132 [2020-10-26 19:23:19,651 INFO L226 Difference]: Without dead ends: 92 [2020-10-26 19:23:19,651 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:23:19,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-26 19:23:19,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2020-10-26 19:23:19,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-26 19:23:19,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 101 transitions. [2020-10-26 19:23:19,657 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 101 transitions. Word has length 75 [2020-10-26 19:23:19,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:19,657 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 101 transitions. [2020-10-26 19:23:19,657 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:23:19,657 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 101 transitions. [2020-10-26 19:23:19,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:23:19,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:19,658 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:19,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:23:19,659 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:19,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:19,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1038472182, now seen corresponding path program 22 times [2020-10-26 19:23:19,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:19,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [970192606] [2020-10-26 19:23:19,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:19,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:19,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:19,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:19,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:19,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:21,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:24,685 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:24,686 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:23:24,686 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:24,686 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:23:24,686 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:24,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:23:24,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:24,686 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:23:24,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:25,172 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:25,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:25,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:25,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:25,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:25,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:25,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:25,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:25,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:25,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:25,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:25,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [970192606] [2020-10-26 19:23:25,185 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:25,185 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:23:25,186 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017286160] [2020-10-26 19:23:25,186 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:23:25,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:25,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:23:25,187 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:23:25,187 INFO L87 Difference]: Start difference. First operand 91 states and 101 transitions. Second operand 26 states. [2020-10-26 19:23:25,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:25,456 INFO L93 Difference]: Finished difference Result 134 states and 154 transitions. [2020-10-26 19:23:25,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:23:25,457 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 77 [2020-10-26 19:23:25,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:25,458 INFO L225 Difference]: With dead ends: 134 [2020-10-26 19:23:25,458 INFO L226 Difference]: Without dead ends: 94 [2020-10-26 19:23:25,459 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:23:25,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-26 19:23:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2020-10-26 19:23:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-26 19:23:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 103 transitions. [2020-10-26 19:23:25,465 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 103 transitions. Word has length 77 [2020-10-26 19:23:25,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:25,465 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 103 transitions. [2020-10-26 19:23:25,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:23:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 103 transitions. [2020-10-26 19:23:25,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:23:25,466 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:25,467 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:25,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:23:25,467 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:25,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:25,467 INFO L82 PathProgramCache]: Analyzing trace with hash -803850412, now seen corresponding path program 23 times [2020-10-26 19:23:25,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:25,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1070991332] [2020-10-26 19:23:25,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:25,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:25,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:25,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:25,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:25,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:26,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:26,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:26,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:26,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:30,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:30,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:23:30,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:23:30,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:23:30,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:23:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:23:30,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:31,024 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:31,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:31,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:31,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:31,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:31,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:31,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:23:31,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:31,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:31,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:31,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:31,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:31,037 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:31,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1070991332] [2020-10-26 19:23:31,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:31,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:23:31,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768177313] [2020-10-26 19:23:31,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:23:31,039 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:31,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:23:31,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:23:31,040 INFO L87 Difference]: Start difference. First operand 93 states and 103 transitions. Second operand 27 states. [2020-10-26 19:23:31,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:31,336 INFO L93 Difference]: Finished difference Result 136 states and 156 transitions. [2020-10-26 19:23:31,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:23:31,337 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 79 [2020-10-26 19:23:31,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:31,338 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:23:31,338 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:23:31,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:23:31,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:23:31,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2020-10-26 19:23:31,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-26 19:23:31,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 105 transitions. [2020-10-26 19:23:31,345 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 105 transitions. Word has length 79 [2020-10-26 19:23:31,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:31,345 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 105 transitions. [2020-10-26 19:23:31,345 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:23:31,345 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 105 transitions. [2020-10-26 19:23:31,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-10-26 19:23:31,346 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:31,346 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:31,347 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:23:31,347 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:31,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:31,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1749337294, now seen corresponding path program 24 times [2020-10-26 19:23:31,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:31,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649165807] [2020-10-26 19:23:31,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:31,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:31,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:31,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:31,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:32,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:32,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:32,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:36,373 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:36,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-26 19:23:36,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:36,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-26 19:23:36,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:36,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:23:36,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:36,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:23:36,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:36,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:36,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:36,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:36,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:36,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:36,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:36,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:36,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:36,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:36,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:36,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:36,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649165807] [2020-10-26 19:23:36,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:36,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:23:36,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575800200] [2020-10-26 19:23:36,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:23:36,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:36,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:23:36,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:23:36,934 INFO L87 Difference]: Start difference. First operand 95 states and 105 transitions. Second operand 28 states. [2020-10-26 19:23:37,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:37,258 INFO L93 Difference]: Finished difference Result 138 states and 158 transitions. [2020-10-26 19:23:37,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:23:37,259 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 81 [2020-10-26 19:23:37,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:37,260 INFO L225 Difference]: With dead ends: 138 [2020-10-26 19:23:37,261 INFO L226 Difference]: Without dead ends: 98 [2020-10-26 19:23:37,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:23:37,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-26 19:23:37,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2020-10-26 19:23:37,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:23:37,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 107 transitions. [2020-10-26 19:23:37,267 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 107 transitions. Word has length 81 [2020-10-26 19:23:37,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:37,267 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 107 transitions. [2020-10-26 19:23:37,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:23:37,268 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 107 transitions. [2020-10-26 19:23:37,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:23:37,268 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:37,269 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:37,269 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:23:37,269 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:37,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:37,269 INFO L82 PathProgramCache]: Analyzing trace with hash 170835856, now seen corresponding path program 25 times [2020-10-26 19:23:37,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:37,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016205751] [2020-10-26 19:23:37,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:37,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:37,295 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:37,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:37,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:37,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:38,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:38,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:38,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:23:42,291 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:42,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:42,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:42,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:42,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:42,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:42,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:42,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:42,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:42,904 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:42,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016205751] [2020-10-26 19:23:42,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:42,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:23:42,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063059994] [2020-10-26 19:23:42,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:23:42,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:42,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:23:42,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:23:42,907 INFO L87 Difference]: Start difference. First operand 97 states and 107 transitions. Second operand 29 states. [2020-10-26 19:23:43,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:43,277 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2020-10-26 19:23:43,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:23:43,278 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 83 [2020-10-26 19:23:43,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:43,279 INFO L225 Difference]: With dead ends: 140 [2020-10-26 19:23:43,279 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:23:43,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:23:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:23:43,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2020-10-26 19:23:43,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-26 19:23:43,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2020-10-26 19:23:43,286 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 83 [2020-10-26 19:23:43,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:43,286 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2020-10-26 19:23:43,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:23:43,286 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2020-10-26 19:23:43,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:23:43,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:43,288 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:43,288 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:23:43,288 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:43,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:43,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1378704274, now seen corresponding path program 26 times [2020-10-26 19:23:43,289 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:43,289 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61243450] [2020-10-26 19:23:43,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:43,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:43,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:43,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:43,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:43,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:44,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:44,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:48,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:48,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:23:48,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:48,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:23:48,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:48,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:23:48,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:48,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:23:48,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:48,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:48,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:48,952 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:48,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:48,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:48,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:23:48,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:48,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:48,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:48,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:48,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-26 19:23:48,969 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:48,969 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61243450] [2020-10-26 19:23:48,969 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:48,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:23:48,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293432408] [2020-10-26 19:23:48,970 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:23:48,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:48,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:23:48,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:23:48,972 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand 30 states. [2020-10-26 19:23:49,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:49,355 INFO L93 Difference]: Finished difference Result 142 states and 162 transitions. [2020-10-26 19:23:49,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:23:49,356 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 85 [2020-10-26 19:23:49,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:49,357 INFO L225 Difference]: With dead ends: 142 [2020-10-26 19:23:49,357 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:23:49,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:23:49,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:23:49,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2020-10-26 19:23:49,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-26 19:23:49,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 111 transitions. [2020-10-26 19:23:49,364 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 111 transitions. Word has length 85 [2020-10-26 19:23:49,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:49,364 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 111 transitions. [2020-10-26 19:23:49,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:23:49,364 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 111 transitions. [2020-10-26 19:23:49,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:23:49,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:49,365 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:49,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:23:49,366 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:49,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:49,366 INFO L82 PathProgramCache]: Analyzing trace with hash -133117492, now seen corresponding path program 27 times [2020-10-26 19:23:49,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:49,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [668887270] [2020-10-26 19:23:49,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:49,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:49,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:49,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:49,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:49,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:50,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:50,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:50,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:54,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:54,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:23:54,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:23:54,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:23:54,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:23:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:23:54,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:23:54,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:55,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:23:55,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:55,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:23:55,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:23:55,080 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:23:55,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [668887270] [2020-10-26 19:23:55,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:23:55,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:23:55,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123766830] [2020-10-26 19:23:55,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:23:55,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:23:55,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:23:55,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:23:55,082 INFO L87 Difference]: Start difference. First operand 101 states and 111 transitions. Second operand 31 states. [2020-10-26 19:23:55,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:23:55,461 INFO L93 Difference]: Finished difference Result 144 states and 164 transitions. [2020-10-26 19:23:55,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:23:55,462 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 87 [2020-10-26 19:23:55,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:23:55,463 INFO L225 Difference]: With dead ends: 144 [2020-10-26 19:23:55,463 INFO L226 Difference]: Without dead ends: 104 [2020-10-26 19:23:55,465 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:23:55,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-26 19:23:55,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2020-10-26 19:23:55,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-26 19:23:55,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 113 transitions. [2020-10-26 19:23:55,470 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 113 transitions. Word has length 87 [2020-10-26 19:23:55,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:23:55,470 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 113 transitions. [2020-10-26 19:23:55,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:23:55,470 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 113 transitions. [2020-10-26 19:23:55,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-26 19:23:55,471 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:23:55,471 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:23:55,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:23:55,472 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:23:55,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:23:55,472 INFO L82 PathProgramCache]: Analyzing trace with hash -1420095574, now seen corresponding path program 28 times [2020-10-26 19:23:55,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:23:55,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1705811812] [2020-10-26 19:23:55,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:23:55,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:23:55,503 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:55,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:55,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:55,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:57,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:57,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:23:57,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:24:00,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:01,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:01,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:01,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:01,198 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:01,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:01,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:01,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:01,199 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:01,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:01,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:01,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:01,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:01,208 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:01,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1705811812] [2020-10-26 19:24:01,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:01,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:24:01,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590548067] [2020-10-26 19:24:01,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:24:01,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:01,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:24:01,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:24:01,210 INFO L87 Difference]: Start difference. First operand 103 states and 113 transitions. Second operand 32 states. [2020-10-26 19:24:01,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:01,628 INFO L93 Difference]: Finished difference Result 146 states and 166 transitions. [2020-10-26 19:24:01,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:24:01,629 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 89 [2020-10-26 19:24:01,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:01,630 INFO L225 Difference]: With dead ends: 146 [2020-10-26 19:24:01,631 INFO L226 Difference]: Without dead ends: 106 [2020-10-26 19:24:01,632 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 [2020-10-26 19:24:01,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-26 19:24:01,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2020-10-26 19:24:01,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-26 19:24:01,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 115 transitions. [2020-10-26 19:24:01,637 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 115 transitions. Word has length 89 [2020-10-26 19:24:01,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:01,637 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 115 transitions. [2020-10-26 19:24:01,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:24:01,637 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 115 transitions. [2020-10-26 19:24:01,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:24:01,638 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:01,638 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:01,638 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:24:01,638 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:01,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:01,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1255451128, now seen corresponding path program 29 times [2020-10-26 19:24:01,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:01,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1121621867] [2020-10-26 19:24:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:01,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:01,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:01,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:01,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:01,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:01,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:01,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:06,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:06,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:24:06,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:06,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:24:06,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:24:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:24:06,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:07,440 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:07,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:07,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:07,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:07,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:07,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:07,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:07,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:07,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:07,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:07,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:07,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:07,454 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:07,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1121621867] [2020-10-26 19:24:07,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:07,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:24:07,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784586852] [2020-10-26 19:24:07,455 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:24:07,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:07,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:24:07,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:07,456 INFO L87 Difference]: Start difference. First operand 105 states and 115 transitions. Second operand 33 states. [2020-10-26 19:24:07,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:07,872 INFO L93 Difference]: Finished difference Result 148 states and 168 transitions. [2020-10-26 19:24:07,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:24:07,872 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 91 [2020-10-26 19:24:07,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:07,873 INFO L225 Difference]: With dead ends: 148 [2020-10-26 19:24:07,873 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:24:07,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:24:07,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:24:07,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2020-10-26 19:24:07,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:24:07,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 117 transitions. [2020-10-26 19:24:07,884 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 117 transitions. Word has length 91 [2020-10-26 19:24:07,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:07,884 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 117 transitions. [2020-10-26 19:24:07,884 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:24:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 117 transitions. [2020-10-26 19:24:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2020-10-26 19:24:07,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:07,885 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:07,886 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:24:07,886 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:07,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:07,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1945928474, now seen corresponding path program 30 times [2020-10-26 19:24:07,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:07,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467403321] [2020-10-26 19:24:07,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:07,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:07,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:07,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:07,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:08,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:08,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:08,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:12,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:12,917 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 103 [2020-10-26 19:24:12,917 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:12,917 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-26 19:24:12,917 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:24:12,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:12,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:24:12,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:13,735 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:13,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:13,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:13,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:13,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:13,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:13,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:13,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:13,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:13,750 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:13,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467403321] [2020-10-26 19:24:13,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:13,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:24:13,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208926281] [2020-10-26 19:24:13,751 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:24:13,751 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:13,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:24:13,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:24:13,752 INFO L87 Difference]: Start difference. First operand 107 states and 117 transitions. Second operand 34 states. [2020-10-26 19:24:14,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:14,027 INFO L93 Difference]: Finished difference Result 150 states and 170 transitions. [2020-10-26 19:24:14,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:24:14,028 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 93 [2020-10-26 19:24:14,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:14,031 INFO L225 Difference]: With dead ends: 150 [2020-10-26 19:24:14,031 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:24:14,032 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:24:14,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:24:14,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2020-10-26 19:24:14,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-26 19:24:14,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 119 transitions. [2020-10-26 19:24:14,040 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 119 transitions. Word has length 93 [2020-10-26 19:24:14,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:14,040 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 119 transitions. [2020-10-26 19:24:14,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:24:14,040 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 119 transitions. [2020-10-26 19:24:14,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-10-26 19:24:14,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:14,042 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:14,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:24:14,043 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:14,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:14,043 INFO L82 PathProgramCache]: Analyzing trace with hash 225272900, now seen corresponding path program 31 times [2020-10-26 19:24:14,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:14,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [202489361] [2020-10-26 19:24:14,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:14,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:14,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:14,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:14,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:14,198 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:14,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:14,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:19,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:19,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-26 19:24:19,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:19,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:24:19,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:24:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:19,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:24:19,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:19,928 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:19,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:19,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:19,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:19,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:19,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:19,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:19,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:19,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:19,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:19,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:19,943 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:19,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [202489361] [2020-10-26 19:24:19,943 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:19,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:24:19,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537549254] [2020-10-26 19:24:19,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:24:19,944 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:19,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:24:19,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:24:19,945 INFO L87 Difference]: Start difference. First operand 109 states and 119 transitions. Second operand 35 states. [2020-10-26 19:24:20,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:20,372 INFO L93 Difference]: Finished difference Result 152 states and 172 transitions. [2020-10-26 19:24:20,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:24:20,372 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 95 [2020-10-26 19:24:20,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:20,374 INFO L225 Difference]: With dead ends: 152 [2020-10-26 19:24:20,374 INFO L226 Difference]: Without dead ends: 112 [2020-10-26 19:24:20,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:24:20,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-26 19:24:20,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2020-10-26 19:24:20,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-26 19:24:20,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-10-26 19:24:20,380 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 95 [2020-10-26 19:24:20,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:20,380 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-10-26 19:24:20,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:24:20,380 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-10-26 19:24:20,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:24:20,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:20,381 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:20,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:24:20,381 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:20,382 INFO L82 PathProgramCache]: Analyzing trace with hash -604312542, now seen corresponding path program 32 times [2020-10-26 19:24:20,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:20,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752661386] [2020-10-26 19:24:20,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:20,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:20,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:20,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:20,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:20,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:20,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:20,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:25,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:25,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:24:25,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:25,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:24:25,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:24:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:25,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:24:25,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:26,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:26,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:26,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:26,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:26,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:26,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:26,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:26,421 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:26,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:26,421 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:26,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:26,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:26,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:26,432 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752661386] [2020-10-26 19:24:26,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:26,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:24:26,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055495586] [2020-10-26 19:24:26,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:24:26,433 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:26,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:24:26,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:24:26,434 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 36 states. [2020-10-26 19:24:26,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:26,879 INFO L93 Difference]: Finished difference Result 154 states and 174 transitions. [2020-10-26 19:24:26,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:24:26,880 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 97 [2020-10-26 19:24:26,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:26,881 INFO L225 Difference]: With dead ends: 154 [2020-10-26 19:24:26,881 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:24:26,882 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:24:26,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:24:26,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2020-10-26 19:24:26,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-26 19:24:26,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 123 transitions. [2020-10-26 19:24:26,887 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 123 transitions. Word has length 97 [2020-10-26 19:24:26,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:26,887 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 123 transitions. [2020-10-26 19:24:26,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:24:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 123 transitions. [2020-10-26 19:24:26,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-26 19:24:26,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:26,888 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:26,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:24:26,888 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:26,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:26,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1027994752, now seen corresponding path program 33 times [2020-10-26 19:24:26,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:26,889 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [137667335] [2020-10-26 19:24:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:26,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:26,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:26,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:26,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:27,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:27,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:27,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:31,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:31,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 109 [2020-10-26 19:24:31,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:31,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:24:31,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:24:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:31,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:24:31,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:32,857 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:32,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:32,862 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:32,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:32,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:32,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:32,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:32,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:32,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:32,863 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:32,863 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:32,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:32,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [137667335] [2020-10-26 19:24:32,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:32,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:24:32,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688107930] [2020-10-26 19:24:32,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:24:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:32,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:24:32,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:24:32,875 INFO L87 Difference]: Start difference. First operand 113 states and 123 transitions. Second operand 37 states. [2020-10-26 19:24:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:33,345 INFO L93 Difference]: Finished difference Result 156 states and 176 transitions. [2020-10-26 19:24:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:24:33,346 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 99 [2020-10-26 19:24:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:33,347 INFO L225 Difference]: With dead ends: 156 [2020-10-26 19:24:33,347 INFO L226 Difference]: Without dead ends: 116 [2020-10-26 19:24:33,348 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:24:33,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-26 19:24:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2020-10-26 19:24:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-26 19:24:33,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2020-10-26 19:24:33,353 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 99 [2020-10-26 19:24:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:33,353 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2020-10-26 19:24:33,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:24:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2020-10-26 19:24:33,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:24:33,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:33,354 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:33,354 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:24:33,354 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:33,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:33,354 INFO L82 PathProgramCache]: Analyzing trace with hash 2012241246, now seen corresponding path program 34 times [2020-10-26 19:24:33,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:33,355 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1988618978] [2020-10-26 19:24:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:33,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:33,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:33,402 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:33,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:33,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:33,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:38,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:38,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:24:38,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:24:38,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-26 19:24:38,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:24:38,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:38,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:24:38,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:39,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:39,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:39,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:39,426 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:39,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:39,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:24:39,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:39,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:39,427 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:39,443 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:39,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1988618978] [2020-10-26 19:24:39,443 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:39,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:24:39,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351667410] [2020-10-26 19:24:39,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:24:39,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:39,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:24:39,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:24:39,446 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand 38 states. [2020-10-26 19:24:39,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:39,866 INFO L93 Difference]: Finished difference Result 158 states and 178 transitions. [2020-10-26 19:24:39,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:24:39,867 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 101 [2020-10-26 19:24:39,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:39,868 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:24:39,868 INFO L226 Difference]: Without dead ends: 118 [2020-10-26 19:24:39,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:24:39,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-26 19:24:39,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2020-10-26 19:24:39,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:24:39,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 127 transitions. [2020-10-26 19:24:39,875 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 127 transitions. Word has length 101 [2020-10-26 19:24:39,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:39,876 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 127 transitions. [2020-10-26 19:24:39,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:24:39,876 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 127 transitions. [2020-10-26 19:24:39,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:24:39,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:39,877 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:39,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:24:39,877 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:39,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:39,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1314650436, now seen corresponding path program 35 times [2020-10-26 19:24:39,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:39,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2058872921] [2020-10-26 19:24:39,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:39,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:39,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:39,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:40,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:40,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:24:44,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:46,000 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:46,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:46,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:46,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:46,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:46,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:24:46,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:46,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:46,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:46,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:46,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:46,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:46,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2058872921] [2020-10-26 19:24:46,018 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:46,018 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:24:46,018 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413046951] [2020-10-26 19:24:46,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:24:46,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:46,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:24:46,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:24:46,020 INFO L87 Difference]: Start difference. First operand 117 states and 127 transitions. Second operand 39 states. [2020-10-26 19:24:46,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:46,389 INFO L93 Difference]: Finished difference Result 160 states and 180 transitions. [2020-10-26 19:24:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:24:46,390 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 103 [2020-10-26 19:24:46,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:46,391 INFO L225 Difference]: With dead ends: 160 [2020-10-26 19:24:46,391 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:24:46,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:24:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:24:46,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2020-10-26 19:24:46,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-26 19:24:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 129 transitions. [2020-10-26 19:24:46,400 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 129 transitions. Word has length 103 [2020-10-26 19:24:46,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:46,401 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 129 transitions. [2020-10-26 19:24:46,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:24:46,401 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 129 transitions. [2020-10-26 19:24:46,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:24:46,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:46,402 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:46,402 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:24:46,402 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:46,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:46,403 INFO L82 PathProgramCache]: Analyzing trace with hash 1293078682, now seen corresponding path program 36 times [2020-10-26 19:24:46,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:46,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995173412] [2020-10-26 19:24:46,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:46,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:46,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:46,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:46,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:46,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:46,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:51,442 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:51,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:24:51,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:24:51,442 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:24:51,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:51,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:24:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:51,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:24:51,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:52,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:52,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:52,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:52,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:52,593 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:52,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995173412] [2020-10-26 19:24:52,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:52,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:24:52,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127360183] [2020-10-26 19:24:52,595 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:24:52,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:52,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:24:52,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:24:52,596 INFO L87 Difference]: Start difference. First operand 119 states and 129 transitions. Second operand 40 states. [2020-10-26 19:24:52,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:52,959 INFO L93 Difference]: Finished difference Result 162 states and 182 transitions. [2020-10-26 19:24:52,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:24:52,960 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 105 [2020-10-26 19:24:52,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:52,961 INFO L225 Difference]: With dead ends: 162 [2020-10-26 19:24:52,961 INFO L226 Difference]: Without dead ends: 122 [2020-10-26 19:24:52,963 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:24:52,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-26 19:24:52,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2020-10-26 19:24:52,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-26 19:24:52,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 131 transitions. [2020-10-26 19:24:52,968 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 131 transitions. Word has length 105 [2020-10-26 19:24:52,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:52,969 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 131 transitions. [2020-10-26 19:24:52,969 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:24:52,969 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 131 transitions. [2020-10-26 19:24:52,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:24:52,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:52,970 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:52,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:24:52,970 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:52,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:52,970 INFO L82 PathProgramCache]: Analyzing trace with hash -940139784, now seen corresponding path program 37 times [2020-10-26 19:24:52,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:52,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877417945] [2020-10-26 19:24:52,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:52,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:53,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:53,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:53,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:53,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:53,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:58,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:58,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:24:58,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:24:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:24:58,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:24:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:24:58,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:24:58,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:59,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:24:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:59,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:59,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:24:59,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:24:59,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:24:59,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:24:59,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:24:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:24:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:24:59,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:24:59,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:24:59,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:24:59,194 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877417945] [2020-10-26 19:24:59,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:24:59,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:24:59,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48977396] [2020-10-26 19:24:59,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:24:59,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:24:59,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:24:59,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:24:59,197 INFO L87 Difference]: Start difference. First operand 121 states and 131 transitions. Second operand 41 states. [2020-10-26 19:24:59,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:24:59,593 INFO L93 Difference]: Finished difference Result 164 states and 184 transitions. [2020-10-26 19:24:59,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:24:59,593 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 107 [2020-10-26 19:24:59,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:24:59,595 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:24:59,595 INFO L226 Difference]: Without dead ends: 124 [2020-10-26 19:24:59,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:24:59,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-26 19:24:59,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2020-10-26 19:24:59,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-26 19:24:59,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 133 transitions. [2020-10-26 19:24:59,604 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 133 transitions. Word has length 107 [2020-10-26 19:24:59,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:24:59,605 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 133 transitions. [2020-10-26 19:24:59,605 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:24:59,605 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 133 transitions. [2020-10-26 19:24:59,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:24:59,606 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:24:59,606 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:24:59,606 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:24:59,606 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:24:59,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:24:59,607 INFO L82 PathProgramCache]: Analyzing trace with hash 420562390, now seen corresponding path program 38 times [2020-10-26 19:24:59,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:24:59,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1335188585] [2020-10-26 19:24:59,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:24:59,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:24:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:59,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:59,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:59,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:24:59,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking...