/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/list-ext3-properties/sll_length_check-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 14:41:26,634 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 14:41:26,639 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 14:41:26,708 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 14:41:26,708 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 14:41:26,716 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 14:41:26,718 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 14:41:26,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 14:41:26,727 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 14:41:26,733 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 14:41:26,735 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 14:41:26,737 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 14:41:26,737 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 14:41:26,741 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 14:41:26,743 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 14:41:26,745 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 14:41:26,746 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 14:41:26,747 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 14:41:26,750 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 14:41:26,758 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 14:41:26,761 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 14:41:26,763 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 14:41:26,764 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 14:41:26,765 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 14:41:26,769 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 14:41:26,769 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 14:41:26,770 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 14:41:26,786 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 14:41:26,787 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 14:41:26,788 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 14:41:26,788 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 14:41:26,789 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 14:41:26,790 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 14:41:26,791 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 14:41:26,792 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 14:41:26,793 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 14:41:26,794 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 14:41:26,794 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 14:41:26,794 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 14:41:26,796 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 14:41:26,797 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 14:41:26,798 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 14:41:26,826 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 14:41:26,827 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 14:41:26,828 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 14:41:26,829 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 14:41:26,829 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 14:41:26,829 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 14:41:26,830 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 14:41:26,830 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 14:41:26,830 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 14:41:26,831 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 14:41:26,831 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 14:41:26,831 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 14:41:26,831 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 14:41:26,832 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 14:41:26,832 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 14:41:26,832 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 14:41:26,832 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 14:41:26,833 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 14:41:26,833 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 14:41:26,834 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 14:41:26,834 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 14:41:26,834 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 14:41:26,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 14:41:26,835 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 14:41:26,835 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 14:41:26,835 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 14:41:26,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 14:41:26,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 14:41:26,836 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 14:41:26,837 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 14:41:27,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 14:41:27,275 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 14:41:27,279 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 14:41:27,280 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 14:41:27,281 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 14:41:27,282 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2020-10-28 14:41:27,366 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb6131230/69b3d85f4eeb4fef86f223eae7c1e569/FLAG6167cca1a [2020-10-28 14:41:28,161 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 14:41:28,162 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/list-ext3-properties/sll_length_check-2.i [2020-10-28 14:41:28,185 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb6131230/69b3d85f4eeb4fef86f223eae7c1e569/FLAG6167cca1a [2020-10-28 14:41:28,360 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/bb6131230/69b3d85f4eeb4fef86f223eae7c1e569 [2020-10-28 14:41:28,372 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 14:41:28,381 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 14:41:28,385 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 14:41:28,386 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 14:41:28,390 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 14:41:28,392 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:28,396 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7488d9d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28, skipping insertion in model container [2020-10-28 14:41:28,397 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:28,406 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 14:41:28,477 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 14:41:28,862 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:41:28,874 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 14:41:28,919 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 14:41:28,988 INFO L208 MainTranslator]: Completed translation [2020-10-28 14:41:28,989 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28 WrapperNode [2020-10-28 14:41:28,989 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 14:41:28,990 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 14:41:28,991 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 14:41:28,991 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 14:41:29,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:29,006 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:29,022 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:29,022 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:29,039 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:29,045 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:29,053 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (1/1) ... [2020-10-28 14:41:29,066 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 14:41:29,067 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 14:41:29,068 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 14:41:29,068 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 14:41:29,083 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (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 14:41:29,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 14:41:29,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 14:41:29,208 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 14:41:29,208 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_32 [2020-10-28 14:41:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure __bswap_64 [2020-10-28 14:41:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure myexit [2020-10-28 14:41:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_create [2020-10-28 14:41:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_length [2020-10-28 14:41:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure sll_destroy [2020-10-28 14:41:29,209 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 14:41:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 14:41:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 14:41:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 14:41:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 14:41:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 14:41:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 14:41:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 14:41:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_32 [2020-10-28 14:41:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure __bswap_64 [2020-10-28 14:41:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-28 14:41:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-28 14:41:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-28 14:41:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-28 14:41:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-28 14:41:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-28 14:41:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-28 14:41:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-28 14:41:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-28 14:41:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-28 14:41:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-28 14:41:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-28 14:41:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-28 14:41:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-28 14:41:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-28 14:41:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-28 14:41:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-28 14:41:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-28 14:41:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-28 14:41:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-28 14:41:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-28 14:41:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-28 14:41:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-28 14:41:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-28 14:41:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-28 14:41:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-28 14:41:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-28 14:41:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-28 14:41:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-28 14:41:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-28 14:41:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-28 14:41:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-28 14:41:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-28 14:41:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-28 14:41:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-28 14:41:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-28 14:41:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-28 14:41:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-28 14:41:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-28 14:41:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-28 14:41:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-28 14:41:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-28 14:41:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-28 14:41:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-28 14:41:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-28 14:41:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-28 14:41:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-28 14:41:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-28 14:41:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-28 14:41:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-28 14:41:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 14:41:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-28 14:41:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-28 14:41:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-28 14:41:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-28 14:41:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-28 14:41:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-28 14:41:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-28 14:41:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-28 14:41:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-28 14:41:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-28 14:41:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-28 14:41:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-28 14:41:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-28 14:41:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-28 14:41:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-28 14:41:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-28 14:41:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-28 14:41:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-28 14:41:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-28 14:41:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-28 14:41:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-28 14:41:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-28 14:41:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-28 14:41:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-28 14:41:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-28 14:41:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-28 14:41:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-28 14:41:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-28 14:41:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-28 14:41:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-28 14:41:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-28 14:41:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-28 14:41:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-28 14:41:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-28 14:41:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-28 14:41:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-28 14:41:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-28 14:41:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-28 14:41:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-28 14:41:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-28 14:41:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-28 14:41:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-28 14:41:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-28 14:41:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-28 14:41:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-28 14:41:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-28 14:41:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-28 14:41:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-28 14:41:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-28 14:41:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-28 14:41:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-28 14:41:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure myexit [2020-10-28 14:41:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure sll_create [2020-10-28 14:41:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 14:41:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-28 14:41:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure sll_length [2020-10-28 14:41:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-28 14:41:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure sll_destroy [2020-10-28 14:41:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 14:41:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 14:41:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 14:41:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 14:41:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 14:41:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 14:41:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 14:41:29,628 INFO L751 $ProcedureCfgBuilder]: dead code at ProgramPoint myexitFINAL: assume true; [2020-10-28 14:41:29,847 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 14:41:29,848 INFO L298 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-28 14:41:29,850 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:41:29 BoogieIcfgContainer [2020-10-28 14:41:29,850 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 14:41:29,852 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 14:41:29,852 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 14:41:29,856 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 14:41:29,856 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 02:41:28" (1/3) ... [2020-10-28 14:41:29,857 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5624bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:41:29, skipping insertion in model container [2020-10-28 14:41:29,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 02:41:28" (2/3) ... [2020-10-28 14:41:29,858 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5624bfb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 02:41:29, skipping insertion in model container [2020-10-28 14:41:29,858 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 02:41:29" (3/3) ... [2020-10-28 14:41:29,860 INFO L111 eAbstractionObserver]: Analyzing ICFG sll_length_check-2.i [2020-10-28 14:41:29,875 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 14:41:29,881 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 14:41:29,897 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 14:41:29,926 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 14:41:29,926 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 14:41:29,927 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 14:41:29,927 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 14:41:29,927 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 14:41:29,927 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 14:41:29,927 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 14:41:29,927 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 14:41:29,948 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states. [2020-10-28 14:41:29,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 14:41:29,956 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:29,957 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:29,957 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:29,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:29,964 INFO L82 PathProgramCache]: Analyzing trace with hash -1271350858, now seen corresponding path program 1 times [2020-10-28 14:41:29,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:29,975 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [327583483] [2020-10-28 14:41:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:30,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:30,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:30,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:30,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:30,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-28 14:41:30,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:30,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 244 [2020-10-28 14:41:30,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:30,397 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 14:41:30,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:30,398 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-28 14:41:30,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:30,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:30,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:30,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:30,491 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:30,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:30,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:41:30,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:30,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:30,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:30,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:30,519 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 14:41:30,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:30,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:30,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:30,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:41:30,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:30,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:41:30,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:30,538 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:30,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:30,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 3 [2020-10-28 14:41:30,539 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:30,539 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:30,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2020-10-28 14:41:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:30,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:30,556 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:30,556 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:41:30,556 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:30,557 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:41:30,557 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:30,557 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:30,557 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 14:41:30,558 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:30,558 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:30,571 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 14:41:30,572 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [327583483] [2020-10-28 14:41:30,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:30,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 14:41:30,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085006322] [2020-10-28 14:41:30,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 14:41:30,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:30,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 14:41:30,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 14:41:30,607 INFO L87 Difference]: Start difference. First operand 46 states. Second operand 4 states. [2020-10-28 14:41:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:30,921 INFO L93 Difference]: Finished difference Result 96 states and 130 transitions. [2020-10-28 14:41:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 14:41:30,923 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 14:41:30,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:30,933 INFO L225 Difference]: With dead ends: 96 [2020-10-28 14:41:30,933 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:41:30,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-28 14:41:30,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:41:30,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 30. [2020-10-28 14:41:30,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 14:41:30,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2020-10-28 14:41:30,988 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 25 [2020-10-28 14:41:30,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:30,989 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2020-10-28 14:41:30,989 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 14:41:30,989 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2020-10-28 14:41:30,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-28 14:41:30,990 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:30,991 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:30,991 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 14:41:30,991 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:30,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:30,992 INFO L82 PathProgramCache]: Analyzing trace with hash -272217543, now seen corresponding path program 1 times [2020-10-28 14:41:30,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:30,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2014800113] [2020-10-28 14:41:30,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,020 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-28 14:41:31,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 14:41:31,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 551 [2020-10-28 14:41:31,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,564 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:41:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:31,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:41:31,565 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:31,607 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,620 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,620 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:31,620 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:31,620 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 14:41:31,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,621 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:31,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:31,621 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:31,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:31,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:31,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,694 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:41:31,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:31,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 21 [2020-10-28 14:41:31,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,696 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:41:31,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:31,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:41:31,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:31,727 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2020-10-28 14:41:31,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:31,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:31,735 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:31,735 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:41:31,736 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:31,736 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:31,736 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:31,736 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:31,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:31,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 14:41:31,737 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:31,737 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:31,743 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 14:41:31,744 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2014800113] [2020-10-28 14:41:31,744 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:31,744 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-28 14:41:31,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937957850] [2020-10-28 14:41:31,746 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:41:31,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:31,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:41:31,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:41:31,748 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand 7 states. [2020-10-28 14:41:32,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:32,031 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2020-10-28 14:41:32,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 14:41:32,032 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-28 14:41:32,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:32,033 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:41:32,033 INFO L226 Difference]: Without dead ends: 33 [2020-10-28 14:41:32,035 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:41:32,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2020-10-28 14:41:32,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 31. [2020-10-28 14:41:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2020-10-28 14:41:32,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2020-10-28 14:41:32,044 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 27 [2020-10-28 14:41:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:32,044 INFO L481 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2020-10-28 14:41:32,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:41:32,044 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2020-10-28 14:41:32,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:41:32,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:32,046 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:32,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 14:41:32,046 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:32,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:32,047 INFO L82 PathProgramCache]: Analyzing trace with hash -991161197, now seen corresponding path program 1 times [2020-10-28 14:41:32,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:32,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [977360350] [2020-10-28 14:41:32,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:32,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:32,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:32,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:32,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:32,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:32,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:33,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:33,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:35,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:35,321 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:41:35,321 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 14:41:35,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3252 [2020-10-28 14:41:35,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:35,322 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:35,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 14:41:35,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:35,322 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 14:41:35,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 14:41:35,371 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:35,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:35,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:35,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:35,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:35,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:35,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:35,379 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:35,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:35,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:35,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:35,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:35,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:35,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:35,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:35,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:41:35,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:35,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-28 14:41:35,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:35,428 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 14:41:35,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:35,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:35,433 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 14:41:35,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:35,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:35,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:35,442 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:41:35,442 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:35,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:35,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:35,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:35,443 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:35,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-10-28 14:41:35,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:35,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:35,449 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:35,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [977360350] [2020-10-28 14:41:35,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:35,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-28 14:41:35,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075727602] [2020-10-28 14:41:35,451 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 14:41:35,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:35,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 14:41:35,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-28 14:41:35,454 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand 6 states. [2020-10-28 14:41:35,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:35,703 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-28 14:41:35,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 14:41:35,704 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-28 14:41:35,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:35,705 INFO L225 Difference]: With dead ends: 65 [2020-10-28 14:41:35,706 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:41:35,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:41:35,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:41:35,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 33. [2020-10-28 14:41:35,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-28 14:41:35,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 36 transitions. [2020-10-28 14:41:35,715 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 36 transitions. Word has length 30 [2020-10-28 14:41:35,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:35,716 INFO L481 AbstractCegarLoop]: Abstraction has 33 states and 36 transitions. [2020-10-28 14:41:35,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 14:41:35,716 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 36 transitions. [2020-10-28 14:41:35,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-28 14:41:35,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:35,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:35,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 14:41:35,718 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:35,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:35,718 INFO L82 PathProgramCache]: Analyzing trace with hash 814277137, now seen corresponding path program 1 times [2020-10-28 14:41:35,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:35,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [295188044] [2020-10-28 14:41:35,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:35,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:35,739 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:35,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:35,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:36,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:36,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-28 14:41:36,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 14:41:36,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 728 [2020-10-28 14:41:36,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:36,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:36,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:41:36,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:41:36,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:41:36,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:36,508 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:36,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:36,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:36,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:36,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:36,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:36,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:36,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:36,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:36,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:36,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:36,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:36,517 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:36,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:36,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:36,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:36,580 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:36,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:41:36,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:36,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 14:41:36,581 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:36,581 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:36,581 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:41:36,581 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:36,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 14:41:36,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:36,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:36,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:36,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 10 [2020-10-28 14:41:36,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:36,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 14:41:36,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:36,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:41:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:36,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:41:36,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:36,685 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:36,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [295188044] [2020-10-28 14:41:36,686 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 14:41:36,686 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2020-10-28 14:41:36,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119636739] [2020-10-28 14:41:36,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:41:36,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:36,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:41:36,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:41:36,691 INFO L87 Difference]: Start difference. First operand 33 states and 36 transitions. Second operand 11 states. [2020-10-28 14:41:37,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:37,084 INFO L93 Difference]: Finished difference Result 45 states and 48 transitions. [2020-10-28 14:41:37,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:41:37,085 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 30 [2020-10-28 14:41:37,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:37,088 INFO L225 Difference]: With dead ends: 45 [2020-10-28 14:41:37,088 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 14:41:37,092 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:41:37,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 14:41:37,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 34. [2020-10-28 14:41:37,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-28 14:41:37,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 37 transitions. [2020-10-28 14:41:37,105 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 37 transitions. Word has length 30 [2020-10-28 14:41:37,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:37,105 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 37 transitions. [2020-10-28 14:41:37,105 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:41:37,105 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 37 transitions. [2020-10-28 14:41:37,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 14:41:37,106 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:37,106 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:37,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 14:41:37,107 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:37,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:37,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1806048650, now seen corresponding path program 1 times [2020-10-28 14:41:37,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:37,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [4507783] [2020-10-28 14:41:37,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:37,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:37,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:37,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-28 14:41:37,470 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:37,470 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 336 [2020-10-28 14:41:37,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:37,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:37,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:41:37,471 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:37,504 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:37,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:37,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:37,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:37,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:41:37,513 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:37,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:37,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:37,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:37,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:37,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:37,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:37,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:37,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:37,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:41:37,565 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:37,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 14:41:37,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:37,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:37,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:37,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:37,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:41:37,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:37,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2020-10-28 14:41:37,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:37,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:37,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 14:41:37,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:37,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:41:37,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:37,609 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 8 [2020-10-28 14:41:37,610 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:37,610 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:37,615 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-28 14:41:37,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [4507783] [2020-10-28 14:41:37,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:37,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:41:37,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277054903] [2020-10-28 14:41:37,616 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:41:37,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:37,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:41:37,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:41:37,617 INFO L87 Difference]: Start difference. First operand 34 states and 37 transitions. Second operand 8 states. [2020-10-28 14:41:37,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:37,857 INFO L93 Difference]: Finished difference Result 56 states and 60 transitions. [2020-10-28 14:41:37,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:41:37,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 31 [2020-10-28 14:41:37,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:37,859 INFO L225 Difference]: With dead ends: 56 [2020-10-28 14:41:37,859 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 14:41:37,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:41:37,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 14:41:37,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-28 14:41:37,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-28 14:41:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-28 14:41:37,868 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 31 [2020-10-28 14:41:37,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:37,868 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-28 14:41:37,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:41:37,868 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-28 14:41:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-28 14:41:37,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:37,870 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] [2020-10-28 14:41:37,870 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 14:41:37,870 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:37,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:37,871 INFO L82 PathProgramCache]: Analyzing trace with hash -136319988, now seen corresponding path program 2 times [2020-10-28 14:41:37,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:37,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [356158115] [2020-10-28 14:41:37,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:37,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:37,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:38,483 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:38,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-28 14:41:38,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:38,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 594 [2020-10-28 14:41:38,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:38,484 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:38,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:41:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:41:38,485 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:41:38,485 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:38,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:38,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:38,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:38,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:38,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:38,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:38,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:38,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:38,542 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:38,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:38,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:38,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:38,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:38,564 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:38,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:38,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:38,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:38,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:38,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 60 [2020-10-28 14:41:38,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:38,634 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:38,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:38,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:41:38,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:38,713 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:41:38,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:38,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:38,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:38,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-10-28 14:41:38,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:38,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-28 14:41:38,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:38,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:38,732 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:41:38,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:38,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 14:41:38,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:38,795 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [356158115] [2020-10-28 14:41:38,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:38,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 14:41:38,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076133500] [2020-10-28 14:41:38,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 14:41:38,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:38,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 14:41:38,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:41:38,798 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 13 states. [2020-10-28 14:41:39,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:39,316 INFO L93 Difference]: Finished difference Result 49 states and 52 transitions. [2020-10-28 14:41:39,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:41:39,316 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 34 [2020-10-28 14:41:39,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:39,318 INFO L225 Difference]: With dead ends: 49 [2020-10-28 14:41:39,318 INFO L226 Difference]: Without dead ends: 40 [2020-10-28 14:41:39,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:41:39,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2020-10-28 14:41:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 38. [2020-10-28 14:41:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-28 14:41:39,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 41 transitions. [2020-10-28 14:41:39,326 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 41 transitions. Word has length 34 [2020-10-28 14:41:39,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:39,327 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 41 transitions. [2020-10-28 14:41:39,327 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 14:41:39,327 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 41 transitions. [2020-10-28 14:41:39,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-28 14:41:39,328 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:39,328 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 14:41:39,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 14:41:39,328 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:39,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:39,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1209788453, now seen corresponding path program 3 times [2020-10-28 14:41:39,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:39,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1161880067] [2020-10-28 14:41:39,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:39,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:39,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:39,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:39,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:39,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 14:41:39,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:39,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 419 [2020-10-28 14:41:39,766 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:39,766 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:39,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:41:39,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:39,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:41:39,767 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:39,882 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:39,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:39,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:39,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:39,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:39,906 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:39,906 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:41:39,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:39,906 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:39,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:39,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:39,907 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:39,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:39,939 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:39,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:39,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:39,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:40,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:40,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:40,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:40,079 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 14:41:40,079 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:40,079 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:40,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:41:40,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:40,080 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:41:40,080 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:40,087 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:41:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:40,092 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:40,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:40,116 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:41:40,116 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:40,116 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 14:41:40,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:40,117 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:41:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:40,117 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:41:40,117 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:40,194 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 14:41:40,195 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1161880067] [2020-10-28 14:41:40,195 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:40,195 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:41:40,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10331848] [2020-10-28 14:41:40,196 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:41:40,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:40,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:41:40,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:41:40,199 INFO L87 Difference]: Start difference. First operand 38 states and 41 transitions. Second operand 10 states. [2020-10-28 14:41:40,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:40,682 INFO L93 Difference]: Finished difference Result 55 states and 62 transitions. [2020-10-28 14:41:40,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:41:40,683 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 35 [2020-10-28 14:41:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:40,686 INFO L225 Difference]: With dead ends: 55 [2020-10-28 14:41:40,687 INFO L226 Difference]: Without dead ends: 49 [2020-10-28 14:41:40,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:41:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-28 14:41:40,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-28 14:41:40,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-28 14:41:40,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2020-10-28 14:41:40,698 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2020-10-28 14:41:40,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:40,698 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2020-10-28 14:41:40,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:41:40,698 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2020-10-28 14:41:40,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-28 14:41:40,700 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:40,700 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] [2020-10-28 14:41:40,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 14:41:40,701 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:40,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:40,701 INFO L82 PathProgramCache]: Analyzing trace with hash -127572500, now seen corresponding path program 4 times [2020-10-28 14:41:40,702 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:40,702 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013552184] [2020-10-28 14:41:40,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:40,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:40,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:40,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:41,429 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:41,429 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-28 14:41:41,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:41,430 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 693 [2020-10-28 14:41:41,430 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:41,430 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:41:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:41,430 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:41:41,431 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:41,608 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 27 [2020-10-28 14:41:41,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:41,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:41,728 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:41,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:41,732 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:41,732 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:41,732 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:41:41,732 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:41,732 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:41,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:41,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:41,733 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:41,733 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:41,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:41,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:41,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:41,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:41,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:41,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:41,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-28 14:41:41,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:41,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:41,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:41,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:41,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:41:41,874 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:42,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:41:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:42,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:42,093 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:42,093 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:41:42,093 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:42,094 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-28 14:41:42,094 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:42,094 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:41:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:42,094 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:41:42,095 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:42,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:42,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013552184] [2020-10-28 14:41:42,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:42,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:41:42,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225558419] [2020-10-28 14:41:42,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:41:42,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:42,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:41:42,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:41:42,403 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand 15 states. [2020-10-28 14:41:43,571 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 75 [2020-10-28 14:41:43,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:43,780 INFO L93 Difference]: Finished difference Result 71 states and 86 transitions. [2020-10-28 14:41:43,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:41:43,782 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 36 [2020-10-28 14:41:43,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:43,784 INFO L225 Difference]: With dead ends: 71 [2020-10-28 14:41:43,784 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 14:41:43,789 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:41:43,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 14:41:43,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-28 14:41:43,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:41:43,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 74 transitions. [2020-10-28 14:41:43,813 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 74 transitions. Word has length 36 [2020-10-28 14:41:43,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:43,813 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 74 transitions. [2020-10-28 14:41:43,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:41:43,813 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 74 transitions. [2020-10-28 14:41:43,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 14:41:43,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:43,819 INFO L422 BasicCegarLoop]: trace histogram [4, 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] [2020-10-28 14:41:43,820 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 14:41:43,820 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash -938616325, now seen corresponding path program 5 times [2020-10-28 14:41:43,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:43,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745567428] [2020-10-28 14:41:43,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:43,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:43,856 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:43,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:44,799 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:44,799 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-28 14:41:44,800 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:44,800 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 954 [2020-10-28 14:41:44,800 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:44,800 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:44,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:41:44,800 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:44,801 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:41:44,801 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:44,990 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:44,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:44,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:44,996 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:44,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:44,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:44,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:44,997 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:44,997 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:44,997 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:44,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:44,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:45,020 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:45,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:45,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:45,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:45,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:45,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:45,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 89 [2020-10-28 14:41:45,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:45,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:45,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:41:45,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:45,340 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:41:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:45,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:45,420 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:45,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 14:41:45,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:45,421 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 73 [2020-10-28 14:41:45,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:45,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:45,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:41:45,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:45,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:41:45,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:45,801 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:45,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745567428] [2020-10-28 14:41:45,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:45,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:41:45,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493835191] [2020-10-28 14:41:45,803 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:41:45,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:45,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:41:45,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:41:45,804 INFO L87 Difference]: Start difference. First operand 60 states and 74 transitions. Second operand 16 states. [2020-10-28 14:41:46,985 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 68 [2020-10-28 14:41:47,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:47,238 INFO L93 Difference]: Finished difference Result 75 states and 92 transitions. [2020-10-28 14:41:47,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:41:47,240 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 37 [2020-10-28 14:41:47,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:47,241 INFO L225 Difference]: With dead ends: 75 [2020-10-28 14:41:47,242 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 14:41:47,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:41:47,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 14:41:47,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-28 14:41:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:41:47,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 76 transitions. [2020-10-28 14:41:47,257 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 76 transitions. Word has length 37 [2020-10-28 14:41:47,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:47,258 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 76 transitions. [2020-10-28 14:41:47,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:41:47,258 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 76 transitions. [2020-10-28 14:41:47,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:41:47,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:47,260 INFO L422 BasicCegarLoop]: trace histogram [5, 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] [2020-10-28 14:41:47,260 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 14:41:47,260 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:47,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:47,261 INFO L82 PathProgramCache]: Analyzing trace with hash -311171124, now seen corresponding path program 6 times [2020-10-28 14:41:47,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:47,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [547711690] [2020-10-28 14:41:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:47,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:47,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:47,395 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:48,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:41:48,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:48,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 870 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 14:41:48,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:48,240 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:48,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:48,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,248 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:48,248 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:48,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:48,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:48,249 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:48,249 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:48,249 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:48,249 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:48,271 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:48,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:48,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:48,343 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:48,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 14:41:48,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:48,344 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:48,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:48,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:48,344 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:41:48,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:48,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:41:48,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:48,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:48,570 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:48,570 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:41:48,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:48,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 46 [2020-10-28 14:41:48,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:48,571 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:41:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:48,571 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:41:48,571 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:48,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:48,919 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [547711690] [2020-10-28 14:41:48,919 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:48,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:41:48,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655158911] [2020-10-28 14:41:48,920 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:41:48,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:48,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:41:48,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=238, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:41:48,921 INFO L87 Difference]: Start difference. First operand 61 states and 76 transitions. Second operand 17 states. [2020-10-28 14:41:50,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:50,396 INFO L93 Difference]: Finished difference Result 79 states and 98 transitions. [2020-10-28 14:41:50,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:41:50,397 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 38 [2020-10-28 14:41:50,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:50,399 INFO L225 Difference]: With dead ends: 79 [2020-10-28 14:41:50,399 INFO L226 Difference]: Without dead ends: 73 [2020-10-28 14:41:50,403 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2020-10-28 14:41:50,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-28 14:41:50,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-28 14:41:50,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:41:50,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 78 transitions. [2020-10-28 14:41:50,435 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 78 transitions. Word has length 38 [2020-10-28 14:41:50,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:50,435 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 78 transitions. [2020-10-28 14:41:50,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:41:50,436 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 78 transitions. [2020-10-28 14:41:50,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:41:50,437 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:50,442 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] [2020-10-28 14:41:50,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 14:41:50,443 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:50,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:50,446 INFO L82 PathProgramCache]: Analyzing trace with hash -590936510, now seen corresponding path program 1 times [2020-10-28 14:41:50,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:50,449 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [334203283] [2020-10-28 14:41:50,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:50,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:50,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:50,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:50,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:50,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:50,885 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:52,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:52,329 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:41:52,329 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:41:52,329 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1851 [2020-10-28 14:41:52,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:52,330 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:52,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 14:41:52,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:52,330 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 14:41:52,330 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:52,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:52,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:52,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:52,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:52,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:52,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:52,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:52,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:52,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:52,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:52,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:52,405 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:41:52,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:52,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:52,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:52,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:52,425 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:52,425 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-28 14:41:52,425 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:52,425 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-28 14:41:52,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:52,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:52,431 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 14:41:52,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:52,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:52,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:52,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:41:52,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:52,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:52,443 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:52,443 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:52,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:52,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 14:41:52,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:52,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:52,448 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-28 14:41:52,448 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [334203283] [2020-10-28 14:41:52,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:52,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 14:41:52,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041172877] [2020-10-28 14:41:52,450 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 14:41:52,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:52,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 14:41:52,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-10-28 14:41:52,451 INFO L87 Difference]: Start difference. First operand 62 states and 78 transitions. Second operand 7 states. [2020-10-28 14:41:52,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:52,843 INFO L93 Difference]: Finished difference Result 124 states and 159 transitions. [2020-10-28 14:41:52,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 14:41:52,844 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 38 [2020-10-28 14:41:52,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:52,847 INFO L225 Difference]: With dead ends: 124 [2020-10-28 14:41:52,847 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:41:52,849 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:41:52,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:41:52,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 64. [2020-10-28 14:41:52,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 14:41:52,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 80 transitions. [2020-10-28 14:41:52,878 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 80 transitions. Word has length 38 [2020-10-28 14:41:52,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:52,878 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 80 transitions. [2020-10-28 14:41:52,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 14:41:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 80 transitions. [2020-10-28 14:41:52,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-28 14:41:52,883 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:52,884 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:52,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 14:41:52,885 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:52,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:52,885 INFO L82 PathProgramCache]: Analyzing trace with hash -81463420, now seen corresponding path program 1 times [2020-10-28 14:41:52,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:52,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474023292] [2020-10-28 14:41:52,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:52,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:52,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:53,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:53,488 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-28 14:41:53,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:53,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 582 [2020-10-28 14:41:53,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:53,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:41:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:41:53,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:53,532 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:53,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:53,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:53,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:53,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:53,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:53,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:53,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:53,537 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:53,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:53,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:53,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:53,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:53,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:41:53,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:53,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:53,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:53,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:53,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:53,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 14:41:53,615 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:53,615 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:53,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:53,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:53,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:41:53,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:53,667 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 14:41:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:53,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:53,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:53,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:41:53,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:53,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:41:53,676 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:53,676 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:53,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:53,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 9 [2020-10-28 14:41:53,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:53,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:53,681 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:41:53,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474023292] [2020-10-28 14:41:53,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:53,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 14:41:53,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972850820] [2020-10-28 14:41:53,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 14:41:53,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:53,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 14:41:53,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-28 14:41:53,685 INFO L87 Difference]: Start difference. First operand 64 states and 80 transitions. Second operand 10 states. [2020-10-28 14:41:54,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:54,045 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-28 14:41:54,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:41:54,046 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-28 14:41:54,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:54,047 INFO L225 Difference]: With dead ends: 92 [2020-10-28 14:41:54,047 INFO L226 Difference]: Without dead ends: 67 [2020-10-28 14:41:54,048 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:41:54,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-28 14:41:54,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2020-10-28 14:41:54,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-28 14:41:54,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 75 transitions. [2020-10-28 14:41:54,070 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 75 transitions. Word has length 38 [2020-10-28 14:41:54,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:54,070 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 75 transitions. [2020-10-28 14:41:54,070 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 14:41:54,070 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 75 transitions. [2020-10-28 14:41:54,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:41:54,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:54,072 INFO L422 BasicCegarLoop]: trace histogram [6, 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] [2020-10-28 14:41:54,072 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 14:41:54,073 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:54,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:54,073 INFO L82 PathProgramCache]: Analyzing trace with hash 1959760923, now seen corresponding path program 7 times [2020-10-28 14:41:54,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:54,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473730778] [2020-10-28 14:41:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:54,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:54,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:54,215 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:54,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:54,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:41:54,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:54,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 890 [2020-10-28 14:41:54,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:54,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:41:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:41:54,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 14:41:54,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:55,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:55,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:55,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:55,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:55,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:55,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:55,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:41:55,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:55,105 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:55,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:55,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:55,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:55,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:55,129 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:55,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:55,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:55,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:55,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:55,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-28 14:41:55,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:55,218 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:55,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:55,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:55,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:41:55,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:55,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:41:55,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:55,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:55,492 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:55,493 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:41:55,493 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:55,493 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 76 [2020-10-28 14:41:55,493 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:55,494 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:55,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:41:55,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:55,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:41:55,494 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:56,204 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 14:41:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:41:56,312 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473730778] [2020-10-28 14:41:56,312 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:56,312 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:41:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243428126] [2020-10-28 14:41:56,313 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:41:56,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:56,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:41:56,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:41:56,314 INFO L87 Difference]: Start difference. First operand 62 states and 75 transitions. Second operand 18 states. [2020-10-28 14:41:58,074 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 109 [2020-10-28 14:41:58,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:58,433 INFO L93 Difference]: Finished difference Result 83 states and 100 transitions. [2020-10-28 14:41:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:41:58,433 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 39 [2020-10-28 14:41:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:58,435 INFO L225 Difference]: With dead ends: 83 [2020-10-28 14:41:58,435 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:41:58,437 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=97, Invalid=715, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:41:58,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:41:58,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 63. [2020-10-28 14:41:58,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 14:41:58,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 77 transitions. [2020-10-28 14:41:58,457 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 77 transitions. Word has length 39 [2020-10-28 14:41:58,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:58,458 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 77 transitions. [2020-10-28 14:41:58,458 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:41:58,458 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 77 transitions. [2020-10-28 14:41:58,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 14:41:58,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:58,459 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:41:58,459 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 14:41:58,459 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:58,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:58,459 INFO L82 PathProgramCache]: Analyzing trace with hash 875817494, now seen corresponding path program 8 times [2020-10-28 14:41:58,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:58,460 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218225800] [2020-10-28 14:41:58,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:58,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:58,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:58,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:58,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 14:41:58,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:41:58,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 407 [2020-10-28 14:41:58,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:58,884 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:58,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:58,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:41:58,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:41:58,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:58,925 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:41:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:58,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:58,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:41:58,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:58,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:41:58,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:58,932 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:58,932 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:58,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:41:58,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:58,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:58,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:41:58,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:58,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:59,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:59,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:41:59,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:59,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 14:41:59,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:59,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:59,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:41:59,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:41:59,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:41:59,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:41:59,072 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2020-10-28 14:41:59,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:59,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:59,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:41:59,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:41:59,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:41:59,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:41:59,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:41:59,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:41:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:41:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 14:41:59,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:41:59,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:41:59,088 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 1 proven. 11 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-28 14:41:59,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218225800] [2020-10-28 14:41:59,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:41:59,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 14:41:59,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849424921] [2020-10-28 14:41:59,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 14:41:59,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:41:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 14:41:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-28 14:41:59,090 INFO L87 Difference]: Start difference. First operand 63 states and 77 transitions. Second operand 9 states. [2020-10-28 14:41:59,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:41:59,408 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2020-10-28 14:41:59,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 14:41:59,409 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-28 14:41:59,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:41:59,411 INFO L225 Difference]: With dead ends: 90 [2020-10-28 14:41:59,411 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 14:41:59,412 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-28 14:41:59,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 14:41:59,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 58. [2020-10-28 14:41:59,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-28 14:41:59,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 69 transitions. [2020-10-28 14:41:59,423 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 69 transitions. Word has length 39 [2020-10-28 14:41:59,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:41:59,423 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 69 transitions. [2020-10-28 14:41:59,424 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 14:41:59,424 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 69 transitions. [2020-10-28 14:41:59,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-28 14:41:59,424 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:41:59,424 INFO L422 BasicCegarLoop]: trace histogram [7, 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] [2020-10-28 14:41:59,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 14:41:59,425 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:41:59,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:41:59,425 INFO L82 PathProgramCache]: Analyzing trace with hash -655789652, now seen corresponding path program 9 times [2020-10-28 14:41:59,425 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:41:59,426 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2057221155] [2020-10-28 14:41:59,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:41:59,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:41:59,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:41:59,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:00,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-28 14:42:00,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:00,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 758 [2020-10-28 14:42:00,203 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:00,203 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:00,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:42:00,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:42:00,203 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:42:00,203 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:42:00,318 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:00,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:00,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,324 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:00,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:00,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:00,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:00,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:00,325 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:00,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:00,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:00,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:00,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:00,346 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:42:00,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:00,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,417 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:00,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:42:00,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:00,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 65 [2020-10-28 14:42:00,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:00,418 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:00,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:42:00,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:00,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:42:00,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:00,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:42:00,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:00,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:00,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:00,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 14:42:00,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:00,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 14:42:00,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:00,688 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:42:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:00,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:42:00,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:01,154 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:01,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2057221155] [2020-10-28 14:42:01,155 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:01,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:42:01,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917504831] [2020-10-28 14:42:01,156 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:42:01,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:01,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:42:01,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=304, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:42:01,157 INFO L87 Difference]: Start difference. First operand 58 states and 69 transitions. Second operand 19 states. [2020-10-28 14:42:03,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:03,239 INFO L93 Difference]: Finished difference Result 85 states and 97 transitions. [2020-10-28 14:42:03,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:42:03,241 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 40 [2020-10-28 14:42:03,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:03,242 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:42:03,242 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 14:42:03,243 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:42:03,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 14:42:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2020-10-28 14:42:03,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-28 14:42:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 71 transitions. [2020-10-28 14:42:03,262 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 71 transitions. Word has length 40 [2020-10-28 14:42:03,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:03,262 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 71 transitions. [2020-10-28 14:42:03,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:42:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 71 transitions. [2020-10-28 14:42:03,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:42:03,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:03,263 INFO L422 BasicCegarLoop]: trace histogram [8, 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] [2020-10-28 14:42:03,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 14:42:03,263 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:03,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:03,264 INFO L82 PathProgramCache]: Analyzing trace with hash -133478853, now seen corresponding path program 10 times [2020-10-28 14:42:03,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:03,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111016936] [2020-10-28 14:42:03,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:03,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:03,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:03,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:04,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:04,136 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:42:04,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:04,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 853 [2020-10-28 14:42:04,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:04,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:42:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:42:04,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:42:04,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:04,277 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:04,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:04,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:04,282 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:04,282 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:04,282 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:04,282 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:04,282 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:04,283 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:04,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:04,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:04,283 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:04,283 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:04,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:42:04,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:04,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:04,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:04,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:42:04,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:04,366 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 55 [2020-10-28 14:42:04,366 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:04,366 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:42:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:04,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:42:04,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:04,646 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:42:04,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:04,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:04,768 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:04,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 14:42:04,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:04,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-28 14:42:04,769 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:04,769 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:42:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:04,769 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:42:04,769 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 41 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:05,444 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111016936] [2020-10-28 14:42:05,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:05,444 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:42:05,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393211345] [2020-10-28 14:42:05,444 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:42:05,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:05,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:42:05,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:42:05,445 INFO L87 Difference]: Start difference. First operand 59 states and 71 transitions. Second operand 20 states. [2020-10-28 14:42:07,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:07,920 INFO L93 Difference]: Finished difference Result 89 states and 102 transitions. [2020-10-28 14:42:07,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:42:07,921 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 41 [2020-10-28 14:42:07,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:07,922 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:42:07,923 INFO L226 Difference]: Without dead ends: 83 [2020-10-28 14:42:07,924 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=113, Invalid=943, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 14:42:07,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-28 14:42:07,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-28 14:42:07,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:42:07,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2020-10-28 14:42:07,935 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 41 [2020-10-28 14:42:07,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:07,935 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2020-10-28 14:42:07,935 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:42:07,935 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2020-10-28 14:42:07,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 14:42:07,936 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:07,936 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 14:42:07,936 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 14:42:07,936 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:07,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:07,937 INFO L82 PathProgramCache]: Analyzing trace with hash -907347416, now seen corresponding path program 2 times [2020-10-28 14:42:07,937 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:07,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865536591] [2020-10-28 14:42:07,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:07,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:08,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:08,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:08,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 14:42:08,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:08,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 445 [2020-10-28 14:42:08,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:08,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:42:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:08,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:42:08,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:08,465 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:08,470 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:08,473 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:08,473 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:08,473 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:08,473 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:42:08,474 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:08,474 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:08,474 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:08,474 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:08,493 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:42:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:08,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:08,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:08,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:08,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:08,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 14:42:08,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:08,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:42:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:08,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:42:08,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:08,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:42:08,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:08,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:08,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:08,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 12 [2020-10-28 14:42:08,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:08,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:42:08,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:08,719 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:42:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:08,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 14:42:08,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:08,891 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:42:08,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865536591] [2020-10-28 14:42:08,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:08,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 14:42:08,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562471148] [2020-10-28 14:42:08,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 14:42:08,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:08,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 14:42:08,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:42:08,893 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand 15 states. [2020-10-28 14:42:09,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:09,764 INFO L93 Difference]: Finished difference Result 74 states and 86 transitions. [2020-10-28 14:42:09,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 14:42:09,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 41 [2020-10-28 14:42:09,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:09,766 INFO L225 Difference]: With dead ends: 74 [2020-10-28 14:42:09,766 INFO L226 Difference]: Without dead ends: 65 [2020-10-28 14:42:09,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:42:09,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-28 14:42:09,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 60. [2020-10-28 14:42:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 14:42:09,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2020-10-28 14:42:09,777 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 41 [2020-10-28 14:42:09,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:09,778 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2020-10-28 14:42:09,778 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 14:42:09,778 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2020-10-28 14:42:09,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:42:09,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:09,778 INFO L422 BasicCegarLoop]: trace histogram [9, 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] [2020-10-28 14:42:09,779 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 14:42:09,779 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:09,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:09,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1121713268, now seen corresponding path program 11 times [2020-10-28 14:42:09,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:09,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668905907] [2020-10-28 14:42:09,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:09,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:09,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:09,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:10,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:42:10,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:10,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 679 [2020-10-28 14:42:10,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:10,476 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:42:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:42:10,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:42:10,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:10,577 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:10,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:10,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:10,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:10,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:10,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:10,606 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:42:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:10,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,669 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:10,669 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:42:10,670 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:10,670 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 14:42:10,670 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:10,670 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:10,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:42:10,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:10,670 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:42:10,671 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:10,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:42:10,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:10,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:10,983 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:10,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:10,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:10,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 78 [2020-10-28 14:42:10,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:10,984 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:10,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:42:10,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:10,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:42:10,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:11,762 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:11,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668905907] [2020-10-28 14:42:11,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:11,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:42:11,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064367426] [2020-10-28 14:42:11,763 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:42:11,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:11,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:42:11,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:42:11,764 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand 21 states. [2020-10-28 14:42:13,716 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 96 [2020-10-28 14:42:14,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:14,755 INFO L93 Difference]: Finished difference Result 90 states and 103 transitions. [2020-10-28 14:42:14,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:42:14,756 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 42 [2020-10-28 14:42:14,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:14,757 INFO L225 Difference]: With dead ends: 90 [2020-10-28 14:42:14,758 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 14:42:14,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=186, Invalid=1374, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:42:14,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 14:42:14,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 61. [2020-10-28 14:42:14,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 14:42:14,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-28 14:42:14,782 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 42 [2020-10-28 14:42:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:14,782 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-28 14:42:14,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:42:14,783 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-28 14:42:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-28 14:42:14,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:14,783 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:14,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 14:42:14,784 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash 658165055, now seen corresponding path program 3 times [2020-10-28 14:42:14,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:14,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1496788316] [2020-10-28 14:42:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:14,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:14,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:14,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:15,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-28 14:42:15,387 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:15,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 583 [2020-10-28 14:42:15,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:15,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:42:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:15,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 14:42:15,388 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:15,446 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:15,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:15,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,452 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:15,452 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:15,452 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:15,452 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:15,452 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:15,452 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:15,452 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:15,453 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:15,453 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:15,475 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:42:15,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:15,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:15,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:15,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:15,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-28 14:42:15,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:15,584 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:42:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:15,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:42:15,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:15,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:42:15,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:15,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:15,613 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:15,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:42:15,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:15,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:42:15,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:15,613 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:15,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:42:15,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:15,614 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:42:15,614 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:15,710 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 14:42:15,711 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1496788316] [2020-10-28 14:42:15,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:15,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 14:42:15,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121097765] [2020-10-28 14:42:15,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 14:42:15,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:15,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 14:42:15,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2020-10-28 14:42:15,712 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 12 states. [2020-10-28 14:42:16,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:16,370 INFO L93 Difference]: Finished difference Result 80 states and 97 transitions. [2020-10-28 14:42:16,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 14:42:16,371 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 42 [2020-10-28 14:42:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:16,373 INFO L225 Difference]: With dead ends: 80 [2020-10-28 14:42:16,373 INFO L226 Difference]: Without dead ends: 74 [2020-10-28 14:42:16,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:42:16,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-28 14:42:16,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 68. [2020-10-28 14:42:16,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:42:16,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 85 transitions. [2020-10-28 14:42:16,386 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 85 transitions. Word has length 42 [2020-10-28 14:42:16,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:16,386 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 85 transitions. [2020-10-28 14:42:16,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 14:42:16,386 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 85 transitions. [2020-10-28 14:42:16,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:42:16,389 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:16,389 INFO L422 BasicCegarLoop]: trace histogram [10, 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] [2020-10-28 14:42:16,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 14:42:16,390 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:16,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:16,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1692209061, now seen corresponding path program 12 times [2020-10-28 14:42:16,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:16,390 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216861648] [2020-10-28 14:42:16,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:16,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:16,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:16,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:17,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:17,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:42:17,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:17,237 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 823 [2020-10-28 14:42:17,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:17,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:42:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:42:17,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:42:17,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:17,388 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:17,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:17,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:17,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:17,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:17,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:17,394 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:17,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:17,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:17,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:17,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:17,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:17,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:17,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:42:17,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:17,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:17,480 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:17,480 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:42:17,480 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:17,480 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 58 [2020-10-28 14:42:17,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:17,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:42:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:17,481 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:42:17,481 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:17,777 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:42:17,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:17,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 86 [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:17,871 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:42:17,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:18,839 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:18,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216861648] [2020-10-28 14:42:18,840 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:18,840 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:42:18,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388194326] [2020-10-28 14:42:18,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:42:18,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:18,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:42:18,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:42:18,842 INFO L87 Difference]: Start difference. First operand 68 states and 85 transitions. Second operand 22 states. [2020-10-28 14:42:22,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:22,046 INFO L93 Difference]: Finished difference Result 98 states and 122 transitions. [2020-10-28 14:42:22,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:42:22,047 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 43 [2020-10-28 14:42:22,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:22,049 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:42:22,049 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 14:42:22,050 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=129, Invalid=1203, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 14:42:22,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 14:42:22,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-28 14:42:22,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 14:42:22,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 87 transitions. [2020-10-28 14:42:22,064 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 87 transitions. Word has length 43 [2020-10-28 14:42:22,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:22,064 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 87 transitions. [2020-10-28 14:42:22,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:42:22,064 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 87 transitions. [2020-10-28 14:42:22,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 14:42:22,065 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:22,065 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:22,065 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 14:42:22,065 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:22,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:22,066 INFO L82 PathProgramCache]: Analyzing trace with hash 1944411400, now seen corresponding path program 4 times [2020-10-28 14:42:22,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:22,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [943254265] [2020-10-28 14:42:22,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:22,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:22,093 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:22,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:22,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:22,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-28 14:42:22,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:22,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 467 [2020-10-28 14:42:22,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:22,552 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:22,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:42:22,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:42:22,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 14:42:22,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:22,925 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-28 14:42:23,236 WARN L193 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2020-10-28 14:42:23,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:23,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:23,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:23,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:23,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:23,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:23,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:23,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:23,264 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:23,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:23,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:23,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:23,287 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:42:23,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:23,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:23,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:23,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:23,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:23,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-28 14:42:23,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:23,386 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:42:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:23,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:42:23,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:23,784 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-28 14:42:23,991 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-28 14:42:23,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:42:24,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:24,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:24,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:24,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 14:42:24,044 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:24,044 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-28 14:42:24,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:24,045 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:24,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:42:24,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:24,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:42:24,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:24,574 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 42 [2020-10-28 14:42:24,779 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 44 [2020-10-28 14:42:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:42:24,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [943254265] [2020-10-28 14:42:24,793 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:24,793 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:42:24,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386939055] [2020-10-28 14:42:24,795 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:42:24,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:24,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:42:24,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:42:24,796 INFO L87 Difference]: Start difference. First operand 69 states and 87 transitions. Second operand 17 states. [2020-10-28 14:42:25,393 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-28 14:42:26,184 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 89 [2020-10-28 14:42:26,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:26,478 INFO L93 Difference]: Finished difference Result 93 states and 120 transitions. [2020-10-28 14:42:26,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 14:42:26,479 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 43 [2020-10-28 14:42:26,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:26,481 INFO L225 Difference]: With dead ends: 93 [2020-10-28 14:42:26,481 INFO L226 Difference]: Without dead ends: 87 [2020-10-28 14:42:26,482 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:42:26,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-28 14:42:26,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 82. [2020-10-28 14:42:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-28 14:42:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 108 transitions. [2020-10-28 14:42:26,495 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 108 transitions. Word has length 43 [2020-10-28 14:42:26,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:26,495 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 108 transitions. [2020-10-28 14:42:26,495 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:42:26,495 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 108 transitions. [2020-10-28 14:42:26,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:42:26,496 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:26,496 INFO L422 BasicCegarLoop]: trace histogram [11, 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] [2020-10-28 14:42:26,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 14:42:26,497 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:26,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:26,497 INFO L82 PathProgramCache]: Analyzing trace with hash 2097257836, now seen corresponding path program 13 times [2020-10-28 14:42:26,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:26,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [804047880] [2020-10-28 14:42:26,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:26,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:26,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:27,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:27,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:42:27,380 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:27,380 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 865 [2020-10-28 14:42:27,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:27,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:27,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:42:27,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:42:27,381 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:42:27,381 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:27,496 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:27,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:27,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:27,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:27,504 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:27,504 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:27,504 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:42:27,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:27,505 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:27,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:27,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:27,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:27,505 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:27,528 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:42:27,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:27,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:27,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:27,606 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:42:27,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:27,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 66 [2020-10-28 14:42:27,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:27,606 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:27,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:42:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:27,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:42:27,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:27,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:42:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:27,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:27,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:27,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:42:27,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:27,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 14:42:27,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:27,981 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:27,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:42:27,981 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:27,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:42:27,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:28,989 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 0 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 14:42:28,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [804047880] [2020-10-28 14:42:28,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:28,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:42:28,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106481667] [2020-10-28 14:42:28,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:42:28,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:28,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:42:28,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=460, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:42:28,991 INFO L87 Difference]: Start difference. First operand 82 states and 108 transitions. Second operand 23 states. [2020-10-28 14:42:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:32,250 INFO L93 Difference]: Finished difference Result 110 states and 155 transitions. [2020-10-28 14:42:32,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:42:32,253 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-10-28 14:42:32,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:32,257 INFO L225 Difference]: With dead ends: 110 [2020-10-28 14:42:32,257 INFO L226 Difference]: Without dead ends: 104 [2020-10-28 14:42:32,258 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=144, Invalid=1338, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 14:42:32,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-28 14:42:32,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 83. [2020-10-28 14:42:32,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 14:42:32,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2020-10-28 14:42:32,284 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 44 [2020-10-28 14:42:32,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:32,284 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2020-10-28 14:42:32,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:42:32,284 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2020-10-28 14:42:32,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-28 14:42:32,287 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:32,287 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:32,287 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 14:42:32,287 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:32,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:32,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1131624865, now seen corresponding path program 5 times [2020-10-28 14:42:32,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:32,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1967845237] [2020-10-28 14:42:32,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:32,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:32,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:33,710 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:33,711 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-28 14:42:33,711 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:33,711 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1405 [2020-10-28 14:42:33,711 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:33,711 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:42:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:42:33,712 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:42:33,712 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:42:34,008 WARN L193 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-28 14:42:34,217 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 43 [2020-10-28 14:42:34,244 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:34,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:34,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:34,251 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:34,251 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:34,251 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:34,251 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:34,251 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:34,251 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:34,252 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:34,252 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:34,276 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:42:34,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:34,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:34,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:34,389 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:34,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:34,389 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 103 [2020-10-28 14:42:34,389 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:34,390 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:34,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:42:34,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:34,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:42:34,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:34,746 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-28 14:42:34,944 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 42 [2020-10-28 14:42:34,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:42:34,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:34,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:35,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:35,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:42:35,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:35,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 47 [2020-10-28 14:42:35,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:35,001 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:35,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:42:35,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:42:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:35,520 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-28 14:42:35,696 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 51 [2020-10-28 14:42:35,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:42:35,839 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1967845237] [2020-10-28 14:42:35,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:35,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 14:42:35,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849898977] [2020-10-28 14:42:35,839 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 14:42:35,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:35,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 14:42:35,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2020-10-28 14:42:35,840 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand 18 states. [2020-10-28 14:42:36,445 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-28 14:42:37,522 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 92 [2020-10-28 14:42:37,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:37,874 INFO L93 Difference]: Finished difference Result 97 states and 126 transitions. [2020-10-28 14:42:37,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 14:42:37,875 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 44 [2020-10-28 14:42:37,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:37,877 INFO L225 Difference]: With dead ends: 97 [2020-10-28 14:42:37,877 INFO L226 Difference]: Without dead ends: 91 [2020-10-28 14:42:37,878 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:42:37,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-28 14:42:37,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 83. [2020-10-28 14:42:37,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-28 14:42:37,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 110 transitions. [2020-10-28 14:42:37,892 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 110 transitions. Word has length 44 [2020-10-28 14:42:37,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:37,892 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 110 transitions. [2020-10-28 14:42:37,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 14:42:37,892 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 110 transitions. [2020-10-28 14:42:37,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:42:37,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:37,893 INFO L422 BasicCegarLoop]: trace histogram [12, 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] [2020-10-28 14:42:37,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 14:42:37,894 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash -688352645, now seen corresponding path program 14 times [2020-10-28 14:42:37,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:37,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [28145419] [2020-10-28 14:42:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:37,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:37,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:37,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:38,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:38,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:42:38,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:38,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 986 [2020-10-28 14:42:38,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:38,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:42:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:42:38,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:42:38,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:38,961 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:38,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:38,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:38,967 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:38,968 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:38,968 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:38,968 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:42:38,968 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:38,968 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:38,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:38,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:38,969 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:38,969 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:38,989 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2020-10-28 14:42:38,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:38,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:39,047 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:39,047 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:42:39,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:39,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 14:42:39,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:39,047 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:39,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:42:39,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:39,048 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:42:39,048 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:39,188 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2020-10-28 14:42:39,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:39,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:39,244 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:39,244 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:42:39,245 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:39,245 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 48 [2020-10-28 14:42:39,245 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:39,245 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:39,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 14:42:39,245 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:39,246 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:42:39,246 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2020-10-28 14:42:39,372 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [28145419] [2020-10-28 14:42:39,372 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:39,372 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 14:42:39,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835134543] [2020-10-28 14:42:39,373 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 14:42:39,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:39,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 14:42:39,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=210, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:42:39,373 INFO L87 Difference]: Start difference. First operand 83 states and 110 transitions. Second operand 16 states. [2020-10-28 14:42:40,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:40,137 INFO L93 Difference]: Finished difference Result 89 states and 115 transitions. [2020-10-28 14:42:40,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:42:40,138 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 45 [2020-10-28 14:42:40,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:40,139 INFO L225 Difference]: With dead ends: 89 [2020-10-28 14:42:40,139 INFO L226 Difference]: Without dead ends: 77 [2020-10-28 14:42:40,140 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=72, Invalid=480, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:42:40,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-28 14:42:40,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2020-10-28 14:42:40,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:42:40,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2020-10-28 14:42:40,152 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 45 [2020-10-28 14:42:40,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:40,152 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2020-10-28 14:42:40,152 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 14:42:40,152 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2020-10-28 14:42:40,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:42:40,153 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:40,153 INFO L422 BasicCegarLoop]: trace histogram [6, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:40,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 14:42:40,154 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:40,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:40,154 INFO L82 PathProgramCache]: Analyzing trace with hash -1999468568, now seen corresponding path program 6 times [2020-10-28 14:42:40,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:40,154 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2101453939] [2020-10-28 14:42:40,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:40,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:40,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:40,307 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:41,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:41,510 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:42:41,510 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:41,510 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1339 [2020-10-28 14:42:41,510 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:41,511 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:42:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:42:41,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 14:42:41,511 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:42,084 WARN L193 SmtUtils]: Spent 430.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 73 [2020-10-28 14:42:42,590 WARN L193 SmtUtils]: Spent 485.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 81 [2020-10-28 14:42:42,618 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:42,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:42,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:42,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:42,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:42,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:42,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:42,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:42,624 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:42,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:42,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:42,652 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:42:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:42,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:42,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:42,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:42,772 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:42,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-10-28 14:42:42,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:42,772 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:42,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:42:42,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:42,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:42:42,773 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:43,385 WARN L193 SmtUtils]: Spent 353.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 48 [2020-10-28 14:42:43,752 WARN L193 SmtUtils]: Spent 323.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 44 [2020-10-28 14:42:43,756 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:42:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:43,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:43,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:42:43,822 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:44,383 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 61 [2020-10-28 14:42:44,601 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2020-10-28 14:42:44,821 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 67 [2020-10-28 14:42:45,014 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2020-10-28 14:42:45,035 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:42:45,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2101453939] [2020-10-28 14:42:45,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:45,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:42:45,035 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594031611] [2020-10-28 14:42:45,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:42:45,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:45,036 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:42:45,036 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:42:45,037 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand 19 states. [2020-10-28 14:42:45,672 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 14:42:46,539 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 89 [2020-10-28 14:42:47,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:47,247 INFO L93 Difference]: Finished difference Result 86 states and 105 transitions. [2020-10-28 14:42:47,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:42:47,249 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 45 [2020-10-28 14:42:47,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:47,250 INFO L225 Difference]: With dead ends: 86 [2020-10-28 14:42:47,250 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 14:42:47,250 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=100, Invalid=770, Unknown=0, NotChecked=0, Total=870 [2020-10-28 14:42:47,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 14:42:47,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-28 14:42:47,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 14:42:47,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2020-10-28 14:42:47,262 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 45 [2020-10-28 14:42:47,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:47,262 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2020-10-28 14:42:47,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:42:47,262 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2020-10-28 14:42:47,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:42:47,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:47,263 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:47,263 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 14:42:47,263 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:47,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:47,264 INFO L82 PathProgramCache]: Analyzing trace with hash -2045235916, now seen corresponding path program 2 times [2020-10-28 14:42:47,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:47,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1480494687] [2020-10-28 14:42:47,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:47,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:47,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:47,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:47,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:47,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:47,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:48,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:48,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:48,863 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:42:48,863 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:42:48,863 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1587 [2020-10-28 14:42:48,863 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:48,864 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:48,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:42:48,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 14:42:48,864 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:42:48,864 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:48,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:48,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:48,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:48,924 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:48,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:48,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:48,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 14:42:48,925 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:48,925 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:48,925 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:48,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:48,926 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:48,947 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:42:48,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:48,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:49,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:49,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:49,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:49,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 14:42:49,014 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:49,014 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:49,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:42:49,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:49,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:42:49,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:49,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 14:42:49,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:49,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:49,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:49,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:42:49,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:49,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:42:49,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:49,092 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 14:42:49,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:49,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:49,098 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-28 14:42:49,098 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1480494687] [2020-10-28 14:42:49,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:49,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:42:49,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161826661] [2020-10-28 14:42:49,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:42:49,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:49,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:42:49,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:42:49,100 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand 11 states. [2020-10-28 14:42:49,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:49,504 INFO L93 Difference]: Finished difference Result 106 states and 132 transitions. [2020-10-28 14:42:49,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:42:49,504 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-28 14:42:49,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:49,506 INFO L225 Difference]: With dead ends: 106 [2020-10-28 14:42:49,508 INFO L226 Difference]: Without dead ends: 80 [2020-10-28 14:42:49,509 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:42:49,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-28 14:42:49,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 73. [2020-10-28 14:42:49,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-28 14:42:49,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 92 transitions. [2020-10-28 14:42:49,531 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 92 transitions. Word has length 45 [2020-10-28 14:42:49,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:49,531 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 92 transitions. [2020-10-28 14:42:49,531 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:42:49,532 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 92 transitions. [2020-10-28 14:42:49,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 14:42:49,533 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:49,534 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:49,534 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 14:42:49,534 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:49,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:49,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1974971766, now seen corresponding path program 7 times [2020-10-28 14:42:49,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:49,536 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1089682160] [2020-10-28 14:42:49,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:49,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:49,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:49,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:50,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 14:42:50,339 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:50,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-28 14:42:50,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:50,339 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:50,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:42:50,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 14:42:50,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:42:50,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:50,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:50,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:50,385 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,387 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:50,388 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:50,388 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:50,388 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:50,388 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:50,388 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:50,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:50,388 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:50,389 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:50,389 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:50,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:42:50,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:50,430 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,491 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:50,492 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:50,492 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:50,492 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-28 14:42:50,492 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:50,492 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:42:50,492 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:50,493 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:42:50,493 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:50,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 14:42:50,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:50,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:50,618 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:50,618 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:42:50,618 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:50,618 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 19 [2020-10-28 14:42:50,618 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:50,619 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:42:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:50,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:42:50,619 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:50,731 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:42:50,731 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1089682160] [2020-10-28 14:42:50,732 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:50,732 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:42:50,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345717688] [2020-10-28 14:42:50,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:42:50,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:50,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:42:50,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:42:50,736 INFO L87 Difference]: Start difference. First operand 73 states and 92 transitions. Second operand 17 states. [2020-10-28 14:42:51,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:51,533 INFO L93 Difference]: Finished difference Result 82 states and 100 transitions. [2020-10-28 14:42:51,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:42:51,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 45 [2020-10-28 14:42:51,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:51,535 INFO L225 Difference]: With dead ends: 82 [2020-10-28 14:42:51,535 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:42:51,535 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=97, Invalid=659, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:42:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:42:51,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-10-28 14:42:51,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:42:51,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-10-28 14:42:51,548 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 45 [2020-10-28 14:42:51,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:51,548 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-10-28 14:42:51,548 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:42:51,549 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-10-28 14:42:51,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:42:51,549 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:51,549 INFO L422 BasicCegarLoop]: trace histogram [7, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:51,550 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 14:42:51,550 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:51,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:51,550 INFO L82 PathProgramCache]: Analyzing trace with hash 1162147711, now seen corresponding path program 8 times [2020-10-28 14:42:51,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:51,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1196086958] [2020-10-28 14:42:51,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:51,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:51,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:52,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:52,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:42:52,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:52,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1257 [2020-10-28 14:42:52,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:52,826 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:52,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:42:52,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:42:52,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 14:42:52,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:53,028 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-28 14:42:53,203 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 68 [2020-10-28 14:42:53,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:53,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:53,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:53,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:53,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:53,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:53,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:42:53,237 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:53,237 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:53,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:53,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:53,263 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:42:53,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:53,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:53,377 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:53,377 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:42:53,377 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-28 14:42:53,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:53,378 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:42:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:53,378 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:42:53,378 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:53,791 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-28 14:42:54,011 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2020-10-28 14:42:54,014 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:42:54,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:54,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:54,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:54,083 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 17 [2020-10-28 14:42:54,083 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:54,083 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-10-28 14:42:54,083 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:54,083 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:54,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:42:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 14:42:54,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:54,600 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-28 14:42:54,798 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 14:42:54,994 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-28 14:42:55,224 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2020-10-28 14:42:55,405 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-28 14:42:55,426 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:42:55,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1196086958] [2020-10-28 14:42:55,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:55,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:42:55,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387221518] [2020-10-28 14:42:55,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:42:55,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:55,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:42:55,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:42:55,428 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 20 states. [2020-10-28 14:42:56,081 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 88 [2020-10-28 14:42:57,359 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 14:42:57,714 WARN L193 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 94 [2020-10-28 14:42:58,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:58,061 INFO L93 Difference]: Finished difference Result 92 states and 113 transitions. [2020-10-28 14:42:58,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:42:58,062 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 46 [2020-10-28 14:42:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:58,063 INFO L225 Difference]: With dead ends: 92 [2020-10-28 14:42:58,064 INFO L226 Difference]: Without dead ends: 86 [2020-10-28 14:42:58,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=107, Invalid=885, Unknown=0, NotChecked=0, Total=992 [2020-10-28 14:42:58,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-28 14:42:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 72. [2020-10-28 14:42:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:42:58,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 90 transitions. [2020-10-28 14:42:58,078 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 90 transitions. Word has length 46 [2020-10-28 14:42:58,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:58,078 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 90 transitions. [2020-10-28 14:42:58,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:42:58,078 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 90 transitions. [2020-10-28 14:42:58,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-28 14:42:58,079 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:58,079 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:58,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 14:42:58,079 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:58,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:58,080 INFO L82 PathProgramCache]: Analyzing trace with hash 1919639780, now seen corresponding path program 9 times [2020-10-28 14:42:58,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:58,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [936280311] [2020-10-28 14:42:58,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:58,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:58,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:58,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:58,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:58,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-28 14:42:58,788 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:42:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 694 [2020-10-28 14:42:58,788 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:58,788 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:42:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:58,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 14:42:58,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:58,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:42:58,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:58,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:58,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:58,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:42:58,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:58,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:42:58,843 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:58,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:58,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:58,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:42:58,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:58,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:42:58,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:42:58,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:58,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:58,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:58,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:42:58,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:58,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-28 14:42:58,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:58,946 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:42:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:42:58,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:42:58,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:42:59,039 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2020-10-28 14:42:59,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:59,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:59,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:42:59,048 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 14:42:59,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:42:59,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:42:59,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:42:59,049 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:42:59,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:42:59,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:42:59,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:42:59,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:42:59,059 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 1 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 14:42:59,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [936280311] [2020-10-28 14:42:59,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:42:59,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 14:42:59,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524329273] [2020-10-28 14:42:59,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 14:42:59,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:42:59,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 14:42:59,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-28 14:42:59,061 INFO L87 Difference]: Start difference. First operand 72 states and 90 transitions. Second operand 11 states. [2020-10-28 14:42:59,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:42:59,597 INFO L93 Difference]: Finished difference Result 102 states and 123 transitions. [2020-10-28 14:42:59,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 14:42:59,597 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 46 [2020-10-28 14:42:59,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:42:59,598 INFO L225 Difference]: With dead ends: 102 [2020-10-28 14:42:59,598 INFO L226 Difference]: Without dead ends: 75 [2020-10-28 14:42:59,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-28 14:42:59,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-28 14:42:59,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 67. [2020-10-28 14:42:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-28 14:42:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 82 transitions. [2020-10-28 14:42:59,612 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 82 transitions. Word has length 46 [2020-10-28 14:42:59,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:42:59,612 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 82 transitions. [2020-10-28 14:42:59,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 14:42:59,612 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 82 transitions. [2020-10-28 14:42:59,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-28 14:42:59,613 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:42:59,613 INFO L422 BasicCegarLoop]: trace histogram [8, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:42:59,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 14:42:59,613 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:42:59,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:42:59,614 INFO L82 PathProgramCache]: Analyzing trace with hash 388004552, now seen corresponding path program 10 times [2020-10-28 14:42:59,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:42:59,614 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1630554347] [2020-10-28 14:42:59,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:42:59,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:42:59,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:42:59,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:00,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:00,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 14:43:00,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:00,650 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1018 [2020-10-28 14:43:00,650 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:00,650 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:43:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:00,650 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:43:00,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:01,321 WARN L193 SmtUtils]: Spent 597.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 76 [2020-10-28 14:43:01,922 WARN L193 SmtUtils]: Spent 575.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 72 [2020-10-28 14:43:01,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:01,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:01,955 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:01,955 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:01,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:01,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:01,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:01,956 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:01,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:01,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:01,978 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:43:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:01,989 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:02,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:02,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:43:02,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:02,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-28 14:43:02,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:02,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:43:02,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:02,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:43:02,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:02,387 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2020-10-28 14:43:02,687 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-10-28 14:43:02,971 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 41 [2020-10-28 14:43:02,974 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:43:02,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:02,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:03,034 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:03,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-28 14:43:03,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:03,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 53 [2020-10-28 14:43:03,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:03,035 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:03,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 14:43:03,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:43:03,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:43:03,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:03,689 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 43 [2020-10-28 14:43:03,855 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 48 [2020-10-28 14:43:04,030 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-28 14:43:04,390 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-28 14:43:04,604 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 82 [2020-10-28 14:43:04,855 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 68 [2020-10-28 14:43:04,880 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:43:04,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1630554347] [2020-10-28 14:43:04,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:04,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 14:43:04,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565670032] [2020-10-28 14:43:04,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 14:43:04,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:04,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 14:43:04,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2020-10-28 14:43:04,882 INFO L87 Difference]: Start difference. First operand 67 states and 82 transitions. Second operand 21 states. [2020-10-28 14:43:05,527 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 79 [2020-10-28 14:43:06,926 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-28 14:43:07,210 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 114 [2020-10-28 14:43:07,735 WARN L193 SmtUtils]: Spent 404.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 121 [2020-10-28 14:43:08,182 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:08,182 INFO L93 Difference]: Finished difference Result 94 states and 110 transitions. [2020-10-28 14:43:08,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 14:43:08,185 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-10-28 14:43:08,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:08,185 INFO L225 Difference]: With dead ends: 94 [2020-10-28 14:43:08,185 INFO L226 Difference]: Without dead ends: 88 [2020-10-28 14:43:08,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 14:43:08,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-28 14:43:08,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2020-10-28 14:43:08,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-28 14:43:08,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2020-10-28 14:43:08,200 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 47 [2020-10-28 14:43:08,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:08,200 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2020-10-28 14:43:08,200 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 14:43:08,201 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2020-10-28 14:43:08,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:43:08,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:08,201 INFO L422 BasicCegarLoop]: trace histogram [9, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:08,202 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 14:43:08,202 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:08,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:08,202 INFO L82 PathProgramCache]: Analyzing trace with hash -2135596897, now seen corresponding path program 11 times [2020-10-28 14:43:08,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:08,202 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366277345] [2020-10-28 14:43:08,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:08,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:08,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:09,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:09,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:43:09,017 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:09,017 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 798 [2020-10-28 14:43:09,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:09,017 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 14:43:09,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:09,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:43:09,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:09,456 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-28 14:43:09,812 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 82 [2020-10-28 14:43:09,840 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:09,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:09,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:09,845 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:09,845 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:09,845 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:09,845 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:09,845 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:09,845 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:09,845 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:09,846 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:09,846 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:09,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:43:09,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:09,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:10,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:10,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:43:10,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:10,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-28 14:43:10,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:10,011 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:10,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:43:10,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:10,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:43:10,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:10,317 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 20 [2020-10-28 14:43:10,520 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 31 [2020-10-28 14:43:10,834 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 27 [2020-10-28 14:43:10,837 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:43:10,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:10,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:10,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:10,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:43:10,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:10,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 110 [2020-10-28 14:43:10,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:10,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 14:43:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:43:10,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 14:43:10,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 14:43:11,648 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-28 14:43:11,990 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-28 14:43:12,176 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 59 [2020-10-28 14:43:12,369 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-28 14:43:12,555 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:43:12,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366277345] [2020-10-28 14:43:12,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:12,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 14:43:12,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471173956] [2020-10-28 14:43:12,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 14:43:12,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:12,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 14:43:12,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2020-10-28 14:43:12,557 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand 22 states. [2020-10-28 14:43:15,162 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 108 [2020-10-28 14:43:15,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:15,672 INFO L93 Difference]: Finished difference Result 98 states and 115 transitions. [2020-10-28 14:43:15,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 14:43:15,673 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 48 [2020-10-28 14:43:15,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:15,674 INFO L225 Difference]: With dead ends: 98 [2020-10-28 14:43:15,675 INFO L226 Difference]: Without dead ends: 92 [2020-10-28 14:43:15,676 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=123, Invalid=1137, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 14:43:15,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-28 14:43:15,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-28 14:43:15,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-28 14:43:15,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 86 transitions. [2020-10-28 14:43:15,691 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 86 transitions. Word has length 48 [2020-10-28 14:43:15,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:15,691 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 86 transitions. [2020-10-28 14:43:15,691 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 14:43:15,691 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 86 transitions. [2020-10-28 14:43:15,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:43:15,692 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:15,692 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:15,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 14:43:15,693 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -875004466, now seen corresponding path program 3 times [2020-10-28 14:43:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:15,694 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [839802871] [2020-10-28 14:43:15,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:15,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:15,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:15,732 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:15,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:16,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:16,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:16,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:20,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:20,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:43:20,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 14:43:20,708 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 14:43:20,708 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:20,709 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 14:43:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:20,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:43:20,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:20,758 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:20,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:20,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:20,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:20,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:20,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:43:20,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:20,765 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:20,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:20,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:20,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:20,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:20,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:43:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:20,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:20,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:20,813 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:43:20,813 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:20,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-28 14:43:20,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:20,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:20,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:20,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-28 14:43:20,814 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:20,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:20,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 14:43:20,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:20,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:20,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:20,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:43:20,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 14:43:20,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:20,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 10 [2020-10-28 14:43:20,827 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:20,827 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:20,843 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-28 14:43:20,843 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [839802871] [2020-10-28 14:43:20,843 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:20,843 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 14:43:20,843 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467727675] [2020-10-28 14:43:20,844 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 14:43:20,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:20,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 14:43:20,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 14:43:20,844 INFO L87 Difference]: Start difference. First operand 69 states and 86 transitions. Second operand 8 states. [2020-10-28 14:43:21,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:21,240 INFO L93 Difference]: Finished difference Result 135 states and 170 transitions. [2020-10-28 14:43:21,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 14:43:21,240 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 48 [2020-10-28 14:43:21,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:21,241 INFO L225 Difference]: With dead ends: 135 [2020-10-28 14:43:21,242 INFO L226 Difference]: Without dead ends: 85 [2020-10-28 14:43:21,242 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=133, Unknown=0, NotChecked=0, Total=210 [2020-10-28 14:43:21,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-28 14:43:21,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 71. [2020-10-28 14:43:21,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:43:21,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 88 transitions. [2020-10-28 14:43:21,265 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 88 transitions. Word has length 48 [2020-10-28 14:43:21,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:21,265 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 88 transitions. [2020-10-28 14:43:21,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 14:43:21,265 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 88 transitions. [2020-10-28 14:43:21,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-28 14:43:21,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:21,266 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:21,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 14:43:21,267 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:21,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:21,267 INFO L82 PathProgramCache]: Analyzing trace with hash -30998964, now seen corresponding path program 12 times [2020-10-28 14:43:21,267 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:21,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337343744] [2020-10-28 14:43:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:21,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:21,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:21,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:21,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-28 14:43:21,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:21,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 595 [2020-10-28 14:43:21,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:21,882 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:21,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:43:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-28 14:43:21,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 14:43:21,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:22,154 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 34 [2020-10-28 14:43:22,354 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-28 14:43:22,379 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:22,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:22,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:22,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:22,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:22,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:22,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:22,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:22,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:22,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:22,409 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:43:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:22,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:22,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:22,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:43:22,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:22,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-28 14:43:22,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:22,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:22,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:43:22,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:22,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:43:22,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:22,869 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 14:43:22,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:22,876 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:22,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:22,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-10-28 14:43:22,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:22,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 29 [2020-10-28 14:43:22,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:22,902 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:43:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:43:22,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 14:43:22,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:23,296 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 30 [2020-10-28 14:43:23,632 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2020-10-28 14:43:23,786 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2020-10-28 14:43:23,800 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:43:23,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337343744] [2020-10-28 14:43:23,801 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:23,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 14:43:23,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600646715] [2020-10-28 14:43:23,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 14:43:23,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:23,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 14:43:23,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2020-10-28 14:43:23,802 INFO L87 Difference]: Start difference. First operand 71 states and 88 transitions. Second operand 17 states. [2020-10-28 14:43:24,512 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-28 14:43:24,965 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2020-10-28 14:43:25,198 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 76 [2020-10-28 14:43:25,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:25,398 INFO L93 Difference]: Finished difference Result 85 states and 101 transitions. [2020-10-28 14:43:25,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 14:43:25,398 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 48 [2020-10-28 14:43:25,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:25,399 INFO L225 Difference]: With dead ends: 85 [2020-10-28 14:43:25,400 INFO L226 Difference]: Without dead ends: 76 [2020-10-28 14:43:25,401 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=107, Invalid=649, Unknown=0, NotChecked=0, Total=756 [2020-10-28 14:43:25,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-28 14:43:25,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 71. [2020-10-28 14:43:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-28 14:43:25,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-28 14:43:25,415 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 48 [2020-10-28 14:43:25,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:25,416 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-28 14:43:25,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 14:43:25,416 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-28 14:43:25,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:43:25,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:25,417 INFO L422 BasicCegarLoop]: trace histogram [10, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:25,417 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 14:43:25,417 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:25,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:25,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1237136808, now seen corresponding path program 13 times [2020-10-28 14:43:25,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:25,418 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702832667] [2020-10-28 14:43:25,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:25,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:25,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:25,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:26,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:26,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:43:26,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:26,284 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 850 [2020-10-28 14:43:26,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:26,285 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 14:43:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:26,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:43:26,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:27,050 WARN L193 SmtUtils]: Spent 687.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 114 [2020-10-28 14:43:27,816 WARN L193 SmtUtils]: Spent 739.00 ms on a formula simplification. DAG size of input: 184 DAG size of output: 116 [2020-10-28 14:43:27,844 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:27,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:27,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:27,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:27,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:27,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:27,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:27,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:27,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:27,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:27,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:43:27,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:27,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:27,970 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:27,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:43:27,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:27,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-28 14:43:27,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:27,971 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:27,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:43:27,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:27,971 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:43:27,971 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:28,384 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2020-10-28 14:43:28,607 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 46 [2020-10-28 14:43:28,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:43:28,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:28,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:28,692 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:28,692 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-10-28 14:43:28,692 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:28,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 74 [2020-10-28 14:43:28,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:28,693 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 14:43:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:43:28,693 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 14:43:28,693 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:29,337 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2020-10-28 14:43:29,561 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2020-10-28 14:43:29,794 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 55 [2020-10-28 14:43:30,045 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-28 14:43:30,378 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-28 14:43:30,721 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 76 [2020-10-28 14:43:31,178 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 78 [2020-10-28 14:43:31,468 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 67 [2020-10-28 14:43:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 67 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:43:31,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702832667] [2020-10-28 14:43:31,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:31,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 14:43:31,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973677579] [2020-10-28 14:43:31,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 14:43:31,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:31,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 14:43:31,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2020-10-28 14:43:31,501 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 23 states. [2020-10-28 14:43:32,281 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 86 [2020-10-28 14:43:33,713 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2020-10-28 14:43:33,996 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-28 14:43:34,301 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 107 [2020-10-28 14:43:34,619 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-28 14:43:35,048 WARN L193 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 111 [2020-10-28 14:43:35,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:35,596 INFO L93 Difference]: Finished difference Result 101 states and 118 transitions. [2020-10-28 14:43:35,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 14:43:35,597 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 49 [2020-10-28 14:43:35,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:35,598 INFO L225 Difference]: With dead ends: 101 [2020-10-28 14:43:35,598 INFO L226 Difference]: Without dead ends: 95 [2020-10-28 14:43:35,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=131, Invalid=1275, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 14:43:35,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-28 14:43:35,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-28 14:43:35,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 14:43:35,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 89 transitions. [2020-10-28 14:43:35,615 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 89 transitions. Word has length 49 [2020-10-28 14:43:35,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:35,615 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 89 transitions. [2020-10-28 14:43:35,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 14:43:35,615 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 89 transitions. [2020-10-28 14:43:35,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 14:43:35,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:35,616 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:35,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 14:43:35,616 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:35,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:35,618 INFO L82 PathProgramCache]: Analyzing trace with hash 2055163291, now seen corresponding path program 14 times [2020-10-28 14:43:35,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:35,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1647883895] [2020-10-28 14:43:35,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:35,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:35,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:35,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 866 [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 14:43:36,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-28 14:43:36,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:36,562 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:36,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:36,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:36,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:36,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:36,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:36,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:36,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:36,566 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:36,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:36,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:36,586 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:43:36,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:36,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:36,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:36,644 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:43:36,645 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:36,649 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 14:43:36,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:36,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:36,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:36,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 14 [2020-10-28 14:43:36,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 25 [2020-10-28 14:43:36,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:36,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:43:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:36,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 14:43:36,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:36,796 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-28 14:43:36,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1647883895] [2020-10-28 14:43:36,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:36,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 14:43:36,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870281526] [2020-10-28 14:43:36,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 14:43:36,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:36,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 14:43:36,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2020-10-28 14:43:36,798 INFO L87 Difference]: Start difference. First operand 72 states and 89 transitions. Second operand 14 states. [2020-10-28 14:43:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:37,606 INFO L93 Difference]: Finished difference Result 95 states and 119 transitions. [2020-10-28 14:43:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 14:43:37,607 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 49 [2020-10-28 14:43:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:37,608 INFO L225 Difference]: With dead ends: 95 [2020-10-28 14:43:37,608 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 14:43:37,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:43:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 14:43:37,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 79. [2020-10-28 14:43:37,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-28 14:43:37,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 101 transitions. [2020-10-28 14:43:37,624 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 101 transitions. Word has length 49 [2020-10-28 14:43:37,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:37,624 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 101 transitions. [2020-10-28 14:43:37,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 14:43:37,624 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 101 transitions. [2020-10-28 14:43:37,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:43:37,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:37,625 INFO L422 BasicCegarLoop]: trace histogram [11, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:37,625 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 14:43:37,626 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:37,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:37,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1582300737, now seen corresponding path program 15 times [2020-10-28 14:43:37,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:37,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401358298] [2020-10-28 14:43:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:37,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:37,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:37,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:38,849 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1207 [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 14:43:38,850 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:39,579 WARN L193 SmtUtils]: Spent 662.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 118 [2020-10-28 14:43:40,219 WARN L193 SmtUtils]: Spent 617.00 ms on a formula simplification. DAG size of input: 195 DAG size of output: 117 [2020-10-28 14:43:40,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:40,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:40,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:40,256 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:40,256 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:40,256 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:40,256 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 14:43:40,256 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:40,256 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:40,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:40,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:40,257 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:40,257 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:40,282 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:43:40,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:40,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:40,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:40,385 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:43:40,385 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:40,385 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-28 14:43:40,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:40,385 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:43:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:40,386 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:43:40,386 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:40,841 WARN L193 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 47 [2020-10-28 14:43:41,080 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 39 [2020-10-28 14:43:41,084 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:43:41,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:41,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:41,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:41,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 21 [2020-10-28 14:43:41,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:41,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 129 [2020-10-28 14:43:41,224 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:41,224 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:41,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 14:43:41,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:43:41,225 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:43:41,225 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:41,698 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2020-10-28 14:43:41,861 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-28 14:43:42,026 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-28 14:43:42,227 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 45 [2020-10-28 14:43:42,486 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-28 14:43:42,721 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-28 14:43:43,049 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 57 [2020-10-28 14:43:43,410 WARN L193 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 68 [2020-10-28 14:43:43,688 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 72 [2020-10-28 14:43:43,949 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 65 [2020-10-28 14:43:43,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:43:43,994 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401358298] [2020-10-28 14:43:43,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:43:43,995 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 14:43:43,995 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788233135] [2020-10-28 14:43:43,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 14:43:43,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:43:43,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 14:43:43,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2020-10-28 14:43:43,997 INFO L87 Difference]: Start difference. First operand 79 states and 101 transitions. Second operand 24 states. [2020-10-28 14:43:44,741 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 80 [2020-10-28 14:43:47,220 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 99 [2020-10-28 14:43:47,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:43:47,825 INFO L93 Difference]: Finished difference Result 109 states and 138 transitions. [2020-10-28 14:43:47,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 14:43:47,826 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 50 [2020-10-28 14:43:47,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:43:47,827 INFO L225 Difference]: With dead ends: 109 [2020-10-28 14:43:47,827 INFO L226 Difference]: Without dead ends: 103 [2020-10-28 14:43:47,829 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=139, Invalid=1421, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 14:43:47,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-28 14:43:47,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-28 14:43:47,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-28 14:43:47,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 103 transitions. [2020-10-28 14:43:47,846 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 103 transitions. Word has length 50 [2020-10-28 14:43:47,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:43:47,847 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 103 transitions. [2020-10-28 14:43:47,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 14:43:47,847 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 103 transitions. [2020-10-28 14:43:47,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-28 14:43:47,848 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:43:47,848 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:43:47,848 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 14:43:47,848 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:43:47,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:43:47,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1993283540, now seen corresponding path program 16 times [2020-10-28 14:43:47,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:43:47,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657596852] [2020-10-28 14:43:47,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:43:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:47,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:48,263 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:48,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:48,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-28 14:43:48,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:43:48,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 822 [2020-10-28 14:43:48,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:48,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:43:48,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:43:48,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 14:43:48,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:54,246 WARN L193 SmtUtils]: Spent 5.09 s on a formula simplification. DAG size of input: 508 DAG size of output: 57 [2020-10-28 14:43:59,354 WARN L193 SmtUtils]: Spent 5.03 s on a formula simplification. DAG size of input: 508 DAG size of output: 58 [2020-10-28 14:43:59,382 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:43:59,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:59,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:59,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:59,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:43:59,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:59,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:43:59,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:59,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:59,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:43:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:59,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:43:59,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:43:59,421 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:43:59,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:43:59,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:43:59,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:43:59,714 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:43:59,714 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:43:59,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 283 [2020-10-28 14:43:59,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:43:59,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:43:59,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:43:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:43:59,715 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:43:59,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:00,175 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 28 [2020-10-28 14:44:00,811 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 58 [2020-10-28 14:44:01,479 WARN L193 SmtUtils]: Spent 602.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 64 [2020-10-28 14:44:02,160 WARN L193 SmtUtils]: Spent 606.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 65 [2020-10-28 14:44:02,167 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 14:44:02,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:02,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:02,210 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:02,210 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 15 [2020-10-28 14:44:02,210 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:02,210 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-28 14:44:02,210 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:02,210 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:02,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 14:44:02,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:44:02,211 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 14:44:02,211 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:02,589 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 44 [2020-10-28 14:44:02,798 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-28 14:44:03,141 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 63 [2020-10-28 14:44:03,536 WARN L193 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 55 [2020-10-28 14:44:03,560 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:44:03,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657596852] [2020-10-28 14:44:03,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:03,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 14:44:03,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715190840] [2020-10-28 14:44:03,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 14:44:03,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:03,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 14:44:03,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2020-10-28 14:44:03,563 INFO L87 Difference]: Start difference. First operand 80 states and 103 transitions. Second operand 19 states. [2020-10-28 14:44:04,849 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 125 DAG size of output: 125 [2020-10-28 14:44:05,701 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 94 [2020-10-28 14:44:06,117 WARN L193 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-28 14:44:06,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:06,500 INFO L93 Difference]: Finished difference Result 104 states and 137 transitions. [2020-10-28 14:44:06,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 14:44:06,500 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 50 [2020-10-28 14:44:06,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:06,502 INFO L225 Difference]: With dead ends: 104 [2020-10-28 14:44:06,502 INFO L226 Difference]: Without dead ends: 98 [2020-10-28 14:44:06,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 15.5s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2020-10-28 14:44:06,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-28 14:44:06,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 93. [2020-10-28 14:44:06,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-28 14:44:06,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 125 transitions. [2020-10-28 14:44:06,522 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 125 transitions. Word has length 50 [2020-10-28 14:44:06,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:06,523 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 125 transitions. [2020-10-28 14:44:06,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 14:44:06,523 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 125 transitions. [2020-10-28 14:44:06,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:44:06,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:06,524 INFO L422 BasicCegarLoop]: trace histogram [12, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:06,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-28 14:44:06,524 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:06,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:06,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1209448584, now seen corresponding path program 17 times [2020-10-28 14:44:06,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:06,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1457938029] [2020-10-28 14:44:06,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:06,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:06,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:06,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:07,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:07,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:44:07,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:07,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1097 [2020-10-28 14:44:07,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:07,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 14:44:07,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:44:07,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 14:44:07,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:08,087 WARN L193 SmtUtils]: Spent 382.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 104 [2020-10-28 14:44:08,489 WARN L193 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 103 [2020-10-28 14:44:08,520 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:08,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:08,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:08,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:08,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:08,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:08,524 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:08,524 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:08,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:08,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:08,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:08,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:44:08,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:08,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:08,687 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:08,687 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:44:08,687 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:08,687 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 127 [2020-10-28 14:44:08,687 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:08,687 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:44:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:08,688 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:44:08,688 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:08,959 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 28 [2020-10-28 14:44:09,389 WARN L193 SmtUtils]: Spent 378.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 53 [2020-10-28 14:44:09,744 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 51 [2020-10-28 14:44:09,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:44:09,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:09,873 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:09,874 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:44:09,874 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:09,874 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-10-28 14:44:09,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:09,874 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:09,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 14:44:09,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:44:09,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 14:44:09,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:10,705 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2020-10-28 14:44:10,884 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 55 [2020-10-28 14:44:11,070 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-28 14:44:11,266 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 63 [2020-10-28 14:44:11,505 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 67 [2020-10-28 14:44:11,989 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:44:11,989 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1457938029] [2020-10-28 14:44:11,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:11,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 14:44:11,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969688944] [2020-10-28 14:44:11,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 14:44:11,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:11,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 14:44:11,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2020-10-28 14:44:11,991 INFO L87 Difference]: Start difference. First operand 93 states and 125 transitions. Second operand 25 states. [2020-10-28 14:44:12,868 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 97 [2020-10-28 14:44:15,559 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification that was a NOOP. DAG size: 110 [2020-10-28 14:44:16,226 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 111 [2020-10-28 14:44:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:17,018 INFO L93 Difference]: Finished difference Result 121 states and 172 transitions. [2020-10-28 14:44:17,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 14:44:17,019 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 51 [2020-10-28 14:44:17,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:17,020 INFO L225 Difference]: With dead ends: 121 [2020-10-28 14:44:17,020 INFO L226 Difference]: Without dead ends: 115 [2020-10-28 14:44:17,021 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2020-10-28 14:44:17,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-28 14:44:17,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-28 14:44:17,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 14:44:17,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2020-10-28 14:44:17,044 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 51 [2020-10-28 14:44:17,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:17,044 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2020-10-28 14:44:17,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 14:44:17,044 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2020-10-28 14:44:17,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 14:44:17,045 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:17,046 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:17,046 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-28 14:44:17,046 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:17,046 INFO L82 PathProgramCache]: Analyzing trace with hash 1353883579, now seen corresponding path program 18 times [2020-10-28 14:44:17,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:17,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [888381395] [2020-10-28 14:44:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:17,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:17,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:17,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:18,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:18,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 14:44:18,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:18,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1120 [2020-10-28 14:44:18,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:18,186 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:18,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:44:18,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:44:18,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 14:44:18,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:21,740 WARN L193 SmtUtils]: Spent 3.30 s on a formula simplification. DAG size of input: 379 DAG size of output: 81 [2020-10-28 14:44:24,882 WARN L193 SmtUtils]: Spent 3.07 s on a formula simplification. DAG size of input: 379 DAG size of output: 67 [2020-10-28 14:44:24,913 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:24,921 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:24,922 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:24,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:44:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:24,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 169 [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:44:25,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:25,783 WARN L193 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 24 [2020-10-28 14:44:27,697 WARN L193 SmtUtils]: Spent 1.77 s on a formula simplification. DAG size of input: 486 DAG size of output: 71 [2020-10-28 14:44:29,493 WARN L193 SmtUtils]: Spent 1.69 s on a formula simplification. DAG size of input: 294 DAG size of output: 49 [2020-10-28 14:44:31,284 WARN L193 SmtUtils]: Spent 1.66 s on a formula simplification. DAG size of input: 294 DAG size of output: 53 [2020-10-28 14:44:31,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2020-10-28 14:44:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:31,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:31,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:31,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 16 [2020-10-28 14:44:31,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:31,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-28 14:44:31,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:31,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 14:44:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:44:31,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 14:44:31,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:32,059 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 42 [2020-10-28 14:44:32,380 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 58 [2020-10-28 14:44:32,627 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-28 14:44:32,847 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 51 [2020-10-28 14:44:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 43 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 14:44:32,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [888381395] [2020-10-28 14:44:32,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:32,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 14:44:32,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836031769] [2020-10-28 14:44:32,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 14:44:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 14:44:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2020-10-28 14:44:32,874 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand 20 states. [2020-10-28 14:44:33,686 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification that was a NOOP. DAG size: 98 [2020-10-28 14:44:35,004 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 98 [2020-10-28 14:44:35,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:35,421 INFO L93 Difference]: Finished difference Result 108 states and 143 transitions. [2020-10-28 14:44:35,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 14:44:35,422 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 51 [2020-10-28 14:44:35,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:35,424 INFO L225 Difference]: With dead ends: 108 [2020-10-28 14:44:35,424 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 14:44:35,425 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 15.0s TimeCoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2020-10-28 14:44:35,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 14:44:35,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 94. [2020-10-28 14:44:35,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-28 14:44:35,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 127 transitions. [2020-10-28 14:44:35,447 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 127 transitions. Word has length 51 [2020-10-28 14:44:35,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:35,447 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 127 transitions. [2020-10-28 14:44:35,448 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 14:44:35,448 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 127 transitions. [2020-10-28 14:44:35,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:44:35,449 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:35,449 INFO L422 BasicCegarLoop]: trace histogram [13, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:35,449 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-28 14:44:35,449 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:35,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:35,450 INFO L82 PathProgramCache]: Analyzing trace with hash 1854331615, now seen corresponding path program 19 times [2020-10-28 14:44:35,450 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:35,450 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1943023726] [2020-10-28 14:44:35,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:35,480 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:35,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:36,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:36,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:44:36,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:36,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1404 [2020-10-28 14:44:36,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:36,873 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 14:44:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 14:44:36,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 14:44:36,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:37,366 WARN L193 SmtUtils]: Spent 402.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 110 [2020-10-28 14:44:37,941 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 199 DAG size of output: 106 [2020-10-28 14:44:37,973 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:37,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:37,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:37,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:37,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:37,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:37,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 14:44:37,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:37,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:37,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:37,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:37,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:37,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:38,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2020-10-28 14:44:38,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:38,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:38,078 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:38,078 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-10-28 14:44:38,078 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:38,078 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-28 14:44:38,078 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:38,078 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:38,078 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 14:44:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:38,079 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 14:44:38,079 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:38,474 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-28 14:44:38,689 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-28 14:44:38,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2020-10-28 14:44:38,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:38,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:38,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 14:44:38,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:39,462 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2020-10-28 14:44:39,665 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-28 14:44:39,886 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 52 [2020-10-28 14:44:40,112 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-28 14:44:40,353 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-28 14:44:40,605 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 64 [2020-10-28 14:44:40,884 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 67 [2020-10-28 14:44:41,195 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 71 [2020-10-28 14:44:41,505 WARN L193 SmtUtils]: Spent 208.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 82 [2020-10-28 14:44:41,898 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 91 [2020-10-28 14:44:42,287 WARN L193 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 88 [2020-10-28 14:44:42,326 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 103 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 14:44:42,326 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1943023726] [2020-10-28 14:44:42,326 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 14:44:42,327 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 14:44:42,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226699157] [2020-10-28 14:44:42,327 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 14:44:42,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 14:44:42,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 14:44:42,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2020-10-28 14:44:42,328 INFO L87 Difference]: Start difference. First operand 94 states and 127 transitions. Second operand 26 states. [2020-10-28 14:44:43,177 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification that was a NOOP. DAG size: 72 [2020-10-28 14:44:45,957 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2020-10-28 14:44:46,284 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification that was a NOOP. DAG size: 113 [2020-10-28 14:44:46,609 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification that was a NOOP. DAG size: 120 [2020-10-28 14:44:47,179 WARN L193 SmtUtils]: Spent 407.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 129 [2020-10-28 14:44:47,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 14:44:47,990 INFO L93 Difference]: Finished difference Result 125 states and 178 transitions. [2020-10-28 14:44:47,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 14:44:47,991 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 52 [2020-10-28 14:44:47,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 14:44:47,992 INFO L225 Difference]: With dead ends: 125 [2020-10-28 14:44:47,993 INFO L226 Difference]: Without dead ends: 119 [2020-10-28 14:44:47,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2020-10-28 14:44:47,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-28 14:44:48,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 95. [2020-10-28 14:44:48,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-28 14:44:48,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 129 transitions. [2020-10-28 14:44:48,017 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 129 transitions. Word has length 52 [2020-10-28 14:44:48,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 14:44:48,018 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 129 transitions. [2020-10-28 14:44:48,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 14:44:48,018 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 129 transitions. [2020-10-28 14:44:48,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-28 14:44:48,019 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 14:44:48,019 INFO L422 BasicCegarLoop]: trace histogram [7, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 14:44:48,019 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-28 14:44:48,019 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 14:44:48,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 14:44:48,020 INFO L82 PathProgramCache]: Analyzing trace with hash 2036849164, now seen corresponding path program 20 times [2020-10-28 14:44:48,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 14:44:48,020 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [394592309] [2020-10-28 14:44:48,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 14:44:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:48,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:48,156 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:49,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1384 [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 14:44:49,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:51,822 WARN L193 SmtUtils]: Spent 2.14 s on a formula simplification. DAG size of input: 373 DAG size of output: 61 [2020-10-28 14:44:54,024 WARN L193 SmtUtils]: Spent 2.16 s on a formula simplification. DAG size of input: 373 DAG size of output: 58 [2020-10-28 14:44:54,053 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 14:44:54,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:54,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:54,062 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:54,062 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 14:44:54,062 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:54,062 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 14:44:54,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:54,063 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:54,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 14:44:54,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:54,063 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 14:44:54,063 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:54,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2020-10-28 14:44:54,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 14:44:54,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 14:44:54,232 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 140 [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 14:44:54,233 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 14:44:55,009 WARN L193 SmtUtils]: Spent 219.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 26 [2020-10-28 14:44:57,133 WARN L193 SmtUtils]: Spent 2.01 s on a formula simplification. DAG size of input: 338 DAG size of output: 42