/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_init6_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:25:25,812 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:25:25,815 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:25:25,860 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:25:25,861 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:25:25,868 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:25:25,870 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:25:25,875 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:25:25,878 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:25:25,886 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:25:25,888 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:25:25,890 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:25:25,890 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:25:25,894 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:25:25,897 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:25:25,900 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:25:25,901 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:25:25,906 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:25:25,927 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:25:25,934 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:25:25,939 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:25:25,940 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:25:25,943 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:25:25,945 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:25:25,951 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:25:25,952 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:25:25,955 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:25:25,956 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:25:25,957 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:25:25,959 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:25:25,960 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:25:25,961 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:25:25,963 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:25:25,964 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:25:25,965 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:25:25,965 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:25:25,966 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:25:25,966 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:25:25,967 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:25:25,968 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:25:25,968 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:25:25,976 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 19:25:26,030 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:25:26,030 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:25:26,035 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:25:26,035 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:25:26,036 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:25:26,036 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:25:26,036 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:25:26,036 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:25:26,037 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:25:26,037 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:25:26,038 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:25:26,038 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:25:26,039 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:25:26,039 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:25:26,039 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:25:26,039 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:25:26,039 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:25:26,040 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:25:26,040 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:25:26,040 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:25:26,040 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:25:26,041 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:25:26,041 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:25:26,041 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:25:26,041 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:25:26,041 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:25:26,042 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:25:26,042 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:25:26,042 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:25:26,042 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:25:26,428 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:25:26,462 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:25:26,466 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:25:26,467 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:25:26,468 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:25:26,469 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2020-10-26 19:25:26,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f72575c9/1b29792d9cc94e4ab34829257cb5df0f/FLAGdc57cf64b [2020-10-26 19:25:27,133 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:25:27,134 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init6_ground-2.i [2020-10-26 19:25:27,142 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f72575c9/1b29792d9cc94e4ab34829257cb5df0f/FLAGdc57cf64b [2020-10-26 19:25:27,518 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/0f72575c9/1b29792d9cc94e4ab34829257cb5df0f [2020-10-26 19:25:27,523 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:25:27,532 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:25:27,537 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:27,537 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:25:27,542 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:25:27,543 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,552 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3ce04c14 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27, skipping insertion in model container [2020-10-26 19:25:27,552 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,561 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:25:27,583 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:25:27,759 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:27,768 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:25:27,793 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:25:27,810 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:25:27,811 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27 WrapperNode [2020-10-26 19:25:27,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:25:27,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:25:27,813 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:25:27,813 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:25:27,828 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,829 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,837 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,838 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,846 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,853 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,855 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (1/1) ... [2020-10-26 19:25:27,862 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:25:27,863 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:25:27,864 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:25:27,864 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:25:27,865 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (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 19:25:27,949 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:25:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:25:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:25:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:25:27,950 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:25:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:25:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:25:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-26 19:25:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-26 19:25:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:25:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:25:27,951 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:25:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:25:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:25:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:25:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:25:27,952 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:25:27,953 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:25:27,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:25:28,329 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:25:28,330 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-26 19:25:28,331 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:28 BoogieIcfgContainer [2020-10-26 19:25:28,332 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:25:28,334 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:25:28,334 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:25:28,338 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:25:28,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:25:27" (1/3) ... [2020-10-26 19:25:28,339 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d10ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:28, skipping insertion in model container [2020-10-26 19:25:28,339 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:25:27" (2/3) ... [2020-10-26 19:25:28,340 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@42d10ac4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:25:28, skipping insertion in model container [2020-10-26 19:25:28,340 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:25:28" (3/3) ... [2020-10-26 19:25:28,342 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-2.i [2020-10-26 19:25:28,356 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:25:28,361 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:25:28,377 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:25:28,406 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:25:28,407 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:25:28,407 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:25:28,407 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:25:28,407 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:25:28,407 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:25:28,407 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:25:28,407 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:25:28,426 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-26 19:25:28,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-26 19:25:28,433 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:28,434 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:28,434 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:28,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:28,441 INFO L82 PathProgramCache]: Analyzing trace with hash 214825398, now seen corresponding path program 1 times [2020-10-26 19:25:28,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:28,451 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592629546] [2020-10-26 19:25:28,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:28,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:28,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:28,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:28,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:28,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:28,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:28,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,202 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:30,203 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-26 19:25:30,203 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:30,203 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1587 [2020-10-26 19:25:30,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:25:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:30,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:25:30,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:30,308 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:30,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:30,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:30,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:30,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:30,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-26 19:25:30,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:30,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:30,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:30,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:30,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:30,340 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 19:25:30,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592629546] [2020-10-26 19:25:30,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:25:30,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:25:30,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [922881644] [2020-10-26 19:25:30,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:25:30,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:30,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:25:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:25:30,381 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 4 states. [2020-10-26 19:25:30,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:30,619 INFO L93 Difference]: Finished difference Result 72 states and 114 transitions. [2020-10-26 19:25:30,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:25:30,622 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-26 19:25:30,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:30,631 INFO L225 Difference]: With dead ends: 72 [2020-10-26 19:25:30,632 INFO L226 Difference]: Without dead ends: 36 [2020-10-26 19:25:30,636 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 19:25:30,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-26 19:25:30,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-26 19:25:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-26 19:25:30,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-26 19:25:30,689 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-26 19:25:30,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:30,689 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-26 19:25:30,690 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:25:30,690 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-26 19:25:30,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:25:30,691 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:30,692 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:30,692 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:25:30,692 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:30,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:30,694 INFO L82 PathProgramCache]: Analyzing trace with hash -1214100017, now seen corresponding path program 1 times [2020-10-26 19:25:30,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:30,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [769648276] [2020-10-26 19:25:30,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:30,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:30,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:30,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:33,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:35,728 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:25:35,728 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:25:35,729 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:25:35,729 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:35,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:25:35,730 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:35,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-26 19:25:35,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:35,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:35,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:35,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:35,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:35,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:35,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:35,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:25:35,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:35,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:35,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:35,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:35,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-26 19:25:35,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-26 19:25:35,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [769648276] [2020-10-26 19:25:35,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:35,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:25:35,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290600158] [2020-10-26 19:25:35,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:25:35,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:35,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:25:35,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:35,905 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 5 states. [2020-10-26 19:25:36,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:36,202 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2020-10-26 19:25:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:25:36,203 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-26 19:25:36,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:36,204 INFO L225 Difference]: With dead ends: 70 [2020-10-26 19:25:36,205 INFO L226 Difference]: Without dead ends: 42 [2020-10-26 19:25:36,206 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:25:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-26 19:25:36,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-26 19:25:36,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-26 19:25:36,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-26 19:25:36,218 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 31 [2020-10-26 19:25:36,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:36,219 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-26 19:25:36,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:25:36,219 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-26 19:25:36,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-26 19:25:36,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:36,221 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:36,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:25:36,221 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1678914002, now seen corresponding path program 2 times [2020-10-26 19:25:36,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:36,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353825634] [2020-10-26 19:25:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:36,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:36,266 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:36,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,258 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:41,259 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-26 19:25:41,259 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:41,259 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:25:41,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:41,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:25:41,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:41,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:25:41,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:41,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:41,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:41,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:41,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:41,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:41,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:41,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:41,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:41,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:41,431 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:41,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:25:41,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-26 19:25:41,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353825634] [2020-10-26 19:25:41,441 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:41,441 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:25:41,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258402155] [2020-10-26 19:25:41,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:25:41,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:41,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:25:41,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:41,448 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 6 states. [2020-10-26 19:25:41,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:41,734 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-10-26 19:25:41,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:25:41,735 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-26 19:25:41,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:41,736 INFO L225 Difference]: With dead ends: 81 [2020-10-26 19:25:41,737 INFO L226 Difference]: Without dead ends: 48 [2020-10-26 19:25:41,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:25:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-26 19:25:41,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-26 19:25:41,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:25:41,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-26 19:25:41,757 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2020-10-26 19:25:41,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:41,757 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-26 19:25:41,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:25:41,758 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-26 19:25:41,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-26 19:25:41,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:41,762 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:41,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:25:41,762 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:41,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:41,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1997413423, now seen corresponding path program 3 times [2020-10-26 19:25:41,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:41,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986018002] [2020-10-26 19:25:41,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:41,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:41,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:43,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:46,800 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-26 19:25:46,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:46,801 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-26 19:25:46,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-26 19:25:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:46,805 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-26 19:25:46,806 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:25:46,903 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:46,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:46,909 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:46,910 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:46,910 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:46,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:46,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:46,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:46,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:46,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:46,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:46,920 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-26 19:25:46,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986018002] [2020-10-26 19:25:46,921 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:46,921 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-26 19:25:46,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723295819] [2020-10-26 19:25:46,923 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-26 19:25:46,923 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:46,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-26 19:25:46,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:25:46,925 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-10-26 19:25:47,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:47,196 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-26 19:25:47,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:25:47,197 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-26 19:25:47,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:47,199 INFO L225 Difference]: With dead ends: 92 [2020-10-26 19:25:47,199 INFO L226 Difference]: Without dead ends: 54 [2020-10-26 19:25:47,200 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 19:25:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-26 19:25:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-26 19:25:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-26 19:25:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-26 19:25:47,209 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2020-10-26 19:25:47,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:47,209 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-26 19:25:47,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-26 19:25:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-26 19:25:47,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:25:47,211 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:47,214 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:47,214 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:25:47,214 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:47,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:47,215 INFO L82 PathProgramCache]: Analyzing trace with hash -1075963406, now seen corresponding path program 4 times [2020-10-26 19:25:47,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:47,216 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851733242] [2020-10-26 19:25:47,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:47,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:47,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:47,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:49,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,255 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:52,255 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:25:52,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:52,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:25:52,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-26 19:25:52,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:52,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-26 19:25:52,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:52,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:52,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:52,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:52,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:52,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:52,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:25:52,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:52,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:52,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-26 19:25:52,381 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851733242] [2020-10-26 19:25:52,381 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:52,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-26 19:25:52,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729549941] [2020-10-26 19:25:52,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-26 19:25:52,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:52,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-26 19:25:52,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:25:52,384 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 8 states. [2020-10-26 19:25:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:52,669 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-26 19:25:52,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-26 19:25:52,670 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-26 19:25:52,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:52,671 INFO L225 Difference]: With dead ends: 103 [2020-10-26 19:25:52,671 INFO L226 Difference]: Without dead ends: 60 [2020-10-26 19:25:52,672 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 19:25:52,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-26 19:25:52,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-26 19:25:52,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-26 19:25:52,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-26 19:25:52,681 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 49 [2020-10-26 19:25:52,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:52,682 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-26 19:25:52,682 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-26 19:25:52,682 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-26 19:25:52,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-26 19:25:52,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:52,689 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:52,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:25:52,690 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:52,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:52,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1984295567, now seen corresponding path program 5 times [2020-10-26 19:25:52,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:52,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [565250816] [2020-10-26 19:25:52,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:52,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:52,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:52,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:56,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:57,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-26 19:25:57,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:25:57,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:25:57,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:57,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-26 19:25:57,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:25:57,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-26 19:25:57,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:57,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:25:57,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:57,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:57,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:25:57,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:25:57,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:25:57,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:25:57,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:25:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:25:57,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:25:57,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:25:57,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:25:57,845 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-26 19:25:57,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [565250816] [2020-10-26 19:25:57,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:25:57,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-26 19:25:57,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118321128] [2020-10-26 19:25:57,847 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-26 19:25:57,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:25:57,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-26 19:25:57,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-26 19:25:57,848 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 9 states. [2020-10-26 19:25:58,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:25:58,038 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-10-26 19:25:58,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-26 19:25:58,040 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-26 19:25:58,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:25:58,041 INFO L225 Difference]: With dead ends: 114 [2020-10-26 19:25:58,041 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:25:58,044 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 19:25:58,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:25:58,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:25:58,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:25:58,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-10-26 19:25:58,058 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 55 [2020-10-26 19:25:58,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:25:58,058 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-10-26 19:25:58,058 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-26 19:25:58,058 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-10-26 19:25:58,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-26 19:25:58,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:25:58,062 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:25:58,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:25:58,062 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:25:58,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:25:58,063 INFO L82 PathProgramCache]: Analyzing trace with hash 1472739858, now seen corresponding path program 6 times [2020-10-26 19:25:58,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:25:58,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1937455027] [2020-10-26 19:25:58,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:25:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:25:58,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:25:58,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:03,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-26 19:26:03,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:03,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:26:03,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:03,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:26:03,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:03,096 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-26 19:26:03,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:03,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:03,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:03,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:03,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:03,216 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:03,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:03,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:03,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:03,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:03,223 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-26 19:26:03,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1937455027] [2020-10-26 19:26:03,224 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:03,224 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:26:03,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806571233] [2020-10-26 19:26:03,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:26:03,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:03,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:26:03,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:26:03,226 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 10 states. [2020-10-26 19:26:03,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:03,469 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-10-26 19:26:03,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-26 19:26:03,470 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-26 19:26:03,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:03,471 INFO L225 Difference]: With dead ends: 125 [2020-10-26 19:26:03,471 INFO L226 Difference]: Without dead ends: 72 [2020-10-26 19:26:03,472 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 19:26:03,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-26 19:26:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-26 19:26:03,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-26 19:26:03,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-26 19:26:03,481 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 61 [2020-10-26 19:26:03,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:03,481 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-26 19:26:03,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:26:03,482 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-26 19:26:03,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:26:03,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:03,483 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:03,483 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:26:03,483 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:03,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:03,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1747701999, now seen corresponding path program 7 times [2020-10-26 19:26:03,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:03,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630197170] [2020-10-26 19:26:03,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:03,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:03,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:03,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,509 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:26:08,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:08,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:08,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-26 19:26:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:08,510 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-26 19:26:08,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:08,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:08,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:08,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:08,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:08,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:08,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:08,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:08,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:08,653 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-26 19:26:08,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630197170] [2020-10-26 19:26:08,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:08,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-26 19:26:08,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503657213] [2020-10-26 19:26:08,655 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-26 19:26:08,655 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:08,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-26 19:26:08,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-26 19:26:08,656 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 11 states. [2020-10-26 19:26:08,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:08,933 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2020-10-26 19:26:08,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:26:08,933 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-26 19:26:08,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:08,935 INFO L225 Difference]: With dead ends: 136 [2020-10-26 19:26:08,935 INFO L226 Difference]: Without dead ends: 78 [2020-10-26 19:26:08,936 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 19:26:08,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-26 19:26:08,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-26 19:26:08,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-26 19:26:08,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-26 19:26:08,955 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 67 [2020-10-26 19:26:08,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:08,956 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-26 19:26:08,956 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-26 19:26:08,956 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-26 19:26:08,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-26 19:26:08,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:08,961 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:08,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:26:08,962 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:08,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:08,962 INFO L82 PathProgramCache]: Analyzing trace with hash -141651406, now seen corresponding path program 8 times [2020-10-26 19:26:08,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:08,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100751740] [2020-10-26 19:26:08,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:08,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:09,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:09,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:13,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:13,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-26 19:26:13,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:13,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:26:13,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:13,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:26:13,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-26 19:26:13,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:14,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:14,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,125 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:14,125 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:14,125 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:14,126 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:14,126 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:14,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:14,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:14,126 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:14,126 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:14,135 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-26 19:26:14,135 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100751740] [2020-10-26 19:26:14,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:14,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:26:14,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521365043] [2020-10-26 19:26:14,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:26:14,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:14,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:26:14,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:26:14,139 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 12 states. [2020-10-26 19:26:14,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:14,391 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-10-26 19:26:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:26:14,392 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-26 19:26:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:14,393 INFO L225 Difference]: With dead ends: 147 [2020-10-26 19:26:14,393 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:26:14,395 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 19:26:14,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:26:14,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-26 19:26:14,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:26:14,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-26 19:26:14,406 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 73 [2020-10-26 19:26:14,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:14,406 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-26 19:26:14,406 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:26:14,406 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-26 19:26:14,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-26 19:26:14,407 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:14,407 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:14,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:26:14,408 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:14,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:14,408 INFO L82 PathProgramCache]: Analyzing trace with hash -836651185, now seen corresponding path program 9 times [2020-10-26 19:26:14,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:14,409 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988113694] [2020-10-26 19:26:14,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:14,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:14,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:14,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-26 19:26:19,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:19,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:19,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-26 19:26:19,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:19,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-26 19:26:19,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:19,620 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:19,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:19,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:19,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:19,627 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:19,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:19,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:19,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:19,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:19,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:19,645 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-26 19:26:19,646 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988113694] [2020-10-26 19:26:19,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:19,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-26 19:26:19,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935061122] [2020-10-26 19:26:19,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-26 19:26:19,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:19,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-26 19:26:19,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-26 19:26:19,649 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 13 states. [2020-10-26 19:26:20,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:20,029 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2020-10-26 19:26:20,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-26 19:26:20,030 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-10-26 19:26:20,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:20,031 INFO L225 Difference]: With dead ends: 158 [2020-10-26 19:26:20,031 INFO L226 Difference]: Without dead ends: 90 [2020-10-26 19:26:20,033 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 19:26:20,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-26 19:26:20,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-26 19:26:20,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-26 19:26:20,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-26 19:26:20,052 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2020-10-26 19:26:20,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:20,052 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-26 19:26:20,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-26 19:26:20,053 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-26 19:26:20,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:26:20,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:20,064 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:20,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:26:20,065 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:20,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:20,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1670438318, now seen corresponding path program 10 times [2020-10-26 19:26:20,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:20,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668599543] [2020-10-26 19:26:20,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:20,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:20,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:20,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,108 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:25,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:26:25,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:25,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:26:25,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:26:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:25,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-26 19:26:25,109 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:25,296 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:25,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:25,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,304 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:25,304 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:25,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:25,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:25,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:25,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:25,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:25,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:25,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:26:25,324 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-26 19:26:25,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668599543] [2020-10-26 19:26:25,325 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:25,325 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:26:25,325 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916240453] [2020-10-26 19:26:25,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:26:25,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:25,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:26:25,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:26:25,327 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 14 states. [2020-10-26 19:26:25,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:25,648 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2020-10-26 19:26:25,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:26:25,649 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-10-26 19:26:25,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:25,650 INFO L225 Difference]: With dead ends: 169 [2020-10-26 19:26:25,650 INFO L226 Difference]: Without dead ends: 96 [2020-10-26 19:26:25,652 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 19:26:25,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-26 19:26:25,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-26 19:26:25,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-26 19:26:25,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-26 19:26:25,672 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 85 [2020-10-26 19:26:25,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:25,672 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-26 19:26:25,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:26:25,673 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-26 19:26:25,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-26 19:26:25,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:25,674 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:25,674 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:26:25,674 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:25,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:25,675 INFO L82 PathProgramCache]: Analyzing trace with hash 403285423, now seen corresponding path program 11 times [2020-10-26 19:26:25,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:25,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697135088] [2020-10-26 19:26:25,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:25,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:25,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:25,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:28,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,710 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-26 19:26:30,710 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:30,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:26:30,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-26 19:26:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:30,711 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-26 19:26:30,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:30,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:30,894 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:30,897 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:30,897 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:30,897 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:30,897 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:30,898 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:30,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:30,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:30,898 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:30,898 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:30,910 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-26 19:26:30,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697135088] [2020-10-26 19:26:30,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:30,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-26 19:26:30,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534878412] [2020-10-26 19:26:30,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-26 19:26:30,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:30,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-26 19:26:30,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:30,912 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 15 states. [2020-10-26 19:26:31,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:31,205 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2020-10-26 19:26:31,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-26 19:26:31,206 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 91 [2020-10-26 19:26:31,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:31,207 INFO L225 Difference]: With dead ends: 180 [2020-10-26 19:26:31,208 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:26:31,209 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-26 19:26:31,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:26:31,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:26:31,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:26:31,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2020-10-26 19:26:31,225 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 91 [2020-10-26 19:26:31,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:31,227 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2020-10-26 19:26:31,227 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-26 19:26:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2020-10-26 19:26:31,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-26 19:26:31,228 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:31,228 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:31,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:26:31,229 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:31,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:31,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1428679282, now seen corresponding path program 12 times [2020-10-26 19:26:31,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:31,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739735420] [2020-10-26 19:26:31,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:31,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:31,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:31,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:34,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-26 19:26:36,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:26:36,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:26:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:36,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-26 19:26:36,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:36,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:36,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:36,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:36,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:36,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:36,491 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:36,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:36,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:36,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:36,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:36,501 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-26 19:26:36,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739735420] [2020-10-26 19:26:36,501 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:36,501 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:26:36,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173060121] [2020-10-26 19:26:36,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:26:36,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:36,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:26:36,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:26:36,505 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand 16 states. [2020-10-26 19:26:36,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:36,796 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2020-10-26 19:26:36,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:26:36,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-26 19:26:36,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:36,800 INFO L225 Difference]: With dead ends: 191 [2020-10-26 19:26:36,800 INFO L226 Difference]: Without dead ends: 108 [2020-10-26 19:26:36,801 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 19:26:36,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-26 19:26:36,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-26 19:26:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-26 19:26:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2020-10-26 19:26:36,809 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 97 [2020-10-26 19:26:36,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:36,809 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2020-10-26 19:26:36,809 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-26 19:26:36,809 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2020-10-26 19:26:36,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-26 19:26:36,810 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:36,811 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:36,811 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:26:36,811 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:36,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:36,812 INFO L82 PathProgramCache]: Analyzing trace with hash -1002071025, now seen corresponding path program 13 times [2020-10-26 19:26:36,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:36,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866163545] [2020-10-26 19:26:36,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:36,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:36,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:36,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:37,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:40,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:41,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:41,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-26 19:26:41,854 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:41,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:26:41,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:41,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:26:41,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:41,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-26 19:26:41,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:42,076 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:42,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:42,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:42,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:42,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:42,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:26:42,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:42,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:42,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:42,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:42,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-10-26 19:26:42,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866163545] [2020-10-26 19:26:42,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:42,094 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:26:42,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393766052] [2020-10-26 19:26:42,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:26:42,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:42,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:26:42,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:42,096 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 17 states. [2020-10-26 19:26:42,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:42,404 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2020-10-26 19:26:42,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-26 19:26:42,405 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 103 [2020-10-26 19:26:42,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:42,406 INFO L225 Difference]: With dead ends: 202 [2020-10-26 19:26:42,406 INFO L226 Difference]: Without dead ends: 114 [2020-10-26 19:26:42,407 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:26:42,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-26 19:26:42,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-26 19:26:42,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-26 19:26:42,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2020-10-26 19:26:42,415 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 103 [2020-10-26 19:26:42,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:42,415 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2020-10-26 19:26:42,415 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:26:42,416 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2020-10-26 19:26:42,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:26:42,417 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:42,417 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:42,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:26:42,417 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:42,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:42,418 INFO L82 PathProgramCache]: Analyzing trace with hash 569830034, now seen corresponding path program 14 times [2020-10-26 19:26:42,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:42,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [571553641] [2020-10-26 19:26:42,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:42,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:42,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:42,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:26:47,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:26:47,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-26 19:26:47,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,466 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-26 19:26:47,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:47,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-26 19:26:47,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:47,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:47,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:47,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:47,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:47,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:47,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:26:47,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:47,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:47,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:47,739 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-26 19:26:47,740 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [571553641] [2020-10-26 19:26:47,741 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:47,741 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-26 19:26:47,741 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155705971] [2020-10-26 19:26:47,742 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-26 19:26:47,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:47,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-26 19:26:47,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-26 19:26:47,743 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand 18 states. [2020-10-26 19:26:48,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:48,096 INFO L93 Difference]: Finished difference Result 213 states and 230 transitions. [2020-10-26 19:26:48,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-26 19:26:48,097 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-10-26 19:26:48,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:48,098 INFO L225 Difference]: With dead ends: 213 [2020-10-26 19:26:48,098 INFO L226 Difference]: Without dead ends: 120 [2020-10-26 19:26:48,099 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 19:26:48,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-26 19:26:48,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-26 19:26:48,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:26:48,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2020-10-26 19:26:48,113 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 109 [2020-10-26 19:26:48,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:48,114 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2020-10-26 19:26:48,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-26 19:26:48,114 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2020-10-26 19:26:48,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-26 19:26:48,115 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:48,115 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:48,115 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-26 19:26:48,115 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:48,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:48,116 INFO L82 PathProgramCache]: Analyzing trace with hash 2142739055, now seen corresponding path program 15 times [2020-10-26 19:26:48,116 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:48,116 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1150234782] [2020-10-26 19:26:48,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:48,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:48,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:48,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:53,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:26:53,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-26 19:26:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:53,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-26 19:26:53,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:53,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:53,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:53,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:53,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:53,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:53,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:53,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:53,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:53,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:53,442 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-26 19:26:53,442 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1150234782] [2020-10-26 19:26:53,442 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:53,442 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-26 19:26:53,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717621637] [2020-10-26 19:26:53,443 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-26 19:26:53,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:53,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-26 19:26:53,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-26 19:26:53,445 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand 19 states. [2020-10-26 19:26:53,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:53,834 INFO L93 Difference]: Finished difference Result 224 states and 241 transitions. [2020-10-26 19:26:53,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-26 19:26:53,835 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 115 [2020-10-26 19:26:53,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:53,836 INFO L225 Difference]: With dead ends: 224 [2020-10-26 19:26:53,836 INFO L226 Difference]: Without dead ends: 126 [2020-10-26 19:26:53,837 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 19:26:53,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-26 19:26:53,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-26 19:26:53,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-26 19:26:53,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-26 19:26:53,853 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 115 [2020-10-26 19:26:53,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:53,853 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-26 19:26:53,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-26 19:26:53,853 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-26 19:26:53,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-26 19:26:53,855 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:53,855 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:53,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-26 19:26:53,856 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:53,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:53,856 INFO L82 PathProgramCache]: Analyzing trace with hash -728096078, now seen corresponding path program 16 times [2020-10-26 19:26:53,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:53,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1283362175] [2020-10-26 19:26:53,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:53,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:53,921 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:53,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:54,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:58,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:58,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-26 19:26:58,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:26:58,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:26:58,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-26 19:26:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:26:58,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:26:58,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:59,203 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:26:59,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:59,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:26:59,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:26:59,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:26:59,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:26:59,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:26:59,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:26:59,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:26:59,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:26:59,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:26:59,224 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-10-26 19:26:59,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1283362175] [2020-10-26 19:26:59,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:26:59,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-26 19:26:59,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565317270] [2020-10-26 19:26:59,226 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-26 19:26:59,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:26:59,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-26 19:26:59,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-26 19:26:59,227 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 20 states. [2020-10-26 19:26:59,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:26:59,658 INFO L93 Difference]: Finished difference Result 235 states and 252 transitions. [2020-10-26 19:26:59,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:26:59,659 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 121 [2020-10-26 19:26:59,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:26:59,661 INFO L225 Difference]: With dead ends: 235 [2020-10-26 19:26:59,661 INFO L226 Difference]: Without dead ends: 132 [2020-10-26 19:26:59,662 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 19:26:59,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-26 19:26:59,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-26 19:26:59,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-26 19:26:59,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2020-10-26 19:26:59,670 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 121 [2020-10-26 19:26:59,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:26:59,670 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2020-10-26 19:26:59,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-26 19:26:59,670 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2020-10-26 19:26:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-26 19:26:59,672 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:26:59,672 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:26:59,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-26 19:26:59,672 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:26:59,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:26:59,673 INFO L82 PathProgramCache]: Analyzing trace with hash 1170317519, now seen corresponding path program 17 times [2020-10-26 19:26:59,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:26:59,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706152073] [2020-10-26 19:26:59,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:26:59,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:26:59,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:26:59,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:04,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:04,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-26 19:27:04,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:04,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-26 19:27:04,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:04,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-26 19:27:04,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:04,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-26 19:27:04,732 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:05,042 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:05,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:05,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:05,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:05,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:05,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:05,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:05,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:05,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:05,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:05,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-26 19:27:05,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706152073] [2020-10-26 19:27:05,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:05,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-26 19:27:05,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523325512] [2020-10-26 19:27:05,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-26 19:27:05,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:05,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-26 19:27:05,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:27:05,063 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand 21 states. [2020-10-26 19:27:05,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:05,494 INFO L93 Difference]: Finished difference Result 246 states and 263 transitions. [2020-10-26 19:27:05,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-26 19:27:05,495 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 127 [2020-10-26 19:27:05,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:05,496 INFO L225 Difference]: With dead ends: 246 [2020-10-26 19:27:05,496 INFO L226 Difference]: Without dead ends: 138 [2020-10-26 19:27:05,498 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 19:27:05,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-26 19:27:05,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-26 19:27:05,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-26 19:27:05,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2020-10-26 19:27:05,507 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 127 [2020-10-26 19:27:05,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:05,507 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2020-10-26 19:27:05,507 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-26 19:27:05,507 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2020-10-26 19:27:05,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-26 19:27:05,509 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:05,509 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:05,509 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-26 19:27:05,509 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:05,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:05,510 INFO L82 PathProgramCache]: Analyzing trace with hash -263220526, now seen corresponding path program 18 times [2020-10-26 19:27:05,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:05,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [339583543] [2020-10-26 19:27:05,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:05,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,773 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:05,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:10,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:10,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-26 19:27:10,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:10,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:27:10,554 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:10,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-26 19:27:10,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:10,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-26 19:27:10,555 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:10,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:10,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:10,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:10,917 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:10,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:10,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:10,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:10,918 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:10,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:10,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:10,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:10,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:10,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-26 19:27:10,934 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [339583543] [2020-10-26 19:27:10,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:10,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-26 19:27:10,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357115482] [2020-10-26 19:27:10,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-26 19:27:10,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:10,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-26 19:27:10,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-26 19:27:10,937 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand 22 states. [2020-10-26 19:27:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:11,377 INFO L93 Difference]: Finished difference Result 257 states and 274 transitions. [2020-10-26 19:27:11,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-26 19:27:11,378 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 133 [2020-10-26 19:27:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:11,379 INFO L225 Difference]: With dead ends: 257 [2020-10-26 19:27:11,379 INFO L226 Difference]: Without dead ends: 144 [2020-10-26 19:27:11,380 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 19:27:11,380 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-26 19:27:11,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-26 19:27:11,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-26 19:27:11,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 150 transitions. [2020-10-26 19:27:11,388 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 150 transitions. Word has length 133 [2020-10-26 19:27:11,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:11,388 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 150 transitions. [2020-10-26 19:27:11,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-26 19:27:11,388 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 150 transitions. [2020-10-26 19:27:11,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-26 19:27:11,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:11,390 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:11,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-26 19:27:11,390 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:11,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:11,390 INFO L82 PathProgramCache]: Analyzing trace with hash -2142916817, now seen corresponding path program 19 times [2020-10-26 19:27:11,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:11,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1178943862] [2020-10-26 19:27:11,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:11,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:11,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:16,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-26 19:27:16,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:16,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:27:16,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:16,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-26 19:27:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:16,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-26 19:27:16,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:16,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:16,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:16,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:16,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:16,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:16,837 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:16,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:16,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:16,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:16,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:16,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-26 19:27:16,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1178943862] [2020-10-26 19:27:16,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:16,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-26 19:27:16,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722106168] [2020-10-26 19:27:16,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-26 19:27:16,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:16,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-26 19:27:16,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:27:16,852 INFO L87 Difference]: Start difference. First operand 144 states and 150 transitions. Second operand 23 states. [2020-10-26 19:27:17,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:17,365 INFO L93 Difference]: Finished difference Result 268 states and 285 transitions. [2020-10-26 19:27:17,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-26 19:27:17,365 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-10-26 19:27:17,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:17,367 INFO L225 Difference]: With dead ends: 268 [2020-10-26 19:27:17,368 INFO L226 Difference]: Without dead ends: 150 [2020-10-26 19:27:17,368 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 19:27:17,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-26 19:27:17,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-26 19:27:17,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-26 19:27:17,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 156 transitions. [2020-10-26 19:27:17,376 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 156 transitions. Word has length 139 [2020-10-26 19:27:17,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:17,377 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 156 transitions. [2020-10-26 19:27:17,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-26 19:27:17,377 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 156 transitions. [2020-10-26 19:27:17,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-26 19:27:17,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:17,378 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:17,378 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-26 19:27:17,378 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:17,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:17,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1982514446, now seen corresponding path program 20 times [2020-10-26 19:27:17,379 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:17,379 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1355118326] [2020-10-26 19:27:17,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:17,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:17,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:22,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:22,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-26 19:27:22,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:22,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:27:22,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:22,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-26 19:27:22,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:22,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:27:22,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:22,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:22,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:22,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:22,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:22,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:22,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:22,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:22,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:22,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:22,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:22,880 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-10-26 19:27:22,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1355118326] [2020-10-26 19:27:22,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:22,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-26 19:27:22,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804150319] [2020-10-26 19:27:22,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-26 19:27:22,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:22,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-26 19:27:22,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:22,883 INFO L87 Difference]: Start difference. First operand 150 states and 156 transitions. Second operand 24 states. [2020-10-26 19:27:23,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:23,341 INFO L93 Difference]: Finished difference Result 279 states and 296 transitions. [2020-10-26 19:27:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-26 19:27:23,342 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-10-26 19:27:23,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:23,344 INFO L225 Difference]: With dead ends: 279 [2020-10-26 19:27:23,344 INFO L226 Difference]: Without dead ends: 156 [2020-10-26 19:27:23,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-26 19:27:23,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-26 19:27:23,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-26 19:27:23,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-26 19:27:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2020-10-26 19:27:23,353 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 145 [2020-10-26 19:27:23,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:23,353 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2020-10-26 19:27:23,353 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-26 19:27:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2020-10-26 19:27:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-26 19:27:23,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:23,355 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:23,355 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-26 19:27:23,355 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:23,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash 665175439, now seen corresponding path program 21 times [2020-10-26 19:27:23,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:23,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171846101] [2020-10-26 19:27:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:23,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:23,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:23,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,409 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:28,410 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-26 19:27:28,410 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:28,410 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-26 19:27:28,410 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-26 19:27:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:28,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-26 19:27:28,410 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:28,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:28,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:28,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:28,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:28,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:28,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:28,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:28,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:28,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:28,888 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-26 19:27:28,888 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171846101] [2020-10-26 19:27:28,888 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:28,888 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-26 19:27:28,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497222124] [2020-10-26 19:27:28,889 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-26 19:27:28,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:28,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-26 19:27:28,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-26 19:27:28,890 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand 25 states. [2020-10-26 19:27:29,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:29,357 INFO L93 Difference]: Finished difference Result 290 states and 307 transitions. [2020-10-26 19:27:29,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-26 19:27:29,358 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 151 [2020-10-26 19:27:29,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:29,359 INFO L225 Difference]: With dead ends: 290 [2020-10-26 19:27:29,360 INFO L226 Difference]: Without dead ends: 162 [2020-10-26 19:27:29,360 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 19:27:29,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-26 19:27:29,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-26 19:27:29,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-26 19:27:29,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 168 transitions. [2020-10-26 19:27:29,369 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 168 transitions. Word has length 151 [2020-10-26 19:27:29,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:29,370 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 168 transitions. [2020-10-26 19:27:29,370 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-26 19:27:29,370 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 168 transitions. [2020-10-26 19:27:29,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-26 19:27:29,371 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:29,371 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:29,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-26 19:27:29,371 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:29,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:29,372 INFO L82 PathProgramCache]: Analyzing trace with hash 661199634, now seen corresponding path program 22 times [2020-10-26 19:27:29,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:29,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081449868] [2020-10-26 19:27:29,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:29,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:29,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:29,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,445 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:34,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-26 19:27:34,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:34,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:27:34,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-26 19:27:34,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:34,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:27:34,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:34,922 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:34,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:34,927 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:34,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:34,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:34,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:34,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:34,928 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:34,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:34,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-26 19:27:34,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081449868] [2020-10-26 19:27:34,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:34,943 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-26 19:27:34,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141267869] [2020-10-26 19:27:34,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-26 19:27:34,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:34,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-26 19:27:34,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:27:34,944 INFO L87 Difference]: Start difference. First operand 162 states and 168 transitions. Second operand 26 states. [2020-10-26 19:27:35,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:35,361 INFO L93 Difference]: Finished difference Result 301 states and 318 transitions. [2020-10-26 19:27:35,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-26 19:27:35,361 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-10-26 19:27:35,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:35,362 INFO L225 Difference]: With dead ends: 301 [2020-10-26 19:27:35,363 INFO L226 Difference]: Without dead ends: 168 [2020-10-26 19:27:35,364 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 19:27:35,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-26 19:27:35,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-26 19:27:35,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-26 19:27:35,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2020-10-26 19:27:35,384 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 157 [2020-10-26 19:27:35,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:35,387 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2020-10-26 19:27:35,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-26 19:27:35,388 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2020-10-26 19:27:35,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-26 19:27:35,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:35,390 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:35,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-26 19:27:35,390 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:35,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:35,391 INFO L82 PathProgramCache]: Analyzing trace with hash -490478609, now seen corresponding path program 23 times [2020-10-26 19:27:35,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:35,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375051739] [2020-10-26 19:27:35,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:35,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:35,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:35,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:40,474 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:40,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-26 19:27:40,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:40,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-26 19:27:40,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-26 19:27:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:40,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-26 19:27:40,475 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:41,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:41,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:41,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:41,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:41,009 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:41,009 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:27:41,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:41,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:41,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:41,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2020-10-26 19:27:41,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375051739] [2020-10-26 19:27:41,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:41,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-26 19:27:41,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044575836] [2020-10-26 19:27:41,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-26 19:27:41,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:41,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-26 19:27:41,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:41,027 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 27 states. [2020-10-26 19:27:41,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:41,584 INFO L93 Difference]: Finished difference Result 312 states and 329 transitions. [2020-10-26 19:27:41,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-26 19:27:41,584 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 163 [2020-10-26 19:27:41,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:41,586 INFO L225 Difference]: With dead ends: 312 [2020-10-26 19:27:41,586 INFO L226 Difference]: Without dead ends: 174 [2020-10-26 19:27:41,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-26 19:27:41,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-26 19:27:41,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-26 19:27:41,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-26 19:27:41,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2020-10-26 19:27:41,596 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 163 [2020-10-26 19:27:41,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:41,597 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2020-10-26 19:27:41,597 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-26 19:27:41,597 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2020-10-26 19:27:41,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-26 19:27:41,598 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:41,598 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:41,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-26 19:27:41,598 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:41,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:41,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1597426894, now seen corresponding path program 24 times [2020-10-26 19:27:41,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:41,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1949880840] [2020-10-26 19:27:41,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:41,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:41,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:41,915 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:42,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:42,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:46,680 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:46,680 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-26 19:27:46,680 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:46,680 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-26 19:27:46,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:46,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-26 19:27:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:46,681 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:27:46,681 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:47,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:47,211 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:47,213 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:47,214 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:47,214 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:47,214 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:47,214 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:47,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:47,215 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:47,215 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:47,239 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2020-10-26 19:27:47,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1949880840] [2020-10-26 19:27:47,240 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:47,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-26 19:27:47,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408341457] [2020-10-26 19:27:47,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-26 19:27:47,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:47,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-26 19:27:47,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-26 19:27:47,243 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand 28 states. [2020-10-26 19:27:47,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:47,827 INFO L93 Difference]: Finished difference Result 323 states and 340 transitions. [2020-10-26 19:27:47,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-26 19:27:47,828 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 169 [2020-10-26 19:27:47,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:47,830 INFO L225 Difference]: With dead ends: 323 [2020-10-26 19:27:47,830 INFO L226 Difference]: Without dead ends: 180 [2020-10-26 19:27:47,831 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 19:27:47,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-26 19:27:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-26 19:27:47,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-26 19:27:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2020-10-26 19:27:47,840 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 169 [2020-10-26 19:27:47,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:47,841 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2020-10-26 19:27:47,841 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-26 19:27:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2020-10-26 19:27:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-26 19:27:47,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:47,842 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:47,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-26 19:27:47,842 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash 654445135, now seen corresponding path program 25 times [2020-10-26 19:27:47,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:47,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [670459546] [2020-10-26 19:27:47,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:47,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:47,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:48,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:48,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:52,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:52,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-26 19:27:52,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:52,919 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-26 19:27:52,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-26 19:27:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:52,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-26 19:27:52,919 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:53,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:53,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:53,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:53,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:53,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:53,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:53,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2020-10-26 19:27:53,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [670459546] [2020-10-26 19:27:53,595 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:53,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-26 19:27:53,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255989026] [2020-10-26 19:27:53,596 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-26 19:27:53,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:53,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-26 19:27:53,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:53,598 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand 29 states. [2020-10-26 19:27:54,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:27:54,203 INFO L93 Difference]: Finished difference Result 334 states and 351 transitions. [2020-10-26 19:27:54,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-26 19:27:54,204 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 175 [2020-10-26 19:27:54,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:27:54,205 INFO L225 Difference]: With dead ends: 334 [2020-10-26 19:27:54,205 INFO L226 Difference]: Without dead ends: 186 [2020-10-26 19:27:54,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-26 19:27:54,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-26 19:27:54,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-26 19:27:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-26 19:27:54,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-10-26 19:27:54,219 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 175 [2020-10-26 19:27:54,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:27:54,219 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-10-26 19:27:54,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-26 19:27:54,219 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-10-26 19:27:54,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-26 19:27:54,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:27:54,221 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:27:54,221 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-26 19:27:54,221 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:27:54,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:27:54,225 INFO L82 PathProgramCache]: Analyzing trace with hash -13401262, now seen corresponding path program 26 times [2020-10-26 19:27:54,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:27:54,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [434542579] [2020-10-26 19:27:54,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:27:54,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:54,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:54,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:59,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:59,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-26 19:27:59,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:27:59,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-26 19:27:59,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-26 19:27:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:27:59,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:27:59,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:59,862 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:27:59,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:27:59,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:27:59,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:27:59,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:27:59,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:27:59,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:27:59,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:27:59,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:27:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:27:59,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:27:59,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:27:59,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2020-10-26 19:27:59,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [434542579] [2020-10-26 19:27:59,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:27:59,920 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-26 19:27:59,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845343160] [2020-10-26 19:27:59,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-26 19:27:59,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:27:59,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-26 19:27:59,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:27:59,921 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 30 states. [2020-10-26 19:28:00,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:00,553 INFO L93 Difference]: Finished difference Result 345 states and 362 transitions. [2020-10-26 19:28:00,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-26 19:28:00,553 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 181 [2020-10-26 19:28:00,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:00,555 INFO L225 Difference]: With dead ends: 345 [2020-10-26 19:28:00,555 INFO L226 Difference]: Without dead ends: 192 [2020-10-26 19:28:00,557 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-26 19:28:00,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-26 19:28:00,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-26 19:28:00,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-26 19:28:00,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 198 transitions. [2020-10-26 19:28:00,565 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 198 transitions. Word has length 181 [2020-10-26 19:28:00,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:00,566 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 198 transitions. [2020-10-26 19:28:00,566 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-26 19:28:00,566 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 198 transitions. [2020-10-26 19:28:00,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-26 19:28:00,567 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:00,567 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:00,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-26 19:28:00,568 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:00,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:00,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1480734895, now seen corresponding path program 27 times [2020-10-26 19:28:00,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:00,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1180686000] [2020-10-26 19:28:00,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:00,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:00,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:00,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:01,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:05,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:05,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-26 19:28:05,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:05,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-26 19:28:05,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:05,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-26 19:28:05,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:05,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-26 19:28:05,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:06,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:06,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:06,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:06,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:06,268 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:06,268 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:06,268 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:28:06,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:06,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:06,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:06,269 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:06,269 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:06,299 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-26 19:28:06,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1180686000] [2020-10-26 19:28:06,299 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:06,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-26 19:28:06,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300930544] [2020-10-26 19:28:06,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-26 19:28:06,300 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:06,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-26 19:28:06,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:06,303 INFO L87 Difference]: Start difference. First operand 192 states and 198 transitions. Second operand 31 states. [2020-10-26 19:28:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:06,799 INFO L93 Difference]: Finished difference Result 356 states and 373 transitions. [2020-10-26 19:28:06,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-26 19:28:06,799 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 187 [2020-10-26 19:28:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:06,800 INFO L225 Difference]: With dead ends: 356 [2020-10-26 19:28:06,801 INFO L226 Difference]: Without dead ends: 198 [2020-10-26 19:28:06,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-26 19:28:06,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-26 19:28:06,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-26 19:28:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-26 19:28:06,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 204 transitions. [2020-10-26 19:28:06,811 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 204 transitions. Word has length 187 [2020-10-26 19:28:06,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:06,811 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 204 transitions. [2020-10-26 19:28:06,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-26 19:28:06,811 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 204 transitions. [2020-10-26 19:28:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-26 19:28:06,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:06,814 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:06,814 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-26 19:28:06,814 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:06,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:06,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1566968690, now seen corresponding path program 28 times [2020-10-26 19:28:06,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:06,815 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089373138] [2020-10-26 19:28:06,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:06,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:06,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:07,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:11,934 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:11,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-26 19:28:11,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:11,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5050 [2020-10-26 19:28:11,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:11,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-26 19:28:11,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:11,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-26 19:28:11,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:12,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:12,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:12,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:12,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:12,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:12,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:12,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:28:12,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:12,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:12,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:12,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-26 19:28:12,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089373138] [2020-10-26 19:28:12,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:12,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-26 19:28:12,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401038868] [2020-10-26 19:28:12,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-26 19:28:12,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:12,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-26 19:28:12,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:12,684 INFO L87 Difference]: Start difference. First operand 198 states and 204 transitions. Second operand 32 states. [2020-10-26 19:28:13,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:13,319 INFO L93 Difference]: Finished difference Result 367 states and 384 transitions. [2020-10-26 19:28:13,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:28:13,320 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 193 [2020-10-26 19:28:13,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:13,321 INFO L225 Difference]: With dead ends: 367 [2020-10-26 19:28:13,322 INFO L226 Difference]: Without dead ends: 204 [2020-10-26 19:28:13,325 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-26 19:28:13,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-26 19:28:13,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-10-26 19:28:13,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-26 19:28:13,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 210 transitions. [2020-10-26 19:28:13,335 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 210 transitions. Word has length 193 [2020-10-26 19:28:13,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:13,335 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 210 transitions. [2020-10-26 19:28:13,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-26 19:28:13,335 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 210 transitions. [2020-10-26 19:28:13,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-26 19:28:13,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:13,337 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:13,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-26 19:28:13,337 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:13,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:13,337 INFO L82 PathProgramCache]: Analyzing trace with hash -387551473, now seen corresponding path program 29 times [2020-10-26 19:28:13,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:13,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375529859] [2020-10-26 19:28:13,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:13,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:13,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:13,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:13,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:18,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:18,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-26 19:28:18,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:18,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:28:18,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:18,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-26 19:28:18,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:18,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-26 19:28:18,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:19,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:19,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:19,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:19,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:19,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:19,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:19,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:19,164 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:19,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:19,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:19,189 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2020-10-26 19:28:19,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375529859] [2020-10-26 19:28:19,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:19,190 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-26 19:28:19,190 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933076438] [2020-10-26 19:28:19,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-26 19:28:19,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:19,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-26 19:28:19,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:19,192 INFO L87 Difference]: Start difference. First operand 204 states and 210 transitions. Second operand 33 states. [2020-10-26 19:28:19,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:19,781 INFO L93 Difference]: Finished difference Result 378 states and 395 transitions. [2020-10-26 19:28:19,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-26 19:28:19,782 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 199 [2020-10-26 19:28:19,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:19,783 INFO L225 Difference]: With dead ends: 378 [2020-10-26 19:28:19,783 INFO L226 Difference]: Without dead ends: 210 [2020-10-26 19:28:19,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-26 19:28:19,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-26 19:28:19,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2020-10-26 19:28:19,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-26 19:28:19,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 216 transitions. [2020-10-26 19:28:19,796 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 216 transitions. Word has length 199 [2020-10-26 19:28:19,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:19,797 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 216 transitions. [2020-10-26 19:28:19,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-26 19:28:19,797 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 216 transitions. [2020-10-26 19:28:19,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-26 19:28:19,798 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:19,799 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:19,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-26 19:28:19,799 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:19,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:19,799 INFO L82 PathProgramCache]: Analyzing trace with hash -945894510, now seen corresponding path program 30 times [2020-10-26 19:28:19,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:19,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661339021] [2020-10-26 19:28:19,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:19,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:19,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:20,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:20,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:20,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:24,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:24,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-26 19:28:24,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:24,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-26 19:28:24,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-26 19:28:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:24,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-26 19:28:24,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:25,703 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:25,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:25,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:25,707 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:25,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:25,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:25,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:25,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:25,708 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:25,708 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:25,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2020-10-26 19:28:25,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661339021] [2020-10-26 19:28:25,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:25,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-26 19:28:25,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487872440] [2020-10-26 19:28:25,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-26 19:28:25,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:25,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-26 19:28:25,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-26 19:28:25,733 INFO L87 Difference]: Start difference. First operand 210 states and 216 transitions. Second operand 34 states. [2020-10-26 19:28:26,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:26,496 INFO L93 Difference]: Finished difference Result 389 states and 406 transitions. [2020-10-26 19:28:26,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-26 19:28:26,497 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 205 [2020-10-26 19:28:26,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:26,499 INFO L225 Difference]: With dead ends: 389 [2020-10-26 19:28:26,499 INFO L226 Difference]: Without dead ends: 216 [2020-10-26 19:28:26,501 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 19:28:26,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-26 19:28:26,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-26 19:28:26,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-26 19:28:26,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 222 transitions. [2020-10-26 19:28:26,510 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 222 transitions. Word has length 205 [2020-10-26 19:28:26,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:26,510 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 222 transitions. [2020-10-26 19:28:26,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-26 19:28:26,510 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 222 transitions. [2020-10-26 19:28:26,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-26 19:28:26,511 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:26,512 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:26,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-26 19:28:26,512 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:26,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:26,513 INFO L82 PathProgramCache]: Analyzing trace with hash 2043719023, now seen corresponding path program 31 times [2020-10-26 19:28:26,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:26,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1837534098] [2020-10-26 19:28:26,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:26,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:26,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,014 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:27,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:31,585 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:31,585 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-26 19:28:31,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:31,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:28:31,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:31,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-26 19:28:31,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:31,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-26 19:28:31,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:32,428 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:32,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:32,433 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:32,433 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:32,433 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:32,434 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:32,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:32,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-10-26 19:28:32,459 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1837534098] [2020-10-26 19:28:32,459 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:32,459 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-26 19:28:32,459 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241092146] [2020-10-26 19:28:32,460 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-26 19:28:32,460 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:32,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-26 19:28:32,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-26 19:28:32,461 INFO L87 Difference]: Start difference. First operand 216 states and 222 transitions. Second operand 35 states. [2020-10-26 19:28:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:33,159 INFO L93 Difference]: Finished difference Result 400 states and 417 transitions. [2020-10-26 19:28:33,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-26 19:28:33,162 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 211 [2020-10-26 19:28:33,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:33,164 INFO L225 Difference]: With dead ends: 400 [2020-10-26 19:28:33,164 INFO L226 Difference]: Without dead ends: 222 [2020-10-26 19:28:33,165 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 19:28:33,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-26 19:28:33,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2020-10-26 19:28:33,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-26 19:28:33,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 228 transitions. [2020-10-26 19:28:33,173 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 228 transitions. Word has length 211 [2020-10-26 19:28:33,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:33,174 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 228 transitions. [2020-10-26 19:28:33,174 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-26 19:28:33,174 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 228 transitions. [2020-10-26 19:28:33,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-26 19:28:33,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:33,176 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:33,176 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-26 19:28:33,176 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:33,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:33,176 INFO L82 PathProgramCache]: Analyzing trace with hash 463193010, now seen corresponding path program 32 times [2020-10-26 19:28:33,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:33,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1097752646] [2020-10-26 19:28:33,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:33,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:33,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:33,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:33,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:38,279 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:38,279 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-26 19:28:38,279 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:38,279 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:28:38,279 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:38,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-26 19:28:38,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:38,280 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:28:38,280 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:39,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:39,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:39,182 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:39,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:39,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:39,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:28:39,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:39,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:39,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:39,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:39,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:39,207 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-26 19:28:39,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1097752646] [2020-10-26 19:28:39,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:39,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-26 19:28:39,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896700697] [2020-10-26 19:28:39,208 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-26 19:28:39,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:39,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-26 19:28:39,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-26 19:28:39,209 INFO L87 Difference]: Start difference. First operand 222 states and 228 transitions. Second operand 36 states. [2020-10-26 19:28:40,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:40,024 INFO L93 Difference]: Finished difference Result 411 states and 428 transitions. [2020-10-26 19:28:40,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-26 19:28:40,025 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 217 [2020-10-26 19:28:40,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:40,027 INFO L225 Difference]: With dead ends: 411 [2020-10-26 19:28:40,027 INFO L226 Difference]: Without dead ends: 228 [2020-10-26 19:28:40,029 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 19:28:40,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-26 19:28:40,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-26 19:28:40,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-26 19:28:40,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 234 transitions. [2020-10-26 19:28:40,038 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 234 transitions. Word has length 217 [2020-10-26 19:28:40,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:40,038 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 234 transitions. [2020-10-26 19:28:40,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-26 19:28:40,038 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 234 transitions. [2020-10-26 19:28:40,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-26 19:28:40,040 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:40,040 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:40,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-26 19:28:40,040 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:40,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:40,041 INFO L82 PathProgramCache]: Analyzing trace with hash -94178353, now seen corresponding path program 33 times [2020-10-26 19:28:40,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:40,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038033487] [2020-10-26 19:28:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:40,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:40,358 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:40,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:40,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:45,112 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:45,112 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-26 19:28:45,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:45,113 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:28:45,113 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:45,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-26 19:28:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:45,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-26 19:28:45,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:28:46,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:46,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:46,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:46,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:46,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:46,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:46,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:46,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:46,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:46,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:46,108 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2020-10-26 19:28:46,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038033487] [2020-10-26 19:28:46,109 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:46,109 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-26 19:28:46,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435280913] [2020-10-26 19:28:46,110 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-26 19:28:46,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:46,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-26 19:28:46,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-26 19:28:46,111 INFO L87 Difference]: Start difference. First operand 228 states and 234 transitions. Second operand 37 states. [2020-10-26 19:28:46,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:46,941 INFO L93 Difference]: Finished difference Result 422 states and 439 transitions. [2020-10-26 19:28:46,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:28:46,942 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 223 [2020-10-26 19:28:46,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:46,944 INFO L225 Difference]: With dead ends: 422 [2020-10-26 19:28:46,944 INFO L226 Difference]: Without dead ends: 234 [2020-10-26 19:28:46,945 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 19:28:46,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-26 19:28:46,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-10-26 19:28:46,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-26 19:28:46,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 240 transitions. [2020-10-26 19:28:46,953 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 240 transitions. Word has length 223 [2020-10-26 19:28:46,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:46,953 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 240 transitions. [2020-10-26 19:28:46,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-26 19:28:46,954 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 240 transitions. [2020-10-26 19:28:46,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-26 19:28:46,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:46,955 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:46,955 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-26 19:28:46,955 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:46,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:46,956 INFO L82 PathProgramCache]: Analyzing trace with hash -392498222, now seen corresponding path program 34 times [2020-10-26 19:28:46,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:46,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1931088207] [2020-10-26 19:28:46,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:47,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:47,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:47,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:52,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:52,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-26 19:28:52,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-26 19:28:52,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-26 19:28:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:52,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-26 19:28:52,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:52,996 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:52,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:52,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:53,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:53,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:53,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:53,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:53,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:53,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:53,001 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2975 trivial. 0 not checked. [2020-10-26 19:28:53,028 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1931088207] [2020-10-26 19:28:53,028 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:53,028 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:28:53,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [370257009] [2020-10-26 19:28:53,029 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:28:53,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:53,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:28:53,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:28:53,031 INFO L87 Difference]: Start difference. First operand 234 states and 240 transitions. Second operand 38 states. [2020-10-26 19:28:53,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:28:53,710 INFO L93 Difference]: Finished difference Result 433 states and 450 transitions. [2020-10-26 19:28:53,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-26 19:28:53,710 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 229 [2020-10-26 19:28:53,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:28:53,713 INFO L225 Difference]: With dead ends: 433 [2020-10-26 19:28:53,713 INFO L226 Difference]: Without dead ends: 240 [2020-10-26 19:28:53,714 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 19:28:53,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-26 19:28:53,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-10-26 19:28:53,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-26 19:28:53,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 246 transitions. [2020-10-26 19:28:53,723 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 246 transitions. Word has length 229 [2020-10-26 19:28:53,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:28:53,724 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 246 transitions. [2020-10-26 19:28:53,724 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:28:53,724 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 246 transitions. [2020-10-26 19:28:53,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-26 19:28:53,725 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:28:53,725 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:28:53,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-26 19:28:53,726 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:28:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:28:53,726 INFO L82 PathProgramCache]: Analyzing trace with hash -931184081, now seen corresponding path program 35 times [2020-10-26 19:28:53,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:28:53,727 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [942583405] [2020-10-26 19:28:53,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:28:53,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:53,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:54,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:54,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:54,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:58,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:58,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-26 19:28:58,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:28:58,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-26 19:28:58,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:58,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-26 19:28:58,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:28:58,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-26 19:28:58,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:59,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:28:59,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:28:59,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:28:59,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:28:59,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:28:59,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:28:59,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:28:59,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:28:59,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:28:59,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:28:59,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:28:59,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:28:59,873 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3150 trivial. 0 not checked. [2020-10-26 19:28:59,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [942583405] [2020-10-26 19:28:59,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:28:59,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-26 19:28:59,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938281117] [2020-10-26 19:28:59,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-26 19:28:59,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:28:59,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-26 19:28:59,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:28:59,875 INFO L87 Difference]: Start difference. First operand 240 states and 246 transitions. Second operand 39 states. [2020-10-26 19:29:00,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:00,532 INFO L93 Difference]: Finished difference Result 444 states and 461 transitions. [2020-10-26 19:29:00,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-26 19:29:00,532 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 235 [2020-10-26 19:29:00,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:00,534 INFO L225 Difference]: With dead ends: 444 [2020-10-26 19:29:00,534 INFO L226 Difference]: Without dead ends: 246 [2020-10-26 19:29:00,536 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-26 19:29:00,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-26 19:29:00,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2020-10-26 19:29:00,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 246 states. [2020-10-26 19:29:00,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 252 transitions. [2020-10-26 19:29:00,545 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 252 transitions. Word has length 235 [2020-10-26 19:29:00,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:00,545 INFO L481 AbstractCegarLoop]: Abstraction has 246 states and 252 transitions. [2020-10-26 19:29:00,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-26 19:29:00,545 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 252 transitions. [2020-10-26 19:29:00,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2020-10-26 19:29:00,547 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:00,547 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:00,547 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-26 19:29:00,547 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:00,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:00,548 INFO L82 PathProgramCache]: Analyzing trace with hash 1331321842, now seen corresponding path program 36 times [2020-10-26 19:29:00,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:00,548 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1738555812] [2020-10-26 19:29:00,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:00,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:00,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:01,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:05,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:05,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 251 [2020-10-26 19:29:05,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:05,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5037 [2020-10-26 19:29:05,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:05,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-26 19:29:05,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:05,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-26 19:29:05,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:06,746 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:06,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:06,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:06,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:06,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:06,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:06,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:06,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:06,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:06,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:06,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:06,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3996 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 3330 trivial. 0 not checked. [2020-10-26 19:29:06,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1738555812] [2020-10-26 19:29:06,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:06,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-26 19:29:06,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698855770] [2020-10-26 19:29:06,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-26 19:29:06,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:06,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-26 19:29:06,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-26 19:29:06,785 INFO L87 Difference]: Start difference. First operand 246 states and 252 transitions. Second operand 40 states. [2020-10-26 19:29:07,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:07,653 INFO L93 Difference]: Finished difference Result 455 states and 472 transitions. [2020-10-26 19:29:07,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-26 19:29:07,654 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 241 [2020-10-26 19:29:07,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:07,655 INFO L225 Difference]: With dead ends: 455 [2020-10-26 19:29:07,656 INFO L226 Difference]: Without dead ends: 252 [2020-10-26 19:29:07,657 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 19:29:07,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-26 19:29:07,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 252. [2020-10-26 19:29:07,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 252 states. [2020-10-26 19:29:07,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 258 transitions. [2020-10-26 19:29:07,665 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 258 transitions. Word has length 241 [2020-10-26 19:29:07,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:07,666 INFO L481 AbstractCegarLoop]: Abstraction has 252 states and 258 transitions. [2020-10-26 19:29:07,666 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-26 19:29:07,666 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 258 transitions. [2020-10-26 19:29:07,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2020-10-26 19:29:07,667 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:07,668 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:07,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-26 19:29:07,668 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:07,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:07,668 INFO L82 PathProgramCache]: Analyzing trace with hash -796419953, now seen corresponding path program 37 times [2020-10-26 19:29:07,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:07,669 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1036655719] [2020-10-26 19:29:07,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:07,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:07,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:08,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:08,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:08,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:12,820 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:12,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-26 19:29:12,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:12,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5059 [2020-10-26 19:29:12,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:12,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-26 19:29:12,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:12,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-26 19:29:12,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:13,986 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:13,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:13,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:13,992 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:13,992 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:13,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:13,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:29:13,993 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:13,993 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:13,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4218 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 3515 trivial. 0 not checked. [2020-10-26 19:29:14,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1036655719] [2020-10-26 19:29:14,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:14,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-26 19:29:14,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669095308] [2020-10-26 19:29:14,023 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-26 19:29:14,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:14,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-26 19:29:14,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-26 19:29:14,025 INFO L87 Difference]: Start difference. First operand 252 states and 258 transitions. Second operand 41 states. [2020-10-26 19:29:14,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:14,910 INFO L93 Difference]: Finished difference Result 466 states and 483 transitions. [2020-10-26 19:29:14,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-26 19:29:14,911 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 247 [2020-10-26 19:29:14,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:14,913 INFO L225 Difference]: With dead ends: 466 [2020-10-26 19:29:14,913 INFO L226 Difference]: Without dead ends: 258 [2020-10-26 19:29:14,915 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 19:29:14,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2020-10-26 19:29:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 258. [2020-10-26 19:29:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 258 states. [2020-10-26 19:29:14,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 264 transitions. [2020-10-26 19:29:14,923 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 264 transitions. Word has length 247 [2020-10-26 19:29:14,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:14,924 INFO L481 AbstractCegarLoop]: Abstraction has 258 states and 264 transitions. [2020-10-26 19:29:14,924 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-26 19:29:14,924 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 264 transitions. [2020-10-26 19:29:14,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2020-10-26 19:29:14,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:14,925 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:14,926 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-26 19:29:14,926 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:14,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:14,926 INFO L82 PathProgramCache]: Analyzing trace with hash -501744622, now seen corresponding path program 38 times [2020-10-26 19:29:14,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:14,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564605025] [2020-10-26 19:29:14,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:15,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:15,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:15,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:15,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:20,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:20,006 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 263 [2020-10-26 19:29:20,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:29:20,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-26 19:29:20,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:20,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-26 19:29:20,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-26 19:29:20,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-26 19:29:20,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:21,248 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:29:21,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:21,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:21,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:29:21,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:29:21,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:29:21,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-26 19:29:21,252 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:29:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:29:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:29:21,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:29:21,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:29:21,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4446 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 3705 trivial. 0 not checked. [2020-10-26 19:29:21,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564605025] [2020-10-26 19:29:21,286 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:29:21,286 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-26 19:29:21,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141509086] [2020-10-26 19:29:21,287 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-26 19:29:21,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:29:21,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-26 19:29:21,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-26 19:29:21,288 INFO L87 Difference]: Start difference. First operand 258 states and 264 transitions. Second operand 42 states. [2020-10-26 19:29:22,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:29:22,178 INFO L93 Difference]: Finished difference Result 477 states and 494 transitions. [2020-10-26 19:29:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-26 19:29:22,178 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 253 [2020-10-26 19:29:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:29:22,180 INFO L225 Difference]: With dead ends: 477 [2020-10-26 19:29:22,181 INFO L226 Difference]: Without dead ends: 264 [2020-10-26 19:29:22,183 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 19:29:22,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-26 19:29:22,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2020-10-26 19:29:22,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 264 states. [2020-10-26 19:29:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 270 transitions. [2020-10-26 19:29:22,192 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 270 transitions. Word has length 253 [2020-10-26 19:29:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:29:22,192 INFO L481 AbstractCegarLoop]: Abstraction has 264 states and 270 transitions. [2020-10-26 19:29:22,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-26 19:29:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 270 transitions. [2020-10-26 19:29:22,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2020-10-26 19:29:22,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:29:22,194 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:29:22,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-26 19:29:22,194 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:29:22,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:29:22,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1386350865, now seen corresponding path program 39 times [2020-10-26 19:29:22,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:29:22,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1797133754] [2020-10-26 19:29:22,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:29:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:29:22,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:22,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:22,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:29:23,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking...