/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=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --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_copy7_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 08:54:54,641 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 08:54:54,644 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 08:54:54,697 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 08:54:54,698 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 08:54:54,705 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 08:54:54,708 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 08:54:54,713 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 08:54:54,717 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 08:54:54,724 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 08:54:54,726 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 08:54:54,728 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 08:54:54,728 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 08:54:54,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 08:54:54,736 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 08:54:54,738 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 08:54:54,740 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 08:54:54,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 08:54:54,753 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 08:54:54,762 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 08:54:54,764 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 08:54:54,767 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 08:54:54,768 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 08:54:54,772 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 08:54:54,782 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 08:54:54,782 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 08:54:54,783 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 08:54:54,785 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 08:54:54,786 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 08:54:54,787 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 08:54:54,787 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 08:54:54,788 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 08:54:54,791 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 08:54:54,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 08:54:54,806 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 08:54:54,807 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 08:54:54,807 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 08:54:54,808 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 08:54:54,808 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 08:54:54,809 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 08:54:54,810 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 08:54:54,818 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 [2020-10-28 08:54:54,877 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 08:54:54,877 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 08:54:54,882 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 08:54:54,883 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 08:54:54,883 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 08:54:54,884 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 08:54:54,884 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 08:54:54,884 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 08:54:54,884 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 08:54:54,885 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 08:54:54,886 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 08:54:54,886 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 08:54:54,887 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 08:54:54,887 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 08:54:54,887 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 08:54:54,887 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 08:54:54,888 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 08:54:54,888 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 08:54:54,888 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 08:54:54,889 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 08:54:54,889 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 08:54:54,889 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 08:54:54,889 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 08:54:54,890 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 08:54:54,890 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 08:54:54,890 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 08:54:54,891 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 08:54:54,891 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 08:54:54,891 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 08:54:54,891 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 08:54:55,325 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 08:54:55,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 08:54:55,353 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 08:54:55,354 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 08:54:55,355 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 08:54:55,356 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-28 08:54:55,423 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/818b8c43f/0b9e6be0136244deb704a420729ed65a/FLAGe15412bb3 [2020-10-28 08:54:56,067 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 08:54:56,068 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy7_ground-1.i [2020-10-28 08:54:56,077 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/818b8c43f/0b9e6be0136244deb704a420729ed65a/FLAGe15412bb3 [2020-10-28 08:54:56,414 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/818b8c43f/0b9e6be0136244deb704a420729ed65a [2020-10-28 08:54:56,417 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 08:54:56,425 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 08:54:56,427 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 08:54:56,427 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 08:54:56,433 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 08:54:56,434 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,438 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13f78def and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56, skipping insertion in model container [2020-10-28 08:54:56,439 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,447 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 08:54:56,466 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 08:54:56,650 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:54:56,660 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 08:54:56,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 08:54:56,718 INFO L208 MainTranslator]: Completed translation [2020-10-28 08:54:56,720 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56 WrapperNode [2020-10-28 08:54:56,721 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 08:54:56,723 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 08:54:56,723 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 08:54:56,724 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 08:54:56,741 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,743 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,768 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,768 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,801 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,812 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,823 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (1/1) ... [2020-10-28 08:54:56,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 08:54:56,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 08:54:56,833 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 08:54:56,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 08:54:56,834 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (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 [2020-10-28 08:54:56,946 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 08:54:56,947 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 08:54:56,947 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 08:54:56,948 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 08:54:56,948 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 08:54:56,949 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 08:54:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 08:54:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 08:54:56,950 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 08:54:56,951 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 08:54:56,952 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 08:54:56,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 08:54:56,953 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 08:54:56,953 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 08:54:56,954 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 08:54:56,955 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 08:54:56,955 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 08:54:56,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 08:54:56,956 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 08:54:56,956 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 08:54:57,710 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 08:54:57,711 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-28 08:54:57,713 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:57 BoogieIcfgContainer [2020-10-28 08:54:57,713 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 08:54:57,717 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 08:54:57,717 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 08:54:57,721 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 08:54:57,721 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 08:54:56" (1/3) ... [2020-10-28 08:54:57,723 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbb7b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:57, skipping insertion in model container [2020-10-28 08:54:57,723 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 08:54:56" (2/3) ... [2020-10-28 08:54:57,724 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3fbb7b40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 08:54:57, skipping insertion in model container [2020-10-28 08:54:57,724 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 08:54:57" (3/3) ... [2020-10-28 08:54:57,727 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-1.i [2020-10-28 08:54:57,742 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 08:54:57,750 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 08:54:57,766 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 08:54:57,805 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 08:54:57,805 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 08:54:57,806 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 08:54:57,806 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 08:54:57,806 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 08:54:57,806 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 08:54:57,806 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 08:54:57,806 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 08:54:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states. [2020-10-28 08:54:57,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:54:57,840 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:54:57,842 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] [2020-10-28 08:54:57,843 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:54:57,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:54:57,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1013743180, now seen corresponding path program 1 times [2020-10-28 08:54:57,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:54:57,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173922968] [2020-10-28 08:54:57,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:54:58,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:54:58,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:54:58,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:00,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:00,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:55:00,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:55:00,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2584 [2020-10-28 08:55:00,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:00,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:00,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:00,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 08:55:00,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:00,621 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 08:55:00,737 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:00,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:00,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:00,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:00,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:00,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:00,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 08:55:00,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:00,754 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:00,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:00,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:00,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:55:00,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173922968] [2020-10-28 08:55:00,769 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:00,769 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 08:55:00,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508334664] [2020-10-28 08:55:00,775 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 08:55:00,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:00,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 08:55:00,792 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 08:55:00,794 INFO L87 Difference]: Start difference. First operand 50 states. Second operand 3 states. [2020-10-28 08:55:00,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:00,974 INFO L93 Difference]: Finished difference Result 89 states and 127 transitions. [2020-10-28 08:55:00,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 08:55:00,977 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-28 08:55:00,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:00,988 INFO L225 Difference]: With dead ends: 89 [2020-10-28 08:55:00,989 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 08:55:00,993 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 [2020-10-28 08:55:01,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 08:55:01,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 08:55:01,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 08:55:01,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 50 transitions. [2020-10-28 08:55:01,043 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 50 transitions. Word has length 29 [2020-10-28 08:55:01,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:01,044 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 50 transitions. [2020-10-28 08:55:01,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 08:55:01,044 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 50 transitions. [2020-10-28 08:55:01,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 08:55:01,046 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:01,049 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] [2020-10-28 08:55:01,050 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 08:55:01,050 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:01,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:01,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1638849338, now seen corresponding path program 1 times [2020-10-28 08:55:01,052 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:01,052 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270800071] [2020-10-28 08:55:01,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:01,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:01,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:06,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 08:55:06,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:55:06,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 08:55:06,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:06,073 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:06,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:55:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-28 08:55:06,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:55:06,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 08:55:06,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:06,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:06,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:06,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:06,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:06,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 08:55:06,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:06,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:06,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:06,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:06,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:06,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:06,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 08:55:06,163 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270800071] [2020-10-28 08:55:06,164 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:06,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:55:06,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740006073] [2020-10-28 08:55:06,168 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:55:06,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:06,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:55:06,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:06,174 INFO L87 Difference]: Start difference. First operand 42 states and 50 transitions. Second operand 4 states. [2020-10-28 08:55:06,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:06,520 INFO L93 Difference]: Finished difference Result 87 states and 108 transitions. [2020-10-28 08:55:06,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:55:06,521 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-28 08:55:06,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:06,523 INFO L225 Difference]: With dead ends: 87 [2020-10-28 08:55:06,523 INFO L226 Difference]: Without dead ends: 56 [2020-10-28 08:55:06,527 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 [2020-10-28 08:55:06,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2020-10-28 08:55:06,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 49. [2020-10-28 08:55:06,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 08:55:06,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 57 transitions. [2020-10-28 08:55:06,550 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 57 transitions. Word has length 29 [2020-10-28 08:55:06,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:06,551 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 57 transitions. [2020-10-28 08:55:06,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:55:06,551 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 57 transitions. [2020-10-28 08:55:06,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 08:55:06,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:06,555 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:06,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 08:55:06,556 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:06,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:06,558 INFO L82 PathProgramCache]: Analyzing trace with hash 188130124, now seen corresponding path program 1 times [2020-10-28 08:55:06,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:06,559 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119018367] [2020-10-28 08:55:06,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:06,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:06,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:06,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:10,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:11,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:11,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 08:55:11,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 08:55:11,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:55:11,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:11,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:55:11,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:11,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:11,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:11,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:11,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:11,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:11,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:11,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 08:55:11,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:11,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:11,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:11,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:11,682 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:11,683 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 08:55:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 08:55:11,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119018367] [2020-10-28 08:55:11,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:11,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:11,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251380872] [2020-10-28 08:55:11,695 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:11,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:11,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:11,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:11,696 INFO L87 Difference]: Start difference. First operand 49 states and 57 transitions. Second operand 5 states. [2020-10-28 08:55:12,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:12,132 INFO L93 Difference]: Finished difference Result 107 states and 128 transitions. [2020-10-28 08:55:12,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:12,132 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 43 [2020-10-28 08:55:12,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:12,133 INFO L225 Difference]: With dead ends: 107 [2020-10-28 08:55:12,134 INFO L226 Difference]: Without dead ends: 70 [2020-10-28 08:55:12,135 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 [2020-10-28 08:55:12,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-28 08:55:12,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-10-28 08:55:12,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 08:55:12,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 71 transitions. [2020-10-28 08:55:12,146 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 71 transitions. Word has length 43 [2020-10-28 08:55:12,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:12,147 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 71 transitions. [2020-10-28 08:55:12,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:12,147 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 71 transitions. [2020-10-28 08:55:12,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 08:55:12,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:12,149 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 08:55:12,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 08:55:12,149 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:12,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:12,150 INFO L82 PathProgramCache]: Analyzing trace with hash 139617246, now seen corresponding path program 2 times [2020-10-28 08:55:12,151 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:12,151 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359558497] [2020-10-28 08:55:12,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:12,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:12,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:12,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:12,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:12,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:12,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:12,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:13,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:17,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-28 08:55:17,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:17,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-28 08:55:17,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:17,192 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:17,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 08:55:17,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:17,193 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 08:55:17,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:17,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:17,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:17,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:17,281 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:17,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:17,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:55:17,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:17,281 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:17,282 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:17,282 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:17,291 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 08:55:17,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359558497] [2020-10-28 08:55:17,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 08:55:17,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 08:55:17,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631587402] [2020-10-28 08:55:17,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 08:55:17,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:17,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 08:55:17,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 08:55:17,295 INFO L87 Difference]: Start difference. First operand 63 states and 71 transitions. Second operand 4 states. [2020-10-28 08:55:17,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:17,513 INFO L93 Difference]: Finished difference Result 120 states and 136 transitions. [2020-10-28 08:55:17,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 08:55:17,514 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 57 [2020-10-28 08:55:17,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:17,515 INFO L225 Difference]: With dead ends: 120 [2020-10-28 08:55:17,515 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 08:55:17,518 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 [2020-10-28 08:55:17,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 08:55:17,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-28 08:55:17,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 08:55:17,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2020-10-28 08:55:17,543 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 57 [2020-10-28 08:55:17,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:17,546 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2020-10-28 08:55:17,547 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 08:55:17,547 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2020-10-28 08:55:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 08:55:17,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:17,550 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 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] [2020-10-28 08:55:17,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 08:55:17,555 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:17,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:17,556 INFO L82 PathProgramCache]: Analyzing trace with hash 822081852, now seen corresponding path program 1 times [2020-10-28 08:55:17,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:17,557 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747514624] [2020-10-28 08:55:17,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:17,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:17,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:19,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:22,592 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:22,593 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-28 08:55:22,593 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 08:55:22,593 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:55:22,593 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:22,593 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:55:22,594 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:22,594 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:22,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:22,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:22,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:22,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:22,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:22,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:22,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:22,679 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:22,680 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:22,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:22,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:22,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:22,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 08:55:22,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747514624] [2020-10-28 08:55:22,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:22,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:22,692 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698333668] [2020-10-28 08:55:22,692 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:22,693 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:22,693 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:22,694 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:22,694 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand 6 states. [2020-10-28 08:55:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:23,009 INFO L93 Difference]: Finished difference Result 134 states and 155 transitions. [2020-10-28 08:55:23,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:23,009 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 59 [2020-10-28 08:55:23,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:23,011 INFO L225 Difference]: With dead ends: 134 [2020-10-28 08:55:23,011 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 08:55:23,013 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 [2020-10-28 08:55:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 08:55:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 78. [2020-10-28 08:55:23,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 08:55:23,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 86 transitions. [2020-10-28 08:55:23,036 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 86 transitions. Word has length 59 [2020-10-28 08:55:23,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:23,036 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 86 transitions. [2020-10-28 08:55:23,037 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:23,037 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 86 transitions. [2020-10-28 08:55:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 08:55:23,041 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:23,043 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 08:55:23,044 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 08:55:23,044 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:23,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:23,045 INFO L82 PathProgramCache]: Analyzing trace with hash -1731521074, now seen corresponding path program 2 times [2020-10-28 08:55:23,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:23,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [481505738] [2020-10-28 08:55:23,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:23,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:23,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:23,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:28,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 08:55:28,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:28,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 08:55:28,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:28,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 08:55:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:28,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 08:55:28,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:28,166 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:28,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,173 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:28,174 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:28,174 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:28,174 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:28,174 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:28,174 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:28,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:28,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:28,175 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:28,175 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:28,185 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-28 08:55:28,185 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [481505738] [2020-10-28 08:55:28,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:28,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 08:55:28,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935111606] [2020-10-28 08:55:28,188 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 08:55:28,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:28,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 08:55:28,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 08:55:28,190 INFO L87 Difference]: Start difference. First operand 78 states and 86 transitions. Second operand 5 states. [2020-10-28 08:55:28,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:28,335 INFO L93 Difference]: Finished difference Result 150 states and 166 transitions. [2020-10-28 08:55:28,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 08:55:28,337 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 73 [2020-10-28 08:55:28,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:28,340 INFO L225 Difference]: With dead ends: 150 [2020-10-28 08:55:28,340 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 08:55:28,342 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 [2020-10-28 08:55:28,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 08:55:28,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-28 08:55:28,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 08:55:28,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2020-10-28 08:55:28,359 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 73 [2020-10-28 08:55:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:28,363 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2020-10-28 08:55:28,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 08:55:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2020-10-28 08:55:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 08:55:28,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:28,366 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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] [2020-10-28 08:55:28,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 08:55:28,366 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:28,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:28,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1141780268, now seen corresponding path program 3 times [2020-10-28 08:55:28,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:28,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1838241947] [2020-10-28 08:55:28,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:28,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:28,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:33,412 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:33,413 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-28 08:55:33,413 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:33,413 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 08:55:33,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:33,413 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:33,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:55:33,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 08:55:33,414 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:55:33,414 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:33,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:33,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:33,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:33,530 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:33,530 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:33,530 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:33,530 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:33,531 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:33,531 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:33,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:33,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:33,531 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:33,532 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:33,542 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2020-10-28 08:55:33,543 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1838241947] [2020-10-28 08:55:33,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:33,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:55:33,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398072486] [2020-10-28 08:55:33,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:55:33,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:33,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:55:33,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:55:33,546 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand 7 states. [2020-10-28 08:55:33,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:33,875 INFO L93 Difference]: Finished difference Result 162 states and 183 transitions. [2020-10-28 08:55:33,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:55:33,875 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 75 [2020-10-28 08:55:33,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:33,876 INFO L225 Difference]: With dead ends: 162 [2020-10-28 08:55:33,876 INFO L226 Difference]: Without dead ends: 101 [2020-10-28 08:55:33,877 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 [2020-10-28 08:55:33,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-28 08:55:33,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 94. [2020-10-28 08:55:33,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 08:55:33,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 102 transitions. [2020-10-28 08:55:33,888 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 102 transitions. Word has length 75 [2020-10-28 08:55:33,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:33,888 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 102 transitions. [2020-10-28 08:55:33,888 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:55:33,888 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 102 transitions. [2020-10-28 08:55:33,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2020-10-28 08:55:33,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:33,890 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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] [2020-10-28 08:55:33,890 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 08:55:33,890 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:33,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:33,891 INFO L82 PathProgramCache]: Analyzing trace with hash 2005968830, now seen corresponding path program 4 times [2020-10-28 08:55:33,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:33,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1601558940] [2020-10-28 08:55:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:33,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:33,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:33,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:34,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:38,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:38,921 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-28 08:55:38,921 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:38,921 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 08:55:38,921 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:38,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:38,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:55:38,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:55:38,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:55:38,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:39,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:39,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:39,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:39,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:39,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:39,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:39,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:39,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:39,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:39,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:39,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:39,051 INFO L134 CoverageAnalysis]: Checked inductivity of 116 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2020-10-28 08:55:39,052 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1601558940] [2020-10-28 08:55:39,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:39,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:55:39,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115951730] [2020-10-28 08:55:39,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:55:39,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:39,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:55:39,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:39,058 INFO L87 Difference]: Start difference. First operand 94 states and 102 transitions. Second operand 8 states. [2020-10-28 08:55:39,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:39,491 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2020-10-28 08:55:39,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:55:39,492 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 89 [2020-10-28 08:55:39,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:39,493 INFO L225 Difference]: With dead ends: 188 [2020-10-28 08:55:39,494 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 08:55:39,496 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:55:39,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 08:55:39,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 108. [2020-10-28 08:55:39,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 08:55:39,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 116 transitions. [2020-10-28 08:55:39,516 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 116 transitions. Word has length 89 [2020-10-28 08:55:39,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:39,517 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 116 transitions. [2020-10-28 08:55:39,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:55:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 116 transitions. [2020-10-28 08:55:39,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 08:55:39,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:39,519 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 08:55:39,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 08:55:39,523 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:39,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:39,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1994901296, now seen corresponding path program 5 times [2020-10-28 08:55:39,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:39,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295164537] [2020-10-28 08:55:39,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:39,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:39,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:42,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:44,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:44,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 08:55:44,575 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:44,575 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 08:55:44,575 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:44,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 08:55:44,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:55:44,576 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 08:55:44,576 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:44,648 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:44,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:44,654 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:44,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:44,655 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:44,655 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:44,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:44,655 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:44,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:44,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:44,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:44,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:44,669 INFO L134 CoverageAnalysis]: Checked inductivity of 179 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 175 trivial. 0 not checked. [2020-10-28 08:55:44,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295164537] [2020-10-28 08:55:44,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:44,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 08:55:44,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716072604] [2020-10-28 08:55:44,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 08:55:44,676 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:44,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 08:55:44,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 08:55:44,678 INFO L87 Difference]: Start difference. First operand 108 states and 116 transitions. Second operand 6 states. [2020-10-28 08:55:44,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:44,814 INFO L93 Difference]: Finished difference Result 208 states and 224 transitions. [2020-10-28 08:55:44,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 08:55:44,814 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2020-10-28 08:55:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:44,816 INFO L225 Difference]: With dead ends: 208 [2020-10-28 08:55:44,816 INFO L226 Difference]: Without dead ends: 111 [2020-10-28 08:55:44,817 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 [2020-10-28 08:55:44,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-28 08:55:44,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2020-10-28 08:55:44,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-28 08:55:44,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 118 transitions. [2020-10-28 08:55:44,832 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 118 transitions. Word has length 103 [2020-10-28 08:55:44,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:44,832 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 118 transitions. [2020-10-28 08:55:44,832 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 08:55:44,832 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 118 transitions. [2020-10-28 08:55:44,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-28 08:55:44,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:44,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 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] [2020-10-28 08:55:44,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 08:55:44,837 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:44,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:44,837 INFO L82 PathProgramCache]: Analyzing trace with hash -970778194, now seen corresponding path program 6 times [2020-10-28 08:55:44,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:44,838 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1505235297] [2020-10-28 08:55:44,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:44,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:44,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:44,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:44,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:45,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:48,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:49,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:49,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-28 08:55:49,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:49,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-28 08:55:49,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:49,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:55:49,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-28 08:55:49,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:55:49,893 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:55:49,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:49,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:49,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:50,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:50,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:50,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:55:50,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:50,002 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:50,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:50,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:50,003 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:50,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:50,015 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 159 trivial. 0 not checked. [2020-10-28 08:55:50,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1505235297] [2020-10-28 08:55:50,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:50,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:55:50,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830322736] [2020-10-28 08:55:50,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:55:50,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:50,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:55:50,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:50,018 INFO L87 Difference]: Start difference. First operand 110 states and 118 transitions. Second operand 9 states. [2020-10-28 08:55:50,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:50,389 INFO L93 Difference]: Finished difference Result 216 states and 237 transitions. [2020-10-28 08:55:50,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:55:50,390 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 105 [2020-10-28 08:55:50,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:50,391 INFO L225 Difference]: With dead ends: 216 [2020-10-28 08:55:50,391 INFO L226 Difference]: Without dead ends: 131 [2020-10-28 08:55:50,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:55:50,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-28 08:55:50,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2020-10-28 08:55:50,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-28 08:55:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 132 transitions. [2020-10-28 08:55:50,399 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 132 transitions. Word has length 105 [2020-10-28 08:55:50,400 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:50,400 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 132 transitions. [2020-10-28 08:55:50,400 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:55:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 132 transitions. [2020-10-28 08:55:50,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-28 08:55:50,401 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:50,401 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 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] [2020-10-28 08:55:50,401 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 08:55:50,402 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:50,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash 728303296, now seen corresponding path program 7 times [2020-10-28 08:55:50,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:50,403 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585992064] [2020-10-28 08:55:50,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:50,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:50,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:50,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:54,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:55,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:55,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-28 08:55:55,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 08:55:55,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-28 08:55:55,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:55,493 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:55:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:55:55,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:55:55,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:55,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:55:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:55,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:55,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:55:55,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:55:55,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:55:55,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:55:55,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:55:55,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:55:55,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:55:55,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:55:55,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:55:55,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:55:55,622 INFO L134 CoverageAnalysis]: Checked inductivity of 261 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 08:55:55,622 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585992064] [2020-10-28 08:55:55,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:55:55,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:55:55,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623767042] [2020-10-28 08:55:55,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:55:55,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:55:55,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:55:55,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:55:55,625 INFO L87 Difference]: Start difference. First operand 124 states and 132 transitions. Second operand 10 states. [2020-10-28 08:55:56,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:55:56,077 INFO L93 Difference]: Finished difference Result 242 states and 263 transitions. [2020-10-28 08:55:56,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:55:56,078 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 119 [2020-10-28 08:55:56,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:55:56,079 INFO L225 Difference]: With dead ends: 242 [2020-10-28 08:55:56,079 INFO L226 Difference]: Without dead ends: 145 [2020-10-28 08:55:56,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:55:56,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-28 08:55:56,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2020-10-28 08:55:56,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 08:55:56,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 146 transitions. [2020-10-28 08:55:56,097 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 146 transitions. Word has length 119 [2020-10-28 08:55:56,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:55:56,098 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 146 transitions. [2020-10-28 08:55:56,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:55:56,098 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 146 transitions. [2020-10-28 08:55:56,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 08:55:56,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:55:56,100 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-10-28 08:55:56,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 08:55:56,100 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:55:56,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:55:56,101 INFO L82 PathProgramCache]: Analyzing trace with hash -1318179758, now seen corresponding path program 8 times [2020-10-28 08:55:56,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:55:56,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [14823146] [2020-10-28 08:55:56,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:55:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:55:56,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:55:56,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,131 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:01,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 08:56:01,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:01,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 08:56:01,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:01,132 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:01,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 08:56:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:01,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 08:56:01,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:01,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:01,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:01,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:01,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:01,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:01,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:01,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:01,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:01,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:01,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:01,231 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 343 trivial. 0 not checked. [2020-10-28 08:56:01,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [14823146] [2020-10-28 08:56:01,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:01,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 08:56:01,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599974099] [2020-10-28 08:56:01,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 08:56:01,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:01,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 08:56:01,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 08:56:01,234 INFO L87 Difference]: Start difference. First operand 138 states and 146 transitions. Second operand 7 states. [2020-10-28 08:56:01,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:01,390 INFO L93 Difference]: Finished difference Result 266 states and 282 transitions. [2020-10-28 08:56:01,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 08:56:01,391 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 133 [2020-10-28 08:56:01,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:01,393 INFO L225 Difference]: With dead ends: 266 [2020-10-28 08:56:01,393 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 08:56:01,394 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 [2020-10-28 08:56:01,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 08:56:01,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2020-10-28 08:56:01,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-28 08:56:01,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 148 transitions. [2020-10-28 08:56:01,401 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 148 transitions. Word has length 133 [2020-10-28 08:56:01,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:01,402 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 148 transitions. [2020-10-28 08:56:01,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 08:56:01,402 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 148 transitions. [2020-10-28 08:56:01,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-28 08:56:01,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:01,404 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 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] [2020-10-28 08:56:01,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 08:56:01,404 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:01,405 INFO L82 PathProgramCache]: Analyzing trace with hash -770788176, now seen corresponding path program 9 times [2020-10-28 08:56:01,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:01,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478016830] [2020-10-28 08:56:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:01,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:01,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:01,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:06,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:06,467 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-28 08:56:06,467 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:06,467 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-28 08:56:06,467 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:06,468 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:56:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 08:56:06,468 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:56:06,468 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:06,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:06,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:06,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:06,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:06,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:06,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:06,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:06,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:06,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:06,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:06,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:06,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:06,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:06,612 INFO L134 CoverageAnalysis]: Checked inductivity of 359 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 310 trivial. 0 not checked. [2020-10-28 08:56:06,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478016830] [2020-10-28 08:56:06,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:06,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:56:06,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098487380] [2020-10-28 08:56:06,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:56:06,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:06,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:56:06,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:06,615 INFO L87 Difference]: Start difference. First operand 140 states and 148 transitions. Second operand 11 states. [2020-10-28 08:56:07,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:07,117 INFO L93 Difference]: Finished difference Result 270 states and 291 transitions. [2020-10-28 08:56:07,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:56:07,124 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 135 [2020-10-28 08:56:07,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:07,125 INFO L225 Difference]: With dead ends: 270 [2020-10-28 08:56:07,125 INFO L226 Difference]: Without dead ends: 161 [2020-10-28 08:56:07,126 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 [2020-10-28 08:56:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-28 08:56:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 154. [2020-10-28 08:56:07,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-28 08:56:07,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 162 transitions. [2020-10-28 08:56:07,133 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 162 transitions. Word has length 135 [2020-10-28 08:56:07,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:07,134 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 162 transitions. [2020-10-28 08:56:07,134 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:56:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 162 transitions. [2020-10-28 08:56:07,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2020-10-28 08:56:07,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:07,136 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2020-10-28 08:56:07,136 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 08:56:07,136 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:07,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:07,137 INFO L82 PathProgramCache]: Analyzing trace with hash -577161662, now seen corresponding path program 10 times [2020-10-28 08:56:07,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:07,137 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1120870596] [2020-10-28 08:56:07,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:07,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:07,191 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:07,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:07,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:07,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:07,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:12,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 159 [2020-10-28 08:56:12,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:12,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5049 [2020-10-28 08:56:12,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:12,219 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:12,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 08:56:12,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:12,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 08:56:12,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:12,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:12,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:12,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:12,299 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:12,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:12,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:12,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:12,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:12,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:12,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 464 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 448 trivial. 0 not checked. [2020-10-28 08:56:12,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1120870596] [2020-10-28 08:56:12,314 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:12,314 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 08:56:12,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343797014] [2020-10-28 08:56:12,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 08:56:12,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:12,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 08:56:12,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:12,316 INFO L87 Difference]: Start difference. First operand 154 states and 162 transitions. Second operand 8 states. [2020-10-28 08:56:12,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:12,490 INFO L93 Difference]: Finished difference Result 296 states and 312 transitions. [2020-10-28 08:56:12,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 08:56:12,491 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 149 [2020-10-28 08:56:12,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:12,492 INFO L225 Difference]: With dead ends: 296 [2020-10-28 08:56:12,492 INFO L226 Difference]: Without dead ends: 157 [2020-10-28 08:56:12,493 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 08:56:12,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-28 08:56:12,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 156. [2020-10-28 08:56:12,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 08:56:12,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 164 transitions. [2020-10-28 08:56:12,501 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 164 transitions. Word has length 149 [2020-10-28 08:56:12,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:12,501 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 164 transitions. [2020-10-28 08:56:12,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 08:56:12,502 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 164 transitions. [2020-10-28 08:56:12,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 08:56:12,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:12,503 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 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] [2020-10-28 08:56:12,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 08:56:12,504 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:12,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:12,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1702280544, now seen corresponding path program 11 times [2020-10-28 08:56:12,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:12,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [90877856] [2020-10-28 08:56:12,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:12,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,600 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:12,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:17,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:17,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 08:56:17,569 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:17,569 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-28 08:56:17,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:17,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:56:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 08:56:17,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:56:17,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:17,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:17,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:17,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:17,709 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:17,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:17,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:17,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:17,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:17,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:17,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:17,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:17,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:17,727 INFO L134 CoverageAnalysis]: Checked inductivity of 473 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 409 trivial. 0 not checked. [2020-10-28 08:56:17,728 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [90877856] [2020-10-28 08:56:17,728 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:17,728 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:56:17,729 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137569662] [2020-10-28 08:56:17,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:56:17,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:17,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:56:17,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:56:17,731 INFO L87 Difference]: Start difference. First operand 156 states and 164 transitions. Second operand 12 states. [2020-10-28 08:56:18,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:18,281 INFO L93 Difference]: Finished difference Result 298 states and 319 transitions. [2020-10-28 08:56:18,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:56:18,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 151 [2020-10-28 08:56:18,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:18,283 INFO L225 Difference]: With dead ends: 298 [2020-10-28 08:56:18,284 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 08:56:18,284 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 [2020-10-28 08:56:18,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 08:56:18,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 170. [2020-10-28 08:56:18,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 170 states. [2020-10-28 08:56:18,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 178 transitions. [2020-10-28 08:56:18,293 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 178 transitions. Word has length 151 [2020-10-28 08:56:18,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:18,294 INFO L481 AbstractCegarLoop]: Abstraction has 170 states and 178 transitions. [2020-10-28 08:56:18,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:56:18,294 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 178 transitions. [2020-10-28 08:56:18,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 166 [2020-10-28 08:56:18,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:18,296 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 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] [2020-10-28 08:56:18,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 08:56:18,297 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:18,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:18,297 INFO L82 PathProgramCache]: Analyzing trace with hash 882974770, now seen corresponding path program 12 times [2020-10-28 08:56:18,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:18,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267962514] [2020-10-28 08:56:18,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:18,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:18,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:23,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:23,339 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-28 08:56:23,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:23,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 08:56:23,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:23,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:23,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:56:23,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-28 08:56:23,340 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:56:23,340 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:23,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:23,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:23,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:23,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:23,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:23,495 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:23,495 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:23,495 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:23,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:23,511 INFO L134 CoverageAnalysis]: Checked inductivity of 592 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 511 trivial. 0 not checked. [2020-10-28 08:56:23,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267962514] [2020-10-28 08:56:23,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:23,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:56:23,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509347002] [2020-10-28 08:56:23,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:56:23,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:23,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:56:23,513 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:56:23,513 INFO L87 Difference]: Start difference. First operand 170 states and 178 transitions. Second operand 13 states. [2020-10-28 08:56:24,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:24,060 INFO L93 Difference]: Finished difference Result 324 states and 345 transitions. [2020-10-28 08:56:24,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:56:24,061 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 165 [2020-10-28 08:56:24,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:24,062 INFO L225 Difference]: With dead ends: 324 [2020-10-28 08:56:24,062 INFO L226 Difference]: Without dead ends: 191 [2020-10-28 08:56:24,063 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 [2020-10-28 08:56:24,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-28 08:56:24,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 184. [2020-10-28 08:56:24,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-28 08:56:24,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2020-10-28 08:56:24,073 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 165 [2020-10-28 08:56:24,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:24,074 INFO L481 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2020-10-28 08:56:24,074 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:56:24,074 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2020-10-28 08:56:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-28 08:56:24,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:24,077 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2020-10-28 08:56:24,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 08:56:24,077 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:24,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:24,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1137093052, now seen corresponding path program 13 times [2020-10-28 08:56:24,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:24,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [716983117] [2020-10-28 08:56:24,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:24,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:24,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:24,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,203 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:29,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-28 08:56:29,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:29,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5085 [2020-10-28 08:56:29,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:29,204 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:29,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 08:56:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:29,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 08:56:29,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:29,279 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:29,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:29,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:29,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:29,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:29,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:29,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:29,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:29,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:29,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:29,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:29,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:29,302 INFO L134 CoverageAnalysis]: Checked inductivity of 725 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 700 trivial. 0 not checked. [2020-10-28 08:56:29,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [716983117] [2020-10-28 08:56:29,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:29,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 08:56:29,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002741941] [2020-10-28 08:56:29,303 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 08:56:29,304 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:29,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 08:56:29,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:29,305 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand 9 states. [2020-10-28 08:56:29,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:29,475 INFO L93 Difference]: Finished difference Result 354 states and 370 transitions. [2020-10-28 08:56:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 08:56:29,477 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 179 [2020-10-28 08:56:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:29,478 INFO L225 Difference]: With dead ends: 354 [2020-10-28 08:56:29,478 INFO L226 Difference]: Without dead ends: 187 [2020-10-28 08:56:29,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 08:56:29,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-28 08:56:29,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-10-28 08:56:29,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 08:56:29,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 194 transitions. [2020-10-28 08:56:29,499 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 194 transitions. Word has length 179 [2020-10-28 08:56:29,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:29,500 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 194 transitions. [2020-10-28 08:56:29,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 08:56:29,501 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 194 transitions. [2020-10-28 08:56:29,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 08:56:29,503 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:29,504 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 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] [2020-10-28 08:56:29,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 08:56:29,504 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:29,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:29,505 INFO L82 PathProgramCache]: Analyzing trace with hash -872027614, now seen corresponding path program 14 times [2020-10-28 08:56:29,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:29,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447328491] [2020-10-28 08:56:29,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:29,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:29,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:29,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:34,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:34,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 08:56:34,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:34,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-28 08:56:34,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:34,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:56:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-28 08:56:34,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:56:34,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:34,803 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:34,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:34,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:34,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:34,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:34,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:34,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:34,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:34,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:34,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:34,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:34,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:34,833 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 636 trivial. 0 not checked. [2020-10-28 08:56:34,834 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447328491] [2020-10-28 08:56:34,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:34,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:56:34,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021575329] [2020-10-28 08:56:34,835 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:56:34,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:34,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:56:34,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:56:34,836 INFO L87 Difference]: Start difference. First operand 186 states and 194 transitions. Second operand 14 states. [2020-10-28 08:56:35,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:35,385 INFO L93 Difference]: Finished difference Result 352 states and 373 transitions. [2020-10-28 08:56:35,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:56:35,385 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 181 [2020-10-28 08:56:35,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:35,387 INFO L225 Difference]: With dead ends: 352 [2020-10-28 08:56:35,387 INFO L226 Difference]: Without dead ends: 207 [2020-10-28 08:56:35,388 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 [2020-10-28 08:56:35,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-28 08:56:35,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 200. [2020-10-28 08:56:35,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-28 08:56:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2020-10-28 08:56:35,401 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 181 [2020-10-28 08:56:35,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:35,402 INFO L481 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2020-10-28 08:56:35,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:56:35,402 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2020-10-28 08:56:35,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-28 08:56:35,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:35,406 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2020-10-28 08:56:35,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 08:56:35,406 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:35,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:35,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1202879540, now seen corresponding path program 15 times [2020-10-28 08:56:35,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:35,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [169448142] [2020-10-28 08:56:35,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:35,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:35,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:35,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:40,458 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:40,458 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-28 08:56:40,459 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:40,459 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 08:56:40,459 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:40,459 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:40,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 08:56:40,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:40,460 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 08:56:40,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:40,568 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:40,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:40,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:40,574 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:40,574 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:40,574 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:40,574 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:56:40,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:40,575 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:40,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:40,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:40,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:40,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:40,612 INFO L134 CoverageAnalysis]: Checked inductivity of 883 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 847 trivial. 0 not checked. [2020-10-28 08:56:40,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [169448142] [2020-10-28 08:56:40,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:40,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 08:56:40,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335663010] [2020-10-28 08:56:40,613 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 08:56:40,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:40,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 08:56:40,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:40,615 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand 10 states. [2020-10-28 08:56:40,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:40,801 INFO L93 Difference]: Finished difference Result 384 states and 400 transitions. [2020-10-28 08:56:40,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 08:56:40,802 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 195 [2020-10-28 08:56:40,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:40,803 INFO L225 Difference]: With dead ends: 384 [2020-10-28 08:56:40,803 INFO L226 Difference]: Without dead ends: 203 [2020-10-28 08:56:40,805 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 08:56:40,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-28 08:56:40,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2020-10-28 08:56:40,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-28 08:56:40,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 210 transitions. [2020-10-28 08:56:40,824 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 210 transitions. Word has length 195 [2020-10-28 08:56:40,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:40,824 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 210 transitions. [2020-10-28 08:56:40,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 08:56:40,824 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 210 transitions. [2020-10-28 08:56:40,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-28 08:56:40,827 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:40,828 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 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] [2020-10-28 08:56:40,828 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 08:56:40,828 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:40,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:40,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1119382510, now seen corresponding path program 16 times [2020-10-28 08:56:40,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:40,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455636012] [2020-10-28 08:56:40,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:40,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:40,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:40,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:41,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:45,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:45,889 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-28 08:56:45,889 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:45,889 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 08:56:45,889 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:45,889 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:45,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:56:45,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-28 08:56:45,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:56:45,890 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:46,097 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:46,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:46,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:46,101 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:46,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:46,102 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:46,102 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:46,102 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:46,102 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:46,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:46,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:46,102 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:46,103 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 896 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2020-10-28 08:56:46,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455636012] [2020-10-28 08:56:46,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:46,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:56:46,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007026617] [2020-10-28 08:56:46,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:56:46,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:46,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:56:46,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:56:46,136 INFO L87 Difference]: Start difference. First operand 202 states and 210 transitions. Second operand 15 states. [2020-10-28 08:56:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:46,772 INFO L93 Difference]: Finished difference Result 380 states and 401 transitions. [2020-10-28 08:56:46,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:56:46,772 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 197 [2020-10-28 08:56:46,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:46,774 INFO L225 Difference]: With dead ends: 380 [2020-10-28 08:56:46,774 INFO L226 Difference]: Without dead ends: 223 [2020-10-28 08:56:46,775 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 [2020-10-28 08:56:46,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-28 08:56:46,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 216. [2020-10-28 08:56:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-28 08:56:46,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2020-10-28 08:56:46,787 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 197 [2020-10-28 08:56:46,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:46,787 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2020-10-28 08:56:46,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:56:46,788 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2020-10-28 08:56:46,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-28 08:56:46,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:46,790 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 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] [2020-10-28 08:56:46,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 08:56:46,790 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:46,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:46,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1141932580, now seen corresponding path program 17 times [2020-10-28 08:56:46,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:46,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [438601856] [2020-10-28 08:56:46,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:46,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:46,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:46,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:47,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:51,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:51,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-28 08:56:51,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:51,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-28 08:56:51,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:51,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:51,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:56:51,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-28 08:56:51,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:56:51,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:52,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:52,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:52,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:52,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:52,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:52,138 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 913 trivial. 0 not checked. [2020-10-28 08:56:52,138 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [438601856] [2020-10-28 08:56:52,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:52,138 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:56:52,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568514813] [2020-10-28 08:56:52,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:56:52,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:52,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:56:52,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:52,140 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand 16 states. [2020-10-28 08:56:52,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:52,835 INFO L93 Difference]: Finished difference Result 406 states and 427 transitions. [2020-10-28 08:56:52,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:56:52,836 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 211 [2020-10-28 08:56:52,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:52,838 INFO L225 Difference]: With dead ends: 406 [2020-10-28 08:56:52,838 INFO L226 Difference]: Without dead ends: 237 [2020-10-28 08:56:52,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:56:52,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-28 08:56:52,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 230. [2020-10-28 08:56:52,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 230 states. [2020-10-28 08:56:52,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 238 transitions. [2020-10-28 08:56:52,850 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 238 transitions. Word has length 211 [2020-10-28 08:56:52,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:52,850 INFO L481 AbstractCegarLoop]: Abstraction has 230 states and 238 transitions. [2020-10-28 08:56:52,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:56:52,850 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 238 transitions. [2020-10-28 08:56:52,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2020-10-28 08:56:52,852 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:52,852 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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] [2020-10-28 08:56:52,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 08:56:52,852 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:52,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:52,853 INFO L82 PathProgramCache]: Analyzing trace with hash 1948444854, now seen corresponding path program 18 times [2020-10-28 08:56:52,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:52,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143274563] [2020-10-28 08:56:52,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:52,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:52,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:52,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:53,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:57,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 08:56:57,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:58,080 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:56:58,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:58,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:56:58,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:56:58,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:56:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:56:58,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:56:58,086 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:56:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:56:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:56:58,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:56:58,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:56:58,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1232 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1183 trivial. 0 not checked. [2020-10-28 08:56:58,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143274563] [2020-10-28 08:56:58,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:56:58,111 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 08:56:58,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301673713] [2020-10-28 08:56:58,111 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 08:56:58,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:56:58,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 08:56:58,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:58,112 INFO L87 Difference]: Start difference. First operand 230 states and 238 transitions. Second operand 11 states. [2020-10-28 08:56:58,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:56:58,274 INFO L93 Difference]: Finished difference Result 442 states and 458 transitions. [2020-10-28 08:56:58,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 08:56:58,278 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 225 [2020-10-28 08:56:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:56:58,280 INFO L225 Difference]: With dead ends: 442 [2020-10-28 08:56:58,280 INFO L226 Difference]: Without dead ends: 233 [2020-10-28 08:56:58,281 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 08:56:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-28 08:56:58,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2020-10-28 08:56:58,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-28 08:56:58,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2020-10-28 08:56:58,294 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 225 [2020-10-28 08:56:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:56:58,294 INFO L481 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2020-10-28 08:56:58,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 08:56:58,295 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2020-10-28 08:56:58,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-28 08:56:58,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:56:58,296 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 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] [2020-10-28 08:56:58,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 08:56:58,297 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:56:58,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:56:58,297 INFO L82 PathProgramCache]: Analyzing trace with hash -1026332652, now seen corresponding path program 19 times [2020-10-28 08:56:58,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:56:58,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1919374187] [2020-10-28 08:56:58,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:56:58,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:56:58,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:56:58,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:03,544 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:03,544 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-28 08:57:03,544 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:03,544 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5194 [2020-10-28 08:57:03,544 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:03,544 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 08:57:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-28 08:57:03,545 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 08:57:03,545 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:03,772 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:03,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:03,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:03,777 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:03,777 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:03,777 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:03,777 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:03,777 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:03,777 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:03,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:03,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:03,778 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:03,778 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:03,803 INFO L134 CoverageAnalysis]: Checked inductivity of 1247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1078 trivial. 0 not checked. [2020-10-28 08:57:03,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1919374187] [2020-10-28 08:57:03,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:03,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 08:57:03,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334289766] [2020-10-28 08:57:03,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 08:57:03,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:03,805 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 08:57:03,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 08:57:03,805 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand 17 states. [2020-10-28 08:57:04,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:04,486 INFO L93 Difference]: Finished difference Result 434 states and 455 transitions. [2020-10-28 08:57:04,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 08:57:04,487 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 227 [2020-10-28 08:57:04,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:04,492 INFO L225 Difference]: With dead ends: 434 [2020-10-28 08:57:04,492 INFO L226 Difference]: Without dead ends: 253 [2020-10-28 08:57:04,493 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 [2020-10-28 08:57:04,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-28 08:57:04,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 246. [2020-10-28 08:57:04,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-28 08:57:04,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 254 transitions. [2020-10-28 08:57:04,506 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 254 transitions. Word has length 227 [2020-10-28 08:57:04,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:04,506 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 254 transitions. [2020-10-28 08:57:04,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 08:57:04,506 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 254 transitions. [2020-10-28 08:57:04,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-28 08:57:04,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:04,508 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 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] [2020-10-28 08:57:04,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 08:57:04,508 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:04,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:04,509 INFO L82 PathProgramCache]: Analyzing trace with hash 122235558, now seen corresponding path program 20 times [2020-10-28 08:57:04,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:04,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898736371] [2020-10-28 08:57:04,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:04,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:04,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:04,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:04,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:04,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:04,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:09,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:09,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-28 08:57:09,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:09,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5136 [2020-10-28 08:57:09,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:09,692 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 08:57:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 119 [2020-10-28 08:57:09,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 08:57:09,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:09,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:09,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:09,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:09,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:09,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:09,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:09,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 08:57:09,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:09,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:09,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:09,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:09,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:09,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:09,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1436 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1240 trivial. 0 not checked. [2020-10-28 08:57:09,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898736371] [2020-10-28 08:57:09,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:09,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 08:57:09,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468404836] [2020-10-28 08:57:09,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 08:57:09,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:09,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 08:57:09,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 08:57:09,994 INFO L87 Difference]: Start difference. First operand 246 states and 254 transitions. Second operand 18 states. [2020-10-28 08:57:10,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:10,743 INFO L93 Difference]: Finished difference Result 460 states and 481 transitions. [2020-10-28 08:57:10,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 08:57:10,744 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 241 [2020-10-28 08:57:10,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:10,746 INFO L225 Difference]: With dead ends: 460 [2020-10-28 08:57:10,746 INFO L226 Difference]: Without dead ends: 267 [2020-10-28 08:57:10,748 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 [2020-10-28 08:57:10,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2020-10-28 08:57:10,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 260. [2020-10-28 08:57:10,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-28 08:57:10,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 268 transitions. [2020-10-28 08:57:10,758 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 268 transitions. Word has length 241 [2020-10-28 08:57:10,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:10,759 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 268 transitions. [2020-10-28 08:57:10,759 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 08:57:10,759 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 268 transitions. [2020-10-28 08:57:10,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2020-10-28 08:57:10,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:10,760 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2020-10-28 08:57:10,761 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 08:57:10,761 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:10,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:10,761 INFO L82 PathProgramCache]: Analyzing trace with hash 869959096, now seen corresponding path program 21 times [2020-10-28 08:57:10,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:10,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1086927238] [2020-10-28 08:57:10,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:10,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:10,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:10,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:10,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:11,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:15,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:15,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 265 [2020-10-28 08:57:15,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:15,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-28 08:57:15,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:15,865 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 08:57:15,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:15,866 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 08:57:15,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:15,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:15,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:15,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:15,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:16,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:16,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:16,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:16,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:16,000 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:16,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:16,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:16,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:16,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:16,031 INFO L134 CoverageAnalysis]: Checked inductivity of 1639 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1575 trivial. 0 not checked. [2020-10-28 08:57:16,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1086927238] [2020-10-28 08:57:16,032 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:16,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 08:57:16,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501132063] [2020-10-28 08:57:16,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 08:57:16,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:16,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 08:57:16,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 08:57:16,033 INFO L87 Difference]: Start difference. First operand 260 states and 268 transitions. Second operand 12 states. [2020-10-28 08:57:16,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:16,215 INFO L93 Difference]: Finished difference Result 500 states and 516 transitions. [2020-10-28 08:57:16,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 08:57:16,216 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 255 [2020-10-28 08:57:16,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:16,217 INFO L225 Difference]: With dead ends: 500 [2020-10-28 08:57:16,217 INFO L226 Difference]: Without dead ends: 263 [2020-10-28 08:57:16,218 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 [2020-10-28 08:57:16,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-28 08:57:16,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2020-10-28 08:57:16,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-28 08:57:16,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 270 transitions. [2020-10-28 08:57:16,230 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 270 transitions. Word has length 255 [2020-10-28 08:57:16,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:16,230 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 270 transitions. [2020-10-28 08:57:16,230 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 08:57:16,230 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 270 transitions. [2020-10-28 08:57:16,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2020-10-28 08:57:16,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:16,232 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 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] [2020-10-28 08:57:16,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 08:57:16,232 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:16,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:16,233 INFO L82 PathProgramCache]: Analyzing trace with hash -681816938, now seen corresponding path program 22 times [2020-10-28 08:57:16,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:16,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1984880520] [2020-10-28 08:57:16,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:16,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:16,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:16,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:21,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 267 [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5246 [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 08:57:21,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:21,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:21,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:21,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:21,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:21,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:21,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:21,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:21,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:21,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:21,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:21,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1431 trivial. 0 not checked. [2020-10-28 08:57:21,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1984880520] [2020-10-28 08:57:21,857 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:21,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 08:57:21,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076736398] [2020-10-28 08:57:21,858 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 08:57:21,858 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:21,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 08:57:21,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 08:57:21,859 INFO L87 Difference]: Start difference. First operand 262 states and 270 transitions. Second operand 19 states. [2020-10-28 08:57:22,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:22,544 INFO L93 Difference]: Finished difference Result 488 states and 509 transitions. [2020-10-28 08:57:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 08:57:22,545 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 257 [2020-10-28 08:57:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:22,546 INFO L225 Difference]: With dead ends: 488 [2020-10-28 08:57:22,546 INFO L226 Difference]: Without dead ends: 283 [2020-10-28 08:57:22,547 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 [2020-10-28 08:57:22,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-28 08:57:22,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 276. [2020-10-28 08:57:22,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 276 states. [2020-10-28 08:57:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 284 transitions. [2020-10-28 08:57:22,559 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 284 transitions. Word has length 257 [2020-10-28 08:57:22,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:22,562 INFO L481 AbstractCegarLoop]: Abstraction has 276 states and 284 transitions. [2020-10-28 08:57:22,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 08:57:22,562 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 284 transitions. [2020-10-28 08:57:22,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2020-10-28 08:57:22,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:22,564 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2020-10-28 08:57:22,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 08:57:22,564 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:22,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:22,567 INFO L82 PathProgramCache]: Analyzing trace with hash 458752936, now seen corresponding path program 23 times [2020-10-28 08:57:22,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:22,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081045324] [2020-10-28 08:57:22,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:22,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:22,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:22,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:27,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:27,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 281 [2020-10-28 08:57:27,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:27,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5198 [2020-10-28 08:57:27,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:27,828 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 08:57:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 08:57:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:27,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:27,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:27,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:27,981 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:27,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:27,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:27,982 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:27,982 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:27,982 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:27,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:28,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1873 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1792 trivial. 0 not checked. [2020-10-28 08:57:28,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081045324] [2020-10-28 08:57:28,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:28,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 08:57:28,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477522217] [2020-10-28 08:57:28,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 08:57:28,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:28,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 08:57:28,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 08:57:28,016 INFO L87 Difference]: Start difference. First operand 276 states and 284 transitions. Second operand 13 states. [2020-10-28 08:57:28,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:28,200 INFO L93 Difference]: Finished difference Result 530 states and 546 transitions. [2020-10-28 08:57:28,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 08:57:28,201 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 271 [2020-10-28 08:57:28,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:28,203 INFO L225 Difference]: With dead ends: 530 [2020-10-28 08:57:28,203 INFO L226 Difference]: Without dead ends: 279 [2020-10-28 08:57:28,204 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 [2020-10-28 08:57:28,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-28 08:57:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 278. [2020-10-28 08:57:28,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2020-10-28 08:57:28,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 286 transitions. [2020-10-28 08:57:28,216 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 286 transitions. Word has length 271 [2020-10-28 08:57:28,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:28,216 INFO L481 AbstractCegarLoop]: Abstraction has 278 states and 286 transitions. [2020-10-28 08:57:28,217 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 08:57:28,217 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 286 transitions. [2020-10-28 08:57:28,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 274 [2020-10-28 08:57:28,222 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:28,222 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 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] [2020-10-28 08:57:28,222 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 08:57:28,222 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:28,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:28,231 INFO L82 PathProgramCache]: Analyzing trace with hash -237220218, now seen corresponding path program 24 times [2020-10-28 08:57:28,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:28,232 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [616396700] [2020-10-28 08:57:28,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:28,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:28,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,632 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:28,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:33,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 283 [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 08:57:33,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:33,704 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:33,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:33,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:33,712 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:33,712 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:33,712 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:33,713 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 08:57:33,713 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:33,713 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:33,713 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:33,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:33,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:33,714 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:57:33,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1892 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1636 trivial. 0 not checked. [2020-10-28 08:57:33,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [616396700] [2020-10-28 08:57:33,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:33,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 08:57:33,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177605615] [2020-10-28 08:57:33,812 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 08:57:33,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:33,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 08:57:33,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:33,815 INFO L87 Difference]: Start difference. First operand 278 states and 286 transitions. Second operand 20 states. [2020-10-28 08:57:34,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:34,721 INFO L93 Difference]: Finished difference Result 516 states and 537 transitions. [2020-10-28 08:57:34,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 08:57:34,721 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 273 [2020-10-28 08:57:34,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:34,724 INFO L225 Difference]: With dead ends: 516 [2020-10-28 08:57:34,724 INFO L226 Difference]: Without dead ends: 299 [2020-10-28 08:57:34,725 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 08:57:34,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2020-10-28 08:57:34,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 292. [2020-10-28 08:57:34,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 292 states. [2020-10-28 08:57:34,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 300 transitions. [2020-10-28 08:57:34,736 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 300 transitions. Word has length 273 [2020-10-28 08:57:34,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:34,737 INFO L481 AbstractCegarLoop]: Abstraction has 292 states and 300 transitions. [2020-10-28 08:57:34,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 08:57:34,737 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 300 transitions. [2020-10-28 08:57:34,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2020-10-28 08:57:34,739 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:34,739 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 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] [2020-10-28 08:57:34,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 08:57:34,740 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:34,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:34,740 INFO L82 PathProgramCache]: Analyzing trace with hash 206201240, now seen corresponding path program 25 times [2020-10-28 08:57:34,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:34,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678636393] [2020-10-28 08:57:34,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:34,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:34,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:34,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:35,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:39,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:39,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 297 [2020-10-28 08:57:39,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:39,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-28 08:57:39,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:39,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 08:57:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 08:57:39,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 08:57:39,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:40,373 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:40,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:40,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:40,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:40,382 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:40,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:40,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:57:40,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:40,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:40,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:40,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 08:57:40,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2123 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1834 trivial. 0 not checked. [2020-10-28 08:57:40,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678636393] [2020-10-28 08:57:40,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:40,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 08:57:40,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354228134] [2020-10-28 08:57:40,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 08:57:40,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:40,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 08:57:40,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:40,482 INFO L87 Difference]: Start difference. First operand 292 states and 300 transitions. Second operand 21 states. [2020-10-28 08:57:41,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:41,276 INFO L93 Difference]: Finished difference Result 542 states and 563 transitions. [2020-10-28 08:57:41,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 08:57:41,276 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 287 [2020-10-28 08:57:41,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:41,278 INFO L225 Difference]: With dead ends: 542 [2020-10-28 08:57:41,278 INFO L226 Difference]: Without dead ends: 313 [2020-10-28 08:57:41,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 08:57:41,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-28 08:57:41,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 306. [2020-10-28 08:57:41,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 306 states. [2020-10-28 08:57:41,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 314 transitions. [2020-10-28 08:57:41,295 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 314 transitions. Word has length 287 [2020-10-28 08:57:41,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:41,295 INFO L481 AbstractCegarLoop]: Abstraction has 306 states and 314 transitions. [2020-10-28 08:57:41,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 08:57:41,295 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 314 transitions. [2020-10-28 08:57:41,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 302 [2020-10-28 08:57:41,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:41,298 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2020-10-28 08:57:41,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 08:57:41,299 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:41,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:41,299 INFO L82 PathProgramCache]: Analyzing trace with hash 149761322, now seen corresponding path program 26 times [2020-10-28 08:57:41,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:41,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1934096083] [2020-10-28 08:57:41,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:41,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:41,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:46,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:46,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 311 [2020-10-28 08:57:46,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:46,404 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-28 08:57:46,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:46,404 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 08:57:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:46,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 08:57:46,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:46,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:46,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:46,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:46,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:46,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:46,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:46,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:46,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:46,591 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:46,592 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:46,592 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:46,666 INFO L134 CoverageAnalysis]: Checked inductivity of 2368 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 2268 trivial. 0 not checked. [2020-10-28 08:57:46,666 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1934096083] [2020-10-28 08:57:46,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:46,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 08:57:46,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598314743] [2020-10-28 08:57:46,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 08:57:46,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 08:57:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 08:57:46,668 INFO L87 Difference]: Start difference. First operand 306 states and 314 transitions. Second operand 14 states. [2020-10-28 08:57:46,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:46,857 INFO L93 Difference]: Finished difference Result 588 states and 604 transitions. [2020-10-28 08:57:46,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 08:57:46,858 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 301 [2020-10-28 08:57:46,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:46,859 INFO L225 Difference]: With dead ends: 588 [2020-10-28 08:57:46,860 INFO L226 Difference]: Without dead ends: 309 [2020-10-28 08:57:46,861 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 [2020-10-28 08:57:46,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2020-10-28 08:57:46,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 308. [2020-10-28 08:57:46,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 308 states. [2020-10-28 08:57:46,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 316 transitions. [2020-10-28 08:57:46,870 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 316 transitions. Word has length 301 [2020-10-28 08:57:46,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:46,871 INFO L481 AbstractCegarLoop]: Abstraction has 308 states and 316 transitions. [2020-10-28 08:57:46,871 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 08:57:46,871 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 316 transitions. [2020-10-28 08:57:46,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2020-10-28 08:57:46,873 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:46,873 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 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] [2020-10-28 08:57:46,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 08:57:46,873 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:46,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:46,874 INFO L82 PathProgramCache]: Analyzing trace with hash 204578696, now seen corresponding path program 27 times [2020-10-28 08:57:46,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:46,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1605449873] [2020-10-28 08:57:46,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:46,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:46,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:47,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:52,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:52,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 313 [2020-10-28 08:57:52,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:52,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5392 [2020-10-28 08:57:52,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:52,329 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:52,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 08:57:52,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 149 [2020-10-28 08:57:52,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 08:57:52,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:52,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:52,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:52,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:52,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:52,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:52,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:52,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:52,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:52,749 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:52,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:52,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:52,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:52,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:52,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2389 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2065 trivial. 0 not checked. [2020-10-28 08:57:52,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1605449873] [2020-10-28 08:57:52,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:52,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 08:57:52,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560932008] [2020-10-28 08:57:52,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 08:57:52,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:52,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 08:57:52,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 08:57:52,815 INFO L87 Difference]: Start difference. First operand 308 states and 316 transitions. Second operand 22 states. [2020-10-28 08:57:53,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:53,615 INFO L93 Difference]: Finished difference Result 570 states and 591 transitions. [2020-10-28 08:57:53,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 08:57:53,616 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 303 [2020-10-28 08:57:53,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:53,618 INFO L225 Difference]: With dead ends: 570 [2020-10-28 08:57:53,618 INFO L226 Difference]: Without dead ends: 329 [2020-10-28 08:57:53,619 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 [2020-10-28 08:57:53,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 329 states. [2020-10-28 08:57:53,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 329 to 322. [2020-10-28 08:57:53,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 322 states. [2020-10-28 08:57:53,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 322 states to 322 states and 330 transitions. [2020-10-28 08:57:53,629 INFO L78 Accepts]: Start accepts. Automaton has 322 states and 330 transitions. Word has length 303 [2020-10-28 08:57:53,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:53,630 INFO L481 AbstractCegarLoop]: Abstraction has 322 states and 330 transitions. [2020-10-28 08:57:53,630 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 08:57:53,630 INFO L276 IsEmpty]: Start isEmpty. Operand 322 states and 330 transitions. [2020-10-28 08:57:53,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 318 [2020-10-28 08:57:53,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:53,633 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 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] [2020-10-28 08:57:53,633 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 08:57:53,634 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:53,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:53,634 INFO L82 PathProgramCache]: Analyzing trace with hash -435304678, now seen corresponding path program 28 times [2020-10-28 08:57:53,635 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:53,635 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508113637] [2020-10-28 08:57:53,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:53,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:53,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:59,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:59,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 327 [2020-10-28 08:57:59,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:57:59,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5591 [2020-10-28 08:57:59,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:59,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:59,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 08:57:59,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:57:59,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 08:57:59,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:59,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:57:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:59,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:59,503 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:57:59,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:57:59,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:57:59,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:57:59,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:57:59,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:57:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:57:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:57:59,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:57:59,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:57:59,569 INFO L134 CoverageAnalysis]: Checked inductivity of 2648 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2527 trivial. 0 not checked. [2020-10-28 08:57:59,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508113637] [2020-10-28 08:57:59,570 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:57:59,570 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 08:57:59,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74378783] [2020-10-28 08:57:59,571 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 08:57:59,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:57:59,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 08:57:59,572 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 08:57:59,572 INFO L87 Difference]: Start difference. First operand 322 states and 330 transitions. Second operand 15 states. [2020-10-28 08:57:59,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:57:59,771 INFO L93 Difference]: Finished difference Result 618 states and 634 transitions. [2020-10-28 08:57:59,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 08:57:59,771 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 317 [2020-10-28 08:57:59,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:57:59,774 INFO L225 Difference]: With dead ends: 618 [2020-10-28 08:57:59,774 INFO L226 Difference]: Without dead ends: 325 [2020-10-28 08:57:59,775 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 [2020-10-28 08:57:59,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2020-10-28 08:57:59,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 324. [2020-10-28 08:57:59,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 324 states. [2020-10-28 08:57:59,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 332 transitions. [2020-10-28 08:57:59,786 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 332 transitions. Word has length 317 [2020-10-28 08:57:59,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:57:59,786 INFO L481 AbstractCegarLoop]: Abstraction has 324 states and 332 transitions. [2020-10-28 08:57:59,786 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 08:57:59,786 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 332 transitions. [2020-10-28 08:57:59,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2020-10-28 08:57:59,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:57:59,789 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 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] [2020-10-28 08:57:59,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 08:57:59,789 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:57:59,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:57:59,790 INFO L82 PathProgramCache]: Analyzing trace with hash 613268856, now seen corresponding path program 29 times [2020-10-28 08:57:59,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:57:59,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534285742] [2020-10-28 08:57:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:57:59,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:57:59,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:57:59,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:00,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,285 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:05,285 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-28 08:58:05,285 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:05,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5414 [2020-10-28 08:58:05,286 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:05,286 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:05,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 08:58:05,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:58:05,286 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 08:58:05,286 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:05,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:05,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:05,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:05,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:05,702 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:05,702 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:05,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 08:58:05,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:05,703 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:05,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:05,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:05,766 INFO L134 CoverageAnalysis]: Checked inductivity of 2671 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2310 trivial. 0 not checked. [2020-10-28 08:58:05,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534285742] [2020-10-28 08:58:05,766 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:05,766 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 08:58:05,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393825488] [2020-10-28 08:58:05,767 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 08:58:05,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:05,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 08:58:05,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 08:58:05,768 INFO L87 Difference]: Start difference. First operand 324 states and 332 transitions. Second operand 23 states. [2020-10-28 08:58:06,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:06,650 INFO L93 Difference]: Finished difference Result 598 states and 619 transitions. [2020-10-28 08:58:06,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 08:58:06,651 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 319 [2020-10-28 08:58:06,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:06,653 INFO L225 Difference]: With dead ends: 598 [2020-10-28 08:58:06,653 INFO L226 Difference]: Without dead ends: 345 [2020-10-28 08:58:06,657 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 [2020-10-28 08:58:06,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 345 states. [2020-10-28 08:58:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 345 to 338. [2020-10-28 08:58:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-28 08:58:06,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 346 transitions. [2020-10-28 08:58:06,670 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 346 transitions. Word has length 319 [2020-10-28 08:58:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:06,671 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 346 transitions. [2020-10-28 08:58:06,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 08:58:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 346 transitions. [2020-10-28 08:58:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 334 [2020-10-28 08:58:06,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:06,674 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 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] [2020-10-28 08:58:06,675 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 08:58:06,675 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:06,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:06,676 INFO L82 PathProgramCache]: Analyzing trace with hash 682311946, now seen corresponding path program 30 times [2020-10-28 08:58:06,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:06,676 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [568480706] [2020-10-28 08:58:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:06,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:06,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:07,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:07,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:07,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:11,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:11,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-28 08:58:11,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:11,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-28 08:58:11,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:11,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:11,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 08:58:11,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 08:58:11,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-28 08:58:11,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:12,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:12,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:12,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:12,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:12,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:12,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2944 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2544 trivial. 0 not checked. [2020-10-28 08:58:12,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [568480706] [2020-10-28 08:58:12,363 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:12,363 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 08:58:12,363 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631590994] [2020-10-28 08:58:12,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 08:58:12,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:12,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 08:58:12,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:12,365 INFO L87 Difference]: Start difference. First operand 338 states and 346 transitions. Second operand 24 states. [2020-10-28 08:58:13,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:13,411 INFO L93 Difference]: Finished difference Result 624 states and 645 transitions. [2020-10-28 08:58:13,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 08:58:13,412 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 333 [2020-10-28 08:58:13,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:13,414 INFO L225 Difference]: With dead ends: 624 [2020-10-28 08:58:13,414 INFO L226 Difference]: Without dead ends: 359 [2020-10-28 08:58:13,416 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 08:58:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-28 08:58:13,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 352. [2020-10-28 08:58:13,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 352 states. [2020-10-28 08:58:13,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2020-10-28 08:58:13,426 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 333 [2020-10-28 08:58:13,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:13,426 INFO L481 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2020-10-28 08:58:13,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 08:58:13,427 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2020-10-28 08:58:13,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2020-10-28 08:58:13,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:13,429 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 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] [2020-10-28 08:58:13,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 08:58:13,430 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:13,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:13,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1579064604, now seen corresponding path program 31 times [2020-10-28 08:58:13,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:13,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393337475] [2020-10-28 08:58:13,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:13,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:13,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:13,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:13,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:13,828 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:19,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:19,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-28 08:58:19,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:19,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5975 [2020-10-28 08:58:19,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:19,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 08:58:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 08:58:19,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 08:58:19,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:19,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:19,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:19,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:19,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:19,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:19,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:19,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 08:58:19,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:19,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:19,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:19,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:19,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3231 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 3087 trivial. 0 not checked. [2020-10-28 08:58:19,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393337475] [2020-10-28 08:58:19,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:19,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 08:58:19,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379913734] [2020-10-28 08:58:19,871 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 08:58:19,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:19,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 08:58:19,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 08:58:19,872 INFO L87 Difference]: Start difference. First operand 352 states and 360 transitions. Second operand 16 states. [2020-10-28 08:58:20,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:20,082 INFO L93 Difference]: Finished difference Result 676 states and 692 transitions. [2020-10-28 08:58:20,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 08:58:20,083 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 347 [2020-10-28 08:58:20,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:20,085 INFO L225 Difference]: With dead ends: 676 [2020-10-28 08:58:20,085 INFO L226 Difference]: Without dead ends: 355 [2020-10-28 08:58:20,086 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 [2020-10-28 08:58:20,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2020-10-28 08:58:20,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 354. [2020-10-28 08:58:20,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 354 states. [2020-10-28 08:58:20,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 362 transitions. [2020-10-28 08:58:20,095 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 362 transitions. Word has length 347 [2020-10-28 08:58:20,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:20,095 INFO L481 AbstractCegarLoop]: Abstraction has 354 states and 362 transitions. [2020-10-28 08:58:20,095 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 08:58:20,095 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 362 transitions. [2020-10-28 08:58:20,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-28 08:58:20,098 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:20,098 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 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] [2020-10-28 08:58:20,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 08:58:20,098 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:20,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:20,099 INFO L82 PathProgramCache]: Analyzing trace with hash -767190278, now seen corresponding path program 32 times [2020-10-28 08:58:20,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:20,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1652903172] [2020-10-28 08:58:20,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:20,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:20,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:20,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:20,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:20,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:20,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 359 [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5318 [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 171 [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-28 08:58:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:25,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:25,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:25,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:25,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:25,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2815 trivial. 0 not checked. [2020-10-28 08:58:26,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1652903172] [2020-10-28 08:58:26,082 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:26,082 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 08:58:26,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378546271] [2020-10-28 08:58:26,083 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 08:58:26,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:26,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 08:58:26,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 08:58:26,083 INFO L87 Difference]: Start difference. First operand 354 states and 362 transitions. Second operand 25 states. [2020-10-28 08:58:27,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 08:58:27,173 INFO L93 Difference]: Finished difference Result 652 states and 673 transitions. [2020-10-28 08:58:27,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 08:58:27,174 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 349 [2020-10-28 08:58:27,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 08:58:27,176 INFO L225 Difference]: With dead ends: 652 [2020-10-28 08:58:27,177 INFO L226 Difference]: Without dead ends: 375 [2020-10-28 08:58:27,178 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 [2020-10-28 08:58:27,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2020-10-28 08:58:27,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 368. [2020-10-28 08:58:27,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 368 states. [2020-10-28 08:58:27,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 376 transitions. [2020-10-28 08:58:27,189 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 376 transitions. Word has length 349 [2020-10-28 08:58:27,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 08:58:27,189 INFO L481 AbstractCegarLoop]: Abstraction has 368 states and 376 transitions. [2020-10-28 08:58:27,189 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 08:58:27,189 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 376 transitions. [2020-10-28 08:58:27,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-28 08:58:27,192 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 08:58:27,192 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 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] [2020-10-28 08:58:27,192 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 08:58:27,192 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 08:58:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 08:58:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1400810740, now seen corresponding path program 33 times [2020-10-28 08:58:27,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 08:58:27,193 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [600302765] [2020-10-28 08:58:27,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 08:58:27,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:27,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:27,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:27,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:27,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:27,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:32,336 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:32,336 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 373 [2020-10-28 08:58:32,336 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 08:58:32,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5074 [2020-10-28 08:58:32,337 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:32,337 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 08:58:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 177 [2020-10-28 08:58:32,337 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-28 08:58:32,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:32,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 08:58:32,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 08:58:32,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 08:58:32,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 08:58:32,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 08:58:32,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 08:58:32,859 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 08:58:32,859 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 08:58:32,859 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 08:58:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 08:58:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 08:58:32,859 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 08:58:32,859 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 08:58:32,941 INFO L134 CoverageAnalysis]: Checked inductivity of 3557 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 3073 trivial. 0 not checked. [2020-10-28 08:58:32,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [600302765] [2020-10-28 08:58:32,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 08:58:32,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 08:58:32,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180505592] [2020-10-28 08:58:32,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 08:58:32,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 08:58:32,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 08:58:32,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 08:58:32,944 INFO L87 Difference]: Start difference. First operand 368 states and 376 transitions. Second operand 26 states.