/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/forester-heap/sll-buckets-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:30:09,653 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:30:09,658 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:30:09,722 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:30:09,723 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:30:09,730 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:30:09,733 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:30:09,738 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:30:09,742 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:30:09,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:30:09,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:30:09,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:30:09,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:30:09,758 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:30:09,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:30:09,763 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:30:09,765 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:30:09,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:30:09,776 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:30:09,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:30:09,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:30:09,788 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:30:09,790 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:30:09,792 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:30:09,801 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:30:09,802 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:30:09,802 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:30:09,804 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:30:09,805 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:30:09,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:30:09,807 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:30:09,808 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:30:09,810 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:30:09,811 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:30:09,812 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:30:09,827 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:30:09,828 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:30:09,828 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:30:09,828 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:30:09,829 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:30:09,830 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:30:09,838 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 14:30:09,889 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:30:09,890 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:30:09,894 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:30:09,895 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:30:09,895 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:30:09,895 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:30:09,895 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:30:09,895 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:30:09,896 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:30:09,896 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:30:09,897 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:30:09,897 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:30:09,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:30:09,898 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:30:09,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:30:09,898 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:30:09,898 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:30:09,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:30:09,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:30:09,899 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:30:09,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:30:09,899 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:30:09,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:30:09,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:30:09,900 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:30:09,900 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:30:09,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:30:09,901 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:30:09,901 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:30:09,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:30:10,355 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:30:10,396 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:30:10,400 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:30:10,401 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:30:10,408 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:30:10,410 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-buckets-1.i [2020-10-28 14:30:10,505 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f88bc602/13edd9fe95514b69bdca449362d3a536/FLAGa5d1b61a7 [2020-10-28 14:30:11,451 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:30:11,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-buckets-1.i [2020-10-28 14:30:11,475 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f88bc602/13edd9fe95514b69bdca449362d3a536/FLAGa5d1b61a7 [2020-10-28 14:30:11,650 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/5f88bc602/13edd9fe95514b69bdca449362d3a536 [2020-10-28 14:30:11,654 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:30:11,662 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:30:11,667 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:30:11,667 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:30:11,672 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:30:11,674 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:30:11" (1/1) ... [2020-10-28 14:30:11,679 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@31447243 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:11, skipping insertion in model container [2020-10-28 14:30:11,679 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:30:11" (1/1) ... [2020-10-28 14:30:11,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:30:11,754 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:30:12,138 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:30:12,153 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:30:12,203 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:30:12,272 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:30:12,272 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12 WrapperNode [2020-10-28 14:30:12,272 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:30:12,274 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:30:12,274 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:30:12,274 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:30:12,288 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (1/1) ... [2020-10-28 14:30:12,288 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (1/1) ... [2020-10-28 14:30:12,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (1/1) ... [2020-10-28 14:30:12,307 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (1/1) ... [2020-10-28 14:30:12,329 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (1/1) ... [2020-10-28 14:30:12,338 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (1/1) ... [2020-10-28 14:30:12,343 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (1/1) ... [2020-10-28 14:30:12,351 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:30:12,352 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:30:12,352 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:30:12,352 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:30:12,353 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (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 14:30:12,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:30:12,456 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:30:12,457 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:30:12,457 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:30:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:30:12,458 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:30:12,459 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:30:12,459 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:30:12,459 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:30:12,459 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:30:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:30:12,460 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:30:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:30:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:30:12,461 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:30:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:30:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:30:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:30:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:30:12,462 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:30:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:30:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:30:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:30:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:30:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:30:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:30:12,463 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:30:12,464 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:30:12,464 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:30:12,464 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:30:12,464 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:30:12,464 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:30:12,464 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:30:12,464 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:30:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:30:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:30:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:30:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:30:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:30:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:30:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:30:12,465 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:30:12,466 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:30:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:30:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:30:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:30:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:30:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:30:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:30:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:30:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:30:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:30:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:30:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:30:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:30:12,470 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:30:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:30:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:30:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:30:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:30:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:30:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:30:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:30:12,471 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:30:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:30:12,472 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:30:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:30:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:30:12,474 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:30:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:30:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:30:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:30:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:30:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:30:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:30:12,475 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:30:12,476 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:30:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:30:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:30:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:30:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:30:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:30:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:30:12,477 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:30:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:30:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:30:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:30:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:30:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:30:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:30:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:30:12,478 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:30:12,479 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:30:12,479 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:30:12,479 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:30:12,479 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:30:12,479 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:30:12,496 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:30:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:30:12,501 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:30:12,502 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:30:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:30:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:30:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:30:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:30:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:30:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:30:12,503 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:30:13,378 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:30:13,378 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-10-28 14:30:13,380 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:30:13 BoogieIcfgContainer [2020-10-28 14:30:13,381 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:30:13,383 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:30:13,383 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:30:13,387 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:30:13,387 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:30:11" (1/3) ... [2020-10-28 14:30:13,388 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d066f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:30:13, skipping insertion in model container [2020-10-28 14:30:13,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:30:12" (2/3) ... [2020-10-28 14:30:13,389 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@19d066f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:30:13, skipping insertion in model container [2020-10-28 14:30:13,389 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:30:13" (3/3) ... [2020-10-28 14:30:13,391 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-1.i [2020-10-28 14:30:13,407 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:30:13,414 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:30:13,430 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:30:13,463 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:30:13,463 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:30:13,463 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:30:13,464 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:30:13,464 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:30:13,464 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:30:13,464 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:30:13,464 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:30:13,489 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-28 14:30:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-28 14:30:13,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:13,499 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:13,500 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:13,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:13,507 INFO L82 PathProgramCache]: Analyzing trace with hash -2031057720, now seen corresponding path program 1 times [2020-10-28 14:30:13,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:13,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1707837992] [2020-10-28 14:30:13,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:13,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:13,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:14,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:14,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:30:14,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:14,225 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 439 [2020-10-28 14:30:14,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:14,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:30:14,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:14,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:30:14,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-28 14:30:14,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:14,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:14,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:14,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:14,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:14,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:14,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:30:14,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:14,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:14,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:14,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:14,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:14,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:14,368 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 14:30:14,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1707837992] [2020-10-28 14:30:14,371 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:14,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 14:30:14,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023053972] [2020-10-28 14:30:14,377 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 14:30:14,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:14,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 14:30:14,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:30:14,396 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 5 states. [2020-10-28 14:30:14,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:14,731 INFO L93 Difference]: Finished difference Result 120 states and 208 transitions. [2020-10-28 14:30:14,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 14:30:14,733 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-28 14:30:14,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:14,743 INFO L225 Difference]: With dead ends: 120 [2020-10-28 14:30:14,743 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:30:14,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:30:14,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:30:14,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2020-10-28 14:30:14,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 14:30:14,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-28 14:30:14,795 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 14 [2020-10-28 14:30:14,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:14,795 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-28 14:30:14,795 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 14:30:14,795 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-28 14:30:14,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-28 14:30:14,796 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:14,797 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:14,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:30:14,797 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:14,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:14,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1948730651, now seen corresponding path program 1 times [2020-10-28 14:30:14,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:14,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15367438] [2020-10-28 14:30:14,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:14,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:14,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:14,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,238 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:15,239 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:30:15,239 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:15,239 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 412 [2020-10-28 14:30:15,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:15,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:15,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-28 14:30:15,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 14:30:15,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:15,299 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:15,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:15,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:15,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:15,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:15,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:15,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:15,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:15,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:15,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:15,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:15,315 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 14:30:15,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15367438] [2020-10-28 14:30:15,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:15,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:15,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937494885] [2020-10-28 14:30:15,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:15,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:15,319 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:15,319 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:15,319 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 4 states. [2020-10-28 14:30:15,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:15,566 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-28 14:30:15,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:30:15,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-28 14:30:15,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:15,568 INFO L225 Difference]: With dead ends: 51 [2020-10-28 14:30:15,568 INFO L226 Difference]: Without dead ends: 47 [2020-10-28 14:30:15,569 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:15,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-28 14:30:15,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-28 14:30:15,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-28 14:30:15,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-28 14:30:15,578 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 15 [2020-10-28 14:30:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:15,579 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-28 14:30:15,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:30:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-28 14:30:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:30:15,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:15,580 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:15,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:30:15,580 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:15,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:15,581 INFO L82 PathProgramCache]: Analyzing trace with hash 314866980, now seen corresponding path program 1 times [2020-10-28 14:30:15,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:15,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770659064] [2020-10-28 14:30:15,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:15,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:15,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,811 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:15,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:30:15,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:15,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 199 [2020-10-28 14:30:15,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:15,812 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:30:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:15,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:30:15,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:15,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:15,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:15,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:15,973 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:15,973 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:15,973 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:15,974 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:15,974 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:15,974 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:15,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:15,974 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:15,975 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:15,975 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:15,984 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 14:30:15,984 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770659064] [2020-10-28 14:30:15,984 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:15,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:30:15,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577032077] [2020-10-28 14:30:15,985 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:30:15,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:15,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:30:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:30:15,987 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 6 states. [2020-10-28 14:30:16,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:16,410 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-28 14:30:16,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:30:16,411 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-28 14:30:16,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:16,413 INFO L225 Difference]: With dead ends: 67 [2020-10-28 14:30:16,413 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 14:30:16,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:16,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 14:30:16,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-28 14:30:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 14:30:16,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-28 14:30:16,423 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 16 [2020-10-28 14:30:16,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:16,424 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-28 14:30:16,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:30:16,424 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-28 14:30:16,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-28 14:30:16,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:16,425 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:16,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:30:16,425 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:16,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:16,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1947134467, now seen corresponding path program 1 times [2020-10-28 14:30:16,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:16,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [15800022] [2020-10-28 14:30:16,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:16,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:16,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:16,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:16,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-28 14:30:16,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:16,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 63 [2020-10-28 14:30:16,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:16,522 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:16,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:30:16,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:30:16,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 14:30:16,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:16,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:16,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:16,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:16,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:16,579 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:16,579 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:16,579 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:16,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:16,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:16,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:16,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:16,584 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 14:30:16,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [15800022] [2020-10-28 14:30:16,584 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:16,585 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:30:16,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412831828] [2020-10-28 14:30:16,585 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:30:16,585 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:16,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:30:16,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:16,586 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2020-10-28 14:30:16,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:16,836 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-28 14:30:16,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 14:30:16,837 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-28 14:30:16,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:16,838 INFO L225 Difference]: With dead ends: 52 [2020-10-28 14:30:16,838 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 14:30:16,839 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:30:16,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 14:30:16,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-28 14:30:16,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-28 14:30:16,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-28 14:30:16,847 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 16 [2020-10-28 14:30:16,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:16,847 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-28 14:30:16,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:30:16,848 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-28 14:30:16,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-28 14:30:16,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:16,849 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:16,849 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:30:16,849 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:16,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:16,850 INFO L82 PathProgramCache]: Analyzing trace with hash 59150788, now seen corresponding path program 1 times [2020-10-28 14:30:16,850 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:16,850 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119919792] [2020-10-28 14:30:16,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:16,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:16,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:17,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:17,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-28 14:30:17,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:17,242 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 349 [2020-10-28 14:30:17,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:17,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:17,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:30:17,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:17,554 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:17,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:17,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:17,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:17,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:17,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:17,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:30:17,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:17,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:17,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:17,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:17,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:17,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:17,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:17,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119919792] [2020-10-28 14:30:17,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:17,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:30:17,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898830715] [2020-10-28 14:30:17,576 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:17,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:17,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:17,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:17,583 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 8 states. [2020-10-28 14:30:17,959 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-28 14:30:18,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:18,220 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-10-28 14:30:18,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:30:18,221 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-28 14:30:18,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:18,222 INFO L225 Difference]: With dead ends: 68 [2020-10-28 14:30:18,223 INFO L226 Difference]: Without dead ends: 55 [2020-10-28 14:30:18,223 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-28 14:30:18,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-28 14:30:18,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-28 14:30:18,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-28 14:30:18,231 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 21 [2020-10-28 14:30:18,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:18,232 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-28 14:30:18,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:18,232 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-28 14:30:18,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-28 14:30:18,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:18,233 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:18,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:30:18,233 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:18,234 INFO L82 PathProgramCache]: Analyzing trace with hash -465827442, now seen corresponding path program 1 times [2020-10-28 14:30:18,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:18,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1415184013] [2020-10-28 14:30:18,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:18,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:18,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:18,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:18,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:18,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:18,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-28 14:30:18,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:18,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 695 [2020-10-28 14:30:18,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:18,954 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:18,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:18,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:30:18,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:19,055 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:19,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:19,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:19,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:19,064 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:19,064 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:19,064 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:19,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:19,065 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:19,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:19,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:19,065 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:19,065 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:19,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:19,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1415184013] [2020-10-28 14:30:19,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:19,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:30:19,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251029427] [2020-10-28 14:30:19,076 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:19,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:19,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:19,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:19,077 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 8 states. [2020-10-28 14:30:19,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:19,763 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2020-10-28 14:30:19,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:30:19,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-28 14:30:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:19,766 INFO L225 Difference]: With dead ends: 103 [2020-10-28 14:30:19,766 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 14:30:19,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 14:30:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2020-10-28 14:30:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:30:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-28 14:30:19,789 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 22 [2020-10-28 14:30:19,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:19,789 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-28 14:30:19,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:19,790 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-28 14:30:19,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-28 14:30:19,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:19,791 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:19,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:30:19,792 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:19,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:19,793 INFO L82 PathProgramCache]: Analyzing trace with hash 311951251, now seen corresponding path program 2 times [2020-10-28 14:30:19,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:19,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1449221543] [2020-10-28 14:30:19,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:19,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:19,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:20,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:20,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:20,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:20,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-28 14:30:20,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:20,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1004 [2020-10-28 14:30:20,846 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:20,846 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:20,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:20,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:20,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:30:20,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:20,962 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:20,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:20,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:20,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:20,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:20,971 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:20,971 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:20,971 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:20,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:20,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:20,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:20,978 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:20,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1449221543] [2020-10-28 14:30:20,979 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:20,979 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:20,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188446164] [2020-10-28 14:30:20,980 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:20,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:20,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:20,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:20,981 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 9 states. [2020-10-28 14:30:21,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:21,719 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2020-10-28 14:30:21,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:21,725 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 24 [2020-10-28 14:30:21,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:21,727 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:30:21,727 INFO L226 Difference]: Without dead ends: 105 [2020-10-28 14:30:21,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-28 14:30:21,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 63. [2020-10-28 14:30:21,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 14:30:21,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-10-28 14:30:21,749 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 24 [2020-10-28 14:30:21,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:21,749 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-10-28 14:30:21,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:21,749 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-10-28 14:30:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:30:21,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:21,754 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:21,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:30:21,754 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:21,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:21,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1844994340, now seen corresponding path program 2 times [2020-10-28 14:30:21,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:21,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834646132] [2020-10-28 14:30:21,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:21,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:21,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:22,228 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:22,228 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:30:22,228 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:22,228 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 413 [2020-10-28 14:30:22,228 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:22,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:22,229 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:30:22,229 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:22,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:22,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:22,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:22,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:22,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:22,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:22,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:22,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:22,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:22,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:22,577 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 14:30:22,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834646132] [2020-10-28 14:30:22,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:22,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:22,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865307506] [2020-10-28 14:30:22,578 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:22,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:22,580 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:22,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:22,581 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 10 states. [2020-10-28 14:30:23,049 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-28 14:30:23,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:23,689 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-10-28 14:30:23,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:23,690 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-28 14:30:23,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:23,691 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:30:23,691 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 14:30:23,691 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:23,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 14:30:23,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2020-10-28 14:30:23,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:30:23,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 82 transitions. [2020-10-28 14:30:23,702 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 82 transitions. Word has length 26 [2020-10-28 14:30:23,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:23,705 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 82 transitions. [2020-10-28 14:30:23,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:23,705 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 82 transitions. [2020-10-28 14:30:23,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-28 14:30:23,706 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:23,706 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:23,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:30:23,707 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:23,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:23,707 INFO L82 PathProgramCache]: Analyzing trace with hash 432965720, now seen corresponding path program 3 times [2020-10-28 14:30:23,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:23,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [900339284] [2020-10-28 14:30:23,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:23,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:24,014 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:24,015 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-28 14:30:24,015 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:24,015 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 269 [2020-10-28 14:30:24,015 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:24,015 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:24,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:24,015 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:24,016 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:30:24,016 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:24,170 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:24,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:24,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:24,178 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:24,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:24,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:24,179 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:24,179 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:24,179 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:24,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:24,180 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:24,185 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 14:30:24,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [900339284] [2020-10-28 14:30:24,190 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:24,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:30:24,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846713251] [2020-10-28 14:30:24,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:24,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:24,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:24,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:24,193 INFO L87 Difference]: Start difference. First operand 68 states and 82 transitions. Second operand 8 states. [2020-10-28 14:30:24,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:24,832 INFO L93 Difference]: Finished difference Result 151 states and 187 transitions. [2020-10-28 14:30:24,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:30:24,833 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 26 [2020-10-28 14:30:24,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:24,834 INFO L225 Difference]: With dead ends: 151 [2020-10-28 14:30:24,835 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 14:30:24,836 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:24,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 14:30:24,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 82. [2020-10-28 14:30:24,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:30:24,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-10-28 14:30:24,877 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 26 [2020-10-28 14:30:24,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:24,878 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-10-28 14:30:24,878 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:24,878 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-10-28 14:30:24,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:30:24,881 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:24,882 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:24,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:30:24,882 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:24,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:24,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1301750367, now seen corresponding path program 1 times [2020-10-28 14:30:24,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:24,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035408016] [2020-10-28 14:30:24,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:24,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:24,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:25,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:25,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:30:25,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:25,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 261 [2020-10-28 14:30:25,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:25,181 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:25,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:30:25,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:25,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:30:25,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:25,375 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:25,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:25,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:25,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:25,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:25,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:25,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 14:30:25,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:25,392 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:25,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:25,404 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:30:25,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035408016] [2020-10-28 14:30:25,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:25,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:25,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731794592] [2020-10-28 14:30:25,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:25,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:25,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:25,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:25,407 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 9 states. [2020-10-28 14:30:26,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:26,598 INFO L93 Difference]: Finished difference Result 165 states and 203 transitions. [2020-10-28 14:30:26,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:26,599 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-28 14:30:26,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:26,600 INFO L225 Difference]: With dead ends: 165 [2020-10-28 14:30:26,600 INFO L226 Difference]: Without dead ends: 129 [2020-10-28 14:30:26,601 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:30:26,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-28 14:30:26,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 91. [2020-10-28 14:30:26,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-28 14:30:26,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 109 transitions. [2020-10-28 14:30:26,622 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 109 transitions. Word has length 27 [2020-10-28 14:30:26,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:26,625 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 109 transitions. [2020-10-28 14:30:26,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:26,625 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 109 transitions. [2020-10-28 14:30:26,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:30:26,629 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:26,629 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:26,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:30:26,630 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:26,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:26,630 INFO L82 PathProgramCache]: Analyzing trace with hash -692394339, now seen corresponding path program 1 times [2020-10-28 14:30:26,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:26,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1627857430] [2020-10-28 14:30:26,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:26,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:26,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:26,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 14:30:26,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:26,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 308 [2020-10-28 14:30:26,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:26,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:26,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:30:26,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:27,195 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:27,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:27,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:27,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:27,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:27,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:27,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:27,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:27,205 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:27,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:27,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:27,222 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:27,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1627857430] [2020-10-28 14:30:27,223 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:27,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:27,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371462039] [2020-10-28 14:30:27,224 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:27,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:27,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:27,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:27,226 INFO L87 Difference]: Start difference. First operand 91 states and 109 transitions. Second operand 10 states. [2020-10-28 14:30:28,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:28,614 INFO L93 Difference]: Finished difference Result 168 states and 205 transitions. [2020-10-28 14:30:28,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:28,614 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-28 14:30:28,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:28,616 INFO L225 Difference]: With dead ends: 168 [2020-10-28 14:30:28,616 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 14:30:28,617 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:28,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 14:30:28,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 89. [2020-10-28 14:30:28,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 14:30:28,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 106 transitions. [2020-10-28 14:30:28,627 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 106 transitions. Word has length 27 [2020-10-28 14:30:28,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:28,627 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 106 transitions. [2020-10-28 14:30:28,627 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:28,627 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 106 transitions. [2020-10-28 14:30:28,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:30:28,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:28,628 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:28,628 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:30:28,629 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:28,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:28,629 INFO L82 PathProgramCache]: Analyzing trace with hash 95128516, now seen corresponding path program 1 times [2020-10-28 14:30:28,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:28,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070725449] [2020-10-28 14:30:28,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:28,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:28,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:29,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:29,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-28 14:30:29,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:29,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-28 14:30:29,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:29,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:29,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:30:29,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:29,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:30:29,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:30:29,883 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 31 [2020-10-28 14:30:30,193 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:30,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:30,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:30,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:30,201 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:30,201 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:30,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:30,202 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:30,202 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:30,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:30,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:30,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070725449] [2020-10-28 14:30:30,215 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:30,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:30:30,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898965454] [2020-10-28 14:30:30,220 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:30:30,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:30,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:30:30,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:30,221 INFO L87 Difference]: Start difference. First operand 89 states and 106 transitions. Second operand 13 states. [2020-10-28 14:30:31,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:31,407 INFO L93 Difference]: Finished difference Result 137 states and 167 transitions. [2020-10-28 14:30:31,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:30:31,409 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-28 14:30:31,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:31,410 INFO L225 Difference]: With dead ends: 137 [2020-10-28 14:30:31,410 INFO L226 Difference]: Without dead ends: 133 [2020-10-28 14:30:31,411 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:30:31,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-28 14:30:31,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 102. [2020-10-28 14:30:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 14:30:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 123 transitions. [2020-10-28 14:30:31,423 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 123 transitions. Word has length 30 [2020-10-28 14:30:31,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:31,424 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 123 transitions. [2020-10-28 14:30:31,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:30:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 123 transitions. [2020-10-28 14:30:31,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:30:31,425 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:31,425 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:31,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:30:31,425 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:31,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:31,426 INFO L82 PathProgramCache]: Analyzing trace with hash -1054790204, now seen corresponding path program 3 times [2020-10-28 14:30:31,426 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:31,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577131886] [2020-10-28 14:30:31,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:31,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:31,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:31,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:30:31,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:31,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 417 [2020-10-28 14:30:31,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:31,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:31,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:30:31,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:32,278 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:32,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:32,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:32,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:32,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:32,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:32,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:30:32,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:32,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:32,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:32,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:32,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:32,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577131886] [2020-10-28 14:30:32,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:32,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:32,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294204656] [2020-10-28 14:30:32,301 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:32,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:32,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:32,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:32,302 INFO L87 Difference]: Start difference. First operand 102 states and 123 transitions. Second operand 10 states. [2020-10-28 14:30:32,625 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-28 14:30:33,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:33,019 INFO L93 Difference]: Finished difference Result 119 states and 141 transitions. [2020-10-28 14:30:33,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:30:33,020 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-28 14:30:33,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:33,021 INFO L225 Difference]: With dead ends: 119 [2020-10-28 14:30:33,022 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:30:33,023 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:30:33,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:30:33,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2020-10-28 14:30:33,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 14:30:33,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 109 transitions. [2020-10-28 14:30:33,032 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 109 transitions. Word has length 31 [2020-10-28 14:30:33,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:33,032 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 109 transitions. [2020-10-28 14:30:33,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:33,032 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 109 transitions. [2020-10-28 14:30:33,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:30:33,033 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:33,033 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:33,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:30:33,033 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:33,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:33,034 INFO L82 PathProgramCache]: Analyzing trace with hash -947612464, now seen corresponding path program 1 times [2020-10-28 14:30:33,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:33,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [883332878] [2020-10-28 14:30:33,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:33,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:33,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:33,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:33,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:34,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:34,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:30:34,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:34,790 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1719 [2020-10-28 14:30:34,790 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:34,790 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:34,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:34,790 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:34,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:30:34,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:35,284 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:35,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:35,292 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:35,292 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:35,292 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:35,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:35,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:35,292 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:35,293 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:35,293 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:35,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:35,307 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [883332878] [2020-10-28 14:30:35,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:35,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:30:35,308 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117552943] [2020-10-28 14:30:35,308 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:30:35,308 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:35,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:30:35,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:35,309 INFO L87 Difference]: Start difference. First operand 89 states and 109 transitions. Second operand 11 states. [2020-10-28 14:30:35,931 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-28 14:30:36,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:36,642 INFO L93 Difference]: Finished difference Result 152 states and 188 transitions. [2020-10-28 14:30:36,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:30:36,643 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-28 14:30:36,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:36,644 INFO L225 Difference]: With dead ends: 152 [2020-10-28 14:30:36,645 INFO L226 Difference]: Without dead ends: 148 [2020-10-28 14:30:36,646 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:30:36,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-28 14:30:36,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 103. [2020-10-28 14:30:36,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-28 14:30:36,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 125 transitions. [2020-10-28 14:30:36,668 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 125 transitions. Word has length 33 [2020-10-28 14:30:36,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:36,669 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 125 transitions. [2020-10-28 14:30:36,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:30:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 125 transitions. [2020-10-28 14:30:36,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-28 14:30:36,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:36,671 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:36,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:30:36,671 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:36,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:36,671 INFO L82 PathProgramCache]: Analyzing trace with hash -2134874736, now seen corresponding path program 1 times [2020-10-28 14:30:36,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:36,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44155526] [2020-10-28 14:30:36,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:36,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:36,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:36,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:38,188 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:38,188 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 14:30:38,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:38,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1481 [2020-10-28 14:30:38,189 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:38,189 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:38,189 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:30:38,190 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:38,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:38,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:38,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:38,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:38,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:38,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:38,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:38,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:38,367 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:38,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:38,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:38,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:38,378 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 14:30:38,378 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44155526] [2020-10-28 14:30:38,379 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:38,379 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:38,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011225238] [2020-10-28 14:30:38,379 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:38,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:38,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:38,380 INFO L87 Difference]: Start difference. First operand 103 states and 125 transitions. Second operand 10 states. [2020-10-28 14:30:39,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:39,052 INFO L93 Difference]: Finished difference Result 164 states and 202 transitions. [2020-10-28 14:30:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:30:39,052 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-28 14:30:39,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:39,054 INFO L225 Difference]: With dead ends: 164 [2020-10-28 14:30:39,054 INFO L226 Difference]: Without dead ends: 151 [2020-10-28 14:30:39,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:30:39,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-28 14:30:39,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 126. [2020-10-28 14:30:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 14:30:39,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 155 transitions. [2020-10-28 14:30:39,069 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 155 transitions. Word has length 33 [2020-10-28 14:30:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:39,069 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 155 transitions. [2020-10-28 14:30:39,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:39,069 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 155 transitions. [2020-10-28 14:30:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:30:39,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:39,070 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:39,070 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:30:39,070 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:39,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:39,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1897728791, now seen corresponding path program 1 times [2020-10-28 14:30:39,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:39,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [591990529] [2020-10-28 14:30:39,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:39,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:39,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:39,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,360 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:40,360 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:30:40,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:30:40,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-28 14:30:40,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:40,361 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:40,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:40,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:40,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:30:40,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:40,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:40,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:40,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:40,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:40,772 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:40,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:40,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:40,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:40,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:40,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:40,773 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:40,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:40,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:40,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [591990529] [2020-10-28 14:30:40,788 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:40,788 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:30:40,789 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086366002] [2020-10-28 14:30:40,789 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:30:40,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:40,790 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:30:40,790 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:30:40,790 INFO L87 Difference]: Start difference. First operand 126 states and 155 transitions. Second operand 10 states. [2020-10-28 14:30:41,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:41,887 INFO L93 Difference]: Finished difference Result 192 states and 238 transitions. [2020-10-28 14:30:41,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:30:41,888 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 34 [2020-10-28 14:30:41,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:41,889 INFO L225 Difference]: With dead ends: 192 [2020-10-28 14:30:41,889 INFO L226 Difference]: Without dead ends: 177 [2020-10-28 14:30:41,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=104, Invalid=276, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:30:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-28 14:30:41,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 137. [2020-10-28 14:30:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-28 14:30:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 170 transitions. [2020-10-28 14:30:41,910 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 170 transitions. Word has length 34 [2020-10-28 14:30:41,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:41,910 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 170 transitions. [2020-10-28 14:30:41,910 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:30:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 170 transitions. [2020-10-28 14:30:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:30:41,911 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:41,911 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:41,912 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:30:41,912 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:41,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:41,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1109416156, now seen corresponding path program 1 times [2020-10-28 14:30:41,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:41,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976706900] [2020-10-28 14:30:41,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:41,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:42,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:42,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:42,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:42,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:43,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,769 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:45,769 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:30:45,769 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:30:45,769 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3827 [2020-10-28 14:30:45,770 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:45,770 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:45,770 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:45,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:30:45,771 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:30:45,771 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:30:45,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:45,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:45,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:45,889 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:45,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:45,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:45,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:45,890 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:45,890 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:45,890 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:45,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:45,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:45,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:45,896 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:45,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976706900] [2020-10-28 14:30:45,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:45,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:30:45,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789762330] [2020-10-28 14:30:45,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:30:45,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:45,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:30:45,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:30:45,903 INFO L87 Difference]: Start difference. First operand 137 states and 170 transitions. Second operand 7 states. [2020-10-28 14:30:46,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:46,361 INFO L93 Difference]: Finished difference Result 169 states and 210 transitions. [2020-10-28 14:30:46,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:30:46,361 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 35 [2020-10-28 14:30:46,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:46,363 INFO L225 Difference]: With dead ends: 169 [2020-10-28 14:30:46,364 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 14:30:46,364 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:46,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 14:30:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 142. [2020-10-28 14:30:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-28 14:30:46,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 176 transitions. [2020-10-28 14:30:46,379 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 176 transitions. Word has length 35 [2020-10-28 14:30:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:46,380 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 176 transitions. [2020-10-28 14:30:46,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:30:46,380 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 176 transitions. [2020-10-28 14:30:46,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:30:46,380 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:46,381 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:46,381 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:30:46,381 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:46,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:46,382 INFO L82 PathProgramCache]: Analyzing trace with hash 640155104, now seen corresponding path program 1 times [2020-10-28 14:30:46,382 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:46,382 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [203278333] [2020-10-28 14:30:46,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:46,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:46,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:46,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:46,836 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:46,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:30:46,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:46,837 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-10-28 14:30:46,837 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:46,837 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:30:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:46,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:30:46,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:47,260 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:47,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:47,267 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:47,267 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:47,267 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:47,267 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:30:47,268 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:47,268 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:47,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:47,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:47,268 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:47,268 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:47,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [203278333] [2020-10-28 14:30:47,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:47,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:47,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412632631] [2020-10-28 14:30:47,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:47,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:47,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:47,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:47,283 INFO L87 Difference]: Start difference. First operand 142 states and 176 transitions. Second operand 9 states. [2020-10-28 14:30:47,587 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-28 14:30:48,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:48,340 INFO L93 Difference]: Finished difference Result 203 states and 256 transitions. [2020-10-28 14:30:48,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:30:48,341 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 35 [2020-10-28 14:30:48,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:48,342 INFO L225 Difference]: With dead ends: 203 [2020-10-28 14:30:48,343 INFO L226 Difference]: Without dead ends: 190 [2020-10-28 14:30:48,344 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:30:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-28 14:30:48,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 169. [2020-10-28 14:30:48,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 14:30:48,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 211 transitions. [2020-10-28 14:30:48,371 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 211 transitions. Word has length 35 [2020-10-28 14:30:48,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:48,372 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 211 transitions. [2020-10-28 14:30:48,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:48,372 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 211 transitions. [2020-10-28 14:30:48,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:30:48,373 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:48,373 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:48,373 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:30:48,373 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:48,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:48,374 INFO L82 PathProgramCache]: Analyzing trace with hash 1577052627, now seen corresponding path program 1 times [2020-10-28 14:30:48,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:48,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [928134587] [2020-10-28 14:30:48,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:48,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:48,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:49,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:49,659 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:30:49,659 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:49,659 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1256 [2020-10-28 14:30:49,659 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:49,659 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:49,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:49,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:49,660 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:30:49,660 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:50,164 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2020-10-28 14:30:50,632 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:50,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:50,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:50,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:50,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:50,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:50,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:30:50,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:50,642 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:50,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:50,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:50,659 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:30:50,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [928134587] [2020-10-28 14:30:50,659 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:50,659 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:50,659 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55530577] [2020-10-28 14:30:50,661 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:50,661 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:50,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:50,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:50,663 INFO L87 Difference]: Start difference. First operand 169 states and 211 transitions. Second operand 12 states. [2020-10-28 14:30:51,029 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-28 14:30:51,281 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-28 14:30:51,424 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 44 [2020-10-28 14:30:51,602 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-28 14:30:51,823 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-28 14:30:52,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:52,670 INFO L93 Difference]: Finished difference Result 211 states and 264 transitions. [2020-10-28 14:30:52,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:30:52,675 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-28 14:30:52,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:52,677 INFO L225 Difference]: With dead ends: 211 [2020-10-28 14:30:52,677 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 14:30:52,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:30:52,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 14:30:52,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 169. [2020-10-28 14:30:52,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-28 14:30:52,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 211 transitions. [2020-10-28 14:30:52,701 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 211 transitions. Word has length 35 [2020-10-28 14:30:52,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:52,701 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 211 transitions. [2020-10-28 14:30:52,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:52,701 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 211 transitions. [2020-10-28 14:30:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:30:52,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:52,702 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:52,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:30:52,703 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:52,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:52,703 INFO L82 PathProgramCache]: Analyzing trace with hash -1926754748, now seen corresponding path program 1 times [2020-10-28 14:30:52,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:52,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730947469] [2020-10-28 14:30:52,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:52,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:52,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:52,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:53,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:53,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:30:53,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:53,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 746 [2020-10-28 14:30:53,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:53,488 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:53,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:30:53,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:53,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:30:53,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:53,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:53,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:53,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:53,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:53,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:53,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:53,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:53,601 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:53,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:53,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:53,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:53,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:53,608 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:30:53,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730947469] [2020-10-28 14:30:53,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:30:53,608 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:30:53,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734712302] [2020-10-28 14:30:53,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:30:53,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:53,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:30:53,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:30:53,610 INFO L87 Difference]: Start difference. First operand 169 states and 211 transitions. Second operand 8 states. [2020-10-28 14:30:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:54,032 INFO L93 Difference]: Finished difference Result 234 states and 292 transitions. [2020-10-28 14:30:54,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:30:54,033 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 36 [2020-10-28 14:30:54,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:54,035 INFO L225 Difference]: With dead ends: 234 [2020-10-28 14:30:54,035 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 14:30:54,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:30:54,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 14:30:54,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-28 14:30:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 14:30:54,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 191 transitions. [2020-10-28 14:30:54,052 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 191 transitions. Word has length 36 [2020-10-28 14:30:54,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:54,052 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 191 transitions. [2020-10-28 14:30:54,052 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:30:54,053 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 191 transitions. [2020-10-28 14:30:54,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:30:54,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:54,053 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:54,053 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:30:54,054 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:54,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:54,054 INFO L82 PathProgramCache]: Analyzing trace with hash -420358268, now seen corresponding path program 1 times [2020-10-28 14:30:54,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:54,054 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722575588] [2020-10-28 14:30:54,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:54,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:54,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:54,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:54,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-28 14:30:54,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:30:54,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 884 [2020-10-28 14:30:54,963 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:54,963 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:30:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:54,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:30:54,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:55,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:55,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:55,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:55,594 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:55,594 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:55,594 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:55,594 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:30:55,594 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:55,594 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:55,595 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:55,595 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:55,608 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 14:30:55,608 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722575588] [2020-10-28 14:30:55,608 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:55,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:30:55,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571916086] [2020-10-28 14:30:55,609 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:30:55,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:55,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:30:55,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:55,610 INFO L87 Difference]: Start difference. First operand 156 states and 191 transitions. Second operand 12 states. [2020-10-28 14:30:55,847 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 56 [2020-10-28 14:30:56,015 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 56 [2020-10-28 14:30:56,322 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-28 14:30:56,512 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2020-10-28 14:30:57,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:57,456 INFO L93 Difference]: Finished difference Result 197 states and 242 transitions. [2020-10-28 14:30:57,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:30:57,456 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 36 [2020-10-28 14:30:57,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:57,468 INFO L225 Difference]: With dead ends: 197 [2020-10-28 14:30:57,468 INFO L226 Difference]: Without dead ends: 179 [2020-10-28 14:30:57,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:30:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-28 14:30:57,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 159. [2020-10-28 14:30:57,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-28 14:30:57,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 195 transitions. [2020-10-28 14:30:57,486 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 195 transitions. Word has length 36 [2020-10-28 14:30:57,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:57,487 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 195 transitions. [2020-10-28 14:30:57,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:30:57,487 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 195 transitions. [2020-10-28 14:30:57,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:30:57,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:57,488 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:57,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:30:57,488 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:57,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:57,488 INFO L82 PathProgramCache]: Analyzing trace with hash -530449291, now seen corresponding path program 1 times [2020-10-28 14:30:57,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:57,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1916365448] [2020-10-28 14:30:57,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:57,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:57,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:57,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-28 14:30:57,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:57,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 333 [2020-10-28 14:30:57,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:57,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:57,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:30:57,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:30:57,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:30:57,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:30:57,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:57,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:57,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:30:57,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:30:57,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:30:57,952 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:30:57,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:30:57,952 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:30:57,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:30:57,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:30:57,952 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:30:57,953 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:30:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:30:57,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1916365448] [2020-10-28 14:30:57,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:30:57,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:30:57,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320869474] [2020-10-28 14:30:57,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:30:57,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:30:57,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:30:57,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:30:57,966 INFO L87 Difference]: Start difference. First operand 159 states and 195 transitions. Second operand 9 states. [2020-10-28 14:30:58,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:30:58,517 INFO L93 Difference]: Finished difference Result 213 states and 264 transitions. [2020-10-28 14:30:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:30:58,527 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 37 [2020-10-28 14:30:58,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:30:58,529 INFO L225 Difference]: With dead ends: 213 [2020-10-28 14:30:58,529 INFO L226 Difference]: Without dead ends: 209 [2020-10-28 14:30:58,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:30:58,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-28 14:30:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 162. [2020-10-28 14:30:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 14:30:58,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 198 transitions. [2020-10-28 14:30:58,564 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 198 transitions. Word has length 37 [2020-10-28 14:30:58,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:30:58,564 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 198 transitions. [2020-10-28 14:30:58,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:30:58,564 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 198 transitions. [2020-10-28 14:30:58,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:30:58,565 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:30:58,565 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:30:58,565 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:30:58,565 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:30:58,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:30:58,566 INFO L82 PathProgramCache]: Analyzing trace with hash -1224274728, now seen corresponding path program 1 times [2020-10-28 14:30:58,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:30:58,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584407257] [2020-10-28 14:30:58,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:30:58,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:30:58,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:30:59,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:00,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:00,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:31:00,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:00,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1788 [2020-10-28 14:31:00,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:00,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:00,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:31:00,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:00,832 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 52 [2020-10-28 14:31:00,984 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 50 [2020-10-28 14:31:01,478 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 83 [2020-10-28 14:31:01,668 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-28 14:31:01,861 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 41 [2020-10-28 14:31:02,292 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:02,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:02,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:02,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:02,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:02,322 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:31:02,322 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584407257] [2020-10-28 14:31:02,323 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:02,323 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:02,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865217243] [2020-10-28 14:31:02,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:02,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:02,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:02,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:02,324 INFO L87 Difference]: Start difference. First operand 162 states and 198 transitions. Second operand 14 states. [2020-10-28 14:31:03,047 WARN L193 SmtUtils]: Spent 393.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 93 [2020-10-28 14:31:03,231 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-28 14:31:04,014 WARN L193 SmtUtils]: Spent 705.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 113 [2020-10-28 14:31:04,173 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-28 14:31:04,721 WARN L193 SmtUtils]: Spent 464.00 ms on a formula simplification. DAG size of input: 179 DAG size of output: 100 [2020-10-28 14:31:05,042 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 75 [2020-10-28 14:31:05,240 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 71 [2020-10-28 14:31:05,816 WARN L193 SmtUtils]: Spent 398.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 119 [2020-10-28 14:31:06,301 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 89 [2020-10-28 14:31:06,610 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-10-28 14:31:07,051 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 108 [2020-10-28 14:31:07,266 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-28 14:31:07,646 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-28 14:31:08,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:08,179 INFO L93 Difference]: Finished difference Result 203 states and 246 transitions. [2020-10-28 14:31:08,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:31:08,180 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-28 14:31:08,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:08,181 INFO L225 Difference]: With dead ends: 203 [2020-10-28 14:31:08,181 INFO L226 Difference]: Without dead ends: 199 [2020-10-28 14:31:08,182 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:31:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-28 14:31:08,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 178. [2020-10-28 14:31:08,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-28 14:31:08,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 217 transitions. [2020-10-28 14:31:08,208 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 217 transitions. Word has length 38 [2020-10-28 14:31:08,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:08,209 INFO L481 AbstractCegarLoop]: Abstraction has 178 states and 217 transitions. [2020-10-28 14:31:08,209 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:08,209 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 217 transitions. [2020-10-28 14:31:08,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:31:08,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:08,210 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:08,210 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:31:08,210 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:08,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:08,211 INFO L82 PathProgramCache]: Analyzing trace with hash 487110175, now seen corresponding path program 1 times [2020-10-28 14:31:08,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:08,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499761186] [2020-10-28 14:31:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:08,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:08,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:08,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:08,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:31:08,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:08,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 380 [2020-10-28 14:31:08,622 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:08,622 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:08,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:31:08,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:08,775 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:08,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:08,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:08,781 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:08,781 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:08,781 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:08,781 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:08,782 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:08,782 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:08,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:08,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:08,782 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:08,782 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:08,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:31:08,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499761186] [2020-10-28 14:31:08,794 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:08,794 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:08,794 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522034657] [2020-10-28 14:31:08,794 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:08,794 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:08,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:08,795 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:08,795 INFO L87 Difference]: Start difference. First operand 178 states and 217 transitions. Second operand 9 states. [2020-10-28 14:31:09,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:09,378 INFO L93 Difference]: Finished difference Result 244 states and 300 transitions. [2020-10-28 14:31:09,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:31:09,379 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-28 14:31:09,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:09,380 INFO L225 Difference]: With dead ends: 244 [2020-10-28 14:31:09,380 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 14:31:09,381 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:09,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 14:31:09,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2020-10-28 14:31:09,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 175 states. [2020-10-28 14:31:09,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 211 transitions. [2020-10-28 14:31:09,404 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 211 transitions. Word has length 38 [2020-10-28 14:31:09,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:09,404 INFO L481 AbstractCegarLoop]: Abstraction has 175 states and 211 transitions. [2020-10-28 14:31:09,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:09,404 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 211 transitions. [2020-10-28 14:31:09,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:31:09,405 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:09,405 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:09,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:31:09,405 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:09,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:09,406 INFO L82 PathProgramCache]: Analyzing trace with hash 161928666, now seen corresponding path program 1 times [2020-10-28 14:31:09,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:09,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [91051569] [2020-10-28 14:31:09,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:09,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:09,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:09,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,745 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:10,745 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:31:10,746 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:10,746 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1308 [2020-10-28 14:31:10,746 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:10,746 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:31:10,746 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:10,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:31:10,747 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:10,886 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:10,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:10,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:10,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:10,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:10,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:10,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:10,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:10,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:10,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:10,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:10,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:31:10,900 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [91051569] [2020-10-28 14:31:10,900 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:10,900 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:31:10,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87754016] [2020-10-28 14:31:10,901 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:31:10,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:10,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:31:10,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:31:10,902 INFO L87 Difference]: Start difference. First operand 175 states and 211 transitions. Second operand 9 states. [2020-10-28 14:31:11,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:11,761 INFO L93 Difference]: Finished difference Result 248 states and 302 transitions. [2020-10-28 14:31:11,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:31:11,763 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 38 [2020-10-28 14:31:11,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:11,764 INFO L225 Difference]: With dead ends: 248 [2020-10-28 14:31:11,764 INFO L226 Difference]: Without dead ends: 175 [2020-10-28 14:31:11,765 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:11,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-28 14:31:11,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 171. [2020-10-28 14:31:11,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-28 14:31:11,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 206 transitions. [2020-10-28 14:31:11,787 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 206 transitions. Word has length 38 [2020-10-28 14:31:11,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:11,787 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 206 transitions. [2020-10-28 14:31:11,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:31:11,788 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 206 transitions. [2020-10-28 14:31:11,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:31:11,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:11,789 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:11,789 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:31:11,789 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:11,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:11,789 INFO L82 PathProgramCache]: Analyzing trace with hash -915257247, now seen corresponding path program 1 times [2020-10-28 14:31:11,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:11,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [498642908] [2020-10-28 14:31:11,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:11,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:11,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:11,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:12,619 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:12,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:31:12,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:12,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 784 [2020-10-28 14:31:12,619 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:12,620 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:12,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:12,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:12,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:31:12,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:13,302 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:13,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:13,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:13,307 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:13,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:13,319 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:13,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [498642908] [2020-10-28 14:31:13,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:13,320 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:13,320 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755756005] [2020-10-28 14:31:13,320 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:13,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:13,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:13,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:13,321 INFO L87 Difference]: Start difference. First operand 171 states and 206 transitions. Second operand 13 states. [2020-10-28 14:31:13,573 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-28 14:31:13,750 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-28 14:31:13,886 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2020-10-28 14:31:14,050 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 55 [2020-10-28 14:31:14,264 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 58 [2020-10-28 14:31:14,438 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 14:31:15,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:15,353 INFO L93 Difference]: Finished difference Result 211 states and 255 transitions. [2020-10-28 14:31:15,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:31:15,353 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 38 [2020-10-28 14:31:15,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:15,354 INFO L225 Difference]: With dead ends: 211 [2020-10-28 14:31:15,354 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 14:31:15,355 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=139, Invalid=461, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:31:15,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 14:31:15,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 174. [2020-10-28 14:31:15,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 14:31:15,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 210 transitions. [2020-10-28 14:31:15,378 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 210 transitions. Word has length 38 [2020-10-28 14:31:15,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:15,379 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 210 transitions. [2020-10-28 14:31:15,379 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:15,379 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 210 transitions. [2020-10-28 14:31:15,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:31:15,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:15,380 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:15,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:31:15,380 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:15,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:15,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1660103494, now seen corresponding path program 2 times [2020-10-28 14:31:15,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:15,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345461600] [2020-10-28 14:31:15,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:15,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:15,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:15,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:15,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:15,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:15,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:16,844 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:16,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:31:16,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:31:16,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1439 [2020-10-28 14:31:16,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:16,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:16,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:31:16,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:17,186 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-10-28 14:31:17,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:17,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:17,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:17,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:17,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:17,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:17,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:17,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:17,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:17,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:17,416 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:17,417 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345461600] [2020-10-28 14:31:17,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:17,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:17,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502105232] [2020-10-28 14:31:17,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:17,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:17,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:17,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:17,424 INFO L87 Difference]: Start difference. First operand 174 states and 210 transitions. Second operand 13 states. [2020-10-28 14:31:17,842 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-28 14:31:18,075 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-28 14:31:18,425 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-28 14:31:18,638 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-28 14:31:18,823 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-28 14:31:19,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:19,454 INFO L93 Difference]: Finished difference Result 275 states and 340 transitions. [2020-10-28 14:31:19,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:31:19,455 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-28 14:31:19,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:19,457 INFO L225 Difference]: With dead ends: 275 [2020-10-28 14:31:19,457 INFO L226 Difference]: Without dead ends: 271 [2020-10-28 14:31:19,457 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:31:19,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 271 states. [2020-10-28 14:31:19,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 271 to 204. [2020-10-28 14:31:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 14:31:19,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 252 transitions. [2020-10-28 14:31:19,491 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 252 transitions. Word has length 39 [2020-10-28 14:31:19,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:19,491 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 252 transitions. [2020-10-28 14:31:19,491 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:19,491 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 252 transitions. [2020-10-28 14:31:19,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:31:19,492 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:19,493 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:19,493 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:31:19,494 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:19,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:19,495 INFO L82 PathProgramCache]: Analyzing trace with hash -80823691, now seen corresponding path program 2 times [2020-10-28 14:31:19,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:19,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [919554398] [2020-10-28 14:31:19,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:19,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:19,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:19,846 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:21,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:21,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:31:21,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:21,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2341 [2020-10-28 14:31:21,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:21,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:21,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:31:21,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:22,422 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 72 [2020-10-28 14:31:22,640 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-28 14:31:22,856 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 60 [2020-10-28 14:31:23,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:23,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:23,212 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:23,213 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:23,213 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:23,213 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:23,213 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:23,213 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:23,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:23,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:23,214 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:23,214 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:23,239 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-28 14:31:23,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [919554398] [2020-10-28 14:31:23,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:23,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:23,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996148601] [2020-10-28 14:31:23,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:23,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:23,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:23,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:23,241 INFO L87 Difference]: Start difference. First operand 204 states and 252 transitions. Second operand 14 states. [2020-10-28 14:31:23,744 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 63 [2020-10-28 14:31:23,903 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 58 [2020-10-28 14:31:24,043 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 53 [2020-10-28 14:31:24,322 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 84 [2020-10-28 14:31:24,734 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 79 [2020-10-28 14:31:24,950 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 63 [2020-10-28 14:31:25,173 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 75 [2020-10-28 14:31:25,494 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-10-28 14:31:25,699 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 71 [2020-10-28 14:31:25,905 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 66 [2020-10-28 14:31:26,213 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 67 [2020-10-28 14:31:26,502 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 74 [2020-10-28 14:31:26,732 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-28 14:31:27,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:27,089 INFO L93 Difference]: Finished difference Result 241 states and 292 transitions. [2020-10-28 14:31:27,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:31:27,089 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 40 [2020-10-28 14:31:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:27,091 INFO L225 Difference]: With dead ends: 241 [2020-10-28 14:31:27,092 INFO L226 Difference]: Without dead ends: 226 [2020-10-28 14:31:27,093 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=184, Invalid=686, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:31:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2020-10-28 14:31:27,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 210. [2020-10-28 14:31:27,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-28 14:31:27,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 258 transitions. [2020-10-28 14:31:27,122 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 258 transitions. Word has length 40 [2020-10-28 14:31:27,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:27,122 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 258 transitions. [2020-10-28 14:31:27,122 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:27,122 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 258 transitions. [2020-10-28 14:31:27,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:31:27,123 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:27,123 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:27,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:31:27,123 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:27,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:27,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1630561212, now seen corresponding path program 1 times [2020-10-28 14:31:27,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:27,124 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [729320933] [2020-10-28 14:31:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:27,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:27,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:27,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 267 [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:31:27,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:27,641 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:27,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:27,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:27,646 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:27,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:27,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:27,647 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:31:27,647 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:27,647 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:27,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:27,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:27,648 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:27,648 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:31:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:31:27,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [729320933] [2020-10-28 14:31:27,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:27,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:31:27,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037766732] [2020-10-28 14:31:27,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:31:27,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:27,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:31:27,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:31:27,662 INFO L87 Difference]: Start difference. First operand 210 states and 258 transitions. Second operand 10 states. [2020-10-28 14:31:28,595 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 54 [2020-10-28 14:31:28,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:28,745 INFO L93 Difference]: Finished difference Result 262 states and 322 transitions. [2020-10-28 14:31:28,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:31:28,746 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 40 [2020-10-28 14:31:28,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:28,747 INFO L225 Difference]: With dead ends: 262 [2020-10-28 14:31:28,747 INFO L226 Difference]: Without dead ends: 193 [2020-10-28 14:31:28,748 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:31:28,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-28 14:31:28,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2020-10-28 14:31:28,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-28 14:31:28,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 234 transitions. [2020-10-28 14:31:28,772 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 234 transitions. Word has length 40 [2020-10-28 14:31:28,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:28,772 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 234 transitions. [2020-10-28 14:31:28,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:31:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 234 transitions. [2020-10-28 14:31:28,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:31:28,773 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:28,773 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:28,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:31:28,773 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:28,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:28,774 INFO L82 PathProgramCache]: Analyzing trace with hash -631066689, now seen corresponding path program 3 times [2020-10-28 14:31:28,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:28,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679443294] [2020-10-28 14:31:28,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:28,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:28,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:29,155 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:29,155 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:31:29,155 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:29,155 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-28 14:31:29,155 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:29,155 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:29,155 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:29,156 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:31:29,156 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:29,487 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:29,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:29,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:29,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:29,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:29,491 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:29,491 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:29,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:29,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:29,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:29,492 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:29,508 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:31:29,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679443294] [2020-10-28 14:31:29,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:29,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:31:29,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463910772] [2020-10-28 14:31:29,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:31:29,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:29,509 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:31:29,509 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:31:29,509 INFO L87 Difference]: Start difference. First operand 193 states and 234 transitions. Second operand 13 states. [2020-10-28 14:31:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:30,896 INFO L93 Difference]: Finished difference Result 345 states and 429 transitions. [2020-10-28 14:31:30,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:30,898 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 41 [2020-10-28 14:31:30,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:30,899 INFO L225 Difference]: With dead ends: 345 [2020-10-28 14:31:30,899 INFO L226 Difference]: Without dead ends: 268 [2020-10-28 14:31:30,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:31:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2020-10-28 14:31:30,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 217. [2020-10-28 14:31:30,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-28 14:31:30,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 264 transitions. [2020-10-28 14:31:30,927 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 264 transitions. Word has length 41 [2020-10-28 14:31:30,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:30,927 INFO L481 AbstractCegarLoop]: Abstraction has 217 states and 264 transitions. [2020-10-28 14:31:30,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:31:30,927 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 264 transitions. [2020-10-28 14:31:30,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:31:30,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:30,928 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:30,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:31:30,928 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:30,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:30,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1669755901, now seen corresponding path program 1 times [2020-10-28 14:31:30,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:30,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1809434992] [2020-10-28 14:31:30,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:30,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:30,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:31,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:31,499 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:31:31,499 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:31,499 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 540 [2020-10-28 14:31:31,499 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:31,499 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:31,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:31:31,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:31,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:31:31,500 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:32,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:32,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:32,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:32,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:32,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:32,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:32,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:32,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:32,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:32,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:32,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:32,235 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:31:32,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1809434992] [2020-10-28 14:31:32,236 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:32,236 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:31:32,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581973785] [2020-10-28 14:31:32,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:31:32,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:32,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:31:32,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:31:32,237 INFO L87 Difference]: Start difference. First operand 217 states and 264 transitions. Second operand 14 states. [2020-10-28 14:31:32,747 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-28 14:31:32,897 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-28 14:31:33,119 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 69 [2020-10-28 14:31:33,356 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-28 14:31:33,556 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-28 14:31:33,745 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-28 14:31:34,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:34,502 INFO L93 Difference]: Finished difference Result 363 states and 451 transitions. [2020-10-28 14:31:34,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:31:34,503 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-28 14:31:34,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:34,504 INFO L225 Difference]: With dead ends: 363 [2020-10-28 14:31:34,504 INFO L226 Difference]: Without dead ends: 286 [2020-10-28 14:31:34,506 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:31:34,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2020-10-28 14:31:34,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 226. [2020-10-28 14:31:34,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 226 states. [2020-10-28 14:31:34,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 275 transitions. [2020-10-28 14:31:34,533 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 275 transitions. Word has length 41 [2020-10-28 14:31:34,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:34,534 INFO L481 AbstractCegarLoop]: Abstraction has 226 states and 275 transitions. [2020-10-28 14:31:34,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:31:34,534 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 275 transitions. [2020-10-28 14:31:34,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:31:34,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:34,535 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:34,535 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:31:34,536 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:34,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:34,536 INFO L82 PathProgramCache]: Analyzing trace with hash -782315329, now seen corresponding path program 4 times [2020-10-28 14:31:34,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:34,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718764618] [2020-10-28 14:31:34,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:34,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:34,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:34,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:35,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:35,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:31:35,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:31:35,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 732 [2020-10-28 14:31:35,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:35,297 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:35,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:31:35,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:35,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:31:35,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:35,392 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:35,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:35,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:35,397 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:35,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:35,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:35,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:35,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:35,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:35,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:35,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:35,404 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 16 proven. 0 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-28 14:31:35,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718764618] [2020-10-28 14:31:35,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:31:35,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-28 14:31:35,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230449168] [2020-10-28 14:31:35,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:31:35,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:35,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:31:35,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:31:35,406 INFO L87 Difference]: Start difference. First operand 226 states and 275 transitions. Second operand 8 states. [2020-10-28 14:31:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:35,938 INFO L93 Difference]: Finished difference Result 349 states and 429 transitions. [2020-10-28 14:31:35,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 14:31:35,939 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 14:31:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:35,940 INFO L225 Difference]: With dead ends: 349 [2020-10-28 14:31:35,941 INFO L226 Difference]: Without dead ends: 220 [2020-10-28 14:31:35,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:35,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-28 14:31:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-10-28 14:31:35,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-28 14:31:35,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 266 transitions. [2020-10-28 14:31:35,970 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 266 transitions. Word has length 41 [2020-10-28 14:31:35,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:35,970 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 266 transitions. [2020-10-28 14:31:35,970 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:31:35,971 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 266 transitions. [2020-10-28 14:31:35,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:31:35,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:35,972 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:35,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:31:35,972 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:35,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:35,972 INFO L82 PathProgramCache]: Analyzing trace with hash -257052016, now seen corresponding path program 2 times [2020-10-28 14:31:35,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:35,973 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594346667] [2020-10-28 14:31:35,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:36,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:36,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:36,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:37,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,721 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:38,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:39,999 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:40,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:40,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:40,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:41,042 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:41,043 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:31:41,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 27 [2020-10-28 14:31:41,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-28 14:31:41,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:41,043 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:41,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:31:41,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:41,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:31:41,044 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:41,319 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-28 14:31:41,457 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 58 [2020-10-28 14:31:41,579 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 53 [2020-10-28 14:31:42,658 WARN L193 SmtUtils]: Spent 1.03 s on a formula simplification. DAG size of input: 228 DAG size of output: 114 [2020-10-28 14:31:43,686 WARN L193 SmtUtils]: Spent 970.00 ms on a formula simplification. DAG size of input: 224 DAG size of output: 104 [2020-10-28 14:31:44,636 WARN L193 SmtUtils]: Spent 891.00 ms on a formula simplification. DAG size of input: 221 DAG size of output: 102 [2020-10-28 14:31:44,789 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2020-10-28 14:31:44,966 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 32 [2020-10-28 14:31:45,132 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 28 [2020-10-28 14:31:45,280 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 26 [2020-10-28 14:31:45,604 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:45,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:45,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:45,611 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:45,611 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:45,611 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:45,611 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:31:45,611 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:45,611 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:45,612 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:45,612 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:31:45,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594346667] [2020-10-28 14:31:45,639 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:45,639 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:31:45,639 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649173845] [2020-10-28 14:31:45,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:31:45,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:45,640 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:31:45,640 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:31:45,640 INFO L87 Difference]: Start difference. First operand 220 states and 266 transitions. Second operand 16 states. [2020-10-28 14:31:46,140 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 69 [2020-10-28 14:31:46,402 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 78 [2020-10-28 14:31:46,625 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 73 [2020-10-28 14:31:47,288 WARN L193 SmtUtils]: Spent 613.00 ms on a formula simplification. DAG size of input: 186 DAG size of output: 105 [2020-10-28 14:31:47,527 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 68 [2020-10-28 14:31:48,169 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 183 DAG size of output: 100 [2020-10-28 14:31:48,489 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 87 [2020-10-28 14:31:48,730 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 82 [2020-10-28 14:31:49,123 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 107 [2020-10-28 14:31:49,743 WARN L193 SmtUtils]: Spent 544.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 100 [2020-10-28 14:31:50,475 WARN L193 SmtUtils]: Spent 630.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 117 [2020-10-28 14:31:51,087 WARN L193 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 81 [2020-10-28 14:31:51,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:51,948 INFO L93 Difference]: Finished difference Result 257 states and 307 transitions. [2020-10-28 14:31:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:31:51,949 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-28 14:31:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:51,950 INFO L225 Difference]: With dead ends: 257 [2020-10-28 14:31:51,950 INFO L226 Difference]: Without dead ends: 244 [2020-10-28 14:31:51,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=201, Invalid=989, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 14:31:51,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-28 14:31:51,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 231. [2020-10-28 14:31:51,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 231 states. [2020-10-28 14:31:51,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 279 transitions. [2020-10-28 14:31:51,981 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 279 transitions. Word has length 43 [2020-10-28 14:31:51,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:51,981 INFO L481 AbstractCegarLoop]: Abstraction has 231 states and 279 transitions. [2020-10-28 14:31:51,981 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:31:51,981 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 279 transitions. [2020-10-28 14:31:51,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:31:51,982 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:51,982 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:51,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:31:51,983 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:51,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:51,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1492519244, now seen corresponding path program 1 times [2020-10-28 14:31:51,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:51,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311270729] [2020-10-28 14:31:51,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:52,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:52,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:52,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:53,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:53,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:31:53,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:31:53,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1347 [2020-10-28 14:31:53,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:53,352 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:53,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:53,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:53,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:31:53,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:53,959 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 72 [2020-10-28 14:31:54,098 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-28 14:31:54,235 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 42 [2020-10-28 14:31:54,509 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:31:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:54,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:31:54,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:54,533 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-28 14:31:54,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311270729] [2020-10-28 14:31:54,534 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:31:54,534 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:31:54,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580182101] [2020-10-28 14:31:54,534 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:31:54,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:31:54,535 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:31:54,535 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:31:54,535 INFO L87 Difference]: Start difference. First operand 231 states and 279 transitions. Second operand 12 states. [2020-10-28 14:31:54,918 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 71 [2020-10-28 14:31:55,200 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 76 [2020-10-28 14:31:55,415 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 57 [2020-10-28 14:31:55,841 WARN L193 SmtUtils]: Spent 381.00 ms on a formula simplification. DAG size of input: 157 DAG size of output: 95 [2020-10-28 14:31:56,691 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 99 [2020-10-28 14:31:57,197 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 97 [2020-10-28 14:31:57,562 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 86 [2020-10-28 14:31:57,959 WARN L193 SmtUtils]: Spent 328.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 101 [2020-10-28 14:31:58,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:31:58,290 INFO L93 Difference]: Finished difference Result 266 states and 319 transitions. [2020-10-28 14:31:58,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:31:58,291 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 43 [2020-10-28 14:31:58,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:31:58,293 INFO L225 Difference]: With dead ends: 266 [2020-10-28 14:31:58,293 INFO L226 Difference]: Without dead ends: 243 [2020-10-28 14:31:58,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=133, Invalid=467, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:31:58,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-28 14:31:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 228. [2020-10-28 14:31:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-28 14:31:58,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 274 transitions. [2020-10-28 14:31:58,325 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 274 transitions. Word has length 43 [2020-10-28 14:31:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:31:58,325 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 274 transitions. [2020-10-28 14:31:58,325 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:31:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 274 transitions. [2020-10-28 14:31:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:31:58,326 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:31:58,326 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:31:58,326 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:31:58,326 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:31:58,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:31:58,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1669080636, now seen corresponding path program 5 times [2020-10-28 14:31:58,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:31:58,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [940857940] [2020-10-28 14:31:58,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:31:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:31:58,396 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:31:59,052 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 689 [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:31:59,053 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:31:59,081 ERROR L253 erpolLogProxyWrapper]: Interpolant 23 not inductive [2020-10-28 14:31:59,085 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:31:59,085 FATAL L? ?]: An unrecoverable error occured during an interaction with an SMT solver: de.uni_freiburg.informatik.ultimate.logic.SMTLIBException: generated interpolants did not pass sanity check at de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) at de.uni_freiburg.informatik.ultimate.smtinterpol.smtlib2.SMTInterpol.getInterpolants(SMTInterpol.java:851) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:155) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:256) at de.uni_freiburg.informatik.ultimate.smtinterpol.muses.MusEnumerationScript.getInterpolants(MusEnumerationScript.java:150) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.logic.WrapperScript.getInterpolants(WrapperScript.java:337) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.ManagedScript.getInterpolants(ManagedScript.java:191) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.computeCraigInterpolants(NestedInterpolantsBuilder.java:285) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.NestedInterpolantsBuilder.(NestedInterpolantsBuilder.java:166) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolantsRecursive(InterpolatingTraceCheckCraig.java:326) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.computeInterpolants(InterpolatingTraceCheckCraig.java:228) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.InterpolatingTraceCheckCraig.(InterpolatingTraceCheckCraig.java:97) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModulePreferences.construct(IpTcStrategyModulePreferences.java:109) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.isCorrect(IpTcStrategyModuleBase.java:56) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.checkFeasibility(AutomatonFreeRefinementEngine.java:241) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:165) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:511) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:438) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:372) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopResult.iterate(CegarLoopResult.java:142) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterateNew(TraceAbstractionStarter.java:341) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:182) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:134) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2020-10-28 14:31:59,094 INFO L168 Benchmark]: Toolchain (without parser) took 107437.49 ms. Allocated memory was 151.0 MB in the beginning and 660.6 MB in the end (delta: 509.6 MB). Free memory was 125.5 MB in the beginning and 314.1 MB in the end (delta: -188.5 MB). Peak memory consumption was 395.2 MB. Max. memory is 8.0 GB. [2020-10-28 14:31:59,095 INFO L168 Benchmark]: CDTParser took 0.75 ms. Allocated memory is still 151.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-10-28 14:31:59,095 INFO L168 Benchmark]: CACSL2BoogieTranslator took 605.91 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 102.7 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. [2020-10-28 14:31:59,095 INFO L168 Benchmark]: Boogie Preprocessor took 76.99 ms. Allocated memory is still 151.0 MB. Free memory was 102.7 MB in the beginning and 99.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:31:59,096 INFO L168 Benchmark]: RCFGBuilder took 1028.99 ms. Allocated memory is still 151.0 MB. Free memory was 99.6 MB in the beginning and 88.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. [2020-10-28 14:31:59,096 INFO L168 Benchmark]: TraceAbstraction took 105710.33 ms. Allocated memory was 151.0 MB in the beginning and 660.6 MB in the end (delta: 509.6 MB). Free memory was 87.7 MB in the beginning and 314.1 MB in the end (delta: -226.4 MB). Peak memory consumption was 355.8 MB. Max. memory is 8.0 GB. [2020-10-28 14:31:59,098 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.75 ms. Allocated memory is still 151.0 MB. Free memory is still 125.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 605.91 ms. Allocated memory is still 151.0 MB. Free memory was 125.0 MB in the beginning and 102.7 MB in the end (delta: 22.3 MB). Peak memory consumption was 22.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 76.99 ms. Allocated memory is still 151.0 MB. Free memory was 102.7 MB in the beginning and 99.8 MB in the end (delta: 2.9 MB). Peak memory consumption was 3.1 MB. Max. memory is 8.0 GB. * RCFGBuilder took 1028.99 ms. Allocated memory is still 151.0 MB. Free memory was 99.6 MB in the beginning and 88.2 MB in the end (delta: 11.3 MB). Peak memory consumption was 12.1 MB. Max. memory is 8.0 GB. * TraceAbstraction took 105710.33 ms. Allocated memory was 151.0 MB in the beginning and 660.6 MB in the end (delta: 509.6 MB). Free memory was 87.7 MB in the beginning and 314.1 MB in the end (delta: -226.4 MB). Peak memory consumption was 355.8 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: SMTLIBException: generated interpolants did not pass sanity check de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMTLIBException: generated interpolants did not pass sanity check: de.uni_freiburg.informatik.ultimate.smtinterpol.interpolate.Interpolator.getInterpolants(Interpolator.java:219) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...