/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/loop-new/count_by_k.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 15:04:21,831 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 15:04:21,834 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 15:04:21,890 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 15:04:21,891 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 15:04:21,899 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 15:04:21,901 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 15:04:21,907 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 15:04:21,911 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 15:04:21,918 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 15:04:21,919 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 15:04:21,921 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 15:04:21,922 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 15:04:21,923 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 15:04:21,925 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 15:04:21,926 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 15:04:21,927 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 15:04:21,929 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 15:04:21,931 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 15:04:21,933 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 15:04:21,938 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 15:04:21,942 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 15:04:21,946 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 15:04:21,947 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 15:04:21,962 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 15:04:21,963 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 15:04:21,963 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 15:04:21,965 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 15:04:21,965 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 15:04:21,966 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 15:04:21,967 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 15:04:21,968 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 15:04:21,969 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 15:04:21,970 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 15:04:21,972 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 15:04:21,972 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 15:04:21,973 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 15:04:21,973 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 15:04:21,974 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 15:04:21,975 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 15:04:21,976 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 15:04:21,977 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 15:04:22,012 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 15:04:22,013 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 15:04:22,015 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 15:04:22,016 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 15:04:22,017 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 15:04:22,017 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 15:04:22,017 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 15:04:22,017 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 15:04:22,018 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 15:04:22,018 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 15:04:22,019 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 15:04:22,019 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 15:04:22,020 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 15:04:22,020 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 15:04:22,020 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 15:04:22,021 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 15:04:22,021 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 15:04:22,021 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 15:04:22,021 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 15:04:22,021 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 15:04:22,022 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 15:04:22,022 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:04:22,023 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 15:04:22,023 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 15:04:22,023 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 15:04:22,024 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 15:04:22,024 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 15:04:22,024 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 15:04:22,024 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 15:04:22,024 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 15:04:22,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 15:04:22,559 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 15:04:22,562 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 15:04:22,564 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 15:04:22,565 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 15:04:22,566 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_k.i [2020-10-28 15:04:22,662 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e312f5972/5aec0f08f2d745a39a657b76f1561d28/FLAG00cf3367a [2020-10-28 15:04:23,270 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 15:04:23,271 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_k.i [2020-10-28 15:04:23,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e312f5972/5aec0f08f2d745a39a657b76f1561d28/FLAG00cf3367a [2020-10-28 15:04:23,645 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/e312f5972/5aec0f08f2d745a39a657b76f1561d28 [2020-10-28 15:04:23,648 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 15:04:23,655 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 15:04:23,657 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 15:04:23,657 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 15:04:23,662 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 15:04:23,663 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@108cd507 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23, skipping insertion in model container [2020-10-28 15:04:23,667 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 15:04:23,692 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 15:04:23,855 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:04:23,867 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 15:04:23,885 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 15:04:23,903 INFO L208 MainTranslator]: Completed translation [2020-10-28 15:04:23,904 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23 WrapperNode [2020-10-28 15:04:23,904 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 15:04:23,905 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 15:04:23,906 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 15:04:23,906 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 15:04:23,920 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,920 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,929 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,929 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,935 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,940 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,942 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (1/1) ... [2020-10-28 15:04:23,944 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 15:04:23,945 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 15:04:23,946 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 15:04:23,946 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 15:04:23,947 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 15:04:24,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 15:04:24,035 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 15:04:24,035 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 15:04:24,036 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 15:04:24,036 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 15:04:24,036 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 15:04:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 15:04:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 15:04:24,036 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 15:04:24,037 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 15:04:24,037 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 15:04:24,037 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 15:04:24,037 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 15:04:24,037 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 15:04:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 15:04:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 15:04:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 15:04:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 15:04:24,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 15:04:24,039 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 15:04:24,039 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 15:04:24,039 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 15:04:24,286 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 15:04:24,286 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-28 15:04:24,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:04:24 BoogieIcfgContainer [2020-10-28 15:04:24,289 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 15:04:24,290 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 15:04:24,291 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 15:04:24,295 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 15:04:24,295 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 03:04:23" (1/3) ... [2020-10-28 15:04:24,296 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21147463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:04:24, skipping insertion in model container [2020-10-28 15:04:24,296 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 03:04:23" (2/3) ... [2020-10-28 15:04:24,297 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21147463 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 03:04:24, skipping insertion in model container [2020-10-28 15:04:24,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 03:04:24" (3/3) ... [2020-10-28 15:04:24,299 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_k.i [2020-10-28 15:04:24,313 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 15:04:24,318 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 15:04:24,351 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 15:04:24,412 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 15:04:24,412 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 15:04:24,413 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 15:04:24,413 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 15:04:24,416 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 15:04:24,416 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 15:04:24,416 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 15:04:24,417 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 15:04:24,456 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states. [2020-10-28 15:04:24,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:04:24,464 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:24,465 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:24,465 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:24,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:24,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1673345896, now seen corresponding path program 1 times [2020-10-28 15:04:24,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:24,484 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999389958] [2020-10-28 15:04:24,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:24,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:24,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:24,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:24,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:04:24,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:24,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-28 15:04:24,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:24,756 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:24,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:24,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 15:04:24,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:24,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 15:04:24,838 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:24,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:24,859 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:24,859 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:24,860 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:24,860 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 15:04:24,860 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:24,860 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:24,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:24,861 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:24,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999389958] [2020-10-28 15:04:24,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:04:24,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 15:04:24,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934151097] [2020-10-28 15:04:24,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 15:04:24,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:24,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 15:04:24,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:04:24,906 INFO L87 Difference]: Start difference. First operand 26 states. Second operand 3 states. [2020-10-28 15:04:24,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:24,984 INFO L93 Difference]: Finished difference Result 40 states and 47 transitions. [2020-10-28 15:04:24,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 15:04:24,986 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 14 [2020-10-28 15:04:24,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:24,996 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:04:24,996 INFO L226 Difference]: Without dead ends: 16 [2020-10-28 15:04:25,000 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 15:04:25,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2020-10-28 15:04:25,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2020-10-28 15:04:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-10-28 15:04:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-10-28 15:04:25,046 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2020-10-28 15:04:25,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:25,047 INFO L481 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-10-28 15:04:25,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 15:04:25,047 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-10-28 15:04:25,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 15:04:25,048 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:25,048 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:25,049 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 15:04:25,049 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:25,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:25,050 INFO L82 PathProgramCache]: Analyzing trace with hash 643291106, now seen corresponding path program 1 times [2020-10-28 15:04:25,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:25,051 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [811245815] [2020-10-28 15:04:25,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:25,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:25,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:25,286 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:25,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 15:04:25,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:25,287 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-28 15:04:25,287 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:25,288 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:25,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 15:04:25,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:25,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 15:04:25,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:25,417 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:25,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:25,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:25,432 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:25,432 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:25,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:25,433 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-28 15:04:25,433 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:25,433 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:25,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:25,434 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:25,434 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:25,443 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:25,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [811245815] [2020-10-28 15:04:25,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 15:04:25,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 15:04:25,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148157524] [2020-10-28 15:04:25,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 15:04:25,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:25,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 15:04:25,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 15:04:25,448 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 7 states. [2020-10-28 15:04:25,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:25,664 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2020-10-28 15:04:25,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 15:04:25,665 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 14 [2020-10-28 15:04:25,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:25,666 INFO L225 Difference]: With dead ends: 24 [2020-10-28 15:04:25,666 INFO L226 Difference]: Without dead ends: 17 [2020-10-28 15:04:25,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:04:25,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2020-10-28 15:04:25,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2020-10-28 15:04:25,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2020-10-28 15:04:25,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2020-10-28 15:04:25,676 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2020-10-28 15:04:25,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:25,677 INFO L481 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2020-10-28 15:04:25,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 15:04:25,677 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2020-10-28 15:04:25,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 15:04:25,678 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:25,678 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:25,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 15:04:25,679 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:25,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:25,680 INFO L82 PathProgramCache]: Analyzing trace with hash -2122930880, now seen corresponding path program 1 times [2020-10-28 15:04:25,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:25,680 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [751088338] [2020-10-28 15:04:25,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:25,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:25,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:25,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:26,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:26,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-10-28 15:04:26,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 15:04:26,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 370 [2020-10-28 15:04:26,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:26,070 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:26,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 15:04:26,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:26,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 15:04:26,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:04:26,221 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:26,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:26,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:26,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:26,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:26,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:26,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-28 15:04:26,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:26,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:26,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:26,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:26,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:26,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:26,264 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:26,264 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [751088338] [2020-10-28 15:04:26,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:26,265 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 15:04:26,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901260821] [2020-10-28 15:04:26,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 15:04:26,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:26,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 15:04:26,270 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 15:04:26,271 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand 8 states. [2020-10-28 15:04:26,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:26,508 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2020-10-28 15:04:26,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 15:04:26,509 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 16 [2020-10-28 15:04:26,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:26,510 INFO L225 Difference]: With dead ends: 26 [2020-10-28 15:04:26,510 INFO L226 Difference]: Without dead ends: 19 [2020-10-28 15:04:26,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:04:26,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2020-10-28 15:04:26,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2020-10-28 15:04:26,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2020-10-28 15:04:26,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2020-10-28 15:04:26,518 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2020-10-28 15:04:26,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:26,518 INFO L481 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2020-10-28 15:04:26,519 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 15:04:26,519 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2020-10-28 15:04:26,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-28 15:04:26,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:26,520 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:26,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 15:04:26,520 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:26,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:26,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1877503202, now seen corresponding path program 2 times [2020-10-28 15:04:26,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:26,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1536994209] [2020-10-28 15:04:26,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:26,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:26,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:26,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:26,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:26,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:26,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-28 15:04:26,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 15:04:26,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 348 [2020-10-28 15:04:26,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:26,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:26,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 15:04:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:26,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 15:04:26,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:27,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:27,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:27,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:27,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:27,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:27,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:27,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:04:27,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:27,034 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:27,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:27,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:27,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:27,035 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:27,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:27,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1536994209] [2020-10-28 15:04:27,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:27,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 15:04:27,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937587625] [2020-10-28 15:04:27,048 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 15:04:27,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:27,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 15:04:27,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 15:04:27,050 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand 9 states. [2020-10-28 15:04:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:27,379 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2020-10-28 15:04:27,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 15:04:27,381 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 18 [2020-10-28 15:04:27,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:27,383 INFO L225 Difference]: With dead ends: 28 [2020-10-28 15:04:27,383 INFO L226 Difference]: Without dead ends: 21 [2020-10-28 15:04:27,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:04:27,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2020-10-28 15:04:27,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2020-10-28 15:04:27,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2020-10-28 15:04:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2020-10-28 15:04:27,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2020-10-28 15:04:27,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:27,396 INFO L481 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2020-10-28 15:04:27,396 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 15:04:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2020-10-28 15:04:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-28 15:04:27,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:27,398 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:27,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 15:04:27,398 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:27,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:27,400 INFO L82 PathProgramCache]: Analyzing trace with hash 2050261372, now seen corresponding path program 3 times [2020-10-28 15:04:27,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:27,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [194407850] [2020-10-28 15:04:27,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:27,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:27,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:27,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:27,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:27,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:27,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 15:04:27,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 15:04:27,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-28 15:04:27,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:27,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 15:04:27,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:27,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 15:04:27,770 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:27,912 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:27,916 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:27,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:27,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:27,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:27,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 15:04:27,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:27,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:27,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:27,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:27,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:27,923 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:27,929 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:27,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [194407850] [2020-10-28 15:04:27,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:27,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 15:04:27,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88618420] [2020-10-28 15:04:27,931 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 15:04:27,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:27,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 15:04:27,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 15:04:27,932 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand 10 states. [2020-10-28 15:04:28,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:28,298 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2020-10-28 15:04:28,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 15:04:28,298 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 20 [2020-10-28 15:04:28,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:28,299 INFO L225 Difference]: With dead ends: 30 [2020-10-28 15:04:28,300 INFO L226 Difference]: Without dead ends: 23 [2020-10-28 15:04:28,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:04:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2020-10-28 15:04:28,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2020-10-28 15:04:28,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2020-10-28 15:04:28,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2020-10-28 15:04:28,307 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2020-10-28 15:04:28,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:28,307 INFO L481 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2020-10-28 15:04:28,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 15:04:28,308 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2020-10-28 15:04:28,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 15:04:28,308 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:28,309 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:28,309 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 15:04:28,309 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:28,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:28,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1355763802, now seen corresponding path program 4 times [2020-10-28 15:04:28,310 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:28,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [9047438] [2020-10-28 15:04:28,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:28,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:28,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:28,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:28,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:28,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:28,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:28,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:28,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 15:04:28,718 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 15:04:28,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 396 [2020-10-28 15:04:28,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:28,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 15:04:28,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:28,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 15:04:28,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:28,860 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:28,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:28,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:28,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:28,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:28,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:28,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:28,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:28,868 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:28,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:28,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:28,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:28,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:28,873 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:28,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [9047438] [2020-10-28 15:04:28,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:28,874 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 15:04:28,874 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482135380] [2020-10-28 15:04:28,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 15:04:28,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:28,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 15:04:28,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-28 15:04:28,876 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand 11 states. [2020-10-28 15:04:29,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:29,327 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2020-10-28 15:04:29,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 15:04:29,328 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 22 [2020-10-28 15:04:29,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:29,329 INFO L225 Difference]: With dead ends: 32 [2020-10-28 15:04:29,329 INFO L226 Difference]: Without dead ends: 25 [2020-10-28 15:04:29,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:04:29,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2020-10-28 15:04:29,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2020-10-28 15:04:29,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2020-10-28 15:04:29,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2020-10-28 15:04:29,336 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2020-10-28 15:04:29,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:29,336 INFO L481 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2020-10-28 15:04:29,336 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 15:04:29,337 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2020-10-28 15:04:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 15:04:29,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:29,338 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:29,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 15:04:29,338 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:29,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:29,339 INFO L82 PathProgramCache]: Analyzing trace with hash -336470088, now seen corresponding path program 5 times [2020-10-28 15:04:29,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:29,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1709670335] [2020-10-28 15:04:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:29,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:29,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:29,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:29,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:29,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:29,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:29,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:29,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:29,822 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 15:04:29,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 15:04:29,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 471 [2020-10-28 15:04:29,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:29,823 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 15:04:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:29,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 15:04:29,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:29,979 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:29,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:29,986 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:29,986 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:29,986 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:29,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:04:29,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:29,987 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:29,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:29,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:29,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:29,992 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:29,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1709670335] [2020-10-28 15:04:29,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:29,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 15:04:29,993 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876923731] [2020-10-28 15:04:29,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 15:04:29,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:29,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 15:04:29,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-28 15:04:29,995 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand 12 states. [2020-10-28 15:04:30,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:30,569 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2020-10-28 15:04:30,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 15:04:30,571 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 24 [2020-10-28 15:04:30,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:30,572 INFO L225 Difference]: With dead ends: 34 [2020-10-28 15:04:30,572 INFO L226 Difference]: Without dead ends: 27 [2020-10-28 15:04:30,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:04:30,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2020-10-28 15:04:30,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2020-10-28 15:04:30,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-28 15:04:30,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2020-10-28 15:04:30,580 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2020-10-28 15:04:30,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:30,580 INFO L481 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2020-10-28 15:04:30,580 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 15:04:30,580 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2020-10-28 15:04:30,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 15:04:30,581 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:30,581 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:30,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 15:04:30,582 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:30,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:30,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1219366806, now seen corresponding path program 6 times [2020-10-28 15:04:30,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:30,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854025170] [2020-10-28 15:04:30,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:30,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:30,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:30,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:30,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:30,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:30,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:30,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:31,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:31,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:31,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-28 15:04:31,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 15:04:31,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 982 [2020-10-28 15:04:31,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:31,578 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 15:04:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:31,578 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 15:04:31,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:31,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:31,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:31,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:31,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:31,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:31,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:31,753 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 15:04:31,753 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:31,753 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:31,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:31,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:31,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:31,754 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:31,758 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:31,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854025170] [2020-10-28 15:04:31,759 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:31,759 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 15:04:31,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089282897] [2020-10-28 15:04:31,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 15:04:31,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:31,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 15:04:31,762 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2020-10-28 15:04:31,762 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand 13 states. [2020-10-28 15:04:32,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:32,446 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2020-10-28 15:04:32,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 15:04:32,447 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 26 [2020-10-28 15:04:32,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:32,448 INFO L225 Difference]: With dead ends: 36 [2020-10-28 15:04:32,448 INFO L226 Difference]: Without dead ends: 29 [2020-10-28 15:04:32,449 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:04:32,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-28 15:04:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-28 15:04:32,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-28 15:04:32,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2020-10-28 15:04:32,456 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2020-10-28 15:04:32,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:32,456 INFO L481 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2020-10-28 15:04:32,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 15:04:32,456 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2020-10-28 15:04:32,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-28 15:04:32,457 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:32,457 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:32,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 15:04:32,458 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:32,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:32,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1730002932, now seen corresponding path program 7 times [2020-10-28 15:04:32,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:32,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [901384145] [2020-10-28 15:04:32,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:32,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:32,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:32,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:32,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:32,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:32,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:32,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:32,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:33,152 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:33,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:33,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 15:04:33,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-28 15:04:33,846 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1376 [2020-10-28 15:04:33,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:33,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:33,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 15:04:33,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:33,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 15:04:33,847 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:34,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:34,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:34,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:34,057 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:34,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:34,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:34,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:34,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:34,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:34,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:34,063 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:34,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [901384145] [2020-10-28 15:04:34,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:34,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 15:04:34,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505293952] [2020-10-28 15:04:34,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 15:04:34,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:34,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 15:04:34,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2020-10-28 15:04:34,065 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand 14 states. [2020-10-28 15:04:34,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:34,830 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2020-10-28 15:04:34,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 15:04:34,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 28 [2020-10-28 15:04:34,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:34,832 INFO L225 Difference]: With dead ends: 38 [2020-10-28 15:04:34,832 INFO L226 Difference]: Without dead ends: 31 [2020-10-28 15:04:34,833 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=130, Invalid=470, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:04:34,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-28 15:04:34,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2020-10-28 15:04:34,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 15:04:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2020-10-28 15:04:34,847 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2020-10-28 15:04:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:34,848 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2020-10-28 15:04:34,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 15:04:34,848 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2020-10-28 15:04:34,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 15:04:34,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:34,850 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:34,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 15:04:34,851 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:34,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:34,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1469919022, now seen corresponding path program 8 times [2020-10-28 15:04:34,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:34,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [618508325] [2020-10-28 15:04:34,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:34,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:34,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:34,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:34,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:35,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:35,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:35,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:35,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:35,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:35,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:35,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-28 15:04:35,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 15:04:35,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 958 [2020-10-28 15:04:35,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:35,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 15:04:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:35,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 15:04:35,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:36,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:36,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:36,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:36,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:36,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:36,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:36,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:04:36,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:36,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:36,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:36,049 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:36,054 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:36,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [618508325] [2020-10-28 15:04:36,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:36,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 15:04:36,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738109288] [2020-10-28 15:04:36,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 15:04:36,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:36,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 15:04:36,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2020-10-28 15:04:36,057 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand 15 states. [2020-10-28 15:04:36,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:36,935 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2020-10-28 15:04:36,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 15:04:36,936 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 30 [2020-10-28 15:04:36,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:36,937 INFO L225 Difference]: With dead ends: 40 [2020-10-28 15:04:36,937 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 15:04:36,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:04:36,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 15:04:36,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2020-10-28 15:04:36,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 15:04:36,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2020-10-28 15:04:36,946 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2020-10-28 15:04:36,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:36,947 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2020-10-28 15:04:36,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 15:04:36,947 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2020-10-28 15:04:36,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-28 15:04:36,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:36,948 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:36,948 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 15:04:36,949 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:36,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:36,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1398332880, now seen corresponding path program 9 times [2020-10-28 15:04:36,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:36,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638215806] [2020-10-28 15:04:36,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:36,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:36,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:37,993 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:37,993 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 15:04:37,993 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 15:04:37,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1029 [2020-10-28 15:04:37,994 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:37,994 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:37,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 15:04:37,994 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:37,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 15:04:37,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:38,223 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:38,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:38,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:38,231 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:38,231 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:38,232 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:38,232 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:38,232 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:38,232 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:38,232 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:38,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:38,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:38,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:38,239 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:38,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638215806] [2020-10-28 15:04:38,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:38,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 15:04:38,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555644627] [2020-10-28 15:04:38,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 15:04:38,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:38,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 15:04:38,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 15:04:38,241 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand 16 states. [2020-10-28 15:04:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:39,123 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2020-10-28 15:04:39,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 15:04:39,123 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 32 [2020-10-28 15:04:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:39,124 INFO L225 Difference]: With dead ends: 42 [2020-10-28 15:04:39,124 INFO L226 Difference]: Without dead ends: 35 [2020-10-28 15:04:39,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=176, Invalid=636, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:04:39,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-28 15:04:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-28 15:04:39,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-28 15:04:39,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2020-10-28 15:04:39,139 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2020-10-28 15:04:39,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:39,139 INFO L481 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2020-10-28 15:04:39,139 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 15:04:39,139 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2020-10-28 15:04:39,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 15:04:39,140 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:39,140 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:39,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 15:04:39,141 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:39,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:39,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1323527154, now seen corresponding path program 10 times [2020-10-28 15:04:39,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:39,142 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537946450] [2020-10-28 15:04:39,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:39,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:39,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:39,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:40,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:40,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 15:04:40,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-28 15:04:40,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1394 [2020-10-28 15:04:40,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:40,550 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 15:04:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:40,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 15:04:40,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:40,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:40,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:40,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:40,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:40,849 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:40,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:40,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 15:04:40,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:40,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:40,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:40,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:40,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:40,865 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:40,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537946450] [2020-10-28 15:04:40,866 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:40,866 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 15:04:40,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454684570] [2020-10-28 15:04:40,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 15:04:40,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:40,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 15:04:40,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2020-10-28 15:04:40,871 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand 17 states. [2020-10-28 15:04:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:41,950 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2020-10-28 15:04:41,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 15:04:41,950 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 34 [2020-10-28 15:04:41,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:41,951 INFO L225 Difference]: With dead ends: 44 [2020-10-28 15:04:41,951 INFO L226 Difference]: Without dead ends: 37 [2020-10-28 15:04:41,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=728, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:04:41,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2020-10-28 15:04:41,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2020-10-28 15:04:41,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 15:04:41,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2020-10-28 15:04:41,960 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2020-10-28 15:04:41,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:41,960 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2020-10-28 15:04:41,961 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 15:04:41,961 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2020-10-28 15:04:41,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 15:04:41,962 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:41,962 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:41,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 15:04:41,962 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:41,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:41,963 INFO L82 PathProgramCache]: Analyzing trace with hash 1845298796, now seen corresponding path program 11 times [2020-10-28 15:04:41,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:41,963 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1047967881] [2020-10-28 15:04:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:41,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:41,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:42,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:43,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:43,252 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 15:04:43,252 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 15:04:43,252 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1276 [2020-10-28 15:04:43,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:43,253 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 15:04:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:43,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 15:04:43,253 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:43,550 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:43,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:43,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:43,557 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:43,557 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:43,557 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:43,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:04:43,558 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:43,558 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:43,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:43,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:43,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:43,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:43,563 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:43,564 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1047967881] [2020-10-28 15:04:43,564 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:43,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 15:04:43,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645803526] [2020-10-28 15:04:43,565 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 15:04:43,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:43,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 15:04:43,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2020-10-28 15:04:43,567 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand 18 states. [2020-10-28 15:04:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:44,774 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2020-10-28 15:04:44,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 15:04:44,774 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 36 [2020-10-28 15:04:44,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:44,775 INFO L225 Difference]: With dead ends: 46 [2020-10-28 15:04:44,775 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 15:04:44,779 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=230, Invalid=826, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:04:44,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 15:04:44,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 15:04:44,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 15:04:44,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2020-10-28 15:04:44,795 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2020-10-28 15:04:44,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:44,796 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2020-10-28 15:04:44,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 15:04:44,796 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2020-10-28 15:04:44,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 15:04:44,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:44,800 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:44,800 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 15:04:44,801 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:44,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:44,801 INFO L82 PathProgramCache]: Analyzing trace with hash 1955223882, now seen corresponding path program 12 times [2020-10-28 15:04:44,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:44,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141013167] [2020-10-28 15:04:44,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:44,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:44,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:44,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:44,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:44,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:44,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:45,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:45,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:45,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:45,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:45,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:45,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:45,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:46,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:46,617 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 15:04:46,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-10-28 15:04:46,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1799 [2020-10-28 15:04:46,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:46,618 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:46,618 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 15:04:46,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:46,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 15:04:46,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:46,938 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:46,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:46,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:46,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:46,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:46,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:46,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:04:46,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:46,945 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:46,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:46,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:46,952 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:46,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141013167] [2020-10-28 15:04:46,953 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:46,953 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 15:04:46,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950427017] [2020-10-28 15:04:46,954 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 15:04:46,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:46,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 15:04:46,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-28 15:04:46,956 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand 19 states. [2020-10-28 15:04:48,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:48,260 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2020-10-28 15:04:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 15:04:48,261 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 38 [2020-10-28 15:04:48,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:48,262 INFO L225 Difference]: With dead ends: 48 [2020-10-28 15:04:48,262 INFO L226 Difference]: Without dead ends: 41 [2020-10-28 15:04:48,264 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=260, Invalid=930, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:04:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-28 15:04:48,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2020-10-28 15:04:48,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-28 15:04:48,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2020-10-28 15:04:48,272 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2020-10-28 15:04:48,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:48,273 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2020-10-28 15:04:48,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 15:04:48,273 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2020-10-28 15:04:48,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 15:04:48,274 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:48,274 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:48,274 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 15:04:48,279 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:48,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:48,280 INFO L82 PathProgramCache]: Analyzing trace with hash 219049128, now seen corresponding path program 13 times [2020-10-28 15:04:48,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:48,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [196949975] [2020-10-28 15:04:48,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:48,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:48,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,447 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:48,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:49,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:50,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:50,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 15:04:50,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 14 [2020-10-28 15:04:50,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2626 [2020-10-28 15:04:50,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:50,920 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:50,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 15:04:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:50,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 15:04:50,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:04:51,290 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:51,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:51,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:51,297 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:51,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:51,298 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:51,298 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:04:51,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:51,298 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:51,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:51,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:51,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:51,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:51,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [196949975] [2020-10-28 15:04:51,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:51,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 15:04:51,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102325258] [2020-10-28 15:04:51,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 15:04:51,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:51,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 15:04:51,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2020-10-28 15:04:51,308 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand 20 states. [2020-10-28 15:04:52,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:52,760 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2020-10-28 15:04:52,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 15:04:52,760 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 40 [2020-10-28 15:04:52,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:52,761 INFO L225 Difference]: With dead ends: 50 [2020-10-28 15:04:52,761 INFO L226 Difference]: Without dead ends: 43 [2020-10-28 15:04:52,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=292, Invalid=1040, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 15:04:52,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-28 15:04:52,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2020-10-28 15:04:52,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 15:04:52,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2020-10-28 15:04:52,771 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2020-10-28 15:04:52,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:52,771 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2020-10-28 15:04:52,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 15:04:52,771 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2020-10-28 15:04:52,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 15:04:52,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:52,772 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:52,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 15:04:52,772 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:52,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:52,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1797578618, now seen corresponding path program 14 times [2020-10-28 15:04:52,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:52,773 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1556762600] [2020-10-28 15:04:52,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:52,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:52,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,844 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:52,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:53,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:55,727 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:55,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 15:04:55,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-10-28 15:04:55,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2941 [2020-10-28 15:04:55,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:55,728 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:55,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 15:04:55,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:04:55,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 15:04:55,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:56,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:04:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:56,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:56,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:04:56,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:04:56,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:04:56,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:04:56,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:04:56,162 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:04:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:04:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:04:56,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:04:56,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:04:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:04:56,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1556762600] [2020-10-28 15:04:56,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:04:56,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 15:04:56,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014764419] [2020-10-28 15:04:56,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 15:04:56,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:04:56,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 15:04:56,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=380, Unknown=0, NotChecked=0, Total=420 [2020-10-28 15:04:56,171 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand 21 states. [2020-10-28 15:04:57,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:04:57,793 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2020-10-28 15:04:57,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 15:04:57,795 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-28 15:04:57,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:04:57,796 INFO L225 Difference]: With dead ends: 52 [2020-10-28 15:04:57,796 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 15:04:57,798 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=326, Invalid=1156, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:04:57,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 15:04:57,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2020-10-28 15:04:57,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-28 15:04:57,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2020-10-28 15:04:57,806 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2020-10-28 15:04:57,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:04:57,806 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2020-10-28 15:04:57,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 15:04:57,806 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2020-10-28 15:04:57,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 15:04:57,807 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:04:57,807 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:04:57,807 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 15:04:57,807 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:04:57,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:04:57,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1548375268, now seen corresponding path program 15 times [2020-10-28 15:04:57,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:04:57,808 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1416598441] [2020-10-28 15:04:57,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:04:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:04:57,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:57,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:57,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:57,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:57,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:57,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:04:58,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:00,277 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:00,277 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 15:05:00,278 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-28 15:05:00,278 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2457 [2020-10-28 15:05:00,278 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:00,278 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:00,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 15:05:00,278 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:00,279 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 15:05:00,279 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:00,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:00,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:00,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:00,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:00,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:00,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:00,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:00,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:00,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:00,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:00,731 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:00,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1416598441] [2020-10-28 15:05:00,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:00,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 15:05:00,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618997405] [2020-10-28 15:05:00,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 15:05:00,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:00,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 15:05:00,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2020-10-28 15:05:00,733 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand 22 states. [2020-10-28 15:05:02,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:02,547 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2020-10-28 15:05:02,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 15:05:02,547 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 44 [2020-10-28 15:05:02,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:02,549 INFO L225 Difference]: With dead ends: 54 [2020-10-28 15:05:02,549 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 15:05:02,550 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=362, Invalid=1278, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:05:02,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 15:05:02,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2020-10-28 15:05:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 15:05:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2020-10-28 15:05:02,561 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2020-10-28 15:05:02,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:02,562 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2020-10-28 15:05:02,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 15:05:02,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2020-10-28 15:05:02,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 15:05:02,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:02,563 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:02,563 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 15:05:02,563 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:02,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:02,564 INFO L82 PathProgramCache]: Analyzing trace with hash 79555010, now seen corresponding path program 16 times [2020-10-28 15:05:02,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:02,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292142804] [2020-10-28 15:05:02,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:02,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:02,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:02,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:04,733 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:04,733 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 15:05:04,733 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 17 [2020-10-28 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2156 [2020-10-28 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-28 15:05:04,734 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:05,219 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:05,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:05,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:05,225 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:05,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:05,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:05,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:05,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:05,226 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:05,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:05,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:05,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:05,233 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:05,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1292142804] [2020-10-28 15:05:05,234 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:05,234 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 15:05:05,234 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619250199] [2020-10-28 15:05:05,234 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 15:05:05,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:05,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 15:05:05,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=462, Unknown=0, NotChecked=0, Total=506 [2020-10-28 15:05:05,237 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand 23 states. [2020-10-28 15:05:07,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:07,204 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2020-10-28 15:05:07,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 15:05:07,206 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 46 [2020-10-28 15:05:07,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:07,206 INFO L225 Difference]: With dead ends: 56 [2020-10-28 15:05:07,207 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 15:05:07,208 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=400, Invalid=1406, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:05:07,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 15:05:07,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2020-10-28 15:05:07,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-28 15:05:07,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2020-10-28 15:05:07,216 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2020-10-28 15:05:07,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:07,216 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2020-10-28 15:05:07,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 15:05:07,216 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2020-10-28 15:05:07,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 15:05:07,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:07,217 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:07,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 15:05:07,218 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:07,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:07,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1587527456, now seen corresponding path program 17 times [2020-10-28 15:05:07,218 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:07,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674385912] [2020-10-28 15:05:07,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:07,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:07,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,386 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:07,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,330 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 18 [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3100 [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-28 15:05:10,331 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:10,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:10,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:10,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:10,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:10,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:10,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:10,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:10,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:10,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:10,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:10,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:10,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:10,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:10,848 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:10,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674385912] [2020-10-28 15:05:10,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:10,849 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 15:05:10,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424747975] [2020-10-28 15:05:10,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 15:05:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:10,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 15:05:10,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=506, Unknown=0, NotChecked=0, Total=552 [2020-10-28 15:05:10,853 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand 24 states. [2020-10-28 15:05:12,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:12,994 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2020-10-28 15:05:12,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 15:05:12,994 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 48 [2020-10-28 15:05:12,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:12,995 INFO L225 Difference]: With dead ends: 58 [2020-10-28 15:05:12,995 INFO L226 Difference]: Without dead ends: 51 [2020-10-28 15:05:12,997 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=440, Invalid=1540, Unknown=0, NotChecked=0, Total=1980 [2020-10-28 15:05:12,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-28 15:05:13,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2020-10-28 15:05:13,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-28 15:05:13,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2020-10-28 15:05:13,006 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2020-10-28 15:05:13,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:13,006 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2020-10-28 15:05:13,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 15:05:13,006 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2020-10-28 15:05:13,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 15:05:13,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:13,007 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:13,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 15:05:13,007 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:13,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:13,008 INFO L82 PathProgramCache]: Analyzing trace with hash -949897986, now seen corresponding path program 18 times [2020-10-28 15:05:13,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:13,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1692579404] [2020-10-28 15:05:13,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:13,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:13,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,206 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:13,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:14,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:14,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 15:05:14,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 19 [2020-10-28 15:05:14,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1848 [2020-10-28 15:05:14,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:14,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 15:05:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:14,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-28 15:05:14,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:15,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:15,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:15,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:15,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:15,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:15,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:15,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:15,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:15,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:15,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:15,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:15,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1692579404] [2020-10-28 15:05:15,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:15,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 15:05:15,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205369785] [2020-10-28 15:05:15,426 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 15:05:15,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:15,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 15:05:15,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=552, Unknown=0, NotChecked=0, Total=600 [2020-10-28 15:05:15,427 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand 25 states. [2020-10-28 15:05:17,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:17,780 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2020-10-28 15:05:17,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 15:05:17,780 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 50 [2020-10-28 15:05:17,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:17,781 INFO L225 Difference]: With dead ends: 60 [2020-10-28 15:05:17,782 INFO L226 Difference]: Without dead ends: 53 [2020-10-28 15:05:17,783 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=482, Invalid=1680, Unknown=0, NotChecked=0, Total=2162 [2020-10-28 15:05:17,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-10-28 15:05:17,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2020-10-28 15:05:17,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-28 15:05:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2020-10-28 15:05:17,791 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2020-10-28 15:05:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:17,792 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2020-10-28 15:05:17,792 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 15:05:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2020-10-28 15:05:17,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 15:05:17,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:17,793 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:17,793 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 15:05:17,793 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:17,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:17,793 INFO L82 PathProgramCache]: Analyzing trace with hash 125676380, now seen corresponding path program 19 times [2020-10-28 15:05:17,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:17,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [389153581] [2020-10-28 15:05:17,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:17,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:17,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:17,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:17,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:17,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:17,973 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:17,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,394 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:18,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:19,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:21,004 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 20 [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3196 [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 15:05:21,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:21,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:21,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:21,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:21,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:21,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:21,642 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:05:21,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:21,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:21,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:21,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:21,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:21,643 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 15:05:21,656 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:21,658 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [389153581] [2020-10-28 15:05:21,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:21,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 15:05:21,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225872673] [2020-10-28 15:05:21,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 15:05:21,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:21,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 15:05:21,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2020-10-28 15:05:21,663 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand 26 states. [2020-10-28 15:05:21,872 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:05:24,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:24,204 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2020-10-28 15:05:24,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 15:05:24,205 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-10-28 15:05:24,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:24,205 INFO L225 Difference]: With dead ends: 62 [2020-10-28 15:05:24,206 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 15:05:24,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=526, Invalid=1826, Unknown=0, NotChecked=0, Total=2352 [2020-10-28 15:05:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 15:05:24,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2020-10-28 15:05:24,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-28 15:05:24,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2020-10-28 15:05:24,218 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2020-10-28 15:05:24,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:24,219 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2020-10-28 15:05:24,219 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 15:05:24,219 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2020-10-28 15:05:24,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-28 15:05:24,220 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:24,220 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:24,220 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 15:05:24,220 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash -1334476230, now seen corresponding path program 20 times [2020-10-28 15:05:24,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:24,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539383185] [2020-10-28 15:05:24,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:24,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,496 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:24,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:25,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:25,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 15:05:25,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 21 [2020-10-28 15:05:25,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1723 [2020-10-28 15:05:25,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:25,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 15:05:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:25,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 15:05:25,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:26,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:26,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:26,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:26,616 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:26,616 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:26,616 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:05:26,617 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:26,617 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:26,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:26,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:26,625 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:26,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539383185] [2020-10-28 15:05:26,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:26,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 15:05:26,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706446055] [2020-10-28 15:05:26,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 15:05:26,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:26,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 15:05:26,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2020-10-28 15:05:26,627 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand 27 states. [2020-10-28 15:05:26,805 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:05:26,932 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:05:29,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:29,370 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2020-10-28 15:05:29,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 15:05:29,374 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 54 [2020-10-28 15:05:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:29,374 INFO L225 Difference]: With dead ends: 64 [2020-10-28 15:05:29,375 INFO L226 Difference]: Without dead ends: 57 [2020-10-28 15:05:29,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=572, Invalid=1978, Unknown=0, NotChecked=0, Total=2550 [2020-10-28 15:05:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-28 15:05:29,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2020-10-28 15:05:29,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-28 15:05:29,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2020-10-28 15:05:29,383 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2020-10-28 15:05:29,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:29,384 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2020-10-28 15:05:29,384 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 15:05:29,384 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2020-10-28 15:05:29,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-28 15:05:29,385 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:29,385 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:29,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 15:05:29,385 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:29,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:29,386 INFO L82 PathProgramCache]: Analyzing trace with hash -86828648, now seen corresponding path program 21 times [2020-10-28 15:05:29,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:29,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [531089387] [2020-10-28 15:05:29,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:29,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:29,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,622 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,700 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:29,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:31,519 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:31,519 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-10-28 15:05:31,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 22 [2020-10-28 15:05:31,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2120 [2020-10-28 15:05:31,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:31,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:31,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 15:05:31,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:31,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-28 15:05:31,520 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:32,211 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:32,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:32,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:32,220 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:32,220 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:32,220 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:32,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 15:05:32,221 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:32,221 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:32,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:32,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:32,221 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:32,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:32,230 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:32,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [531089387] [2020-10-28 15:05:32,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:32,239 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 15:05:32,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782171666] [2020-10-28 15:05:32,241 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 15:05:32,241 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:32,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 15:05:32,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=702, Unknown=0, NotChecked=0, Total=756 [2020-10-28 15:05:32,243 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand 28 states. [2020-10-28 15:05:32,435 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:05:32,574 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:05:32,707 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:05:32,839 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:05:32,974 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:05:35,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:35,341 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2020-10-28 15:05:35,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 15:05:35,341 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 56 [2020-10-28 15:05:35,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:35,343 INFO L225 Difference]: With dead ends: 66 [2020-10-28 15:05:35,343 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 15:05:35,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=620, Invalid=2136, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 15:05:35,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 15:05:35,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2020-10-28 15:05:35,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 15:05:35,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2020-10-28 15:05:35,350 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2020-10-28 15:05:35,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:35,351 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2020-10-28 15:05:35,351 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 15:05:35,351 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2020-10-28 15:05:35,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2020-10-28 15:05:35,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:35,351 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:35,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 15:05:35,352 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:35,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:35,352 INFO L82 PathProgramCache]: Analyzing trace with hash 606622070, now seen corresponding path program 22 times [2020-10-28 15:05:35,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:35,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [250396947] [2020-10-28 15:05:35,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:35,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:35,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:35,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,125 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:36,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:38,833 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:38,834 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-28 15:05:38,834 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 23 [2020-10-28 15:05:38,834 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3467 [2020-10-28 15:05:38,834 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:38,834 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 15:05:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:38,835 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-28 15:05:38,835 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:39,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:39,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:39,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:39,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:39,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:39,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:39,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:39,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:39,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:39,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:39,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:39,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:39,628 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:39,628 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [250396947] [2020-10-28 15:05:39,628 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:39,628 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 15:05:39,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240735601] [2020-10-28 15:05:39,629 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 15:05:39,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:39,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 15:05:39,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2020-10-28 15:05:39,630 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand 29 states. [2020-10-28 15:05:39,826 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:05:39,965 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:05:40,107 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:05:40,239 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:05:40,384 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:05:42,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:42,961 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2020-10-28 15:05:42,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 15:05:42,962 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 58 [2020-10-28 15:05:42,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:42,963 INFO L225 Difference]: With dead ends: 68 [2020-10-28 15:05:42,963 INFO L226 Difference]: Without dead ends: 61 [2020-10-28 15:05:42,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=670, Invalid=2300, Unknown=0, NotChecked=0, Total=2970 [2020-10-28 15:05:42,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-28 15:05:42,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2020-10-28 15:05:42,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 15:05:42,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2020-10-28 15:05:42,969 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2020-10-28 15:05:42,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:42,970 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2020-10-28 15:05:42,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 15:05:42,970 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2020-10-28 15:05:42,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-28 15:05:42,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:42,970 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:42,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 15:05:42,971 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash 1292831188, now seen corresponding path program 23 times [2020-10-28 15:05:42,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:42,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253381103] [2020-10-28 15:05:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:42,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:43,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:44,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:47,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:47,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-28 15:05:47,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 24 [2020-10-28 15:05:47,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4217 [2020-10-28 15:05:47,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:47,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 15:05:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:47,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-28 15:05:47,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:48,052 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:48,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:48,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:48,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:48,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:48,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:48,056 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:05:48,056 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:48,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:48,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:48,057 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:48,063 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:48,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253381103] [2020-10-28 15:05:48,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:48,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 15:05:48,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12784509] [2020-10-28 15:05:48,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 15:05:48,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:48,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 15:05:48,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2020-10-28 15:05:48,065 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand 30 states. [2020-10-28 15:05:48,273 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:05:48,415 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:05:48,556 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:05:48,694 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:05:48,833 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:05:48,975 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:05:49,112 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:05:49,257 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-28 15:05:51,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:05:51,705 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2020-10-28 15:05:51,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 15:05:51,705 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 60 [2020-10-28 15:05:51,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:05:51,706 INFO L225 Difference]: With dead ends: 70 [2020-10-28 15:05:51,707 INFO L226 Difference]: Without dead ends: 63 [2020-10-28 15:05:51,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=722, Invalid=2470, Unknown=0, NotChecked=0, Total=3192 [2020-10-28 15:05:51,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-28 15:05:51,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2020-10-28 15:05:51,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 15:05:51,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2020-10-28 15:05:51,715 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2020-10-28 15:05:51,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:05:51,715 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2020-10-28 15:05:51,715 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 15:05:51,715 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2020-10-28 15:05:51,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-28 15:05:51,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:05:51,716 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:05:51,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 15:05:51,716 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:05:51,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:05:51,717 INFO L82 PathProgramCache]: Analyzing trace with hash -685169998, now seen corresponding path program 24 times [2020-10-28 15:05:51,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:05:51,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906489369] [2020-10-28 15:05:51,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:05:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:51,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:51,979 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,091 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:52,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:53,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:55,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:55,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-28 15:05:55,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 25 [2020-10-28 15:05:55,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4031 [2020-10-28 15:05:55,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:55,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 15:05:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:05:55,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-28 15:05:55,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:05:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:05:56,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:05:56,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:05:56,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:05:56,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:05:56,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:05:56,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:05:56,678 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:05:56,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:05:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:05:56,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:05:56,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:05:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:05:56,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906489369] [2020-10-28 15:05:56,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:05:56,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 15:05:56,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229218110] [2020-10-28 15:05:56,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 15:05:56,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:05:56,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 15:05:56,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=870, Unknown=0, NotChecked=0, Total=930 [2020-10-28 15:05:56,688 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand 31 states. [2020-10-28 15:05:56,907 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:05:57,058 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:05:57,202 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:05:57,346 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:05:57,494 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:05:57,636 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:05:57,792 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:06:00,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:00,556 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2020-10-28 15:06:00,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 15:06:00,557 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 62 [2020-10-28 15:06:00,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:00,558 INFO L225 Difference]: With dead ends: 72 [2020-10-28 15:06:00,558 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 15:06:00,561 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=776, Invalid=2646, Unknown=0, NotChecked=0, Total=3422 [2020-10-28 15:06:00,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 15:06:00,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2020-10-28 15:06:00,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-28 15:06:00,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2020-10-28 15:06:00,573 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2020-10-28 15:06:00,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:00,574 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2020-10-28 15:06:00,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 15:06:00,574 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2020-10-28 15:06:00,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-28 15:06:00,575 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:00,575 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:00,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 15:06:00,575 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:00,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:00,580 INFO L82 PathProgramCache]: Analyzing trace with hash 1126202384, now seen corresponding path program 25 times [2020-10-28 15:06:00,580 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:00,580 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519309417] [2020-10-28 15:06:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:00,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:00,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:01,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:03,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:03,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-28 15:06:03,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 26 [2020-10-28 15:06:03,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3101 [2020-10-28 15:06:03,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:03,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:03,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 15:06:03,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:03,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 15:06:03,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:04,662 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:04,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:04,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:04,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:04,670 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:04,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:04,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 15:06:04,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:04,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:04,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:04,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:04,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:04,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:04,680 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:04,681 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519309417] [2020-10-28 15:06:04,681 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:04,681 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 15:06:04,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573518941] [2020-10-28 15:06:04,683 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 15:06:04,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:04,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 15:06:04,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=930, Unknown=0, NotChecked=0, Total=992 [2020-10-28 15:06:04,685 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand 32 states. [2020-10-28 15:06:04,910 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:06:05,080 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:06:05,240 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:06:05,396 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:06:05,547 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:06:05,704 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:06:05,859 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:06:06,014 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:06:06,162 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:06:08,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:08,815 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2020-10-28 15:06:08,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 15:06:08,816 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 64 [2020-10-28 15:06:08,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:08,817 INFO L225 Difference]: With dead ends: 74 [2020-10-28 15:06:08,817 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 15:06:08,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=832, Invalid=2828, Unknown=0, NotChecked=0, Total=3660 [2020-10-28 15:06:08,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 15:06:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2020-10-28 15:06:08,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 15:06:08,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2020-10-28 15:06:08,825 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2020-10-28 15:06:08,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:08,826 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2020-10-28 15:06:08,826 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 15:06:08,826 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2020-10-28 15:06:08,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-28 15:06:08,826 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:08,826 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:08,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 15:06:08,827 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:08,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:08,827 INFO L82 PathProgramCache]: Analyzing trace with hash -1901660690, now seen corresponding path program 26 times [2020-10-28 15:06:08,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:08,827 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1391581795] [2020-10-28 15:06:08,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:08,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:08,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,056 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:09,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:12,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:12,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-28 15:06:12,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-28 15:06:12,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3274 [2020-10-28 15:06:12,116 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:12,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 15:06:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:12,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-28 15:06:12,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:13,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:13,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:13,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:13,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:13,134 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:13,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:06:13,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:13,135 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:13,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:13,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:13,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:13,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:13,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1391581795] [2020-10-28 15:06:13,143 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:13,144 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 15:06:13,144 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744543136] [2020-10-28 15:06:13,144 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 15:06:13,144 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:13,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 15:06:13,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=992, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 15:06:13,145 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand 33 states. [2020-10-28 15:06:13,357 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:06:13,494 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:06:13,650 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:06:13,808 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:06:13,979 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:06:14,136 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:06:14,292 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:06:14,448 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:06:14,603 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:06:14,758 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:06:17,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:17,431 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2020-10-28 15:06:17,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 15:06:17,432 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 66 [2020-10-28 15:06:17,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:17,433 INFO L225 Difference]: With dead ends: 76 [2020-10-28 15:06:17,433 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 15:06:17,436 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=890, Invalid=3016, Unknown=0, NotChecked=0, Total=3906 [2020-10-28 15:06:17,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 15:06:17,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2020-10-28 15:06:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 15:06:17,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2020-10-28 15:06:17,444 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2020-10-28 15:06:17,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:17,444 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2020-10-28 15:06:17,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 15:06:17,444 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2020-10-28 15:06:17,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-28 15:06:17,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:17,445 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:17,445 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 15:06:17,446 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:17,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:17,446 INFO L82 PathProgramCache]: Analyzing trace with hash 309751884, now seen corresponding path program 27 times [2020-10-28 15:06:17,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:17,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1783740829] [2020-10-28 15:06:17,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:17,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:17,472 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,814 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:17,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:18,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:19,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:22,463 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:22,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-10-28 15:06:22,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 28 [2020-10-28 15:06:22,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:06:22,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:22,463 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 15:06:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:22,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-28 15:06:22,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:23,583 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:23,586 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:23,587 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:23,587 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:23,588 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:23,588 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:23,588 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:23,588 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:23,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:23,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:23,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:23,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:23,596 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:23,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1783740829] [2020-10-28 15:06:23,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:23,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 15:06:23,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722046460] [2020-10-28 15:06:23,597 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 15:06:23,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:23,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 15:06:23,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 15:06:23,598 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand 34 states. [2020-10-28 15:06:23,824 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:06:23,994 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:06:24,156 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:06:24,311 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:06:24,470 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:06:24,630 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:06:24,795 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:06:24,952 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:06:25,111 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:06:25,273 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:06:28,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:28,308 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2020-10-28 15:06:28,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 15:06:28,309 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 68 [2020-10-28 15:06:28,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:28,310 INFO L225 Difference]: With dead ends: 78 [2020-10-28 15:06:28,310 INFO L226 Difference]: Without dead ends: 71 [2020-10-28 15:06:28,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2020-10-28 15:06:28,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-28 15:06:28,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2020-10-28 15:06:28,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 15:06:28,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2020-10-28 15:06:28,321 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2020-10-28 15:06:28,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:28,321 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2020-10-28 15:06:28,321 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 15:06:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2020-10-28 15:06:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2020-10-28 15:06:28,322 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:28,322 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:28,323 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 15:06:28,323 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:28,323 INFO L82 PathProgramCache]: Analyzing trace with hash -531576022, now seen corresponding path program 28 times [2020-10-28 15:06:28,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:28,323 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1463114640] [2020-10-28 15:06:28,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:28,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:28,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,693 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,718 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:28,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:32,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:32,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-28 15:06:32,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-28 15:06:32,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3887 [2020-10-28 15:06:32,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:32,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 15:06:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:32,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-28 15:06:32,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:33,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:33,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:33,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:33,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:33,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:33,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:33,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:06:33,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:33,405 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:33,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:33,405 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:33,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1463114640] [2020-10-28 15:06:33,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:33,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 15:06:33,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369983178] [2020-10-28 15:06:33,415 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 15:06:33,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:33,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 15:06:33,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:06:33,417 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand 35 states. [2020-10-28 15:06:33,656 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-28 15:06:33,828 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:06:33,996 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:06:34,189 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:06:34,358 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:06:34,524 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:06:34,694 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:06:34,857 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:06:35,024 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:06:35,190 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:06:35,362 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:06:35,525 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:06:38,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:38,389 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2020-10-28 15:06:38,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 15:06:38,390 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 70 [2020-10-28 15:06:38,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:38,391 INFO L225 Difference]: With dead ends: 80 [2020-10-28 15:06:38,391 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 15:06:38,393 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1012, Invalid=3410, Unknown=0, NotChecked=0, Total=4422 [2020-10-28 15:06:38,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 15:06:38,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2020-10-28 15:06:38,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 15:06:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2020-10-28 15:06:38,402 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2020-10-28 15:06:38,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:38,402 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2020-10-28 15:06:38,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 15:06:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2020-10-28 15:06:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-28 15:06:38,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:38,403 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:38,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 15:06:38,404 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1593842040, now seen corresponding path program 29 times [2020-10-28 15:06:38,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:38,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [957858808] [2020-10-28 15:06:38,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:38,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:38,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,711 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:38,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:40,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:43,424 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:43,424 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-28 15:06:43,424 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-28 15:06:43,424 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-28 15:06:43,424 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:43,424 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 15:06:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:43,425 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-28 15:06:43,425 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:44,654 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:44,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:44,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:44,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:44,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:44,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:44,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:06:44,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:44,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:44,659 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:44,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:44,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:44,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [957858808] [2020-10-28 15:06:44,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:44,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 15:06:44,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546986763] [2020-10-28 15:06:44,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 15:06:44,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:44,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 15:06:44,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=1190, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 15:06:44,672 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand 36 states. [2020-10-28 15:06:44,928 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-28 15:06:45,107 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-28 15:06:45,282 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:06:45,460 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:06:45,627 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:06:45,800 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:06:45,974 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:06:46,143 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:06:46,309 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:06:46,476 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:06:46,648 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:06:46,817 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:06:46,981 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:06:49,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:06:49,870 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2020-10-28 15:06:49,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:06:49,871 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 72 [2020-10-28 15:06:49,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:06:49,873 INFO L225 Difference]: With dead ends: 82 [2020-10-28 15:06:49,873 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 15:06:49,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=1076, Invalid=3616, Unknown=0, NotChecked=0, Total=4692 [2020-10-28 15:06:49,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 15:06:49,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2020-10-28 15:06:49,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-28 15:06:49,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2020-10-28 15:06:49,881 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2020-10-28 15:06:49,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:06:49,881 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2020-10-28 15:06:49,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 15:06:49,881 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2020-10-28 15:06:49,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-28 15:06:49,882 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:06:49,882 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:06:49,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 15:06:49,882 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:06:49,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:06:49,883 INFO L82 PathProgramCache]: Analyzing trace with hash -229268890, now seen corresponding path program 30 times [2020-10-28 15:06:49,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:06:49,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943393354] [2020-10-28 15:06:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:06:49,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:49,910 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,791 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:50,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:51,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:52,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:54,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:54,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-28 15:06:54,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 30 [2020-10-28 15:06:54,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:06:54,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:54,901 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:54,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 15:06:54,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:06:54,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-28 15:06:54,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:56,026 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:06:56,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:06:56,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:06:56,030 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:06:56,030 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:06:56,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:06:56,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:06:56,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:06:56,031 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:06:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:06:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:06:56,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:06:56,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:06:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:06:56,042 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943393354] [2020-10-28 15:06:56,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:06:56,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 15:06:56,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912478965] [2020-10-28 15:06:56,043 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 15:06:56,043 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:06:56,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 15:06:56,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 15:06:56,044 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand 35 states. [2020-10-28 15:06:56,272 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 32 [2020-10-28 15:06:56,461 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 34 [2020-10-28 15:06:56,652 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 33 [2020-10-28 15:06:56,841 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-28 15:06:57,018 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-28 15:06:57,199 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:06:57,382 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:06:57,564 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:06:57,742 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:06:57,922 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:06:58,105 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:06:58,295 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:06:58,475 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:06:58,653 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:06:58,833 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:06:59,012 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:07:01,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:01,862 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2020-10-28 15:07:01,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 15:07:01,863 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 74 [2020-10-28 15:07:01,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:01,865 INFO L225 Difference]: With dead ends: 86 [2020-10-28 15:07:01,865 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 15:07:01,866 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=1213, Invalid=3343, Unknown=0, NotChecked=0, Total=4556 [2020-10-28 15:07:01,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 15:07:01,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2020-10-28 15:07:01,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 15:07:01,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2020-10-28 15:07:01,875 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 74 [2020-10-28 15:07:01,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:01,875 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2020-10-28 15:07:01,875 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 15:07:01,875 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2020-10-28 15:07:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-10-28 15:07:01,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:01,876 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:01,876 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 15:07:01,876 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:01,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:01,876 INFO L82 PathProgramCache]: Analyzing trace with hash 996440994, now seen corresponding path program 31 times [2020-10-28 15:07:01,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:01,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [746867786] [2020-10-28 15:07:01,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:01,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:01,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,286 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,306 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,805 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:02,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:03,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:06,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:06,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:06,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-28 15:07:06,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 33 [2020-10-28 15:07:06,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 15:07:06,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:06,904 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:06,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 15:07:06,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:06,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 71 [2020-10-28 15:07:06,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:08,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:08,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:08,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:08,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:08,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:08,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:08,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:07:08,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:08,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:08,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:08,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:08,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:08,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:08,407 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:08,408 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [746867786] [2020-10-28 15:07:08,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:08,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 15:07:08,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055116251] [2020-10-28 15:07:08,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 15:07:08,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:08,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 15:07:08,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1406, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 15:07:08,409 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand 39 states. [2020-10-28 15:07:08,681 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-28 15:07:08,877 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-28 15:07:09,061 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-28 15:07:09,251 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-28 15:07:09,448 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-28 15:07:09,640 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:07:09,835 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:07:10,026 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:07:10,221 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:07:10,407 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:07:10,596 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:07:10,781 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:07:10,968 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:07:11,152 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:07:11,334 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:07:11,509 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:07:11,685 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-28 15:07:14,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:14,690 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2020-10-28 15:07:14,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-28 15:07:14,691 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 78 [2020-10-28 15:07:14,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:14,693 INFO L225 Difference]: With dead ends: 88 [2020-10-28 15:07:14,693 INFO L226 Difference]: Without dead ends: 81 [2020-10-28 15:07:14,694 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=1280, Invalid=4270, Unknown=0, NotChecked=0, Total=5550 [2020-10-28 15:07:14,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-28 15:07:14,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2020-10-28 15:07:14,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 15:07:14,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2020-10-28 15:07:14,705 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2020-10-28 15:07:14,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:14,705 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2020-10-28 15:07:14,706 INFO L482 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-28 15:07:14,706 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2020-10-28 15:07:14,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-10-28 15:07:14,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:14,706 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:14,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 15:07:14,707 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:14,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:14,707 INFO L82 PathProgramCache]: Analyzing trace with hash -2048304896, now seen corresponding path program 32 times [2020-10-28 15:07:14,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:14,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200790220] [2020-10-28 15:07:14,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:14,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:14,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,228 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,278 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,450 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:15,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:16,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:17,606 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:19,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:19,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-28 15:07:19,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 34 [2020-10-28 15:07:19,725 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:07:19,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:19,727 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 15:07:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:19,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 73 [2020-10-28 15:07:19,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 15:07:21,352 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:21,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:21,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:21,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:21,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:21,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 15:07:21,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:21,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:21,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:21,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:21,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:21,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:21,372 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:21,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200790220] [2020-10-28 15:07:21,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:21,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 15:07:21,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362038501] [2020-10-28 15:07:21,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 15:07:21,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:21,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 15:07:21,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1482, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 15:07:21,373 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand 40 states. [2020-10-28 15:07:21,672 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-28 15:07:21,879 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-28 15:07:22,079 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-28 15:07:22,281 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-28 15:07:22,478 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-28 15:07:22,685 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-28 15:07:22,887 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:07:23,094 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:07:23,314 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:07:23,523 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:07:23,728 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:07:23,933 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:07:24,133 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:07:24,326 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:07:24,527 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:07:24,722 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:07:24,919 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:07:25,106 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-28 15:07:25,299 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-28 15:07:28,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:28,314 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2020-10-28 15:07:28,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-28 15:07:28,315 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 80 [2020-10-28 15:07:28,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:28,316 INFO L225 Difference]: With dead ends: 90 [2020-10-28 15:07:28,316 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 15:07:28,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1352, Invalid=4500, Unknown=0, NotChecked=0, Total=5852 [2020-10-28 15:07:28,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 15:07:28,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2020-10-28 15:07:28,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 15:07:28,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2020-10-28 15:07:28,328 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2020-10-28 15:07:28,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:28,328 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2020-10-28 15:07:28,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 15:07:28,328 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2020-10-28 15:07:28,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-28 15:07:28,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:28,329 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:28,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 15:07:28,329 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:28,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:28,330 INFO L82 PathProgramCache]: Analyzing trace with hash 1118590686, now seen corresponding path program 33 times [2020-10-28 15:07:28,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:28,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883975759] [2020-10-28 15:07:28,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:28,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:28,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,708 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:28,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:29,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,603 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:30,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:32,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:33,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:33,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-10-28 15:07:33,355 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 35 [2020-10-28 15:07:33,355 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 15:07:33,355 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:33,355 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-28 15:07:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:33,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-28 15:07:33,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:35,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:35,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:35,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:35,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:35,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:35,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:35,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:07:35,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:35,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:35,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:35,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883975759] [2020-10-28 15:07:35,039 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:35,039 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-28 15:07:35,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163690925] [2020-10-28 15:07:35,040 INFO L461 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-28 15:07:35,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:35,040 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-28 15:07:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1560, Unknown=0, NotChecked=0, Total=1640 [2020-10-28 15:07:35,041 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand 41 states. [2020-10-28 15:07:35,344 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-28 15:07:35,565 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-28 15:07:35,776 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-28 15:07:35,980 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-28 15:07:36,185 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-28 15:07:36,392 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-28 15:07:36,599 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-28 15:07:36,816 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:07:37,030 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:07:37,238 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:07:37,445 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:07:37,656 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:07:37,868 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:07:38,085 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:07:38,295 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:07:38,493 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:07:38,695 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:07:38,888 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:07:39,083 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-28 15:07:42,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:42,390 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2020-10-28 15:07:42,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-28 15:07:42,391 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 82 [2020-10-28 15:07:42,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:42,392 INFO L225 Difference]: With dead ends: 92 [2020-10-28 15:07:42,393 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 15:07:42,394 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=1426, Invalid=4736, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 15:07:42,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 15:07:42,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2020-10-28 15:07:42,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-28 15:07:42,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2020-10-28 15:07:42,409 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2020-10-28 15:07:42,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:42,409 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2020-10-28 15:07:42,409 INFO L482 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-28 15:07:42,409 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2020-10-28 15:07:42,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2020-10-28 15:07:42,410 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:42,410 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:42,410 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 15:07:42,410 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:42,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash -626567876, now seen corresponding path program 34 times [2020-10-28 15:07:42,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:42,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1803766326] [2020-10-28 15:07:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:42,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:42,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:42,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,086 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,195 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,331 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,361 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,475 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:43,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:44,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:47,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:47,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 94 [2020-10-28 15:07:47,431 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 36 [2020-10-28 15:07:47,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 15:07:47,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:47,432 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:47,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-28 15:07:47,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:07:47,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-28 15:07:47,432 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:49,312 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:07:49,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:49,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:49,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:07:49,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:07:49,316 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:07:49,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 15:07:49,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:07:49,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:07:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:07:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:07:49,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:07:49,317 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:07:49,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:07:49,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1803766326] [2020-10-28 15:07:49,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:07:49,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-28 15:07:49,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670571631] [2020-10-28 15:07:49,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-28 15:07:49,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:07:49,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-28 15:07:49,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1640, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 15:07:49,330 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand 42 states. [2020-10-28 15:07:49,643 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2020-10-28 15:07:49,864 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-28 15:07:50,082 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-28 15:07:50,307 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-28 15:07:50,527 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-28 15:07:50,752 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-28 15:07:50,973 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-28 15:07:51,196 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-28 15:07:51,420 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:07:51,636 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:07:51,852 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:07:52,067 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:07:52,285 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:07:52,507 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:07:52,719 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:07:52,948 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:07:53,160 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:07:53,377 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:07:53,584 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:07:53,784 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-28 15:07:53,984 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-28 15:07:57,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:07:57,183 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2020-10-28 15:07:57,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-28 15:07:57,185 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 84 [2020-10-28 15:07:57,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:07:57,186 INFO L225 Difference]: With dead ends: 94 [2020-10-28 15:07:57,186 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 15:07:57,188 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1502, Invalid=4978, Unknown=0, NotChecked=0, Total=6480 [2020-10-28 15:07:57,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 15:07:57,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2020-10-28 15:07:57,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-28 15:07:57,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2020-10-28 15:07:57,199 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2020-10-28 15:07:57,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:07:57,200 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2020-10-28 15:07:57,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-28 15:07:57,200 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2020-10-28 15:07:57,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2020-10-28 15:07:57,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:07:57,201 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:07:57,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 15:07:57,201 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:07:57,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:07:57,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1608266778, now seen corresponding path program 35 times [2020-10-28 15:07:57,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:07:57,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [108317292] [2020-10-28 15:07:57,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:07:57,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:07:57,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,691 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,730 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,839 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:57,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:07:58,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:01,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:02,230 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:02,230 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-28 15:08:02,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 37 [2020-10-28 15:08:02,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 15:08:02,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:02,230 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:02,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 15:08:02,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 15:08:02,231 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-28 15:08:02,231 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:04,156 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 15:08:04,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:04,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:04,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 15:08:04,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 15:08:04,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 15:08:04,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 15:08:04,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 15:08:04,161 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 15:08:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 15:08:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 15:08:04,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 15:08:04,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 15:08:04,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 15:08:04,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [108317292] [2020-10-28 15:08:04,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 15:08:04,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 15:08:04,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131754584] [2020-10-28 15:08:04,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 15:08:04,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 15:08:04,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 15:08:04,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1722, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 15:08:04,176 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand 43 states. [2020-10-28 15:08:04,497 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 35 [2020-10-28 15:08:04,725 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 35 [2020-10-28 15:08:04,949 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 35 [2020-10-28 15:08:05,174 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 35 [2020-10-28 15:08:05,399 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 35 [2020-10-28 15:08:05,620 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 35 [2020-10-28 15:08:05,839 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 35 [2020-10-28 15:08:06,063 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 35 [2020-10-28 15:08:06,288 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 35 [2020-10-28 15:08:06,510 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 35 [2020-10-28 15:08:06,737 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 35 [2020-10-28 15:08:06,959 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 35 [2020-10-28 15:08:07,176 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 35 [2020-10-28 15:08:07,399 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 35 [2020-10-28 15:08:07,619 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 35 [2020-10-28 15:08:07,839 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 15:08:08,051 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 35 [2020-10-28 15:08:08,262 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 35 [2020-10-28 15:08:08,471 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 35 [2020-10-28 15:08:08,677 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 35 [2020-10-28 15:08:08,886 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 35 [2020-10-28 15:08:09,093 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 35 [2020-10-28 15:08:09,299 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 35 [2020-10-28 15:08:12,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 15:08:12,295 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2020-10-28 15:08:12,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-28 15:08:12,296 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 86 [2020-10-28 15:08:12,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 15:08:12,297 INFO L225 Difference]: With dead ends: 96 [2020-10-28 15:08:12,297 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 15:08:12,299 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1580, Invalid=5226, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 15:08:12,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 15:08:12,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-28 15:08:12,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 15:08:12,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2020-10-28 15:08:12,312 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2020-10-28 15:08:12,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 15:08:12,312 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2020-10-28 15:08:12,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 15:08:12,312 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2020-10-28 15:08:12,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2020-10-28 15:08:12,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 15:08:12,313 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 15:08:12,313 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 15:08:12,313 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 15:08:12,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 15:08:12,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1800721272, now seen corresponding path program 36 times [2020-10-28 15:08:12,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 15:08:12,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340255680] [2020-10-28 15:08:12,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 15:08:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 15:08:12,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 15:08:12,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking...