/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:29:01,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:29:01,811 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:29:01,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:29:01,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:29:01,849 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:29:01,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:29:01,853 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:29:01,855 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:29:01,856 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:29:01,858 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:29:01,859 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:29:01,860 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:29:01,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:29:01,863 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:29:01,864 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:29:01,866 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:29:01,867 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:29:01,869 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:29:01,872 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:29:01,874 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:29:01,875 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:29:01,877 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:29:01,878 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:29:01,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:29:01,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:29:01,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:29:01,884 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:29:01,884 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:29:01,885 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:29:01,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:29:01,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:29:01,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:29:01,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:29:01,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:29:01,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:29:01,892 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:29:01,892 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:29:01,893 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:29:01,894 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:29:01,895 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:29:01,896 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-26 19:29:01,925 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:29:01,926 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:29:01,927 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:29:01,928 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:29:01,928 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:29:01,928 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:29:01,928 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:29:01,929 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:29:01,929 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:29:01,929 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:29:01,929 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:29:01,930 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:29:01,930 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:29:01,930 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:29:01,930 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:29:01,930 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:29:01,931 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:29:01,931 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:29:01,931 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:29:01,931 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:29:01,931 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:29:01,932 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:01,932 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:29:01,932 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:29:01,932 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:29:01,932 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:29:01,933 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:29:01,933 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:29:01,933 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:29:01,933 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:29:02,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:29:02,349 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:29:02,354 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:29:02,355 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:29:02,356 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:29:02,358 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2020-10-26 19:29:02,446 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26fd0ec41/2cf41511f787464aa265bad83823cfcb/FLAG2cebe06a7 [2020-10-26 19:29:03,159 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:29:03,160 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_minInArray_ground-2.i [2020-10-26 19:29:03,168 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26fd0ec41/2cf41511f787464aa265bad83823cfcb/FLAG2cebe06a7 [2020-10-26 19:29:03,500 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/26fd0ec41/2cf41511f787464aa265bad83823cfcb [2020-10-26 19:29:03,504 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:29:03,512 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:29:03,514 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:03,514 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:29:03,519 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:29:03,520 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,524 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2f66cf56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03, skipping insertion in model container [2020-10-26 19:29:03,524 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,533 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:29:03,549 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:29:03,719 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:03,728 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:29:03,750 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:29:03,767 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:29:03,767 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03 WrapperNode [2020-10-26 19:29:03,768 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:29:03,769 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:29:03,769 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:29:03,769 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:29:03,781 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,782 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,789 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,798 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,803 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,805 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (1/1) ... [2020-10-26 19:29:03,807 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:29:03,809 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:29:03,809 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:29:03,809 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:29:03,810 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:29:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:29:03,898 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:29:03,899 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:29:03,899 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:29:03,900 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:29:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:29:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:29:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:29:03,900 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:29:03,901 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:29:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:29:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:29:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-26 19:29:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:29:03,902 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:29:03,903 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:29:03,903 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:29:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:29:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:29:03,904 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:29:04,488 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:29:04,488 INFO L298 CfgBuilder]: Removed 3 assume(true) statements. [2020-10-26 19:29:04,490 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:04 BoogieIcfgContainer [2020-10-26 19:29:04,491 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:29:04,494 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:29:04,495 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:29:04,499 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:29:04,499 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:29:03" (1/3) ... [2020-10-26 19:29:04,501 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0d8d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:04, skipping insertion in model container [2020-10-26 19:29:04,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:29:03" (2/3) ... [2020-10-26 19:29:04,502 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6b0d8d56 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:29:04, skipping insertion in model container [2020-10-26 19:29:04,502 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:29:04" (3/3) ... [2020-10-26 19:29:04,505 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_minInArray_ground-2.i [2020-10-26 19:29:04,519 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:29:04,525 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:29:04,540 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:29:04,589 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:29:04,590 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:29:04,590 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:29:04,590 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:29:04,590 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:29:04,590 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:29:04,591 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:29:04,591 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:29:04,615 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-26 19:29:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:29:04,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:04,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:04,627 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash -368075238, now seen corresponding path program 1 times [2020-10-26 19:29:04,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:04,657 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [934131329] [2020-10-26 19:29:04,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:04,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:04,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:05,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:29:05,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:05,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-26 19:29:05,141 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:05,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:05,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:29:05,142 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:05,142 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-26 19:29:05,245 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:05,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:05,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,260 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:05,261 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:05,261 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:05,261 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-26 19:29:05,261 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:05,262 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:05,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:05,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:05,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [934131329] [2020-10-26 19:29:05,276 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:05,276 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-26 19:29:05,277 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482334040] [2020-10-26 19:29:05,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-26 19:29:05,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:05,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-26 19:29:05,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:29:05,300 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-26 19:29:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:05,401 INFO L93 Difference]: Finished difference Result 55 states and 71 transitions. [2020-10-26 19:29:05,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-26 19:29:05,403 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-26 19:29:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:05,411 INFO L225 Difference]: With dead ends: 55 [2020-10-26 19:29:05,411 INFO L226 Difference]: Without dead ends: 25 [2020-10-26 19:29:05,415 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-26 19:29:05,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-26 19:29:05,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-26 19:29:05,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-26 19:29:05,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2020-10-26 19:29:05,459 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 17 [2020-10-26 19:29:05,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:05,459 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2020-10-26 19:29:05,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-26 19:29:05,460 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2020-10-26 19:29:05,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-26 19:29:05,461 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:05,461 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:05,461 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:29:05,461 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:05,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:05,462 INFO L82 PathProgramCache]: Analyzing trace with hash 230860937, now seen corresponding path program 1 times [2020-10-26 19:29:05,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:05,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [685850596] [2020-10-26 19:29:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:05,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:05,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:05,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-26 19:29:05,709 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:29:05,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 229 [2020-10-26 19:29:05,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:29:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:05,710 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:29:05,710 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:05,766 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:05,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,794 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:05,795 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:05,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:05,796 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-10-26 19:29:05,796 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:05,796 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:05,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:05,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:05,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:29:05,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [685850596] [2020-10-26 19:29:05,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:29:05,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:29:05,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30368600] [2020-10-26 19:29:05,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:29:05,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:05,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:29:05,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:29:05,829 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand 4 states. [2020-10-26 19:29:05,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:05,925 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2020-10-26 19:29:05,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:29:05,926 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-26 19:29:05,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:05,928 INFO L225 Difference]: With dead ends: 47 [2020-10-26 19:29:05,928 INFO L226 Difference]: Without dead ends: 30 [2020-10-26 19:29:05,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:29:05,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-26 19:29:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2020-10-26 19:29:05,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-26 19:29:05,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-26 19:29:05,938 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-26 19:29:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:05,939 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-26 19:29:05,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:29:05,942 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-26 19:29:05,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-26 19:29:05,943 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:05,944 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] [2020-10-26 19:29:05,944 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:29:05,944 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:05,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:05,945 INFO L82 PathProgramCache]: Analyzing trace with hash -255982583, now seen corresponding path program 1 times [2020-10-26 19:29:05,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:05,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1660941794] [2020-10-26 19:29:05,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:05,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:05,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:06,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:07,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:07,145 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-26 19:29:07,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:07,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1172 [2020-10-26 19:29:07,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:07,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:29:07,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:07,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:29:07,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:07,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:07,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:07,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:07,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:07,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:07,222 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:07,222 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:07,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:07,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:07,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:07,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:07,223 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:07,229 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:29:07,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1660941794] [2020-10-26 19:29:07,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:07,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:29:07,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533376643] [2020-10-26 19:29:07,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:29:07,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:07,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:29:07,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:07,232 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-26 19:29:07,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:07,340 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2020-10-26 19:29:07,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:29:07,341 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-26 19:29:07,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:07,342 INFO L225 Difference]: With dead ends: 53 [2020-10-26 19:29:07,342 INFO L226 Difference]: Without dead ends: 35 [2020-10-26 19:29:07,343 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:29:07,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-26 19:29:07,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-26 19:29:07,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-26 19:29:07,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-26 19:29:07,352 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 22 [2020-10-26 19:29:07,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:07,353 INFO L481 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-26 19:29:07,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:29:07,353 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-26 19:29:07,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-26 19:29:07,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:07,355 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:07,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:29:07,355 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:07,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:07,356 INFO L82 PathProgramCache]: Analyzing trace with hash 768417029, now seen corresponding path program 2 times [2020-10-26 19:29:07,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:07,357 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [570311845] [2020-10-26 19:29:07,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:07,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:07,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:07,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:07,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:09,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-26 19:29:09,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:09,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2116 [2020-10-26 19:29:09,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:09,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:29:09,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:09,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:29:09,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:09,546 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:09,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:09,553 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:09,553 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:09,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:09,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:09,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:09,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:09,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:09,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:09,558 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:29:09,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [570311845] [2020-10-26 19:29:09,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:09,559 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:29:09,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349826864] [2020-10-26 19:29:09,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:29:09,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:09,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:29:09,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:09,561 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 6 states. [2020-10-26 19:29:09,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:09,652 INFO L93 Difference]: Finished difference Result 61 states and 72 transitions. [2020-10-26 19:29:09,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:29:09,652 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-26 19:29:09,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:09,653 INFO L225 Difference]: With dead ends: 61 [2020-10-26 19:29:09,653 INFO L226 Difference]: Without dead ends: 40 [2020-10-26 19:29:09,654 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:29:09,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-26 19:29:09,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 37. [2020-10-26 19:29:09,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-26 19:29:09,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2020-10-26 19:29:09,662 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 27 [2020-10-26 19:29:09,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:09,662 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2020-10-26 19:29:09,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:29:09,662 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2020-10-26 19:29:09,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-26 19:29:09,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:09,664 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:09,664 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:29:09,664 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:09,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:09,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1229530227, now seen corresponding path program 3 times [2020-10-26 19:29:09,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:09,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078927713] [2020-10-26 19:29:09,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:09,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:09,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:09,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:14,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:14,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-26 19:29:14,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:14,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4533 [2020-10-26 19:29:14,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:29:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:14,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:29:14,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:29:14,301 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:14,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:14,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:14,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:14,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:14,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:14,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:14,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:14,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:14,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:14,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-26 19:29:14,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078927713] [2020-10-26 19:29:14,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:14,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:29:14,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5158181] [2020-10-26 19:29:14,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:29:14,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:14,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:29:14,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:14,331 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand 7 states. [2020-10-26 19:29:14,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:14,532 INFO L93 Difference]: Finished difference Result 69 states and 82 transitions. [2020-10-26 19:29:14,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:29:14,533 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-26 19:29:14,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:14,534 INFO L225 Difference]: With dead ends: 69 [2020-10-26 19:29:14,534 INFO L226 Difference]: Without dead ends: 45 [2020-10-26 19:29:14,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:29:14,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-26 19:29:14,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-10-26 19:29:14,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:29:14,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-26 19:29:14,548 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 32 [2020-10-26 19:29:14,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:14,549 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-26 19:29:14,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:29:14,549 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-26 19:29:14,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:29:14,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:14,551 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:14,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:29:14,552 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:14,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:14,554 INFO L82 PathProgramCache]: Analyzing trace with hash 361097601, now seen corresponding path program 4 times [2020-10-26 19:29:14,554 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:14,555 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1529253376] [2020-10-26 19:29:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:14,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:14,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:14,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:14,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:19,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:19,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:29:19,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:19,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:29:19,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:29:19,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:19,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:29:19,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:19,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:19,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:19,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:19,669 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:19,670 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:19,677 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-26 19:29:19,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1529253376] [2020-10-26 19:29:19,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:19,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:29:19,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891210189] [2020-10-26 19:29:19,682 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:29:19,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:19,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:29:19,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:19,685 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 8 states. [2020-10-26 19:29:19,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:19,860 INFO L93 Difference]: Finished difference Result 77 states and 92 transitions. [2020-10-26 19:29:19,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:29:19,864 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-26 19:29:19,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:19,865 INFO L225 Difference]: With dead ends: 77 [2020-10-26 19:29:19,865 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:29:19,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:29:19,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:29:19,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 47. [2020-10-26 19:29:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-26 19:29:19,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 54 transitions. [2020-10-26 19:29:19,881 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 54 transitions. Word has length 37 [2020-10-26 19:29:19,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:19,883 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 54 transitions. [2020-10-26 19:29:19,883 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:29:19,883 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 54 transitions. [2020-10-26 19:29:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-26 19:29:19,884 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:19,885 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:19,885 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:29:19,886 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:19,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:19,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1375173393, now seen corresponding path program 5 times [2020-10-26 19:29:19,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:19,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178325591] [2020-10-26 19:29:19,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:19,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:19,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:19,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:20,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:24,907 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-26 19:29:24,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:24,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:29:24,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:24,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:29:24,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:24,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:29:24,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:24,991 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:24,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:24,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:24,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:24,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:24,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:25,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:25,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:25,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:25,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:25,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:25,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:25,018 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2020-10-26 19:29:25,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178325591] [2020-10-26 19:29:25,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:25,019 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:29:25,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894585858] [2020-10-26 19:29:25,019 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:29:25,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:25,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:29:25,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:25,021 INFO L87 Difference]: Start difference. First operand 47 states and 54 transitions. Second operand 9 states. [2020-10-26 19:29:25,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:25,190 INFO L93 Difference]: Finished difference Result 85 states and 102 transitions. [2020-10-26 19:29:25,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:29:25,190 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-26 19:29:25,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:25,191 INFO L225 Difference]: With dead ends: 85 [2020-10-26 19:29:25,191 INFO L226 Difference]: Without dead ends: 55 [2020-10-26 19:29:25,192 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:29:25,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-26 19:29:25,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-26 19:29:25,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-26 19:29:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 60 transitions. [2020-10-26 19:29:25,200 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 60 transitions. Word has length 42 [2020-10-26 19:29:25,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:25,200 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 60 transitions. [2020-10-26 19:29:25,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:29:25,200 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 60 transitions. [2020-10-26 19:29:25,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:29:25,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:25,202 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:25,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:29:25,202 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:25,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:25,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1845441027, now seen corresponding path program 6 times [2020-10-26 19:29:25,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:25,203 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [235270838] [2020-10-26 19:29:25,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:25,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:25,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:25,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:30,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:29:30,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:30,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:29:30,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:30,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:29:30,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:30,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:29:30,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:30,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:30,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:30,354 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:30,354 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:30,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:29:30,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:30,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:30,355 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:30,355 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:30,360 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2020-10-26 19:29:30,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [235270838] [2020-10-26 19:29:30,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:30,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:29:30,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215153890] [2020-10-26 19:29:30,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:29:30,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:30,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:29:30,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:30,369 INFO L87 Difference]: Start difference. First operand 52 states and 60 transitions. Second operand 10 states. [2020-10-26 19:29:30,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:30,541 INFO L93 Difference]: Finished difference Result 93 states and 112 transitions. [2020-10-26 19:29:30,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:29:30,542 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-26 19:29:30,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:30,543 INFO L225 Difference]: With dead ends: 93 [2020-10-26 19:29:30,544 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:29:30,545 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:29:30,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:29:30,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 57. [2020-10-26 19:29:30,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-26 19:29:30,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 66 transitions. [2020-10-26 19:29:30,559 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 66 transitions. Word has length 47 [2020-10-26 19:29:30,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:30,559 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 66 transitions. [2020-10-26 19:29:30,560 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:29:30,560 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 66 transitions. [2020-10-26 19:29:30,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-26 19:29:30,561 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:30,561 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:30,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:29:30,564 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:30,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:30,564 INFO L82 PathProgramCache]: Analyzing trace with hash 132915861, now seen corresponding path program 7 times [2020-10-26 19:29:30,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:30,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [84893205] [2020-10-26 19:29:30,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:30,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:30,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:30,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:31,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-26 19:29:35,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:35,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:29:35,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:29:35,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:35,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:29:35,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:35,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:35,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:35,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:35,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:35,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:35,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:35,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:35,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:35,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:35,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:35,750 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:35,750 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:35,757 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2020-10-26 19:29:35,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [84893205] [2020-10-26 19:29:35,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:35,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:29:35,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215559032] [2020-10-26 19:29:35,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:29:35,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:35,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:29:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:35,761 INFO L87 Difference]: Start difference. First operand 57 states and 66 transitions. Second operand 11 states. [2020-10-26 19:29:35,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:35,962 INFO L93 Difference]: Finished difference Result 101 states and 122 transitions. [2020-10-26 19:29:35,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:29:35,963 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-26 19:29:35,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:35,964 INFO L225 Difference]: With dead ends: 101 [2020-10-26 19:29:35,964 INFO L226 Difference]: Without dead ends: 65 [2020-10-26 19:29:35,965 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:29:35,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-26 19:29:35,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-26 19:29:35,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-26 19:29:35,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 72 transitions. [2020-10-26 19:29:35,973 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 72 transitions. Word has length 52 [2020-10-26 19:29:35,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:35,973 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 72 transitions. [2020-10-26 19:29:35,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:29:35,974 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 72 transitions. [2020-10-26 19:29:35,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-26 19:29:35,975 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:35,975 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:35,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:29:35,975 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:35,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:35,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1974367623, now seen corresponding path program 8 times [2020-10-26 19:29:35,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:35,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1268862786] [2020-10-26 19:29:35,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:35,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:36,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:36,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:37,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:41,004 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-26 19:29:41,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:41,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:29:41,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:29:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:41,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:29:41,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:41,135 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:41,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:41,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:41,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:41,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:41,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:29:41,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:41,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:41,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:41,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:41,149 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2020-10-26 19:29:41,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1268862786] [2020-10-26 19:29:41,150 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:41,150 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:29:41,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685476383] [2020-10-26 19:29:41,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:29:41,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:41,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:29:41,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:41,152 INFO L87 Difference]: Start difference. First operand 62 states and 72 transitions. Second operand 12 states. [2020-10-26 19:29:41,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:41,320 INFO L93 Difference]: Finished difference Result 109 states and 132 transitions. [2020-10-26 19:29:41,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:29:41,321 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-26 19:29:41,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:41,322 INFO L225 Difference]: With dead ends: 109 [2020-10-26 19:29:41,322 INFO L226 Difference]: Without dead ends: 70 [2020-10-26 19:29:41,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:29:41,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-26 19:29:41,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 67. [2020-10-26 19:29:41,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-26 19:29:41,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2020-10-26 19:29:41,340 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 57 [2020-10-26 19:29:41,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:41,340 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2020-10-26 19:29:41,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:29:41,340 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2020-10-26 19:29:41,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-26 19:29:41,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:41,342 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:41,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:29:41,344 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:41,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:41,345 INFO L82 PathProgramCache]: Analyzing trace with hash -2046750183, now seen corresponding path program 9 times [2020-10-26 19:29:41,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:41,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2143557772] [2020-10-26 19:29:41,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:41,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:41,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:41,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:43,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:46,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-26 19:29:46,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:46,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:29:46,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:46,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:29:46,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:46,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:29:46,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:46,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:46,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:46,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:46,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:46,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:46,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:46,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:46,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:46,548 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2020-10-26 19:29:46,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2143557772] [2020-10-26 19:29:46,549 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:46,549 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:29:46,549 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332260014] [2020-10-26 19:29:46,550 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:29:46,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:29:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:29:46,551 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand 13 states. [2020-10-26 19:29:46,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:46,814 INFO L93 Difference]: Finished difference Result 117 states and 142 transitions. [2020-10-26 19:29:46,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:29:46,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-26 19:29:46,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:46,816 INFO L225 Difference]: With dead ends: 117 [2020-10-26 19:29:46,816 INFO L226 Difference]: Without dead ends: 75 [2020-10-26 19:29:46,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:29:46,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-26 19:29:46,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-26 19:29:46,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:29:46,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 84 transitions. [2020-10-26 19:29:46,825 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 84 transitions. Word has length 62 [2020-10-26 19:29:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:46,825 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 84 transitions. [2020-10-26 19:29:46,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:29:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 84 transitions. [2020-10-26 19:29:46,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:29:46,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:46,827 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:46,827 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:29:46,827 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:46,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:46,828 INFO L82 PathProgramCache]: Analyzing trace with hash -74719499, now seen corresponding path program 10 times [2020-10-26 19:29:46,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:46,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578972751] [2020-10-26 19:29:46,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:46,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:46,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:46,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:49,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:51,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:51,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:29:51,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:51,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:29:51,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:29:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:51,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:29:51,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:52,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:52,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:52,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:52,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:52,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:52,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:29:52,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:52,063 INFO L134 CoverageAnalysis]: Checked inductivity of 245 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2020-10-26 19:29:52,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578972751] [2020-10-26 19:29:52,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:52,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:29:52,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073434054] [2020-10-26 19:29:52,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:29:52,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:52,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:29:52,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:29:52,067 INFO L87 Difference]: Start difference. First operand 72 states and 84 transitions. Second operand 14 states. [2020-10-26 19:29:52,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:52,308 INFO L93 Difference]: Finished difference Result 125 states and 152 transitions. [2020-10-26 19:29:52,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:29:52,309 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-26 19:29:52,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:52,310 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:29:52,311 INFO L226 Difference]: Without dead ends: 80 [2020-10-26 19:29:52,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:29:52,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-26 19:29:52,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 77. [2020-10-26 19:29:52,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-26 19:29:52,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 90 transitions. [2020-10-26 19:29:52,318 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 90 transitions. Word has length 67 [2020-10-26 19:29:52,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:52,319 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 90 transitions. [2020-10-26 19:29:52,319 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:29:52,319 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 90 transitions. [2020-10-26 19:29:52,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-26 19:29:52,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:52,320 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:52,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:29:52,320 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:52,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:52,321 INFO L82 PathProgramCache]: Analyzing trace with hash -442332771, now seen corresponding path program 11 times [2020-10-26 19:29:52,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:52,321 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798121626] [2020-10-26 19:29:52,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:52,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:52,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:55,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:57,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-26 19:29:57,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:29:57,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:29:57,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:57,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:29:57,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:57,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:29:57,352 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:57,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:57,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:57,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:57,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:57,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:57,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:57,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:57,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:57,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:57,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:57,586 INFO L134 CoverageAnalysis]: Checked inductivity of 297 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2020-10-26 19:29:57,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798121626] [2020-10-26 19:29:57,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:57,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:29:57,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021903448] [2020-10-26 19:29:57,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:29:57,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:57,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:29:57,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:29:57,590 INFO L87 Difference]: Start difference. First operand 77 states and 90 transitions. Second operand 15 states. [2020-10-26 19:29:57,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:57,786 INFO L93 Difference]: Finished difference Result 133 states and 162 transitions. [2020-10-26 19:29:57,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:29:57,787 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2020-10-26 19:29:57,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:57,788 INFO L225 Difference]: With dead ends: 133 [2020-10-26 19:29:57,788 INFO L226 Difference]: Without dead ends: 85 [2020-10-26 19:29:57,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:29:57,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-26 19:29:57,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 82. [2020-10-26 19:29:57,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-26 19:29:57,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 96 transitions. [2020-10-26 19:29:57,807 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 96 transitions. Word has length 72 [2020-10-26 19:29:57,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:57,808 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 96 transitions. [2020-10-26 19:29:57,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:29:57,808 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 96 transitions. [2020-10-26 19:29:57,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-26 19:29:57,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:57,815 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:57,815 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:29:57,815 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:57,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:57,816 INFO L82 PathProgramCache]: Analyzing trace with hash -188511375, now seen corresponding path program 12 times [2020-10-26 19:29:57,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:57,816 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1482994051] [2020-10-26 19:29:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:57,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:57,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:57,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:01,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:02,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:02,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-26 19:30:02,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:02,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-26 19:30:02,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:30:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:02,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:30:02,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:03,073 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:03,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:03,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:03,080 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:03,080 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:03,080 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:03,080 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:03,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:03,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2020-10-26 19:30:03,095 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1482994051] [2020-10-26 19:30:03,095 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:03,096 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:30:03,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257072731] [2020-10-26 19:30:03,096 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:30:03,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:03,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:30:03,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:03,098 INFO L87 Difference]: Start difference. First operand 82 states and 96 transitions. Second operand 16 states. [2020-10-26 19:30:03,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:03,400 INFO L93 Difference]: Finished difference Result 141 states and 172 transitions. [2020-10-26 19:30:03,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:30:03,400 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-26 19:30:03,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:03,401 INFO L225 Difference]: With dead ends: 141 [2020-10-26 19:30:03,401 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:30:03,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:30:03,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:30:03,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 87. [2020-10-26 19:30:03,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-26 19:30:03,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 102 transitions. [2020-10-26 19:30:03,409 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 102 transitions. Word has length 77 [2020-10-26 19:30:03,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:03,410 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 102 transitions. [2020-10-26 19:30:03,410 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:30:03,410 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 102 transitions. [2020-10-26 19:30:03,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-26 19:30:03,411 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:03,411 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:03,411 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:30:03,412 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:03,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:03,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1338193631, now seen corresponding path program 13 times [2020-10-26 19:30:03,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:03,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533032504] [2020-10-26 19:30:03,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:03,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:03,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:03,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:08,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:08,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-26 19:30:08,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:08,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:30:08,453 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:30:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:08,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:30:08,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:08,659 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:08,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:08,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:08,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:08,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:08,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:08,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:08,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:08,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:08,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:08,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:08,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:08,675 INFO L134 CoverageAnalysis]: Checked inductivity of 416 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2020-10-26 19:30:08,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533032504] [2020-10-26 19:30:08,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:08,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:30:08,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674218962] [2020-10-26 19:30:08,676 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:30:08,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:08,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:30:08,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:08,678 INFO L87 Difference]: Start difference. First operand 87 states and 102 transitions. Second operand 17 states. [2020-10-26 19:30:08,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:08,953 INFO L93 Difference]: Finished difference Result 149 states and 182 transitions. [2020-10-26 19:30:08,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:30:08,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-26 19:30:08,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:08,955 INFO L225 Difference]: With dead ends: 149 [2020-10-26 19:30:08,956 INFO L226 Difference]: Without dead ends: 95 [2020-10-26 19:30:08,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:30:08,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-26 19:30:08,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 92. [2020-10-26 19:30:08,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-26 19:30:08,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 108 transitions. [2020-10-26 19:30:08,972 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 108 transitions. Word has length 82 [2020-10-26 19:30:08,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:08,973 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 108 transitions. [2020-10-26 19:30:08,973 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:30:08,973 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 108 transitions. [2020-10-26 19:30:08,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-26 19:30:08,974 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:08,974 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:08,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:30:08,974 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:08,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:08,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1827909651, now seen corresponding path program 14 times [2020-10-26 19:30:08,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:08,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1187951905] [2020-10-26 19:30:08,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:08,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:09,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:09,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:14,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-26 19:30:14,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:14,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:30:14,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:14,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:30:14,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:14,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:30:14,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:14,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:14,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,240 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:14,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:14,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:14,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:30:14,241 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:14,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:14,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:14,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:14,250 INFO L134 CoverageAnalysis]: Checked inductivity of 483 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2020-10-26 19:30:14,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1187951905] [2020-10-26 19:30:14,252 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:14,253 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:30:14,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245538519] [2020-10-26 19:30:14,253 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:30:14,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:14,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:30:14,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:14,255 INFO L87 Difference]: Start difference. First operand 92 states and 108 transitions. Second operand 18 states. [2020-10-26 19:30:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:14,564 INFO L93 Difference]: Finished difference Result 157 states and 192 transitions. [2020-10-26 19:30:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:30:14,565 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-26 19:30:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:14,566 INFO L225 Difference]: With dead ends: 157 [2020-10-26 19:30:14,566 INFO L226 Difference]: Without dead ends: 100 [2020-10-26 19:30:14,567 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:30:14,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-26 19:30:14,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 97. [2020-10-26 19:30:14,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-26 19:30:14,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 114 transitions. [2020-10-26 19:30:14,576 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 114 transitions. Word has length 87 [2020-10-26 19:30:14,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:14,577 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 114 transitions. [2020-10-26 19:30:14,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:30:14,578 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 114 transitions. [2020-10-26 19:30:14,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-26 19:30:14,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:14,579 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:14,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:30:14,579 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:14,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:14,580 INFO L82 PathProgramCache]: Analyzing trace with hash -482602843, now seen corresponding path program 15 times [2020-10-26 19:30:14,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:14,581 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006157210] [2020-10-26 19:30:14,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:14,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:14,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:14,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:19,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 102 [2020-10-26 19:30:19,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:19,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:30:19,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:19,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:30:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:19,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:30:19,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:19,881 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:19,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:19,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:19,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:19,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:19,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:19,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:19,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:19,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:19,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:19,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:19,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 555 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:30:19,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006157210] [2020-10-26 19:30:19,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:19,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:30:19,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276037606] [2020-10-26 19:30:19,894 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:30:19,895 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:19,895 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:30:19,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:19,896 INFO L87 Difference]: Start difference. First operand 97 states and 114 transitions. Second operand 19 states. [2020-10-26 19:30:20,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:20,243 INFO L93 Difference]: Finished difference Result 165 states and 202 transitions. [2020-10-26 19:30:20,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:30:20,244 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2020-10-26 19:30:20,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:20,244 INFO L225 Difference]: With dead ends: 165 [2020-10-26 19:30:20,245 INFO L226 Difference]: Without dead ends: 105 [2020-10-26 19:30:20,245 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:30:20,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-26 19:30:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-26 19:30:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:30:20,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 120 transitions. [2020-10-26 19:30:20,251 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 120 transitions. Word has length 92 [2020-10-26 19:30:20,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:20,251 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 120 transitions. [2020-10-26 19:30:20,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:30:20,251 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 120 transitions. [2020-10-26 19:30:20,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:30:20,252 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:20,252 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:20,252 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:30:20,253 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:20,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:20,253 INFO L82 PathProgramCache]: Analyzing trace with hash -42341271, now seen corresponding path program 16 times [2020-10-26 19:30:20,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:20,254 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [710845023] [2020-10-26 19:30:20,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:20,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:20,289 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:20,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,280 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:25,280 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:30:25,281 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:30:25,281 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:30:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:25,281 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:30:25,281 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:25,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:25,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:25,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:25,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:25,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:25,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:25,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:25,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:25,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:25,588 INFO L134 CoverageAnalysis]: Checked inductivity of 632 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2020-10-26 19:30:25,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [710845023] [2020-10-26 19:30:25,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:25,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:30:25,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714154535] [2020-10-26 19:30:25,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:30:25,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:25,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:30:25,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:30:25,591 INFO L87 Difference]: Start difference. First operand 102 states and 120 transitions. Second operand 20 states. [2020-10-26 19:30:25,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:25,871 INFO L93 Difference]: Finished difference Result 173 states and 212 transitions. [2020-10-26 19:30:25,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:30:25,872 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-10-26 19:30:25,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:25,873 INFO L225 Difference]: With dead ends: 173 [2020-10-26 19:30:25,873 INFO L226 Difference]: Without dead ends: 110 [2020-10-26 19:30:25,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:30:25,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-26 19:30:25,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 107. [2020-10-26 19:30:25,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-26 19:30:25,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 126 transitions. [2020-10-26 19:30:25,880 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 126 transitions. Word has length 97 [2020-10-26 19:30:25,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:25,880 INFO L481 AbstractCegarLoop]: Abstraction has 107 states and 126 transitions. [2020-10-26 19:30:25,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:30:25,880 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 126 transitions. [2020-10-26 19:30:25,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-26 19:30:25,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:25,881 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:25,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:30:25,882 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:25,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:25,882 INFO L82 PathProgramCache]: Analyzing trace with hash -200499159, now seen corresponding path program 17 times [2020-10-26 19:30:25,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:25,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905617964] [2020-10-26 19:30:25,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:25,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:25,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:25,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:30,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:30,966 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-10-26 19:30:30,966 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:30,966 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5060 [2020-10-26 19:30:30,966 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:30:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:30,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:30:30,967 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:31,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:31,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:31,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:31,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:31,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:31,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:31,284 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:31,284 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:31,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:31,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:31,295 INFO L134 CoverageAnalysis]: Checked inductivity of 714 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2020-10-26 19:30:31,296 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905617964] [2020-10-26 19:30:31,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:31,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:30:31,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95117753] [2020-10-26 19:30:31,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:30:31,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:30:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:31,298 INFO L87 Difference]: Start difference. First operand 107 states and 126 transitions. Second operand 21 states. [2020-10-26 19:30:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:31,612 INFO L93 Difference]: Finished difference Result 181 states and 222 transitions. [2020-10-26 19:30:31,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:30:31,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 102 [2020-10-26 19:30:31,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:31,614 INFO L225 Difference]: With dead ends: 181 [2020-10-26 19:30:31,614 INFO L226 Difference]: Without dead ends: 115 [2020-10-26 19:30:31,615 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:30:31,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-26 19:30:31,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 112. [2020-10-26 19:30:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-26 19:30:31,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 132 transitions. [2020-10-26 19:30:31,626 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 132 transitions. Word has length 102 [2020-10-26 19:30:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:31,627 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 132 transitions. [2020-10-26 19:30:31,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:30:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 132 transitions. [2020-10-26 19:30:31,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-26 19:30:31,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:31,628 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:31,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:30:31,629 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:31,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1629495525, now seen corresponding path program 18 times [2020-10-26 19:30:31,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:31,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1406870138] [2020-10-26 19:30:31,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:31,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:31,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:31,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:36,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:36,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 117 [2020-10-26 19:30:36,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:36,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-26 19:30:36,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:36,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:30:36,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:36,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:30:36,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:37,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:37,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:37,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:37,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:37,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:37,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:37,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:37,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:37,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:37,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:37,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:37,043 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2020-10-26 19:30:37,044 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1406870138] [2020-10-26 19:30:37,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:37,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:30:37,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671591980] [2020-10-26 19:30:37,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:30:37,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:37,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:30:37,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:30:37,046 INFO L87 Difference]: Start difference. First operand 112 states and 132 transitions. Second operand 22 states. [2020-10-26 19:30:37,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:37,424 INFO L93 Difference]: Finished difference Result 189 states and 232 transitions. [2020-10-26 19:30:37,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:30:37,425 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-10-26 19:30:37,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:37,426 INFO L225 Difference]: With dead ends: 189 [2020-10-26 19:30:37,427 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:30:37,427 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:30:37,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:30:37,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 117. [2020-10-26 19:30:37,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-26 19:30:37,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 138 transitions. [2020-10-26 19:30:37,434 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 138 transitions. Word has length 107 [2020-10-26 19:30:37,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:37,435 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 138 transitions. [2020-10-26 19:30:37,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:30:37,435 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 138 transitions. [2020-10-26 19:30:37,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-26 19:30:37,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:37,436 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:37,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:30:37,436 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:37,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:37,437 INFO L82 PathProgramCache]: Analyzing trace with hash -736446547, now seen corresponding path program 19 times [2020-10-26 19:30:37,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:37,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [492335228] [2020-10-26 19:30:37,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:37,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:37,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:37,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 122 [2020-10-26 19:30:42,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:42,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-26 19:30:42,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:30:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:42,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:30:42,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:42,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:42,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 893 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2020-10-26 19:30:42,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [492335228] [2020-10-26 19:30:42,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:42,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:30:42,868 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974150116] [2020-10-26 19:30:42,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:30:42,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:42,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:30:42,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:30:42,870 INFO L87 Difference]: Start difference. First operand 117 states and 138 transitions. Second operand 23 states. [2020-10-26 19:30:43,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:43,283 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2020-10-26 19:30:43,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:30:43,283 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-10-26 19:30:43,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:43,285 INFO L225 Difference]: With dead ends: 197 [2020-10-26 19:30:43,285 INFO L226 Difference]: Without dead ends: 125 [2020-10-26 19:30:43,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:30:43,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-26 19:30:43,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-26 19:30:43,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-26 19:30:43,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 144 transitions. [2020-10-26 19:30:43,293 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 144 transitions. Word has length 112 [2020-10-26 19:30:43,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:43,293 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 144 transitions. [2020-10-26 19:30:43,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:30:43,293 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 144 transitions. [2020-10-26 19:30:43,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-26 19:30:43,294 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:43,295 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:43,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:30:43,295 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:43,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:43,295 INFO L82 PathProgramCache]: Analyzing trace with hash -317543071, now seen corresponding path program 20 times [2020-10-26 19:30:43,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:43,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [509167841] [2020-10-26 19:30:43,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:43,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:43,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,348 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:48,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 127 [2020-10-26 19:30:48,349 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:30:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:30:48,349 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:30:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:48,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-26 19:30:48,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:48,779 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:48,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:48,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:48,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:48,784 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:48,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:48,785 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:48,785 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:48,785 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:48,785 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:48,799 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2020-10-26 19:30:48,799 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [509167841] [2020-10-26 19:30:48,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:48,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:30:48,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905781551] [2020-10-26 19:30:48,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:30:48,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:48,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:30:48,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:30:48,801 INFO L87 Difference]: Start difference. First operand 122 states and 144 transitions. Second operand 24 states. [2020-10-26 19:30:49,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:49,222 INFO L93 Difference]: Finished difference Result 205 states and 252 transitions. [2020-10-26 19:30:49,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:30:49,226 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-26 19:30:49,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:49,227 INFO L225 Difference]: With dead ends: 205 [2020-10-26 19:30:49,227 INFO L226 Difference]: Without dead ends: 130 [2020-10-26 19:30:49,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:30:49,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-26 19:30:49,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 127. [2020-10-26 19:30:49,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-26 19:30:49,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2020-10-26 19:30:49,235 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 117 [2020-10-26 19:30:49,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:49,235 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2020-10-26 19:30:49,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:30:49,235 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2020-10-26 19:30:49,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-26 19:30:49,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:49,236 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:49,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:30:49,237 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:49,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:49,237 INFO L82 PathProgramCache]: Analyzing trace with hash -187525327, now seen corresponding path program 21 times [2020-10-26 19:30:49,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:49,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043816628] [2020-10-26 19:30:49,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:49,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:52,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:54,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:54,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 132 [2020-10-26 19:30:54,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:30:54,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:30:54,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:30:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:30:54,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-26 19:30:54,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:54,705 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:30:54,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:54,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:54,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:30:54,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:30:54,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:30:54,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:30:54,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:30:54,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:30:54,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:30:54,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:30:54,711 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:30:54,723 INFO L134 CoverageAnalysis]: Checked inductivity of 1092 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2020-10-26 19:30:54,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043816628] [2020-10-26 19:30:54,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:30:54,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:30:54,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521411665] [2020-10-26 19:30:54,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:30:54,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:30:54,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:30:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:30:54,727 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand 25 states. [2020-10-26 19:30:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:30:55,067 INFO L93 Difference]: Finished difference Result 213 states and 262 transitions. [2020-10-26 19:30:55,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:30:55,067 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2020-10-26 19:30:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:30:55,068 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:30:55,069 INFO L226 Difference]: Without dead ends: 135 [2020-10-26 19:30:55,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:30:55,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-26 19:30:55,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2020-10-26 19:30:55,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:30:55,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 156 transitions. [2020-10-26 19:30:55,077 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 156 transitions. Word has length 122 [2020-10-26 19:30:55,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:30:55,077 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 156 transitions. [2020-10-26 19:30:55,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:30:55,077 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 156 transitions. [2020-10-26 19:30:55,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 19:30:55,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:30:55,079 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:30:55,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:30:55,079 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:30:55,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:30:55,080 INFO L82 PathProgramCache]: Analyzing trace with hash -832220707, now seen corresponding path program 22 times [2020-10-26 19:30:55,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:30:55,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538110955] [2020-10-26 19:30:55,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:30:55,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:30:55,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:56,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:30:57,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:00,137 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:00,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-26 19:31:00,138 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-26 19:31:00,138 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:31:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:00,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-26 19:31:00,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:00,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:00,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:00,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:00,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:00,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:00,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:00,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:00,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:00,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:00,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:00,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1199 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 715 trivial. 0 not checked. [2020-10-26 19:31:00,630 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538110955] [2020-10-26 19:31:00,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:00,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:31:00,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088409645] [2020-10-26 19:31:00,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:31:00,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:00,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:31:00,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:31:00,632 INFO L87 Difference]: Start difference. First operand 132 states and 156 transitions. Second operand 26 states. [2020-10-26 19:31:00,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:00,958 INFO L93 Difference]: Finished difference Result 221 states and 272 transitions. [2020-10-26 19:31:00,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:31:00,959 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-10-26 19:31:00,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:00,961 INFO L225 Difference]: With dead ends: 221 [2020-10-26 19:31:00,961 INFO L226 Difference]: Without dead ends: 140 [2020-10-26 19:31:00,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:31:00,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-26 19:31:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 137. [2020-10-26 19:31:00,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-26 19:31:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 162 transitions. [2020-10-26 19:31:00,968 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 162 transitions. Word has length 127 [2020-10-26 19:31:00,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:00,968 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 162 transitions. [2020-10-26 19:31:00,968 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:31:00,968 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 162 transitions. [2020-10-26 19:31:00,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-26 19:31:00,969 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:00,970 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:00,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:31:00,970 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:00,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:00,970 INFO L82 PathProgramCache]: Analyzing trace with hash 1268809397, now seen corresponding path program 23 times [2020-10-26 19:31:00,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:00,971 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454121053] [2020-10-26 19:31:00,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:01,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:02,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:03,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,038 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:06,038 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 142 [2020-10-26 19:31:06,038 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:06,038 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-26 19:31:06,038 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:31:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:06,039 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-26 19:31:06,039 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:06,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:06,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:06,510 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:06,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1311 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 782 trivial. 0 not checked. [2020-10-26 19:31:06,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454121053] [2020-10-26 19:31:06,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:06,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:31:06,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763746719] [2020-10-26 19:31:06,523 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:31:06,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:06,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:31:06,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:31:06,524 INFO L87 Difference]: Start difference. First operand 137 states and 162 transitions. Second operand 27 states. [2020-10-26 19:31:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:06,988 INFO L93 Difference]: Finished difference Result 229 states and 282 transitions. [2020-10-26 19:31:06,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:31:06,989 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2020-10-26 19:31:06,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:06,990 INFO L225 Difference]: With dead ends: 229 [2020-10-26 19:31:06,991 INFO L226 Difference]: Without dead ends: 145 [2020-10-26 19:31:06,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:31:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-26 19:31:06,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-26 19:31:06,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-26 19:31:06,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 168 transitions. [2020-10-26 19:31:06,998 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 168 transitions. Word has length 132 [2020-10-26 19:31:06,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:06,999 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 168 transitions. [2020-10-26 19:31:06,999 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:31:06,999 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 168 transitions. [2020-10-26 19:31:07,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-26 19:31:07,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:07,000 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:07,000 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:31:07,001 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:07,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:07,001 INFO L82 PathProgramCache]: Analyzing trace with hash 741068377, now seen corresponding path program 24 times [2020-10-26 19:31:07,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:07,001 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793825294] [2020-10-26 19:31:07,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:07,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:07,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:07,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-26 19:31:12,075 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:12,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:12,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:12,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:12,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:12,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:12,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:12,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:31:12,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:12,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:12,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:12,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:12,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:12,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1428 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 852 trivial. 0 not checked. [2020-10-26 19:31:12,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793825294] [2020-10-26 19:31:12,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:12,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:31:12,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985669721] [2020-10-26 19:31:12,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:31:12,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:12,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:31:12,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:31:12,662 INFO L87 Difference]: Start difference. First operand 142 states and 168 transitions. Second operand 28 states. [2020-10-26 19:31:13,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:13,138 INFO L93 Difference]: Finished difference Result 237 states and 292 transitions. [2020-10-26 19:31:13,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:31:13,138 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2020-10-26 19:31:13,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:13,139 INFO L225 Difference]: With dead ends: 237 [2020-10-26 19:31:13,139 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:31:13,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:31:13,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:31:13,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 147. [2020-10-26 19:31:13,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-26 19:31:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 174 transitions. [2020-10-26 19:31:13,147 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 174 transitions. Word has length 137 [2020-10-26 19:31:13,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:13,147 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 174 transitions. [2020-10-26 19:31:13,147 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:31:13,147 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 174 transitions. [2020-10-26 19:31:13,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-26 19:31:13,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:13,149 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:13,149 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:31:13,149 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:13,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:13,150 INFO L82 PathProgramCache]: Analyzing trace with hash 1441836601, now seen corresponding path program 25 times [2020-10-26 19:31:13,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:13,150 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307799424] [2020-10-26 19:31:13,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:13,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:13,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:14,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:18,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:18,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 152 [2020-10-26 19:31:18,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:18,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-26 19:31:18,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:31:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:18,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-26 19:31:18,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:18,801 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:18,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:18,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:18,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:18,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:18,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:31:18,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:18,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:18,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:18,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:18,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:18,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1550 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 925 trivial. 0 not checked. [2020-10-26 19:31:18,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307799424] [2020-10-26 19:31:18,834 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:18,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:31:18,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110864615] [2020-10-26 19:31:18,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:31:18,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:18,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:31:18,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:31:18,837 INFO L87 Difference]: Start difference. First operand 147 states and 174 transitions. Second operand 29 states. [2020-10-26 19:31:19,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:19,285 INFO L93 Difference]: Finished difference Result 245 states and 302 transitions. [2020-10-26 19:31:19,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:31:19,286 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-10-26 19:31:19,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:19,287 INFO L225 Difference]: With dead ends: 245 [2020-10-26 19:31:19,287 INFO L226 Difference]: Without dead ends: 155 [2020-10-26 19:31:19,288 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:31:19,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-26 19:31:19,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-26 19:31:19,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-26 19:31:19,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 180 transitions. [2020-10-26 19:31:19,295 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 180 transitions. Word has length 142 [2020-10-26 19:31:19,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:19,296 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 180 transitions. [2020-10-26 19:31:19,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:31:19,296 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 180 transitions. [2020-10-26 19:31:19,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-26 19:31:19,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:19,297 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:19,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:31:19,297 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:19,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:19,298 INFO L82 PathProgramCache]: Analyzing trace with hash 595190485, now seen corresponding path program 26 times [2020-10-26 19:31:19,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:19,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535699782] [2020-10-26 19:31:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:19,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:21,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:23,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:24,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:24,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 157 [2020-10-26 19:31:24,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:31:24,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5072 [2020-10-26 19:31:24,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:24,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:31:24,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:24,403 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-26 19:31:24,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:25,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:25,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:25,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:25,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:25,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:25,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:25,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:31:25,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:25,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:25,033 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:25,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1677 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 1001 trivial. 0 not checked. [2020-10-26 19:31:25,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535699782] [2020-10-26 19:31:25,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:25,069 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:31:25,069 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077653431] [2020-10-26 19:31:25,070 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:31:25,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:25,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:31:25,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:31:25,071 INFO L87 Difference]: Start difference. First operand 152 states and 180 transitions. Second operand 30 states. [2020-10-26 19:31:25,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:25,567 INFO L93 Difference]: Finished difference Result 253 states and 312 transitions. [2020-10-26 19:31:25,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:31:25,570 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-10-26 19:31:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:25,571 INFO L225 Difference]: With dead ends: 253 [2020-10-26 19:31:25,571 INFO L226 Difference]: Without dead ends: 160 [2020-10-26 19:31:25,572 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:31:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-26 19:31:25,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 157. [2020-10-26 19:31:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-26 19:31:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 186 transitions. [2020-10-26 19:31:25,577 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 186 transitions. Word has length 147 [2020-10-26 19:31:25,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:25,578 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 186 transitions. [2020-10-26 19:31:25,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:31:25,578 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 186 transitions. [2020-10-26 19:31:25,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-26 19:31:25,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:25,579 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:25,579 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:31:25,579 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:25,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:25,580 INFO L82 PathProgramCache]: Analyzing trace with hash 489645501, now seen corresponding path program 27 times [2020-10-26 19:31:25,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:25,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271503001] [2020-10-26 19:31:25,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:25,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:25,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:27,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:30,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:30,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 162 [2020-10-26 19:31:30,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:30,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:31:30,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:31:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:30,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-26 19:31:30,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:31,384 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:31,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:31,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:31,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:31,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:31,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:31,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:31,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:31,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:31,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:31,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:31,414 INFO L134 CoverageAnalysis]: Checked inductivity of 1809 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 1080 trivial. 0 not checked. [2020-10-26 19:31:31,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271503001] [2020-10-26 19:31:31,414 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:31,414 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:31:31,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759022028] [2020-10-26 19:31:31,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:31:31,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:31,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:31:31,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:31:31,417 INFO L87 Difference]: Start difference. First operand 157 states and 186 transitions. Second operand 31 states. [2020-10-26 19:31:31,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:31,963 INFO L93 Difference]: Finished difference Result 261 states and 322 transitions. [2020-10-26 19:31:31,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:31:31,964 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2020-10-26 19:31:31,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:31,966 INFO L225 Difference]: With dead ends: 261 [2020-10-26 19:31:31,966 INFO L226 Difference]: Without dead ends: 165 [2020-10-26 19:31:31,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:31:31,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-26 19:31:31,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 162. [2020-10-26 19:31:31,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:31:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 192 transitions. [2020-10-26 19:31:31,974 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 192 transitions. Word has length 152 [2020-10-26 19:31:31,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:31,975 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 192 transitions. [2020-10-26 19:31:31,975 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:31:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 192 transitions. [2020-10-26 19:31:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:31:31,976 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:31,976 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:31,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:31:31,977 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:31,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1016901807, now seen corresponding path program 28 times [2020-10-26 19:31:31,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:31,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927176131] [2020-10-26 19:31:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:32,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:32,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:32,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:37,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:37,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:31:37,042 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:37,042 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:31:37,042 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:31:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:37,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-26 19:31:37,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:37,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:37,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:37,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:37,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:37,825 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:37,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:37,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:31:37,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:37,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:37,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:37,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:37,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:37,850 INFO L134 CoverageAnalysis]: Checked inductivity of 1946 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 1162 trivial. 0 not checked. [2020-10-26 19:31:37,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927176131] [2020-10-26 19:31:37,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:37,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:31:37,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023045652] [2020-10-26 19:31:37,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:31:37,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:37,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:31:37,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:31:37,853 INFO L87 Difference]: Start difference. First operand 162 states and 192 transitions. Second operand 32 states. [2020-10-26 19:31:38,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:38,386 INFO L93 Difference]: Finished difference Result 269 states and 332 transitions. [2020-10-26 19:31:38,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:31:38,387 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 157 [2020-10-26 19:31:38,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:38,389 INFO L225 Difference]: With dead ends: 269 [2020-10-26 19:31:38,389 INFO L226 Difference]: Without dead ends: 170 [2020-10-26 19:31:38,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:31:38,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-26 19:31:38,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 167. [2020-10-26 19:31:38,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-26 19:31:38,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 198 transitions. [2020-10-26 19:31:38,396 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 198 transitions. Word has length 157 [2020-10-26 19:31:38,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:38,396 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 198 transitions. [2020-10-26 19:31:38,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:31:38,396 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 198 transitions. [2020-10-26 19:31:38,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-26 19:31:38,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:38,398 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:38,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:31:38,398 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:38,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:38,398 INFO L82 PathProgramCache]: Analyzing trace with hash 986244417, now seen corresponding path program 29 times [2020-10-26 19:31:38,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:38,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [325145848] [2020-10-26 19:31:38,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:38,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:38,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:38,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:43,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:43,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 172 [2020-10-26 19:31:43,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:43,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-26 19:31:43,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:31:43,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:43,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-26 19:31:43,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:44,202 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:44,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:44,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:44,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:44,208 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:44,208 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:44,208 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:31:44,208 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:44,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:44,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:44,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:44,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:44,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2088 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 1247 trivial. 0 not checked. [2020-10-26 19:31:44,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [325145848] [2020-10-26 19:31:44,233 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:44,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:31:44,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996219013] [2020-10-26 19:31:44,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:31:44,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:44,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:31:44,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:31:44,235 INFO L87 Difference]: Start difference. First operand 167 states and 198 transitions. Second operand 33 states. [2020-10-26 19:31:44,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:44,806 INFO L93 Difference]: Finished difference Result 277 states and 342 transitions. [2020-10-26 19:31:44,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:31:44,811 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 162 [2020-10-26 19:31:44,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:44,812 INFO L225 Difference]: With dead ends: 277 [2020-10-26 19:31:44,812 INFO L226 Difference]: Without dead ends: 175 [2020-10-26 19:31:44,813 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:31:44,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-26 19:31:44,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 172. [2020-10-26 19:31:44,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-26 19:31:44,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 204 transitions. [2020-10-26 19:31:44,822 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 204 transitions. Word has length 162 [2020-10-26 19:31:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:44,822 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 204 transitions. [2020-10-26 19:31:44,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:31:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 204 transitions. [2020-10-26 19:31:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-26 19:31:44,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:44,823 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:44,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:31:44,825 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 150721485, now seen corresponding path program 30 times [2020-10-26 19:31:44,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:44,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1908297746] [2020-10-26 19:31:44,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:44,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:47,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:49,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:49,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-26 19:31:49,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:49,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5053 [2020-10-26 19:31:49,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:49,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:31:49,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:49,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-26 19:31:49,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:50,706 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:50,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:50,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:50,711 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:50,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:50,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:50,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:31:50,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:50,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:50,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:50,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:50,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:50,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2235 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1335 trivial. 0 not checked. [2020-10-26 19:31:50,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1908297746] [2020-10-26 19:31:50,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:50,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:31:50,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385351810] [2020-10-26 19:31:50,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:31:50,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:50,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:31:50,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:31:50,732 INFO L87 Difference]: Start difference. First operand 172 states and 204 transitions. Second operand 34 states. [2020-10-26 19:31:51,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:51,214 INFO L93 Difference]: Finished difference Result 285 states and 352 transitions. [2020-10-26 19:31:51,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:31:51,214 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-10-26 19:31:51,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:51,217 INFO L225 Difference]: With dead ends: 285 [2020-10-26 19:31:51,218 INFO L226 Difference]: Without dead ends: 180 [2020-10-26 19:31:51,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:31:51,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-26 19:31:51,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 177. [2020-10-26 19:31:51,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-26 19:31:51,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 210 transitions. [2020-10-26 19:31:51,230 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 210 transitions. Word has length 167 [2020-10-26 19:31:51,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:51,231 INFO L481 AbstractCegarLoop]: Abstraction has 177 states and 210 transitions. [2020-10-26 19:31:51,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:31:51,231 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 210 transitions. [2020-10-26 19:31:51,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-26 19:31:51,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:51,232 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:51,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:31:51,232 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash -601264955, now seen corresponding path program 31 times [2020-10-26 19:31:51,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:51,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1732705988] [2020-10-26 19:31:51,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:51,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:51,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:51,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 182 [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-26 19:31:56,294 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:57,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:31:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:57,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:31:57,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:31:57,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:31:57,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:31:57,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:31:57,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:31:57,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:31:57,127 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:31:57,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:31:57,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:31:57,146 INFO L134 CoverageAnalysis]: Checked inductivity of 2387 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 1426 trivial. 0 not checked. [2020-10-26 19:31:57,146 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1732705988] [2020-10-26 19:31:57,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:31:57,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:31:57,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667072491] [2020-10-26 19:31:57,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:31:57,147 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:31:57,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:31:57,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:31:57,149 INFO L87 Difference]: Start difference. First operand 177 states and 210 transitions. Second operand 35 states. [2020-10-26 19:31:57,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:31:57,716 INFO L93 Difference]: Finished difference Result 293 states and 362 transitions. [2020-10-26 19:31:57,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:31:57,717 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 172 [2020-10-26 19:31:57,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:31:57,719 INFO L225 Difference]: With dead ends: 293 [2020-10-26 19:31:57,719 INFO L226 Difference]: Without dead ends: 185 [2020-10-26 19:31:57,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:31:57,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-26 19:31:57,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 182. [2020-10-26 19:31:57,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-26 19:31:57,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 216 transitions. [2020-10-26 19:31:57,733 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 216 transitions. Word has length 172 [2020-10-26 19:31:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:31:57,734 INFO L481 AbstractCegarLoop]: Abstraction has 182 states and 216 transitions. [2020-10-26 19:31:57,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:31:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 216 transitions. [2020-10-26 19:31:57,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-26 19:31:57,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:31:57,736 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:31:57,736 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:31:57,736 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:31:57,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:31:57,737 INFO L82 PathProgramCache]: Analyzing trace with hash -615042999, now seen corresponding path program 32 times [2020-10-26 19:31:57,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:31:57,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196643730] [2020-10-26 19:31:57,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:31:57,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:31:57,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:01,350 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-26 19:32:02,842 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:03,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:03,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:03,702 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:03,703 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:03,703 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:03,703 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:03,703 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:03,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:03,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:03,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:03,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:03,726 INFO L134 CoverageAnalysis]: Checked inductivity of 2544 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 1520 trivial. 0 not checked. [2020-10-26 19:32:03,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196643730] [2020-10-26 19:32:03,726 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:03,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:32:03,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093610681] [2020-10-26 19:32:03,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:32:03,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:03,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:32:03,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:32:03,728 INFO L87 Difference]: Start difference. First operand 182 states and 216 transitions. Second operand 36 states. [2020-10-26 19:32:04,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:04,372 INFO L93 Difference]: Finished difference Result 301 states and 372 transitions. [2020-10-26 19:32:04,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:32:04,372 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-10-26 19:32:04,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:04,374 INFO L225 Difference]: With dead ends: 301 [2020-10-26 19:32:04,374 INFO L226 Difference]: Without dead ends: 190 [2020-10-26 19:32:04,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:32:04,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-26 19:32:04,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 187. [2020-10-26 19:32:04,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-26 19:32:04,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 222 transitions. [2020-10-26 19:32:04,386 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 222 transitions. Word has length 177 [2020-10-26 19:32:04,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:04,386 INFO L481 AbstractCegarLoop]: Abstraction has 187 states and 222 transitions. [2020-10-26 19:32:04,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:32:04,386 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 222 transitions. [2020-10-26 19:32:04,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-26 19:32:04,387 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:04,387 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:04,387 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:32:04,387 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash -960676791, now seen corresponding path program 33 times [2020-10-26 19:32:04,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:04,388 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1650198759] [2020-10-26 19:32:04,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:04,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:08,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 192 [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-26 19:32:09,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:10,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:10,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:10,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:10,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:10,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:10,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:10,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:10,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:10,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:10,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:10,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2706 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 1617 trivial. 0 not checked. [2020-10-26 19:32:10,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1650198759] [2020-10-26 19:32:10,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:10,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:32:10,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525409150] [2020-10-26 19:32:10,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:32:10,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:10,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:32:10,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:32:10,415 INFO L87 Difference]: Start difference. First operand 187 states and 222 transitions. Second operand 37 states. [2020-10-26 19:32:11,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:11,057 INFO L93 Difference]: Finished difference Result 309 states and 382 transitions. [2020-10-26 19:32:11,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:32:11,058 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 182 [2020-10-26 19:32:11,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:11,060 INFO L225 Difference]: With dead ends: 309 [2020-10-26 19:32:11,060 INFO L226 Difference]: Without dead ends: 195 [2020-10-26 19:32:11,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:32:11,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-26 19:32:11,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-10-26 19:32:11,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-26 19:32:11,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 228 transitions. [2020-10-26 19:32:11,069 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 228 transitions. Word has length 182 [2020-10-26 19:32:11,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:11,069 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 228 transitions. [2020-10-26 19:32:11,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:32:11,070 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 228 transitions. [2020-10-26 19:32:11,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 19:32:11,071 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:11,071 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:11,071 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:32:11,071 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:11,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:11,072 INFO L82 PathProgramCache]: Analyzing trace with hash 126428357, now seen corresponding path program 34 times [2020-10-26 19:32:11,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:11,072 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [678939713] [2020-10-26 19:32:11,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:11,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:11,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:15,588 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:16,154 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:16,154 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-26 19:32:16,154 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:16,154 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:32:16,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:32:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:16,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-26 19:32:16,155 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:17,152 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:17,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:17,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:17,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:17,158 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:17,158 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:17,158 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:17,158 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:17,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:17,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:17,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:17,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:17,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2873 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 1717 trivial. 0 not checked. [2020-10-26 19:32:17,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [678939713] [2020-10-26 19:32:17,179 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:17,179 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:32:17,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518606903] [2020-10-26 19:32:17,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:32:17,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:17,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:32:17,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:32:17,181 INFO L87 Difference]: Start difference. First operand 192 states and 228 transitions. Second operand 38 states. [2020-10-26 19:32:17,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:17,832 INFO L93 Difference]: Finished difference Result 317 states and 392 transitions. [2020-10-26 19:32:17,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:32:17,833 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-10-26 19:32:17,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:17,834 INFO L225 Difference]: With dead ends: 317 [2020-10-26 19:32:17,834 INFO L226 Difference]: Without dead ends: 200 [2020-10-26 19:32:17,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:32:17,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-26 19:32:17,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 197. [2020-10-26 19:32:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-26 19:32:17,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 234 transitions. [2020-10-26 19:32:17,842 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 234 transitions. Word has length 187 [2020-10-26 19:32:17,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:17,843 INFO L481 AbstractCegarLoop]: Abstraction has 197 states and 234 transitions. [2020-10-26 19:32:17,843 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:32:17,843 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 234 transitions. [2020-10-26 19:32:17,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-26 19:32:17,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:17,844 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:17,844 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:32:17,844 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:17,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1542493133, now seen corresponding path program 35 times [2020-10-26 19:32:17,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:17,845 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1804967980] [2020-10-26 19:32:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:17,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:17,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:22,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:23,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:23,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 202 [2020-10-26 19:32:23,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:23,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5129 [2020-10-26 19:32:23,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:32:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:23,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:32:23,015 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:24,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:24,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:24,053 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:24,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:24,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:24,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:32:24,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:24,054 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:24,054 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:24,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3045 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 1820 trivial. 0 not checked. [2020-10-26 19:32:24,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1804967980] [2020-10-26 19:32:24,076 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:24,076 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:32:24,076 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528728238] [2020-10-26 19:32:24,077 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:32:24,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:24,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:32:24,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:32:24,078 INFO L87 Difference]: Start difference. First operand 197 states and 234 transitions. Second operand 39 states. [2020-10-26 19:32:24,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:24,697 INFO L93 Difference]: Finished difference Result 325 states and 402 transitions. [2020-10-26 19:32:24,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:32:24,697 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 192 [2020-10-26 19:32:24,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:24,699 INFO L225 Difference]: With dead ends: 325 [2020-10-26 19:32:24,699 INFO L226 Difference]: Without dead ends: 205 [2020-10-26 19:32:24,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:32:24,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-26 19:32:24,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 202. [2020-10-26 19:32:24,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-26 19:32:24,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 240 transitions. [2020-10-26 19:32:24,708 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 240 transitions. Word has length 192 [2020-10-26 19:32:24,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:24,708 INFO L481 AbstractCegarLoop]: Abstraction has 202 states and 240 transitions. [2020-10-26 19:32:24,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:32:24,708 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 240 transitions. [2020-10-26 19:32:24,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-26 19:32:24,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:24,710 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:24,710 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:32:24,710 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:24,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:24,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1017475393, now seen corresponding path program 36 times [2020-10-26 19:32:24,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:24,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871760161] [2020-10-26 19:32:24,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:24,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:29,765 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:29,766 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 207 [2020-10-26 19:32:29,766 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:29,766 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:32:29,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:32:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:29,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-10-26 19:32:29,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:30,854 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:30,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:30,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:30,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:30,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:30,858 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:30,858 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:30,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:30,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:30,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3222 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 1926 trivial. 0 not checked. [2020-10-26 19:32:30,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871760161] [2020-10-26 19:32:30,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:30,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:32:30,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790063552] [2020-10-26 19:32:30,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:32:30,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:30,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:32:30,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:32:30,883 INFO L87 Difference]: Start difference. First operand 202 states and 240 transitions. Second operand 40 states. [2020-10-26 19:32:31,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:31,537 INFO L93 Difference]: Finished difference Result 333 states and 412 transitions. [2020-10-26 19:32:31,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:32:31,538 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 197 [2020-10-26 19:32:31,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:31,539 INFO L225 Difference]: With dead ends: 333 [2020-10-26 19:32:31,539 INFO L226 Difference]: Without dead ends: 210 [2020-10-26 19:32:31,540 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:32:31,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-26 19:32:31,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 207. [2020-10-26 19:32:31,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-26 19:32:31,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 246 transitions. [2020-10-26 19:32:31,549 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 246 transitions. Word has length 197 [2020-10-26 19:32:31,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:31,550 INFO L481 AbstractCegarLoop]: Abstraction has 207 states and 246 transitions. [2020-10-26 19:32:31,550 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:32:31,550 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 246 transitions. [2020-10-26 19:32:31,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-26 19:32:31,551 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:31,552 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:31,552 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:32:31,552 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:31,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:31,552 INFO L82 PathProgramCache]: Analyzing trace with hash -1657818287, now seen corresponding path program 37 times [2020-10-26 19:32:31,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:31,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [118241215] [2020-10-26 19:32:31,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:31,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 212 [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5116 [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-26 19:32:36,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:37,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:37,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:37,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:37,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:37,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:37,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:37,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:37,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:37,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:37,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:37,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:37,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:37,914 INFO L134 CoverageAnalysis]: Checked inductivity of 3404 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 2035 trivial. 0 not checked. [2020-10-26 19:32:37,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [118241215] [2020-10-26 19:32:37,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:37,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:32:37,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885782103] [2020-10-26 19:32:37,915 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:32:37,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:37,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:32:37,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:32:37,916 INFO L87 Difference]: Start difference. First operand 207 states and 246 transitions. Second operand 41 states. [2020-10-26 19:32:38,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:38,674 INFO L93 Difference]: Finished difference Result 341 states and 422 transitions. [2020-10-26 19:32:38,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:32:38,674 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 202 [2020-10-26 19:32:38,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:38,677 INFO L225 Difference]: With dead ends: 341 [2020-10-26 19:32:38,677 INFO L226 Difference]: Without dead ends: 215 [2020-10-26 19:32:38,679 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:32:38,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-26 19:32:38,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2020-10-26 19:32:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-26 19:32:38,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 252 transitions. [2020-10-26 19:32:38,685 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 252 transitions. Word has length 202 [2020-10-26 19:32:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:38,686 INFO L481 AbstractCegarLoop]: Abstraction has 212 states and 252 transitions. [2020-10-26 19:32:38,686 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:32:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 252 transitions. [2020-10-26 19:32:38,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-26 19:32:38,687 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:38,687 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:38,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:32:38,688 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:38,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:38,688 INFO L82 PathProgramCache]: Analyzing trace with hash 130012605, now seen corresponding path program 38 times [2020-10-26 19:32:38,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:38,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1955028502] [2020-10-26 19:32:38,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:38,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:38,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:43,855 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:43,855 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-26 19:32:43,855 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:43,855 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5133 [2020-10-26 19:32:43,855 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:43,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:32:43,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:43,856 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-10-26 19:32:43,856 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:45,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:45,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:45,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:45,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:45,075 INFO L134 CoverageAnalysis]: Checked inductivity of 3591 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 2147 trivial. 0 not checked. [2020-10-26 19:32:45,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1955028502] [2020-10-26 19:32:45,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:45,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:32:45,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282313478] [2020-10-26 19:32:45,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:32:45,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:45,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:32:45,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:32:45,077 INFO L87 Difference]: Start difference. First operand 212 states and 252 transitions. Second operand 42 states. [2020-10-26 19:32:45,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:45,805 INFO L93 Difference]: Finished difference Result 349 states and 432 transitions. [2020-10-26 19:32:45,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:32:45,806 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-10-26 19:32:45,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:45,808 INFO L225 Difference]: With dead ends: 349 [2020-10-26 19:32:45,808 INFO L226 Difference]: Without dead ends: 220 [2020-10-26 19:32:45,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:32:45,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-26 19:32:45,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 217. [2020-10-26 19:32:45,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-26 19:32:45,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 258 transitions. [2020-10-26 19:32:45,816 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 258 transitions. Word has length 207 [2020-10-26 19:32:45,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:45,817 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 258 transitions. [2020-10-26 19:32:45,817 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:32:45,817 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 258 transitions. [2020-10-26 19:32:45,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-26 19:32:45,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:45,819 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:45,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-26 19:32:45,819 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:45,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:45,819 INFO L82 PathProgramCache]: Analyzing trace with hash 803658453, now seen corresponding path program 39 times [2020-10-26 19:32:45,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:45,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357805733] [2020-10-26 19:32:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:45,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:45,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:46,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:50,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:50,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-26 19:32:50,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:50,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5113 [2020-10-26 19:32:50,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-26 19:32:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:50,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-26 19:32:50,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:52,253 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:52,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:52,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:52,257 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:52,257 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:52,257 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:32:52,257 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:52,258 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:52,258 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:52,283 INFO L134 CoverageAnalysis]: Checked inductivity of 3783 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 2262 trivial. 0 not checked. [2020-10-26 19:32:52,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357805733] [2020-10-26 19:32:52,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:52,284 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-26 19:32:52,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754935443] [2020-10-26 19:32:52,284 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-26 19:32:52,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:52,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-26 19:32:52,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:32:52,285 INFO L87 Difference]: Start difference. First operand 217 states and 258 transitions. Second operand 43 states. [2020-10-26 19:32:53,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:32:53,070 INFO L93 Difference]: Finished difference Result 357 states and 442 transitions. [2020-10-26 19:32:53,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-26 19:32:53,070 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 212 [2020-10-26 19:32:53,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:32:53,073 INFO L225 Difference]: With dead ends: 357 [2020-10-26 19:32:53,073 INFO L226 Difference]: Without dead ends: 225 [2020-10-26 19:32:53,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-26 19:32:53,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-26 19:32:53,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 222. [2020-10-26 19:32:53,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-26 19:32:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2020-10-26 19:32:53,082 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 212 [2020-10-26 19:32:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:32:53,083 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2020-10-26 19:32:53,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-26 19:32:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2020-10-26 19:32:53,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 19:32:53,084 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:32:53,084 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:32:53,084 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-26 19:32:53,085 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:32:53,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:32:53,085 INFO L82 PathProgramCache]: Analyzing trace with hash -806612423, now seen corresponding path program 40 times [2020-10-26 19:32:53,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:32:53,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1035434659] [2020-10-26 19:32:53,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:32:53,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:53,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:53,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:58,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:58,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-26 19:32:58,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:32:58,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5070 [2020-10-26 19:32:58,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:32:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:32:58,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-26 19:32:58,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:32:59,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:32:59,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:32:59,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:32:59,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:32:59,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:32:59,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:32:59,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:32:59,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:32:59,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:32:59,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:32:59,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:32:59,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3980 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 2380 trivial. 0 not checked. [2020-10-26 19:32:59,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1035434659] [2020-10-26 19:32:59,576 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:32:59,576 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-26 19:32:59,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742098349] [2020-10-26 19:32:59,577 INFO L461 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-26 19:32:59,577 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:32:59,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-26 19:32:59,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:32:59,578 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand 44 states. [2020-10-26 19:33:00,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:33:00,144 INFO L93 Difference]: Finished difference Result 365 states and 452 transitions. [2020-10-26 19:33:00,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-26 19:33:00,144 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 217 [2020-10-26 19:33:00,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:33:00,147 INFO L225 Difference]: With dead ends: 365 [2020-10-26 19:33:00,147 INFO L226 Difference]: Without dead ends: 230 [2020-10-26 19:33:00,149 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-26 19:33:00,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-26 19:33:00,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 227. [2020-10-26 19:33:00,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-26 19:33:00,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 270 transitions. [2020-10-26 19:33:00,156 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 270 transitions. Word has length 217 [2020-10-26 19:33:00,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:33:00,156 INFO L481 AbstractCegarLoop]: Abstraction has 227 states and 270 transitions. [2020-10-26 19:33:00,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-26 19:33:00,156 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 270 transitions. [2020-10-26 19:33:00,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-26 19:33:00,157 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:33:00,158 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:33:00,158 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-26 19:33:00,158 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:33:00,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:33:00,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1635928665, now seen corresponding path program 41 times [2020-10-26 19:33:00,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:33:00,159 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [921009261] [2020-10-26 19:33:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:33:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:33:00,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking...