/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=DEEPEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-buckets-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 19:46:21,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 19:46:21,540 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 19:46:21,597 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 19:46:21,598 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 19:46:21,605 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 19:46:21,607 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 19:46:21,612 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 19:46:21,616 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 19:46:21,622 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 19:46:21,623 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 19:46:21,624 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 19:46:21,625 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 19:46:21,628 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 19:46:21,630 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 19:46:21,631 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 19:46:21,633 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 19:46:21,636 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 19:46:21,643 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 19:46:21,651 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 19:46:21,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 19:46:21,671 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 19:46:21,673 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 19:46:21,675 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 19:46:21,684 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 19:46:21,684 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 19:46:21,685 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 19:46:21,686 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 19:46:21,687 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 19:46:21,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 19:46:21,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 19:46:21,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 19:46:21,693 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 19:46:21,694 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 19:46:21,695 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 19:46:21,695 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 19:46:21,696 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 19:46:21,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 19:46:21,697 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 19:46:21,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 19:46:21,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 19:46:21,699 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 [2020-10-27 19:46:21,725 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 19:46:21,726 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 19:46:21,727 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 19:46:21,728 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 19:46:21,728 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 19:46:21,728 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 19:46:21,729 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 19:46:21,729 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 19:46:21,729 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 19:46:21,729 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 19:46:21,729 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 19:46:21,730 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 19:46:21,730 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 19:46:21,730 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 19:46:21,730 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 19:46:21,731 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 19:46:21,731 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 19:46:21,731 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 19:46:21,732 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 19:46:21,732 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 19:46:21,732 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 19:46:21,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:21,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 19:46:21,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 19:46:21,734 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 19:46:21,734 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 19:46:21,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 19:46:21,735 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 19:46:21,735 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 19:46:21,735 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 19:46:22,090 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 19:46:22,120 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 19:46:22,123 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 19:46:22,124 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 19:46:22,125 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 19:46:22,126 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-buckets-1.i [2020-10-27 19:46:22,208 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376da43bd/b392ce34481a43e4adc08bb97700173e/FLAG1caf7f347 [2020-10-27 19:46:22,932 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 19:46:22,933 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-buckets-1.i [2020-10-27 19:46:22,951 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376da43bd/b392ce34481a43e4adc08bb97700173e/FLAG1caf7f347 [2020-10-27 19:46:23,188 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/376da43bd/b392ce34481a43e4adc08bb97700173e [2020-10-27 19:46:23,191 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 19:46:23,198 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 19:46:23,200 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:23,200 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 19:46:23,204 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 19:46:23,205 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,209 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@35e69acf and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23, skipping insertion in model container [2020-10-27 19:46:23,209 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,217 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 19:46:23,256 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 19:46:23,627 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:23,639 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 19:46:23,693 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 19:46:23,758 INFO L208 MainTranslator]: Completed translation [2020-10-27 19:46:23,759 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23 WrapperNode [2020-10-27 19:46:23,759 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 19:46:23,760 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 19:46:23,760 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 19:46:23,761 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 19:46:23,773 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,774 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,790 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,790 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,811 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,819 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,824 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (1/1) ... [2020-10-27 19:46:23,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 19:46:23,832 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 19:46:23,832 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 19:46:23,833 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 19:46:23,833 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 19:46:23,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 19:46:23,932 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 19:46:23,932 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 19:46:23,932 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 19:46:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 19:46:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 19:46:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 19:46:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 19:46:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 19:46:23,933 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 19:46:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 19:46:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 19:46:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 19:46:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 19:46:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 19:46:23,934 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 19:46:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 19:46:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 19:46:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 19:46:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 19:46:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 19:46:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 19:46:23,935 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 19:46:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 19:46:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 19:46:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 19:46:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 19:46:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 19:46:23,936 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 19:46:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 19:46:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 19:46:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 19:46:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 19:46:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 19:46:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 19:46:23,937 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 19:46:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 19:46:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 19:46:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 19:46:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 19:46:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 19:46:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 19:46:23,938 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 19:46:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 19:46:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 19:46:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 19:46:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 19:46:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 19:46:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 19:46:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 19:46:23,939 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 19:46:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 19:46:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 19:46:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 19:46:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 19:46:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 19:46:23,940 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 19:46:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 19:46:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 19:46:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 19:46:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 19:46:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 19:46:23,941 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 19:46:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 19:46:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 19:46:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 19:46:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 19:46:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 19:46:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 19:46:23,942 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 19:46:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 19:46:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 19:46:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 19:46:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 19:46:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 19:46:23,943 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 19:46:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 19:46:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 19:46:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 19:46:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 19:46:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 19:46:23,944 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 19:46:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 19:46:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 19:46:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 19:46:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 19:46:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 19:46:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 19:46:23,945 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 19:46:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 19:46:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 19:46:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 19:46:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 19:46:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 19:46:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 19:46:23,946 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 19:46:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 19:46:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 19:46:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 19:46:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 19:46:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 19:46:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 19:46:23,947 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 19:46:23,948 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 19:46:23,948 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 19:46:23,948 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 19:46:23,948 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 19:46:23,948 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 19:46:23,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 19:46:23,948 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 19:46:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 19:46:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 19:46:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 19:46:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 19:46:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 19:46:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 19:46:23,949 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 19:46:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 19:46:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 19:46:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 19:46:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 19:46:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 19:46:23,950 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 19:46:24,684 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 19:46:24,684 INFO L298 CfgBuilder]: Removed 15 assume(true) statements. [2020-10-27 19:46:24,686 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:24 BoogieIcfgContainer [2020-10-27 19:46:24,686 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 19:46:24,688 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 19:46:24,688 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 19:46:24,692 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 19:46:24,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 07:46:23" (1/3) ... [2020-10-27 19:46:24,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3dd74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:24, skipping insertion in model container [2020-10-27 19:46:24,693 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 07:46:23" (2/3) ... [2020-10-27 19:46:24,693 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4f3dd74d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 07:46:24, skipping insertion in model container [2020-10-27 19:46:24,694 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 07:46:24" (3/3) ... [2020-10-27 19:46:24,695 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-buckets-1.i [2020-10-27 19:46:24,707 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 19:46:24,713 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 19:46:24,726 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 19:46:24,753 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 19:46:24,753 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 19:46:24,753 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 19:46:24,753 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 19:46:24,753 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 19:46:24,754 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 19:46:24,754 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 19:46:24,754 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 19:46:24,772 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states. [2020-10-27 19:46:24,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-27 19:46:24,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:24,779 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:24,780 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:24,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:24,786 INFO L82 PathProgramCache]: Analyzing trace with hash -2031057720, now seen corresponding path program 1 times [2020-10-27 19:46:24,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:24,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209063635] [2020-10-27 19:46:24,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:24,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:25,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,386 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:25,387 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 22 [2020-10-27 19:46:25,389 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:25,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 390 [2020-10-27 19:46:25,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 19:46:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:25,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:25,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 19:46:25,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:25,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:25,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:25,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:25,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:25,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:25,553 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 17 [2020-10-27 19:46:25,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:25,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:25,554 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:25,554 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:25,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209063635] [2020-10-27 19:46:25,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:25,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 19:46:25,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33283968] [2020-10-27 19:46:25,588 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 19:46:25,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:25,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 19:46:25,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 19:46:25,611 INFO L87 Difference]: Start difference. First operand 54 states. Second operand 5 states. [2020-10-27 19:46:25,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:25,941 INFO L93 Difference]: Finished difference Result 120 states and 208 transitions. [2020-10-27 19:46:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 19:46:25,943 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 14 [2020-10-27 19:46:25,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:25,953 INFO L225 Difference]: With dead ends: 120 [2020-10-27 19:46:25,953 INFO L226 Difference]: Without dead ends: 67 [2020-10-27 19:46:25,957 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-27 19:46:25,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 44. [2020-10-27 19:46:25,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-27 19:46:26,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2020-10-27 19:46:26,002 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 14 [2020-10-27 19:46:26,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:26,002 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2020-10-27 19:46:26,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 19:46:26,002 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2020-10-27 19:46:26,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-27 19:46:26,003 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:26,003 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:26,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 19:46:26,004 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:26,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:26,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1948730651, now seen corresponding path program 1 times [2020-10-27 19:46:26,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:26,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [673443921] [2020-10-27 19:46:26,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:26,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,085 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,445 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 23 [2020-10-27 19:46:26,445 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:26,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-27 19:46:26,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:26,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:46:26,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 19:46:26,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 19:46:26,488 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:26,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:26,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:26,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:26,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:26,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:26,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:26,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:26,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [673443921] [2020-10-27 19:46:26,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:26,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:26,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319707030] [2020-10-27 19:46:26,504 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:26,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:26,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:26,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:26,527 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand 4 states. [2020-10-27 19:46:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:26,705 INFO L93 Difference]: Finished difference Result 51 states and 62 transitions. [2020-10-27 19:46:26,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:26,706 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-10-27 19:46:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:26,707 INFO L225 Difference]: With dead ends: 51 [2020-10-27 19:46:26,707 INFO L226 Difference]: Without dead ends: 47 [2020-10-27 19:46:26,708 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2020-10-27 19:46:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 43. [2020-10-27 19:46:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-27 19:46:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2020-10-27 19:46:26,717 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 15 [2020-10-27 19:46:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:26,718 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2020-10-27 19:46:26,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2020-10-27 19:46:26,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:26,719 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:26,719 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:26,719 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 19:46:26,719 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:26,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:26,720 INFO L82 PathProgramCache]: Analyzing trace with hash 314866980, now seen corresponding path program 1 times [2020-10-27 19:46:26,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:26,721 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307894020] [2020-10-27 19:46:26,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:26,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:26,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:26,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 133 [2020-10-27 19:46:26,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 19:46:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:26,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:26,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:26,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:26,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:26,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:26,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:26,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:26,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:26,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:26,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:26,967 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:26,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:26,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:26,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:26,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307894020] [2020-10-27 19:46:26,973 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:26,973 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 19:46:26,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96247562] [2020-10-27 19:46:26,974 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 19:46:26,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:26,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 19:46:26,975 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 19:46:26,975 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand 6 states. [2020-10-27 19:46:27,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:27,289 INFO L93 Difference]: Finished difference Result 67 states and 82 transitions. [2020-10-27 19:46:27,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:27,290 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 19:46:27,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:27,292 INFO L225 Difference]: With dead ends: 67 [2020-10-27 19:46:27,292 INFO L226 Difference]: Without dead ends: 54 [2020-10-27 19:46:27,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-27 19:46:27,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2020-10-27 19:46:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-27 19:46:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2020-10-27 19:46:27,302 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 16 [2020-10-27 19:46:27,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:27,303 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2020-10-27 19:46:27,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 19:46:27,303 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2020-10-27 19:46:27,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 19:46:27,304 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:27,304 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:27,304 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 19:46:27,304 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:27,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:27,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1947134467, now seen corresponding path program 1 times [2020-10-27 19:46:27,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:27,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1473623643] [2020-10-27 19:46:27,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,332 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 19:46:27,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:27,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 59 [2020-10-27 19:46:27,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 19:46:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:46:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-27 19:46:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,438 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:27,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:27,446 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:27,446 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:27,446 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:27,446 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:27,446 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:27,447 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:27,447 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:27,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1473623643] [2020-10-27 19:46:27,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:27,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 19:46:27,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562798013] [2020-10-27 19:46:27,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 19:46:27,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:27,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 19:46:27,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:27,453 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand 4 states. [2020-10-27 19:46:27,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:27,679 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2020-10-27 19:46:27,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 19:46:27,679 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 16 [2020-10-27 19:46:27,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:27,680 INFO L225 Difference]: With dead ends: 52 [2020-10-27 19:46:27,681 INFO L226 Difference]: Without dead ends: 48 [2020-10-27 19:46:27,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 19:46:27,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-27 19:46:27,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2020-10-27 19:46:27,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-27 19:46:27,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 57 transitions. [2020-10-27 19:46:27,696 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 57 transitions. Word has length 16 [2020-10-27 19:46:27,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:27,696 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 57 transitions. [2020-10-27 19:46:27,696 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 19:46:27,696 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 57 transitions. [2020-10-27 19:46:27,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 19:46:27,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:27,702 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:27,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 19:46:27,703 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:27,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:27,703 INFO L82 PathProgramCache]: Analyzing trace with hash 59150788, now seen corresponding path program 1 times [2020-10-27 19:46:27,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:27,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1681713260] [2020-10-27 19:46:27,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:27,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:27,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 19:46:28,036 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,036 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 266 [2020-10-27 19:46:28,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:28,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:28,037 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:28,037 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,311 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:28,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:28,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:28,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:28,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:28,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:28,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:28,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:28,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:28,328 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:28,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1681713260] [2020-10-27 19:46:28,328 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:28,328 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:28,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983399058] [2020-10-27 19:46:28,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:28,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:28,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:28,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:28,330 INFO L87 Difference]: Start difference. First operand 47 states and 57 transitions. Second operand 8 states. [2020-10-27 19:46:28,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:28,914 INFO L93 Difference]: Finished difference Result 68 states and 82 transitions. [2020-10-27 19:46:28,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:28,915 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 21 [2020-10-27 19:46:28,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:28,916 INFO L225 Difference]: With dead ends: 68 [2020-10-27 19:46:28,916 INFO L226 Difference]: Without dead ends: 55 [2020-10-27 19:46:28,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:28,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-27 19:46:28,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 52. [2020-10-27 19:46:28,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-27 19:46:28,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 62 transitions. [2020-10-27 19:46:28,925 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 62 transitions. Word has length 21 [2020-10-27 19:46:28,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:28,925 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 62 transitions. [2020-10-27 19:46:28,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:28,925 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 62 transitions. [2020-10-27 19:46:28,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 19:46:28,926 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:28,926 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:28,927 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 19:46:28,927 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:28,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:28,927 INFO L82 PathProgramCache]: Analyzing trace with hash -465827442, now seen corresponding path program 1 times [2020-10-27 19:46:28,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:28,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [992536325] [2020-10-27 19:46:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:28,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,504 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:29,505 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 19:46:29,505 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:29,505 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 552 [2020-10-27 19:46:29,505 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:29,505 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:29,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:29,506 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:46:29,506 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:29,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:29,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:29,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:29,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:29,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:29,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:29,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:29,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:29,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:29,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:29,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:29,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [992536325] [2020-10-27 19:46:29,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:29,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:29,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761635817] [2020-10-27 19:46:29,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:29,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:29,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:29,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:29,606 INFO L87 Difference]: Start difference. First operand 52 states and 62 transitions. Second operand 8 states. [2020-10-27 19:46:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:30,033 INFO L93 Difference]: Finished difference Result 103 states and 129 transitions. [2020-10-27 19:46:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:30,034 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 22 [2020-10-27 19:46:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:30,036 INFO L225 Difference]: With dead ends: 103 [2020-10-27 19:46:30,036 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 19:46:30,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:30,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 19:46:30,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 61. [2020-10-27 19:46:30,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-27 19:46:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 74 transitions. [2020-10-27 19:46:30,050 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 74 transitions. Word has length 22 [2020-10-27 19:46:30,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:30,051 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 74 transitions. [2020-10-27 19:46:30,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:30,051 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 74 transitions. [2020-10-27 19:46:30,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-27 19:46:30,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:30,057 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:30,058 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 19:46:30,058 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:30,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:30,058 INFO L82 PathProgramCache]: Analyzing trace with hash 311951251, now seen corresponding path program 2 times [2020-10-27 19:46:30,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:30,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [862134839] [2020-10-27 19:46:30,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:30,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,829 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,829 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-10-27 19:46:30,829 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 739 [2020-10-27 19:46:30,830 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:30,830 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-27 19:46:30,830 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:30,953 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:30,957 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:30,966 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:30,967 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:30,967 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:30,967 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 19:46:30,967 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:30,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:30,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:30,968 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:30,968 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:30,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [862134839] [2020-10-27 19:46:30,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:30,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:30,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575850757] [2020-10-27 19:46:30,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:30,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:30,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:30,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:30,979 INFO L87 Difference]: Start difference. First operand 61 states and 74 transitions. Second operand 8 states. [2020-10-27 19:46:31,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:31,573 INFO L93 Difference]: Finished difference Result 124 states and 154 transitions. [2020-10-27 19:46:31,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:31,574 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 24 [2020-10-27 19:46:31,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:31,576 INFO L225 Difference]: With dead ends: 124 [2020-10-27 19:46:31,576 INFO L226 Difference]: Without dead ends: 88 [2020-10-27 19:46:31,577 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:31,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-27 19:46:31,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 68. [2020-10-27 19:46:31,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-27 19:46:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 81 transitions. [2020-10-27 19:46:31,592 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 81 transitions. Word has length 24 [2020-10-27 19:46:31,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:31,592 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 81 transitions. [2020-10-27 19:46:31,592 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:31,593 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 81 transitions. [2020-10-27 19:46:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:31,593 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:31,594 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:31,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 19:46:31,594 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:31,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:31,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1979879590, now seen corresponding path program 1 times [2020-10-27 19:46:31,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:31,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211109386] [2020-10-27 19:46:31,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:31,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:31,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:31,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:32,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:32,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 735 [2020-10-27 19:46:32,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:32,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:32,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:32,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:32,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:32,550 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:32,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:32,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:32,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 19:46:32,550 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:32,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:32,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:32,551 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:32,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:32,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211109386] [2020-10-27 19:46:32,559 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:32,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:32,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328287694] [2020-10-27 19:46:32,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:32,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:32,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:32,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:32,563 INFO L87 Difference]: Start difference. First operand 68 states and 81 transitions. Second operand 10 states. [2020-10-27 19:46:33,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:33,636 INFO L93 Difference]: Finished difference Result 152 states and 190 transitions. [2020-10-27 19:46:33,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:33,637 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 25 [2020-10-27 19:46:33,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:33,638 INFO L225 Difference]: With dead ends: 152 [2020-10-27 19:46:33,639 INFO L226 Difference]: Without dead ends: 116 [2020-10-27 19:46:33,639 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:33,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-27 19:46:33,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2020-10-27 19:46:33,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-27 19:46:33,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 94 transitions. [2020-10-27 19:46:33,649 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 94 transitions. Word has length 25 [2020-10-27 19:46:33,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:33,650 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 94 transitions. [2020-10-27 19:46:33,650 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:33,650 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 94 transitions. [2020-10-27 19:46:33,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-27 19:46:33,651 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:33,651 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:33,651 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 19:46:33,651 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:33,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:33,652 INFO L82 PathProgramCache]: Analyzing trace with hash 1294019352, now seen corresponding path program 1 times [2020-10-27 19:46:33,652 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:33,652 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [830645312] [2020-10-27 19:46:33,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:33,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:33,886 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:33,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-10-27 19:46:33,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:33,887 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 214 [2020-10-27 19:46:33,887 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:33,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:33,887 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:33,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:33,888 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:34,019 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:34,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:34,022 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:34,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:34,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:34,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:34,027 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:34,027 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:34,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:34,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:34,028 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:34,036 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:34,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [830645312] [2020-10-27 19:46:34,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:34,037 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:34,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821455746] [2020-10-27 19:46:34,039 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:34,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:34,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:34,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:34,047 INFO L87 Difference]: Start difference. First operand 79 states and 94 transitions. Second operand 9 states. [2020-10-27 19:46:34,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:34,686 INFO L93 Difference]: Finished difference Result 127 states and 158 transitions. [2020-10-27 19:46:34,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:34,687 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 25 [2020-10-27 19:46:34,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:34,688 INFO L225 Difference]: With dead ends: 127 [2020-10-27 19:46:34,688 INFO L226 Difference]: Without dead ends: 123 [2020-10-27 19:46:34,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:34,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-27 19:46:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 81. [2020-10-27 19:46:34,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-27 19:46:34,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 97 transitions. [2020-10-27 19:46:34,712 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 97 transitions. Word has length 25 [2020-10-27 19:46:34,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:34,712 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 97 transitions. [2020-10-27 19:46:34,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:34,713 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 97 transitions. [2020-10-27 19:46:34,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 19:46:34,714 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:34,714 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:34,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 19:46:34,716 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:34,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:34,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1844994340, now seen corresponding path program 2 times [2020-10-27 19:46:34,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:34,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11349242] [2020-10-27 19:46:34,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:34,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:34,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,081 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:35,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 19:46:35,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:35,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 310 [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:35,082 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:35,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:35,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:35,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:35,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:35,495 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:35,495 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:35,496 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:35,496 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:35,496 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:35,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:35,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11349242] [2020-10-27 19:46:35,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:35,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:35,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630699051] [2020-10-27 19:46:35,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:35,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:35,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:35,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:35,507 INFO L87 Difference]: Start difference. First operand 81 states and 97 transitions. Second operand 10 states. [2020-10-27 19:46:36,004 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 70 [2020-10-27 19:46:36,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:36,496 INFO L93 Difference]: Finished difference Result 103 states and 121 transitions. [2020-10-27 19:46:36,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:36,500 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 26 [2020-10-27 19:46:36,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:36,501 INFO L225 Difference]: With dead ends: 103 [2020-10-27 19:46:36,501 INFO L226 Difference]: Without dead ends: 90 [2020-10-27 19:46:36,502 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:36,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-27 19:46:36,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2020-10-27 19:46:36,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-27 19:46:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 102 transitions. [2020-10-27 19:46:36,515 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 102 transitions. Word has length 26 [2020-10-27 19:46:36,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:36,518 INFO L481 AbstractCegarLoop]: Abstraction has 86 states and 102 transitions. [2020-10-27 19:46:36,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 102 transitions. [2020-10-27 19:46:36,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:36,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:36,523 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:36,523 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 19:46:36,523 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:36,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:36,524 INFO L82 PathProgramCache]: Analyzing trace with hash 1301750367, now seen corresponding path program 2 times [2020-10-27 19:46:36,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:36,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689394841] [2020-10-27 19:46:36,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:36,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,567 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:36,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-27 19:46:36,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:46:36,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:36,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 19:46:36,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,894 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:36,897 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:36,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:36,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:36,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:36,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:36,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:36,901 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:36,908 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:46:36,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689394841] [2020-10-27 19:46:36,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:36,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:46:36,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509100545] [2020-10-27 19:46:36,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:46:36,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:36,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:46:36,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:46:36,910 INFO L87 Difference]: Start difference. First operand 86 states and 102 transitions. Second operand 9 states. [2020-10-27 19:46:37,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:37,782 INFO L93 Difference]: Finished difference Result 149 states and 183 transitions. [2020-10-27 19:46:37,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:46:37,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 27 [2020-10-27 19:46:37,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:37,784 INFO L225 Difference]: With dead ends: 149 [2020-10-27 19:46:37,784 INFO L226 Difference]: Without dead ends: 111 [2020-10-27 19:46:37,785 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:46:37,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-27 19:46:37,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 82. [2020-10-27 19:46:37,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:46:37,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 97 transitions. [2020-10-27 19:46:37,793 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 97 transitions. Word has length 27 [2020-10-27 19:46:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:37,794 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 97 transitions. [2020-10-27 19:46:37,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:46:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 97 transitions. [2020-10-27 19:46:37,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 19:46:37,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:37,795 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:37,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 19:46:37,796 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:37,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:37,796 INFO L82 PathProgramCache]: Analyzing trace with hash -692394339, now seen corresponding path program 2 times [2020-10-27 19:46:37,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:37,797 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256381007] [2020-10-27 19:46:37,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:37,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:37,830 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,045 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:38,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 19:46:38,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:38,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 228 [2020-10-27 19:46:38,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:38,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:38,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:38,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:38,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:38,229 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:38,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:38,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:38,237 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:38,237 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:38,237 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:38,238 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:38,238 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:38,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:38,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:38,238 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:38,238 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:38,246 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:38,246 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256381007] [2020-10-27 19:46:38,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:38,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:38,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458360491] [2020-10-27 19:46:38,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:38,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:38,250 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:38,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:38,250 INFO L87 Difference]: Start difference. First operand 82 states and 97 transitions. Second operand 10 states. [2020-10-27 19:46:39,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:39,386 INFO L93 Difference]: Finished difference Result 148 states and 181 transitions. [2020-10-27 19:46:39,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:39,387 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 27 [2020-10-27 19:46:39,387 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:39,388 INFO L225 Difference]: With dead ends: 148 [2020-10-27 19:46:39,389 INFO L226 Difference]: Without dead ends: 112 [2020-10-27 19:46:39,390 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:46:39,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-27 19:46:39,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-27 19:46:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-27 19:46:39,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 94 transitions. [2020-10-27 19:46:39,402 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 94 transitions. Word has length 27 [2020-10-27 19:46:39,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:39,402 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 94 transitions. [2020-10-27 19:46:39,402 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:39,402 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 94 transitions. [2020-10-27 19:46:39,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 19:46:39,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:39,406 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:39,406 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 19:46:39,406 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:39,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:39,407 INFO L82 PathProgramCache]: Analyzing trace with hash 95128516, now seen corresponding path program 1 times [2020-10-27 19:46:39,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:39,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182110128] [2020-10-27 19:46:39,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:39,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:39,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:39,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:40,055 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 19:46:40,055 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:40,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 617 [2020-10-27 19:46:40,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:40,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:46:40,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:40,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 19:46:40,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:40,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:40,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:40,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:40,607 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:40,608 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:40,608 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:40,608 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:40,608 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:40,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:40,608 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:40,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:40,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:40,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:40,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182110128] [2020-10-27 19:46:40,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:40,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:46:40,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581171620] [2020-10-27 19:46:40,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:46:40,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:40,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:46:40,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:40,620 INFO L87 Difference]: Start difference. First operand 80 states and 94 transitions. Second operand 13 states. [2020-10-27 19:46:41,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:41,609 INFO L93 Difference]: Finished difference Result 129 states and 156 transitions. [2020-10-27 19:46:41,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:46:41,609 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 30 [2020-10-27 19:46:41,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:41,611 INFO L225 Difference]: With dead ends: 129 [2020-10-27 19:46:41,611 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 19:46:41,611 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:46:41,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 19:46:41,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 95. [2020-10-27 19:46:41,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 19:46:41,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 113 transitions. [2020-10-27 19:46:41,622 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 113 transitions. Word has length 30 [2020-10-27 19:46:41,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:41,622 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 113 transitions. [2020-10-27 19:46:41,622 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:46:41,622 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 113 transitions. [2020-10-27 19:46:41,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-27 19:46:41,623 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:41,623 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:41,623 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 19:46:41,623 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:41,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:41,624 INFO L82 PathProgramCache]: Analyzing trace with hash -1054790204, now seen corresponding path program 3 times [2020-10-27 19:46:41,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:41,630 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2034268376] [2020-10-27 19:46:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:41,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:41,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:42,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:42,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-27 19:46:42,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:42,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 416 [2020-10-27 19:46:42,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:42,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:46:42,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:42,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:42,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:42,513 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:42,513 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:42,513 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:42,514 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:42,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:42,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:42,514 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:42,524 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2034268376] [2020-10-27 19:46:42,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:42,525 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:42,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131022049] [2020-10-27 19:46:42,525 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:42,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:42,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:42,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:42,526 INFO L87 Difference]: Start difference. First operand 95 states and 113 transitions. Second operand 10 states. [2020-10-27 19:46:42,882 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 70 [2020-10-27 19:46:43,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:43,221 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2020-10-27 19:46:43,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 19:46:43,221 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 31 [2020-10-27 19:46:43,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:43,223 INFO L225 Difference]: With dead ends: 112 [2020-10-27 19:46:43,223 INFO L226 Difference]: Without dead ends: 82 [2020-10-27 19:46:43,224 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:46:43,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-27 19:46:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2020-10-27 19:46:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-27 19:46:43,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 99 transitions. [2020-10-27 19:46:43,231 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 99 transitions. Word has length 31 [2020-10-27 19:46:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:43,232 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 99 transitions. [2020-10-27 19:46:43,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:43,232 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 99 transitions. [2020-10-27 19:46:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:43,233 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:43,233 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:43,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 19:46:43,233 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash -947612464, now seen corresponding path program 1 times [2020-10-27 19:46:43,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:43,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1108720412] [2020-10-27 19:46:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:43,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:43,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:43,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:44,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:44,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:44,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:44,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1444 [2020-10-27 19:46:44,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:44,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:46:44,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:45,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:45,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:45,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:45,186 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:45,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:45,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:45,187 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:45,187 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:45,187 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:45,187 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:45,202 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1108720412] [2020-10-27 19:46:45,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:45,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:46:45,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218617751] [2020-10-27 19:46:45,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:46:45,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:45,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:46:45,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:45,203 INFO L87 Difference]: Start difference. First operand 82 states and 99 transitions. Second operand 11 states. [2020-10-27 19:46:45,792 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-27 19:46:46,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:46,467 INFO L93 Difference]: Finished difference Result 137 states and 169 transitions. [2020-10-27 19:46:46,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 19:46:46,468 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 33 [2020-10-27 19:46:46,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:46,469 INFO L225 Difference]: With dead ends: 137 [2020-10-27 19:46:46,470 INFO L226 Difference]: Without dead ends: 133 [2020-10-27 19:46:46,471 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:46:46,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-27 19:46:46,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 89. [2020-10-27 19:46:46,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-27 19:46:46,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 108 transitions. [2020-10-27 19:46:46,486 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 108 transitions. Word has length 33 [2020-10-27 19:46:46,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:46,486 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 108 transitions. [2020-10-27 19:46:46,486 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:46:46,486 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 108 transitions. [2020-10-27 19:46:46,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 19:46:46,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:46,488 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:46,488 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 19:46:46,488 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:46,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:46,489 INFO L82 PathProgramCache]: Analyzing trace with hash -2134874736, now seen corresponding path program 1 times [2020-10-27 19:46:46,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:46,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1139011950] [2020-10-27 19:46:46,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:46,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:46,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:46,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:47,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:47,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 19:46:47,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1466 [2020-10-27 19:46:47,985 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:46:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:47,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:47,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:48,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:48,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:48,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:48,167 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:48,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:48,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:48,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:46:48,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:48,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:48,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:48,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:48,168 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:48,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:48,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1139011950] [2020-10-27 19:46:48,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:48,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:46:48,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51363410] [2020-10-27 19:46:48,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:46:48,181 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:48,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:46:48,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:48,182 INFO L87 Difference]: Start difference. First operand 89 states and 108 transitions. Second operand 10 states. [2020-10-27 19:46:48,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:48,874 INFO L93 Difference]: Finished difference Result 150 states and 185 transitions. [2020-10-27 19:46:48,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:46:48,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 33 [2020-10-27 19:46:48,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:48,876 INFO L225 Difference]: With dead ends: 150 [2020-10-27 19:46:48,876 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 19:46:48,877 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:46:48,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 19:46:48,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 112. [2020-10-27 19:46:48,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-27 19:46:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2020-10-27 19:46:48,887 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 33 [2020-10-27 19:46:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:48,887 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2020-10-27 19:46:48,887 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:46:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2020-10-27 19:46:48,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-27 19:46:48,888 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:48,888 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:48,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 19:46:48,889 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:48,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:48,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1897728791, now seen corresponding path program 1 times [2020-10-27 19:46:48,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:48,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514657503] [2020-10-27 19:46:48,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:48,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:48,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:48,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:49,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,033 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:50,033 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-27 19:46:50,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:46:50,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1124 [2020-10-27 19:46:50,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:50,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:50,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:50,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-27 19:46:50,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:50,220 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:50,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,226 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:50,226 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:50,226 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:50,226 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:50,226 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:50,226 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:50,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:50,227 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:50,232 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:50,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514657503] [2020-10-27 19:46:50,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:50,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:50,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666234354] [2020-10-27 19:46:50,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:50,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:50,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:50,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:50,234 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand 8 states. [2020-10-27 19:46:50,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:50,664 INFO L93 Difference]: Finished difference Result 171 states and 213 transitions. [2020-10-27 19:46:50,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:46:50,664 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 34 [2020-10-27 19:46:50,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:50,665 INFO L225 Difference]: With dead ends: 171 [2020-10-27 19:46:50,665 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 19:46:50,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:46:50,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 19:46:50,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 109. [2020-10-27 19:46:50,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 19:46:50,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 133 transitions. [2020-10-27 19:46:50,683 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 133 transitions. Word has length 34 [2020-10-27 19:46:50,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:50,685 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 133 transitions. [2020-10-27 19:46:50,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:50,685 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 133 transitions. [2020-10-27 19:46:50,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:50,685 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:50,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:50,686 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 19:46:50,686 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:50,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:50,687 INFO L82 PathProgramCache]: Analyzing trace with hash -1109416156, now seen corresponding path program 1 times [2020-10-27 19:46:50,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:50,687 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [496495477] [2020-10-27 19:46:50,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:50,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:50,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:50,890 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:51,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:52,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,115 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,115 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:54,115 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:46:54,115 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3405 [2020-10-27 19:46:54,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 19:46:54,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 19:46:54,116 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-27 19:46:54,116 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:54,217 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:54,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:54,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,222 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:54,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:54,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:54,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:54,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:54,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:54,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:54,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:54,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:54,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:54,230 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [496495477] [2020-10-27 19:46:54,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 19:46:54,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 19:46:54,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553131660] [2020-10-27 19:46:54,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:54,234 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:54,234 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:54,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:54,234 INFO L87 Difference]: Start difference. First operand 109 states and 133 transitions. Second operand 8 states. [2020-10-27 19:46:54,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:54,764 INFO L93 Difference]: Finished difference Result 144 states and 176 transitions. [2020-10-27 19:46:54,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:54,764 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 19:46:54,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:54,766 INFO L225 Difference]: With dead ends: 144 [2020-10-27 19:46:54,766 INFO L226 Difference]: Without dead ends: 131 [2020-10-27 19:46:54,767 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:54,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-27 19:46:54,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 109. [2020-10-27 19:46:54,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 109 states. [2020-10-27 19:46:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 132 transitions. [2020-10-27 19:46:54,777 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 132 transitions. Word has length 35 [2020-10-27 19:46:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:54,777 INFO L481 AbstractCegarLoop]: Abstraction has 109 states and 132 transitions. [2020-10-27 19:46:54,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:54,778 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 132 transitions. [2020-10-27 19:46:54,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:54,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:54,778 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:54,778 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 19:46:54,779 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:54,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:54,779 INFO L82 PathProgramCache]: Analyzing trace with hash 640155104, now seen corresponding path program 1 times [2020-10-27 19:46:54,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:54,779 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066733214] [2020-10-27 19:46:54,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:54,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:54,807 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:54,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:55,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:55,182 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:55,182 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:55,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 385 [2020-10-27 19:46:55,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:46:55,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:46:55,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-27 19:46:55,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:55,436 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-27 19:46:55,625 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:55,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:55,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:55,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:55,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:55,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:55,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:55,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:55,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:55,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:55,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:55,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:55,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066733214] [2020-10-27 19:46:55,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:55,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 19:46:55,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970821907] [2020-10-27 19:46:55,645 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 19:46:55,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:55,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 19:46:55,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 19:46:55,645 INFO L87 Difference]: Start difference. First operand 109 states and 132 transitions. Second operand 8 states. [2020-10-27 19:46:56,131 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 55 [2020-10-27 19:46:56,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:46:56,370 INFO L93 Difference]: Finished difference Result 135 states and 164 transitions. [2020-10-27 19:46:56,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:46:56,372 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-10-27 19:46:56,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:46:56,373 INFO L225 Difference]: With dead ends: 135 [2020-10-27 19:46:56,374 INFO L226 Difference]: Without dead ends: 122 [2020-10-27 19:46:56,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:46:56,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-27 19:46:56,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 111. [2020-10-27 19:46:56,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-27 19:46:56,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 134 transitions. [2020-10-27 19:46:56,385 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 134 transitions. Word has length 35 [2020-10-27 19:46:56,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:46:56,385 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 134 transitions. [2020-10-27 19:46:56,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 19:46:56,385 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 134 transitions. [2020-10-27 19:46:56,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 19:46:56,386 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:46:56,386 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:46:56,386 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 19:46:56,386 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:46:56,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:46:56,387 INFO L82 PathProgramCache]: Analyzing trace with hash 1577052627, now seen corresponding path program 1 times [2020-10-27 19:46:56,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:46:56,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1007963921] [2020-10-27 19:46:56,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:46:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:56,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:56,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:57,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:57,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 19:46:57,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:46:57,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1204 [2020-10-27 19:46:57,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:46:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:46:57,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:46:57,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:58,077 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 38 [2020-10-27 19:46:58,534 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:46:58,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:46:58,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:46:58,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:46:58,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:46:58,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:46:58,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:46:58,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:46:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:46:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:46:58,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:46:58,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:46:58,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:46:58,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1007963921] [2020-10-27 19:46:58,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:46:58,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:46:58,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625712135] [2020-10-27 19:46:58,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:46:58,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:46:58,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:46:58,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:46:58,558 INFO L87 Difference]: Start difference. First operand 111 states and 134 transitions. Second operand 12 states. [2020-10-27 19:46:58,889 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 65 [2020-10-27 19:46:59,123 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 70 [2020-10-27 19:46:59,420 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 60 [2020-10-27 19:46:59,630 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-27 19:47:00,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:00,270 INFO L93 Difference]: Finished difference Result 154 states and 189 transitions. [2020-10-27 19:47:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:00,274 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 35 [2020-10-27 19:47:00,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:00,276 INFO L225 Difference]: With dead ends: 154 [2020-10-27 19:47:00,276 INFO L226 Difference]: Without dead ends: 141 [2020-10-27 19:47:00,276 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-27 19:47:00,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 116. [2020-10-27 19:47:00,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-27 19:47:00,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2020-10-27 19:47:00,292 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 35 [2020-10-27 19:47:00,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:00,292 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2020-10-27 19:47:00,292 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:47:00,292 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2020-10-27 19:47:00,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:47:00,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:00,293 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:00,293 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 19:47:00,293 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:00,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:00,295 INFO L82 PathProgramCache]: Analyzing trace with hash 1963302958, now seen corresponding path program 1 times [2020-10-27 19:47:00,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:00,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1198320344] [2020-10-27 19:47:00,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:00,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:00,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:00,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:01,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,000 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:47:03,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:47:03,001 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2674 [2020-10-27 19:47:03,001 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 19:47:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:03,001 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:47:03,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:03,159 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:03,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:03,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:03,165 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:03,165 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:03,165 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:03,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:03,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:03,166 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:03,174 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:03,174 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1198320344] [2020-10-27 19:47:03,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:03,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:03,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516966867] [2020-10-27 19:47:03,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:03,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:03,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:03,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:03,176 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand 10 states. [2020-10-27 19:47:03,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:03,727 INFO L93 Difference]: Finished difference Result 162 states and 199 transitions. [2020-10-27 19:47:03,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 19:47:03,728 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 36 [2020-10-27 19:47:03,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:03,729 INFO L225 Difference]: With dead ends: 162 [2020-10-27 19:47:03,730 INFO L226 Difference]: Without dead ends: 158 [2020-10-27 19:47:03,730 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:03,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2020-10-27 19:47:03,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 118. [2020-10-27 19:47:03,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 19:47:03,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2020-10-27 19:47:03,744 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 36 [2020-10-27 19:47:03,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:03,745 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2020-10-27 19:47:03,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:03,745 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2020-10-27 19:47:03,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-27 19:47:03,746 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:03,746 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:03,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 19:47:03,746 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:03,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:03,746 INFO L82 PathProgramCache]: Analyzing trace with hash -420358268, now seen corresponding path program 1 times [2020-10-27 19:47:03,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:03,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055439231] [2020-10-27 19:47:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:03,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:03,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:03,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,510 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:04,511 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-27 19:47:04,511 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:04,511 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 743 [2020-10-27 19:47:04,511 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 19:47:04,511 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:04,512 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-27 19:47:04,512 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:04,694 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:04,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:04,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:04,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:04,699 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:04,699 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:04,699 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:04,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:04,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:04,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:04,708 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:04,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055439231] [2020-10-27 19:47:04,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:04,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 19:47:04,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140032224] [2020-10-27 19:47:04,709 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 19:47:04,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:04,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 19:47:04,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2020-10-27 19:47:04,710 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 9 states. [2020-10-27 19:47:05,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:05,343 INFO L93 Difference]: Finished difference Result 177 states and 216 transitions. [2020-10-27 19:47:05,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 19:47:05,347 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 36 [2020-10-27 19:47:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:05,348 INFO L225 Difference]: With dead ends: 177 [2020-10-27 19:47:05,349 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 19:47:05,349 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 19:47:05,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 122. [2020-10-27 19:47:05,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-27 19:47:05,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 147 transitions. [2020-10-27 19:47:05,363 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 147 transitions. Word has length 36 [2020-10-27 19:47:05,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:05,364 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 147 transitions. [2020-10-27 19:47:05,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 19:47:05,364 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 147 transitions. [2020-10-27 19:47:05,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:05,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:05,365 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:05,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 19:47:05,365 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:05,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:05,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1755943373, now seen corresponding path program 2 times [2020-10-27 19:47:05,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:05,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [924355798] [2020-10-27 19:47:05,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:05,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:05,536 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:05,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:05,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:06,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2611 [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 19:47:08,002 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:08,294 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:08,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:08,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:08,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:08,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:08,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:08,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:08,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:08,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:08,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:47:08,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [924355798] [2020-10-27 19:47:08,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:08,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 19:47:08,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505368088] [2020-10-27 19:47:08,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 19:47:08,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:08,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 19:47:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 19:47:08,307 INFO L87 Difference]: Start difference. First operand 122 states and 147 transitions. Second operand 11 states. [2020-10-27 19:47:09,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:09,174 INFO L93 Difference]: Finished difference Result 238 states and 290 transitions. [2020-10-27 19:47:09,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:09,175 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 38 [2020-10-27 19:47:09,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:09,176 INFO L225 Difference]: With dead ends: 238 [2020-10-27 19:47:09,176 INFO L226 Difference]: Without dead ends: 186 [2020-10-27 19:47:09,177 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:47:09,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-27 19:47:09,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-27 19:47:09,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-27 19:47:09,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 174 transitions. [2020-10-27 19:47:09,190 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 174 transitions. Word has length 38 [2020-10-27 19:47:09,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:09,190 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 174 transitions. [2020-10-27 19:47:09,190 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 19:47:09,190 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 174 transitions. [2020-10-27 19:47:09,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:09,191 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:09,191 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:09,191 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 19:47:09,191 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:09,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:09,192 INFO L82 PathProgramCache]: Analyzing trace with hash -1224274728, now seen corresponding path program 1 times [2020-10-27 19:47:09,192 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:09,192 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708949112] [2020-10-27 19:47:09,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:09,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:09,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:09,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:10,864 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:10,865 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:10,865 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:10,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1645 [2020-10-27 19:47:10,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:10,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:10,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:10,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:47:10,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:11,279 WARN L193 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 47 [2020-10-27 19:47:11,500 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 19:47:11,725 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 54 [2020-10-27 19:47:11,968 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 58 [2020-10-27 19:47:12,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:12,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:12,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:12,563 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:12,563 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:12,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:12,564 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:12,564 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:12,564 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:12,564 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:12,581 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:12,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708949112] [2020-10-27 19:47:12,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:12,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:47:12,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171000261] [2020-10-27 19:47:12,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:47:12,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:12,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:47:12,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:12,582 INFO L87 Difference]: Start difference. First operand 144 states and 174 transitions. Second operand 15 states. [2020-10-27 19:47:13,434 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2020-10-27 19:47:13,697 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-27 19:47:13,944 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 59 [2020-10-27 19:47:14,461 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 77 [2020-10-27 19:47:15,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:15,029 INFO L93 Difference]: Finished difference Result 182 states and 218 transitions. [2020-10-27 19:47:15,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 19:47:15,036 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 38 [2020-10-27 19:47:15,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:15,038 INFO L225 Difference]: With dead ends: 182 [2020-10-27 19:47:15,038 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 19:47:15,038 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:47:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 19:47:15,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 160. [2020-10-27 19:47:15,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-27 19:47:15,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 192 transitions. [2020-10-27 19:47:15,055 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 192 transitions. Word has length 38 [2020-10-27 19:47:15,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:15,055 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 192 transitions. [2020-10-27 19:47:15,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:47:15,055 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 192 transitions. [2020-10-27 19:47:15,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:15,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:15,056 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:15,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 19:47:15,056 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:15,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:15,057 INFO L82 PathProgramCache]: Analyzing trace with hash 161928666, now seen corresponding path program 1 times [2020-10-27 19:47:15,057 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:15,057 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1772808615] [2020-10-27 19:47:15,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:15,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:15,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:15,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:16,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:16,378 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:16,378 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:16,378 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1292 [2020-10-27 19:47:16,378 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:16,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:47:16,379 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:16,955 WARN L193 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 58 [2020-10-27 19:47:17,286 WARN L193 SmtUtils]: Spent 306.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-27 19:47:17,582 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 68 [2020-10-27 19:47:17,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:17,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:17,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:17,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:17,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:17,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:17,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:17,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:17,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:17,838 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:17,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:47:17,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1772808615] [2020-10-27 19:47:17,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:17,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:17,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285004722] [2020-10-27 19:47:17,856 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:17,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:17,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:17,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:17,857 INFO L87 Difference]: Start difference. First operand 160 states and 192 transitions. Second operand 14 states. [2020-10-27 19:47:18,328 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 58 [2020-10-27 19:47:18,471 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-27 19:47:18,866 WARN L193 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 73 [2020-10-27 19:47:19,264 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 67 [2020-10-27 19:47:19,449 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 60 [2020-10-27 19:47:19,690 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 72 [2020-10-27 19:47:20,239 WARN L193 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 93 [2020-10-27 19:47:20,594 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 65 [2020-10-27 19:47:21,135 WARN L193 SmtUtils]: Spent 473.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 79 [2020-10-27 19:47:21,690 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 87 [2020-10-27 19:47:21,973 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 68 [2020-10-27 19:47:22,247 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 63 [2020-10-27 19:47:22,561 WARN L193 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-27 19:47:23,043 WARN L193 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 78 [2020-10-27 19:47:23,560 WARN L193 SmtUtils]: Spent 449.00 ms on a formula simplification. DAG size of input: 119 DAG size of output: 84 [2020-10-27 19:47:23,999 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 66 [2020-10-27 19:47:24,671 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 57 [2020-10-27 19:47:24,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:24,757 INFO L93 Difference]: Finished difference Result 282 states and 344 transitions. [2020-10-27 19:47:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:47:24,757 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 38 [2020-10-27 19:47:24,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:24,759 INFO L225 Difference]: With dead ends: 282 [2020-10-27 19:47:24,759 INFO L226 Difference]: Without dead ends: 269 [2020-10-27 19:47:24,760 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=265, Invalid=925, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:47:24,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-27 19:47:24,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 220. [2020-10-27 19:47:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-27 19:47:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 268 transitions. [2020-10-27 19:47:24,795 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 268 transitions. Word has length 38 [2020-10-27 19:47:24,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:24,796 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 268 transitions. [2020-10-27 19:47:24,796 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:24,796 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 268 transitions. [2020-10-27 19:47:24,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 19:47:24,797 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:24,797 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:24,797 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 19:47:24,797 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:24,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:24,799 INFO L82 PathProgramCache]: Analyzing trace with hash -915257247, now seen corresponding path program 1 times [2020-10-27 19:47:24,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:24,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683924630] [2020-10-27 19:47:24,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:24,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:24,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:25,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:25,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 19:47:25,804 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:25,804 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 977 [2020-10-27 19:47:25,804 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 19:47:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:25,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-27 19:47:25,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:26,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:26,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:26,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:26,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:26,014 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:26,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683924630] [2020-10-27 19:47:26,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:26,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 19:47:26,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [90975571] [2020-10-27 19:47:26,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 19:47:26,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:26,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 19:47:26,015 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 19:47:26,016 INFO L87 Difference]: Start difference. First operand 220 states and 268 transitions. Second operand 10 states. [2020-10-27 19:47:26,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:26,735 INFO L93 Difference]: Finished difference Result 272 states and 332 transitions. [2020-10-27 19:47:26,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 19:47:26,736 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-27 19:47:26,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:26,737 INFO L225 Difference]: With dead ends: 272 [2020-10-27 19:47:26,737 INFO L226 Difference]: Without dead ends: 220 [2020-10-27 19:47:26,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:26,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-27 19:47:26,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2020-10-27 19:47:26,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 220 states. [2020-10-27 19:47:26,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 267 transitions. [2020-10-27 19:47:26,761 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 267 transitions. Word has length 38 [2020-10-27 19:47:26,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:26,762 INFO L481 AbstractCegarLoop]: Abstraction has 220 states and 267 transitions. [2020-10-27 19:47:26,762 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 19:47:26,762 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 267 transitions. [2020-10-27 19:47:26,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:26,763 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:26,763 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:26,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 19:47:26,763 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:26,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:26,767 INFO L82 PathProgramCache]: Analyzing trace with hash -1660103494, now seen corresponding path program 1 times [2020-10-27 19:47:26,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:26,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [454852213] [2020-10-27 19:47:26,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:26,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:26,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:27,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1408 [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:47:28,200 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:28,530 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:28,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:28,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:28,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:28,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:28,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:28,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:28,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:28,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:28,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:28,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:28,565 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:28,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [454852213] [2020-10-27 19:47:28,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:28,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:28,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124258119] [2020-10-27 19:47:28,566 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:28,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:28,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:28,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:28,567 INFO L87 Difference]: Start difference. First operand 220 states and 267 transitions. Second operand 13 states. [2020-10-27 19:47:30,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:30,157 INFO L93 Difference]: Finished difference Result 337 states and 410 transitions. [2020-10-27 19:47:30,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:30,157 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 19:47:30,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:30,159 INFO L225 Difference]: With dead ends: 337 [2020-10-27 19:47:30,159 INFO L226 Difference]: Without dead ends: 285 [2020-10-27 19:47:30,160 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:30,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2020-10-27 19:47:30,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 229. [2020-10-27 19:47:30,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-27 19:47:30,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 277 transitions. [2020-10-27 19:47:30,183 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 277 transitions. Word has length 39 [2020-10-27 19:47:30,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:30,183 INFO L481 AbstractCegarLoop]: Abstraction has 229 states and 277 transitions. [2020-10-27 19:47:30,183 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:30,183 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 277 transitions. [2020-10-27 19:47:30,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 19:47:30,184 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:30,184 INFO L422 BasicCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:30,184 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 19:47:30,185 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:30,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:30,185 INFO L82 PathProgramCache]: Analyzing trace with hash 1613795448, now seen corresponding path program 1 times [2020-10-27 19:47:30,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:30,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418257509] [2020-10-27 19:47:30,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:30,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:30,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:30,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:30,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 19:47:30,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:47:30,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 663 [2020-10-27 19:47:30,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:30,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:30,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:30,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:30,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:31,167 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 71 [2020-10-27 19:47:31,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:31,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:31,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:31,318 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:31,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:31,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:31,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:31,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:31,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:31,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:31,334 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:31,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418257509] [2020-10-27 19:47:31,335 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:31,335 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:31,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357847565] [2020-10-27 19:47:31,335 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:31,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:31,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:31,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:31,336 INFO L87 Difference]: Start difference. First operand 229 states and 277 transitions. Second operand 13 states. [2020-10-27 19:47:31,671 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-27 19:47:31,890 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-27 19:47:32,235 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-27 19:47:32,437 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 66 [2020-10-27 19:47:32,616 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 71 [2020-10-27 19:47:33,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:33,110 INFO L93 Difference]: Finished difference Result 337 states and 417 transitions. [2020-10-27 19:47:33,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 19:47:33,110 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 39 [2020-10-27 19:47:33,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:33,112 INFO L225 Difference]: With dead ends: 337 [2020-10-27 19:47:33,112 INFO L226 Difference]: Without dead ends: 333 [2020-10-27 19:47:33,113 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:47:33,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2020-10-27 19:47:33,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 260. [2020-10-27 19:47:33,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260 states. [2020-10-27 19:47:33,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 320 transitions. [2020-10-27 19:47:33,141 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 320 transitions. Word has length 39 [2020-10-27 19:47:33,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:33,141 INFO L481 AbstractCegarLoop]: Abstraction has 260 states and 320 transitions. [2020-10-27 19:47:33,141 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:33,141 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 320 transitions. [2020-10-27 19:47:33,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-27 19:47:33,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:33,142 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:33,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 19:47:33,143 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:33,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:33,143 INFO L82 PathProgramCache]: Analyzing trace with hash 1669755901, now seen corresponding path program 2 times [2020-10-27 19:47:33,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:33,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291830631] [2020-10-27 19:47:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:33,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:33,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:33,693 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:33,693 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-27 19:47:33,693 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:33,693 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 520 [2020-10-27 19:47:33,694 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:33,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:33,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:33,694 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:47:33,694 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:34,366 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:34,369 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:34,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:34,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:34,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:34,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:34,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:34,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:34,396 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:34,396 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291830631] [2020-10-27 19:47:34,396 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:34,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:34,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952860845] [2020-10-27 19:47:34,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:34,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:34,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:34,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:34,397 INFO L87 Difference]: Start difference. First operand 260 states and 320 transitions. Second operand 14 states. [2020-10-27 19:47:34,958 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-27 19:47:35,098 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 49 [2020-10-27 19:47:35,311 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 69 [2020-10-27 19:47:35,534 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-27 19:47:35,714 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 56 [2020-10-27 19:47:35,901 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 59 [2020-10-27 19:47:36,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:36,589 INFO L93 Difference]: Finished difference Result 401 states and 497 transitions. [2020-10-27 19:47:36,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:36,589 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 41 [2020-10-27 19:47:36,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:36,591 INFO L225 Difference]: With dead ends: 401 [2020-10-27 19:47:36,591 INFO L226 Difference]: Without dead ends: 321 [2020-10-27 19:47:36,594 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=103, Invalid=317, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:47:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2020-10-27 19:47:36,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 262. [2020-10-27 19:47:36,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 262 states. [2020-10-27 19:47:36,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 323 transitions. [2020-10-27 19:47:36,622 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 323 transitions. Word has length 41 [2020-10-27 19:47:36,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:36,622 INFO L481 AbstractCegarLoop]: Abstraction has 262 states and 323 transitions. [2020-10-27 19:47:36,623 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:36,623 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 323 transitions. [2020-10-27 19:47:36,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:36,624 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:36,624 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:36,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 19:47:36,624 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:36,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -257052016, now seen corresponding path program 2 times [2020-10-27 19:47:36,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:36,625 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1901694390] [2020-10-27 19:47:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:36,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:36,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:36,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:37,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:38,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:39,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,023 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,581 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:40,722 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:41,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:41,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:41,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 29 [2020-10-27 19:47:41,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-27 19:47:41,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:47:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-27 19:47:41,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-27 19:47:41,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:41,903 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 57 [2020-10-27 19:47:42,041 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-27 19:47:42,178 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 19:47:42,321 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 50 [2020-10-27 19:47:42,457 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2020-10-27 19:47:42,762 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:42,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:42,765 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:42,767 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:42,768 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:42,768 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:42,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:42,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:42,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:42,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:42,780 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:42,781 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1901694390] [2020-10-27 19:47:42,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:42,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:47:42,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886828237] [2020-10-27 19:47:42,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:47:42,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:42,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:47:42,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:47:42,783 INFO L87 Difference]: Start difference. First operand 262 states and 323 transitions. Second operand 16 states. [2020-10-27 19:47:43,356 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 58 [2020-10-27 19:47:43,553 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 64 [2020-10-27 19:47:43,957 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-10-27 19:47:44,212 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 60 [2020-10-27 19:47:44,553 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 84 [2020-10-27 19:47:45,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:45,179 INFO L93 Difference]: Finished difference Result 340 states and 419 transitions. [2020-10-27 19:47:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 19:47:45,180 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 43 [2020-10-27 19:47:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:45,182 INFO L225 Difference]: With dead ends: 340 [2020-10-27 19:47:45,182 INFO L226 Difference]: Without dead ends: 319 [2020-10-27 19:47:45,183 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:47:45,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2020-10-27 19:47:45,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 289. [2020-10-27 19:47:45,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 289 states. [2020-10-27 19:47:45,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 354 transitions. [2020-10-27 19:47:45,215 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 354 transitions. Word has length 43 [2020-10-27 19:47:45,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:45,215 INFO L481 AbstractCegarLoop]: Abstraction has 289 states and 354 transitions. [2020-10-27 19:47:45,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:47:45,215 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 354 transitions. [2020-10-27 19:47:45,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:45,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:45,216 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:45,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 19:47:45,217 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:45,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:45,217 INFO L82 PathProgramCache]: Analyzing trace with hash 1492519244, now seen corresponding path program 1 times [2020-10-27 19:47:45,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:45,217 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [234568942] [2020-10-27 19:47:45,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:45,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:45,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:45,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:45,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:46,663 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:46,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:46,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:47:46,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1422 [2020-10-27 19:47:46,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:46,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:46,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:47:46,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:46,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:47,203 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-27 19:47:47,588 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 70 [2020-10-27 19:47:47,965 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 67 [2020-10-27 19:47:48,127 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 28 [2020-10-27 19:47:48,463 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 37 [2020-10-27 19:47:48,814 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 50 [2020-10-27 19:47:49,070 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:49,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:49,074 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:49,076 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:49,076 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:49,076 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:49,077 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:49,077 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:49,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:49,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:49,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:49,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [234568942] [2020-10-27 19:47:49,094 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:49,095 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:47:49,095 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904978930] [2020-10-27 19:47:49,095 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:47:49,095 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:49,095 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:47:49,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:47:49,096 INFO L87 Difference]: Start difference. First operand 289 states and 354 transitions. Second operand 14 states. [2020-10-27 19:47:49,842 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-27 19:47:50,278 WARN L193 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 52 [2020-10-27 19:47:50,745 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 61 [2020-10-27 19:47:51,623 WARN L193 SmtUtils]: Spent 820.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 107 [2020-10-27 19:47:52,133 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 19:47:52,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:52,583 INFO L93 Difference]: Finished difference Result 321 states and 394 transitions. [2020-10-27 19:47:52,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:47:52,584 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 43 [2020-10-27 19:47:52,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:52,585 INFO L225 Difference]: With dead ends: 321 [2020-10-27 19:47:52,585 INFO L226 Difference]: Without dead ends: 308 [2020-10-27 19:47:52,586 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:47:52,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2020-10-27 19:47:52,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 287. [2020-10-27 19:47:52,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 287 states. [2020-10-27 19:47:52,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 353 transitions. [2020-10-27 19:47:52,618 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 353 transitions. Word has length 43 [2020-10-27 19:47:52,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:52,619 INFO L481 AbstractCegarLoop]: Abstraction has 287 states and 353 transitions. [2020-10-27 19:47:52,619 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:47:52,619 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 353 transitions. [2020-10-27 19:47:52,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 19:47:52,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:52,620 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:52,620 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 19:47:52,620 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:52,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:52,621 INFO L82 PathProgramCache]: Analyzing trace with hash -1669080636, now seen corresponding path program 2 times [2020-10-27 19:47:52,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:52,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1205811209] [2020-10-27 19:47:52,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:52,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:52,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:53,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:53,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 19:47:53,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:53,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-27 19:47:53,191 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:53,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:47:53,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:53,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:47:53,192 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:53,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:53,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:53,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:53,489 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:53,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:53,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:53,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:47:53,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:53,489 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:53,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:53,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:53,505 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 19 proven. 14 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 19:47:53,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1205811209] [2020-10-27 19:47:53,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:53,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:53,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655265486] [2020-10-27 19:47:53,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:53,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:53,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:53,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:53,508 INFO L87 Difference]: Start difference. First operand 287 states and 353 transitions. Second operand 13 states. [2020-10-27 19:47:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:54,621 INFO L93 Difference]: Finished difference Result 613 states and 763 transitions. [2020-10-27 19:47:54,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:54,626 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 43 [2020-10-27 19:47:54,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:54,629 INFO L225 Difference]: With dead ends: 613 [2020-10-27 19:47:54,629 INFO L226 Difference]: Without dead ends: 428 [2020-10-27 19:47:54,630 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=304, Unknown=0, NotChecked=0, Total=420 [2020-10-27 19:47:54,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 428 states. [2020-10-27 19:47:54,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 428 to 369. [2020-10-27 19:47:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-27 19:47:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 453 transitions. [2020-10-27 19:47:54,669 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 453 transitions. Word has length 43 [2020-10-27 19:47:54,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:54,669 INFO L481 AbstractCegarLoop]: Abstraction has 369 states and 453 transitions. [2020-10-27 19:47:54,669 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:54,669 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 453 transitions. [2020-10-27 19:47:54,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:47:54,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:54,670 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:54,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 19:47:54,671 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:54,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:54,671 INFO L82 PathProgramCache]: Analyzing trace with hash 562822771, now seen corresponding path program 1 times [2020-10-27 19:47:54,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:54,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2132080317] [2020-10-27 19:47:54,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:54,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:54,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,265 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:55,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:47:55,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:55,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 562 [2020-10-27 19:47:55,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:47:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:55,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:47:55,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:55,891 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:55,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:55,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:55,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:55,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:55,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:55,895 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:55,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:55,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:55,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:55,896 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:55,910 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:47:55,910 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2132080317] [2020-10-27 19:47:55,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:55,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:47:55,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629804584] [2020-10-27 19:47:55,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:47:55,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:55,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:47:55,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:47:55,912 INFO L87 Difference]: Start difference. First operand 369 states and 453 transitions. Second operand 13 states. [2020-10-27 19:47:56,983 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-27 19:47:57,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:47:57,694 INFO L93 Difference]: Finished difference Result 616 states and 769 transitions. [2020-10-27 19:47:57,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:47:57,694 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 44 [2020-10-27 19:47:57,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:47:57,697 INFO L225 Difference]: With dead ends: 616 [2020-10-27 19:47:57,697 INFO L226 Difference]: Without dead ends: 511 [2020-10-27 19:47:57,698 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:47:57,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-10-27 19:47:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 415. [2020-10-27 19:47:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 415 states. [2020-10-27 19:47:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 510 transitions. [2020-10-27 19:47:57,746 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 510 transitions. Word has length 44 [2020-10-27 19:47:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:47:57,746 INFO L481 AbstractCegarLoop]: Abstraction has 415 states and 510 transitions. [2020-10-27 19:47:57,746 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:47:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 510 transitions. [2020-10-27 19:47:57,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 19:47:57,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:47:57,747 INFO L422 BasicCegarLoop]: trace histogram [6, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:47:57,748 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 19:47:57,748 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:47:57,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:47:57,748 INFO L82 PathProgramCache]: Analyzing trace with hash -1431321935, now seen corresponding path program 1 times [2020-10-27 19:47:57,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:47:57,748 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [596768205] [2020-10-27 19:47:57,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:47:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:57,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:58,634 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:58,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 19:47:58,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:58,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 816 [2020-10-27 19:47:58,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:47:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:47:58,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:47:58,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:59,028 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-27 19:47:59,357 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:47:59,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:47:59,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:47:59,362 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:47:59,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:47:59,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:47:59,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:47:59,363 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:47:59,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:47:59,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:47:59,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:47:59,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:47:59,382 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 11 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:47:59,382 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [596768205] [2020-10-27 19:47:59,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:47:59,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:47:59,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435102240] [2020-10-27 19:47:59,382 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:47:59,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:47:59,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:47:59,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:47:59,383 INFO L87 Difference]: Start difference. First operand 415 states and 510 transitions. Second operand 15 states. [2020-10-27 19:47:59,901 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-10-27 19:48:00,243 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 63 [2020-10-27 19:48:00,501 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-27 19:48:00,720 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 68 [2020-10-27 19:48:00,909 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 59 [2020-10-27 19:48:01,104 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 62 [2020-10-27 19:48:02,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:02,065 INFO L93 Difference]: Finished difference Result 592 states and 734 transitions. [2020-10-27 19:48:02,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:48:02,066 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 44 [2020-10-27 19:48:02,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:02,067 INFO L225 Difference]: With dead ends: 592 [2020-10-27 19:48:02,067 INFO L226 Difference]: Without dead ends: 468 [2020-10-27 19:48:02,068 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:02,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2020-10-27 19:48:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 412. [2020-10-27 19:48:02,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 412 states. [2020-10-27 19:48:02,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 504 transitions. [2020-10-27 19:48:02,107 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 504 transitions. Word has length 44 [2020-10-27 19:48:02,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:02,108 INFO L481 AbstractCegarLoop]: Abstraction has 412 states and 504 transitions. [2020-10-27 19:48:02,108 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:02,108 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 504 transitions. [2020-10-27 19:48:02,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:48:02,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:02,109 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:02,109 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 19:48:02,109 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:02,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:02,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1829820704, now seen corresponding path program 1 times [2020-10-27 19:48:02,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:02,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302764512] [2020-10-27 19:48:02,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:02,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:02,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:02,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:02,662 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:04,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:04,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:48:04,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:04,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1978 [2020-10-27 19:48:04,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:04,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:48:04,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:04,584 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 46 [2020-10-27 19:48:05,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:05,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:05,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:05,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:05,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:05,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:05,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:05,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:05,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:05,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:05,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:05,055 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 19:48:05,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302764512] [2020-10-27 19:48:05,055 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:05,055 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:05,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635675588] [2020-10-27 19:48:05,056 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:05,056 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:05,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:05,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:05,056 INFO L87 Difference]: Start difference. First operand 412 states and 504 transitions. Second operand 14 states. [2020-10-27 19:48:05,437 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 59 [2020-10-27 19:48:05,603 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-27 19:48:05,912 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-27 19:48:06,146 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-27 19:48:07,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:07,177 INFO L93 Difference]: Finished difference Result 450 states and 544 transitions. [2020-10-27 19:48:07,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 19:48:07,178 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 19:48:07,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:07,180 INFO L225 Difference]: With dead ends: 450 [2020-10-27 19:48:07,180 INFO L226 Difference]: Without dead ends: 437 [2020-10-27 19:48:07,180 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2020-10-27 19:48:07,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2020-10-27 19:48:07,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 423. [2020-10-27 19:48:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 423 states. [2020-10-27 19:48:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 423 states to 423 states and 515 transitions. [2020-10-27 19:48:07,228 INFO L78 Accepts]: Start accepts. Automaton has 423 states and 515 transitions. Word has length 45 [2020-10-27 19:48:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:07,229 INFO L481 AbstractCegarLoop]: Abstraction has 423 states and 515 transitions. [2020-10-27 19:48:07,229 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 423 states and 515 transitions. [2020-10-27 19:48:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:48:07,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:07,230 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:07,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 19:48:07,231 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:07,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1865613075, now seen corresponding path program 2 times [2020-10-27 19:48:07,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:07,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125828124] [2020-10-27 19:48:07,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:07,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:07,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:07,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:09,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:09,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:48:09,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:48:09,088 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1815 [2020-10-27 19:48:09,088 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:09,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:48:09,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:09,089 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 19:48:09,089 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:10,162 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:10,165 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:10,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:10,167 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:10,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:10,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:10,167 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:10,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:10,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:10,191 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:10,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125828124] [2020-10-27 19:48:10,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:10,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:48:10,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964268524] [2020-10-27 19:48:10,192 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:48:10,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:10,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:48:10,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:10,193 INFO L87 Difference]: Start difference. First operand 423 states and 515 transitions. Second operand 18 states. [2020-10-27 19:48:11,061 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 68 [2020-10-27 19:48:11,348 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 62 [2020-10-27 19:48:11,589 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 69 [2020-10-27 19:48:12,083 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 86 [2020-10-27 19:48:12,345 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 77 [2020-10-27 19:48:12,715 WARN L193 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 92 [2020-10-27 19:48:12,898 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 59 [2020-10-27 19:48:13,110 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 64 [2020-10-27 19:48:13,595 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 85 [2020-10-27 19:48:14,609 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 92 [2020-10-27 19:48:14,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:14,927 INFO L93 Difference]: Finished difference Result 557 states and 683 transitions. [2020-10-27 19:48:14,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 19:48:14,928 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 45 [2020-10-27 19:48:14,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:14,931 INFO L225 Difference]: With dead ends: 557 [2020-10-27 19:48:14,931 INFO L226 Difference]: Without dead ends: 553 [2020-10-27 19:48:14,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=153, Invalid=777, Unknown=0, NotChecked=0, Total=930 [2020-10-27 19:48:14,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2020-10-27 19:48:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 472. [2020-10-27 19:48:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 472 states. [2020-10-27 19:48:14,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 576 transitions. [2020-10-27 19:48:14,985 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 576 transitions. Word has length 45 [2020-10-27 19:48:14,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:14,985 INFO L481 AbstractCegarLoop]: Abstraction has 472 states and 576 transitions. [2020-10-27 19:48:14,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:48:14,985 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 576 transitions. [2020-10-27 19:48:14,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 19:48:14,987 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:14,987 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:14,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 19:48:14,987 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:14,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:14,987 INFO L82 PathProgramCache]: Analyzing trace with hash 453584455, now seen corresponding path program 3 times [2020-10-27 19:48:14,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:14,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2083300005] [2020-10-27 19:48:14,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:15,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:15,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 537 [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:48:15,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:15,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:15,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:15,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:15,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:15,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:15,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:15,873 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:15,873 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:15,873 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:15,896 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-27 19:48:15,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2083300005] [2020-10-27 19:48:15,897 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:15,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:48:15,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461937975] [2020-10-27 19:48:15,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:48:15,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:15,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:48:15,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:48:15,898 INFO L87 Difference]: Start difference. First operand 472 states and 576 transitions. Second operand 14 states. [2020-10-27 19:48:17,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:17,331 INFO L93 Difference]: Finished difference Result 661 states and 819 transitions. [2020-10-27 19:48:17,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 19:48:17,332 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 45 [2020-10-27 19:48:17,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:17,334 INFO L225 Difference]: With dead ends: 661 [2020-10-27 19:48:17,334 INFO L226 Difference]: Without dead ends: 556 [2020-10-27 19:48:17,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=377, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2020-10-27 19:48:17,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 506. [2020-10-27 19:48:17,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 506 states. [2020-10-27 19:48:17,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 619 transitions. [2020-10-27 19:48:17,390 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 619 transitions. Word has length 45 [2020-10-27 19:48:17,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:17,390 INFO L481 AbstractCegarLoop]: Abstraction has 506 states and 619 transitions. [2020-10-27 19:48:17,390 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:48:17,390 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 619 transitions. [2020-10-27 19:48:17,392 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:48:17,392 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:17,392 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:17,392 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 19:48:17,392 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:17,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:17,393 INFO L82 PathProgramCache]: Analyzing trace with hash 1940931152, now seen corresponding path program 2 times [2020-10-27 19:48:17,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:17,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479543907] [2020-10-27 19:48:17,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:17,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:17,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:18,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:18,161 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:48:18,161 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:18,161 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 730 [2020-10-27 19:48:18,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:48:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 19:48:18,161 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:18,450 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 44 [2020-10-27 19:48:18,739 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:18,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:18,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:18,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:18,743 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:18,743 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:18,743 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:18,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:18,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:18,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:18,760 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 21 proven. 29 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:48:18,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479543907] [2020-10-27 19:48:18,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:18,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 19:48:18,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744355293] [2020-10-27 19:48:18,761 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 19:48:18,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:18,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 19:48:18,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-27 19:48:18,761 INFO L87 Difference]: Start difference. First operand 506 states and 619 transitions. Second operand 15 states. [2020-10-27 19:48:20,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:20,683 INFO L93 Difference]: Finished difference Result 921 states and 1149 transitions. [2020-10-27 19:48:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:48:20,686 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 46 [2020-10-27 19:48:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:20,689 INFO L225 Difference]: With dead ends: 921 [2020-10-27 19:48:20,689 INFO L226 Difference]: Without dead ends: 784 [2020-10-27 19:48:20,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=124, Invalid=382, Unknown=0, NotChecked=0, Total=506 [2020-10-27 19:48:20,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2020-10-27 19:48:20,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 645. [2020-10-27 19:48:20,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 645 states. [2020-10-27 19:48:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 645 states to 645 states and 795 transitions. [2020-10-27 19:48:20,758 INFO L78 Accepts]: Start accepts. Automaton has 645 states and 795 transitions. Word has length 46 [2020-10-27 19:48:20,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:20,758 INFO L481 AbstractCegarLoop]: Abstraction has 645 states and 795 transitions. [2020-10-27 19:48:20,758 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 19:48:20,758 INFO L276 IsEmpty]: Start isEmpty. Operand 645 states and 795 transitions. [2020-10-27 19:48:20,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 19:48:20,760 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:20,760 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:20,760 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 19:48:20,760 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash -53213554, now seen corresponding path program 1 times [2020-10-27 19:48:20,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:20,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648131624] [2020-10-27 19:48:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:20,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:20,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 879 [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 19:48:21,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:21,979 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 51 [2020-10-27 19:48:22,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:22,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:22,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:22,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:22,422 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:22,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648131624] [2020-10-27 19:48:22,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:22,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:22,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475782226] [2020-10-27 19:48:22,423 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:22,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:22,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:22,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=201, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:22,424 INFO L87 Difference]: Start difference. First operand 645 states and 795 transitions. Second operand 16 states. [2020-10-27 19:48:23,116 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 68 [2020-10-27 19:48:23,253 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 61 [2020-10-27 19:48:23,643 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 71 [2020-10-27 19:48:23,838 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 74 [2020-10-27 19:48:24,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:24,947 INFO L93 Difference]: Finished difference Result 1068 states and 1330 transitions. [2020-10-27 19:48:24,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:48:24,948 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 46 [2020-10-27 19:48:24,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:24,951 INFO L225 Difference]: With dead ends: 1068 [2020-10-27 19:48:24,951 INFO L226 Difference]: Without dead ends: 963 [2020-10-27 19:48:24,952 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-10-27 19:48:24,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 963 states. [2020-10-27 19:48:25,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 963 to 753. [2020-10-27 19:48:25,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 753 states. [2020-10-27 19:48:25,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 937 transitions. [2020-10-27 19:48:25,035 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 937 transitions. Word has length 46 [2020-10-27 19:48:25,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:25,036 INFO L481 AbstractCegarLoop]: Abstraction has 753 states and 937 transitions. [2020-10-27 19:48:25,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:25,036 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 937 transitions. [2020-10-27 19:48:25,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:48:25,037 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:25,037 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:25,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 19:48:25,038 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:25,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:25,038 INFO L82 PathProgramCache]: Analyzing trace with hash -183985616, now seen corresponding path program 1 times [2020-10-27 19:48:25,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:25,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [443185283] [2020-10-27 19:48:25,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:25,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:25,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:25,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:26,579 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:26,580 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:48:26,580 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:48:26,580 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1505 [2020-10-27 19:48:26,580 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:26,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:26,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:26,580 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:48:26,580 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:27,145 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2020-10-27 19:48:27,290 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 38 [2020-10-27 19:48:27,710 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 55 [2020-10-27 19:48:27,969 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 60 [2020-10-27 19:48:28,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:28,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:28,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:28,337 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:28,337 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:28,337 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:28,338 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:28,338 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:28,338 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:28,364 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:28,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [443185283] [2020-10-27 19:48:28,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:28,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:28,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776611334] [2020-10-27 19:48:28,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:28,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:28,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:28,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:28,365 INFO L87 Difference]: Start difference. First operand 753 states and 937 transitions. Second operand 16 states. [2020-10-27 19:48:28,965 WARN L193 SmtUtils]: Spent 340.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 80 [2020-10-27 19:48:29,124 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 41 [2020-10-27 19:48:29,276 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 45 [2020-10-27 19:48:29,485 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 50 [2020-10-27 19:48:29,701 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 46 [2020-10-27 19:48:30,006 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 61 [2020-10-27 19:48:30,296 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-27 19:48:31,539 WARN L193 SmtUtils]: Spent 361.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 91 [2020-10-27 19:48:32,214 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 87 [2020-10-27 19:48:32,862 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 81 [2020-10-27 19:48:33,489 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 105 [2020-10-27 19:48:33,705 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 55 [2020-10-27 19:48:33,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:33,867 INFO L93 Difference]: Finished difference Result 906 states and 1125 transitions. [2020-10-27 19:48:33,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-27 19:48:33,868 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-27 19:48:33,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:33,872 INFO L225 Difference]: With dead ends: 906 [2020-10-27 19:48:33,872 INFO L226 Difference]: Without dead ends: 902 [2020-10-27 19:48:33,872 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=266, Invalid=924, Unknown=0, NotChecked=0, Total=1190 [2020-10-27 19:48:33,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 902 states. [2020-10-27 19:48:33,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 902 to 783. [2020-10-27 19:48:33,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 783 states. [2020-10-27 19:48:33,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 974 transitions. [2020-10-27 19:48:33,959 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 974 transitions. Word has length 47 [2020-10-27 19:48:33,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:33,959 INFO L481 AbstractCegarLoop]: Abstraction has 783 states and 974 transitions. [2020-10-27 19:48:33,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:33,959 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 974 transitions. [2020-10-27 19:48:33,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:48:33,961 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:33,961 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:33,961 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 19:48:33,961 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:33,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:33,962 INFO L82 PathProgramCache]: Analyzing trace with hash -1371247888, now seen corresponding path program 1 times [2020-10-27 19:48:33,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:33,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [607631546] [2020-10-27 19:48:33,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:34,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:34,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:34,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:34,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:48:34,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:34,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 786 [2020-10-27 19:48:34,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:34,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 19:48:34,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:34,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:48:34,797 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:35,367 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 45 [2020-10-27 19:48:35,655 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-27 19:48:35,836 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 49 [2020-10-27 19:48:36,237 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:36,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:36,241 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:36,241 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:36,241 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:36,241 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:36,242 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:36,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:36,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:36,242 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:36,242 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:36,267 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:36,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [607631546] [2020-10-27 19:48:36,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:36,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-27 19:48:36,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887052106] [2020-10-27 19:48:36,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-27 19:48:36,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:36,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-27 19:48:36,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2020-10-27 19:48:36,269 INFO L87 Difference]: Start difference. First operand 783 states and 974 transitions. Second operand 16 states. [2020-10-27 19:48:36,773 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 71 [2020-10-27 19:48:36,964 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-27 19:48:37,309 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 67 [2020-10-27 19:48:37,616 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-27 19:48:37,796 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-27 19:48:38,156 WARN L193 SmtUtils]: Spent 274.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 81 [2020-10-27 19:48:38,501 WARN L193 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 81 [2020-10-27 19:48:38,949 WARN L193 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 86 [2020-10-27 19:48:39,194 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 70 [2020-10-27 19:48:39,445 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 73 [2020-10-27 19:48:39,833 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 59 [2020-10-27 19:48:40,033 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 69 [2020-10-27 19:48:40,410 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 82 [2020-10-27 19:48:40,896 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-27 19:48:41,241 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 69 [2020-10-27 19:48:41,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:41,732 INFO L93 Difference]: Finished difference Result 1136 states and 1411 transitions. [2020-10-27 19:48:41,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-27 19:48:41,732 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 47 [2020-10-27 19:48:41,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:41,738 INFO L225 Difference]: With dead ends: 1136 [2020-10-27 19:48:41,738 INFO L226 Difference]: Without dead ends: 1132 [2020-10-27 19:48:41,738 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=266, Invalid=1066, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:48:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1132 states. [2020-10-27 19:48:41,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1132 to 878. [2020-10-27 19:48:41,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 878 states. [2020-10-27 19:48:41,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 1094 transitions. [2020-10-27 19:48:41,840 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 1094 transitions. Word has length 47 [2020-10-27 19:48:41,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:41,840 INFO L481 AbstractCegarLoop]: Abstraction has 878 states and 1094 transitions. [2020-10-27 19:48:41,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-27 19:48:41,840 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 1094 transitions. [2020-10-27 19:48:41,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 19:48:41,842 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:41,842 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:41,842 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 19:48:41,842 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:41,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:41,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1505261394, now seen corresponding path program 1 times [2020-10-27 19:48:41,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:41,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438054599] [2020-10-27 19:48:41,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:41,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:41,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:41,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:42,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2450 [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 19:48:44,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:44,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:44,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:44,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:44,649 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:44,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:44,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:44,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:44,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:44,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:44,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:44,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:44,650 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:44,662 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:44,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438054599] [2020-10-27 19:48:44,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:44,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:48:44,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316805091] [2020-10-27 19:48:44,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:48:44,662 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:44,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:48:44,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:48:44,663 INFO L87 Difference]: Start difference. First operand 878 states and 1094 transitions. Second operand 13 states. [2020-10-27 19:48:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:45,954 INFO L93 Difference]: Finished difference Result 1249 states and 1560 transitions. [2020-10-27 19:48:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:48:45,955 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 47 [2020-10-27 19:48:45,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:45,958 INFO L225 Difference]: With dead ends: 1249 [2020-10-27 19:48:45,958 INFO L226 Difference]: Without dead ends: 846 [2020-10-27 19:48:45,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:48:45,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 846 states. [2020-10-27 19:48:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 846 to 780. [2020-10-27 19:48:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2020-10-27 19:48:46,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 968 transitions. [2020-10-27 19:48:46,040 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 968 transitions. Word has length 47 [2020-10-27 19:48:46,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:46,040 INFO L481 AbstractCegarLoop]: Abstraction has 780 states and 968 transitions. [2020-10-27 19:48:46,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:48:46,040 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 968 transitions. [2020-10-27 19:48:46,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:48:46,042 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:46,042 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:46,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 19:48:46,042 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:46,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:46,043 INFO L82 PathProgramCache]: Analyzing trace with hash 299867017, now seen corresponding path program 1 times [2020-10-27 19:48:46,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:46,043 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129837379] [2020-10-27 19:48:46,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:46,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:46,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:46,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:47,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:50,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:50,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:48:50,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 19:48:50,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4431 [2020-10-27 19:48:50,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:50,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:48:50,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:50,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-27 19:48:50,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:50,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:50,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:50,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:50,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:50,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:50,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:50,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 19:48:50,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:50,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:50,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:50,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:50,972 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:50,987 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129837379] [2020-10-27 19:48:50,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:50,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:48:50,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128591121] [2020-10-27 19:48:50,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:48:50,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:50,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:48:50,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:48:50,989 INFO L87 Difference]: Start difference. First operand 780 states and 968 transitions. Second operand 12 states. [2020-10-27 19:48:51,771 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 55 [2020-10-27 19:48:51,989 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 60 [2020-10-27 19:48:52,127 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 49 [2020-10-27 19:48:52,321 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-27 19:48:52,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:48:52,545 INFO L93 Difference]: Finished difference Result 1046 states and 1291 transitions. [2020-10-27 19:48:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 19:48:52,546 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-27 19:48:52,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:48:52,553 INFO L225 Difference]: With dead ends: 1046 [2020-10-27 19:48:52,553 INFO L226 Difference]: Without dead ends: 975 [2020-10-27 19:48:52,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=116, Invalid=264, Unknown=0, NotChecked=0, Total=380 [2020-10-27 19:48:52,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2020-10-27 19:48:52,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 864. [2020-10-27 19:48:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 864 states. [2020-10-27 19:48:52,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1068 transitions. [2020-10-27 19:48:52,640 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1068 transitions. Word has length 48 [2020-10-27 19:48:52,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:48:52,641 INFO L481 AbstractCegarLoop]: Abstraction has 864 states and 1068 transitions. [2020-10-27 19:48:52,641 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:48:52,641 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1068 transitions. [2020-10-27 19:48:52,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:48:52,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:48:52,643 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:48:52,643 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 19:48:52,643 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:48:52,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:48:52,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1909695863, now seen corresponding path program 2 times [2020-10-27 19:48:52,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:48:52,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1597904455] [2020-10-27 19:48:52,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:48:52,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:52,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:52,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:53,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:53,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:53,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:54,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:55,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:55,719 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:48:55,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:48:55,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3049 [2020-10-27 19:48:55,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:48:55,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:48:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 19:48:55,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:56,201 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 53 [2020-10-27 19:48:56,329 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-27 19:48:56,531 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-10-27 19:48:56,818 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2020-10-27 19:48:57,341 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:48:57,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:48:57,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:48:57,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:48:57,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:48:57,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:48:57,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:48:57,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:48:57,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:48:57,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:48:57,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:48:57,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:48:57,366 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:48:57,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1597904455] [2020-10-27 19:48:57,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:48:57,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:48:57,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710803488] [2020-10-27 19:48:57,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:48:57,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:48:57,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:48:57,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:48:57,368 INFO L87 Difference]: Start difference. First operand 864 states and 1068 transitions. Second operand 18 states. [2020-10-27 19:48:57,778 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 65 [2020-10-27 19:48:57,938 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 61 [2020-10-27 19:49:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:00,796 INFO L93 Difference]: Finished difference Result 1393 states and 1751 transitions. [2020-10-27 19:49:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-27 19:49:00,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-27 19:49:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:00,800 INFO L225 Difference]: With dead ends: 1393 [2020-10-27 19:49:00,800 INFO L226 Difference]: Without dead ends: 1108 [2020-10-27 19:49:00,802 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 521 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=359, Invalid=1803, Unknown=0, NotChecked=0, Total=2162 [2020-10-27 19:49:00,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1108 states. [2020-10-27 19:49:00,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1108 to 981. [2020-10-27 19:49:00,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 981 states. [2020-10-27 19:49:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 981 states to 981 states and 1219 transitions. [2020-10-27 19:49:00,948 INFO L78 Accepts]: Start accepts. Automaton has 981 states and 1219 transitions. Word has length 48 [2020-10-27 19:49:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:00,949 INFO L481 AbstractCegarLoop]: Abstraction has 981 states and 1219 transitions. [2020-10-27 19:49:00,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:49:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 981 states and 1219 transitions. [2020-10-27 19:49:00,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:49:00,951 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:00,951 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:00,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 19:49:00,951 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:00,952 INFO L82 PathProgramCache]: Analyzing trace with hash 514743964, now seen corresponding path program 2 times [2020-10-27 19:49:00,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:00,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660584209] [2020-10-27 19:49:00,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:00,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:01,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:01,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:01,522 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2806 [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:49:03,789 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:04,123 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-27 19:49:04,254 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 46 [2020-10-27 19:49:04,415 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-27 19:49:04,561 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2020-10-27 19:49:04,684 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2020-10-27 19:49:04,824 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 33 [2020-10-27 19:49:05,212 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:05,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:05,218 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:05,219 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:05,219 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:05,219 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:05,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:05,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:05,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:05,247 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 19:49:05,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660584209] [2020-10-27 19:49:05,247 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:05,247 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:49:05,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842529788] [2020-10-27 19:49:05,248 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:49:05,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:05,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:49:05,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:49:05,248 INFO L87 Difference]: Start difference. First operand 981 states and 1219 transitions. Second operand 14 states. [2020-10-27 19:49:05,707 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 74 [2020-10-27 19:49:06,001 WARN L193 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 85 [2020-10-27 19:49:06,182 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 59 [2020-10-27 19:49:06,591 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 111 [2020-10-27 19:49:06,971 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 88 [2020-10-27 19:49:07,371 WARN L193 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 98 [2020-10-27 19:49:07,833 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 108 [2020-10-27 19:49:08,114 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 59 [2020-10-27 19:49:08,461 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 63 [2020-10-27 19:49:09,160 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 39 [2020-10-27 19:49:09,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:09,276 INFO L93 Difference]: Finished difference Result 1011 states and 1251 transitions. [2020-10-27 19:49:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 19:49:09,276 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 48 [2020-10-27 19:49:09,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:09,279 INFO L225 Difference]: With dead ends: 1011 [2020-10-27 19:49:09,280 INFO L226 Difference]: Without dead ends: 998 [2020-10-27 19:49:09,280 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:49:09,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 998 states. [2020-10-27 19:49:09,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 998 to 987. [2020-10-27 19:49:09,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 987 states. [2020-10-27 19:49:09,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 987 states to 987 states and 1225 transitions. [2020-10-27 19:49:09,375 INFO L78 Accepts]: Start accepts. Automaton has 987 states and 1225 transitions. Word has length 48 [2020-10-27 19:49:09,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:09,375 INFO L481 AbstractCegarLoop]: Abstraction has 987 states and 1225 transitions. [2020-10-27 19:49:09,375 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:49:09,375 INFO L276 IsEmpty]: Start isEmpty. Operand 987 states and 1225 transitions. [2020-10-27 19:49:09,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-27 19:49:09,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:09,377 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:09,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 19:49:09,377 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:09,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:09,378 INFO L82 PathProgramCache]: Analyzing trace with hash 539904267, now seen corresponding path program 1 times [2020-10-27 19:49:09,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:09,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [584724583] [2020-10-27 19:49:09,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:09,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:09,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:09,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:09,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:10,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:10,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:10,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:12,419 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:12,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-27 19:49:12,420 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 19:49:12,420 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3013 [2020-10-27 19:49:12,420 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-27 19:49:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:12,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 19:49:12,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:12,851 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 45 [2020-10-27 19:49:13,044 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 40 [2020-10-27 19:49:13,248 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 21 [2020-10-27 19:49:13,433 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2020-10-27 19:49:13,598 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2020-10-27 19:49:13,745 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2020-10-27 19:49:14,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:14,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:14,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:14,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:14,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:14,166 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:14,193 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:14,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [584724583] [2020-10-27 19:49:14,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:14,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-27 19:49:14,193 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589765443] [2020-10-27 19:49:14,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-27 19:49:14,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:14,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-27 19:49:14,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2020-10-27 19:49:14,195 INFO L87 Difference]: Start difference. First operand 987 states and 1225 transitions. Second operand 18 states. [2020-10-27 19:49:14,563 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 64 [2020-10-27 19:49:14,718 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 60 [2020-10-27 19:49:17,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:17,587 INFO L93 Difference]: Finished difference Result 1428 states and 1793 transitions. [2020-10-27 19:49:17,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-27 19:49:17,588 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 48 [2020-10-27 19:49:17,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:17,591 INFO L225 Difference]: With dead ends: 1428 [2020-10-27 19:49:17,591 INFO L226 Difference]: Without dead ends: 1066 [2020-10-27 19:49:17,593 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=348, Invalid=1722, Unknown=0, NotChecked=0, Total=2070 [2020-10-27 19:49:17,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2020-10-27 19:49:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 944. [2020-10-27 19:49:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 944 states. [2020-10-27 19:49:17,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 1171 transitions. [2020-10-27 19:49:17,702 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 1171 transitions. Word has length 48 [2020-10-27 19:49:17,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:17,702 INFO L481 AbstractCegarLoop]: Abstraction has 944 states and 1171 transitions. [2020-10-27 19:49:17,702 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-27 19:49:17,702 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 1171 transitions. [2020-10-27 19:49:17,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:49:17,703 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:17,704 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:17,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 19:49:17,704 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:17,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:17,704 INFO L82 PathProgramCache]: Analyzing trace with hash 7962059, now seen corresponding path program 1 times [2020-10-27 19:49:17,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:17,704 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832804973] [2020-10-27 19:49:17,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:17,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:17,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:17,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:18,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:20,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:20,287 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:49:20,287 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:49:20,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2559 [2020-10-27 19:49:20,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:20,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:49:20,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:20,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 19:49:20,288 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:20,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:20,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:20,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:20,671 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:20,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832804973] [2020-10-27 19:49:20,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:20,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 19:49:20,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46096248] [2020-10-27 19:49:20,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 19:49:20,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:20,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 19:49:20,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2020-10-27 19:49:20,672 INFO L87 Difference]: Start difference. First operand 944 states and 1171 transitions. Second operand 12 states. [2020-10-27 19:49:21,720 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 63 [2020-10-27 19:49:21,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:21,934 INFO L93 Difference]: Finished difference Result 1374 states and 1711 transitions. [2020-10-27 19:49:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:49:21,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 49 [2020-10-27 19:49:21,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:21,938 INFO L225 Difference]: With dead ends: 1374 [2020-10-27 19:49:21,938 INFO L226 Difference]: Without dead ends: 1303 [2020-10-27 19:49:21,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:49:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2020-10-27 19:49:22,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 1152. [2020-10-27 19:49:22,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1152 states. [2020-10-27 19:49:22,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1152 states to 1152 states and 1430 transitions. [2020-10-27 19:49:22,023 INFO L78 Accepts]: Start accepts. Automaton has 1152 states and 1430 transitions. Word has length 49 [2020-10-27 19:49:22,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:22,023 INFO L481 AbstractCegarLoop]: Abstraction has 1152 states and 1430 transitions. [2020-10-27 19:49:22,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 19:49:22,023 INFO L276 IsEmpty]: Start isEmpty. Operand 1152 states and 1430 transitions. [2020-10-27 19:49:22,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 19:49:22,024 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:22,024 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:22,024 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 19:49:22,024 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:22,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:22,025 INFO L82 PathProgramCache]: Analyzing trace with hash 983045939, now seen corresponding path program 2 times [2020-10-27 19:49:22,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:22,025 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [195685047] [2020-10-27 19:49:22,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:22,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:22,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:23,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:23,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 19:49:23,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:23,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1019 [2020-10-27 19:49:23,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 19:49:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:23,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 19:49:23,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:23,417 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 57 [2020-10-27 19:49:23,541 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 19:49:23,697 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 54 [2020-10-27 19:49:23,960 WARN L193 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 57 [2020-10-27 19:49:24,094 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 19:49:24,366 WARN L193 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 53 [2020-10-27 19:49:24,502 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 48 [2020-10-27 19:49:24,720 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 46 [2020-10-27 19:49:25,133 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:25,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:25,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:25,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:25,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:25,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:25,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:25,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:25,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:25,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:25,210 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:25,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [195685047] [2020-10-27 19:49:25,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:25,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-27 19:49:25,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890430453] [2020-10-27 19:49:25,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-27 19:49:25,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:25,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-27 19:49:25,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2020-10-27 19:49:25,212 INFO L87 Difference]: Start difference. First operand 1152 states and 1430 transitions. Second operand 17 states. [2020-10-27 19:49:25,753 WARN L193 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 84 [2020-10-27 19:49:26,066 WARN L193 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 85 [2020-10-27 19:49:26,288 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-27 19:49:26,522 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 67 [2020-10-27 19:49:26,743 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 66 [2020-10-27 19:49:26,973 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 59 [2020-10-27 19:49:27,223 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 59 [2020-10-27 19:49:27,588 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 85 [2020-10-27 19:49:28,014 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 88 [2020-10-27 19:49:28,421 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 82 [2020-10-27 19:49:28,690 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 85 [2020-10-27 19:49:29,199 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 61 [2020-10-27 19:49:29,432 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 71 [2020-10-27 19:49:29,812 WARN L193 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 88 [2020-10-27 19:49:30,201 WARN L193 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 79 [2020-10-27 19:49:30,876 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2020-10-27 19:49:30,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:30,997 INFO L93 Difference]: Finished difference Result 1207 states and 1496 transitions. [2020-10-27 19:49:30,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-27 19:49:30,997 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 49 [2020-10-27 19:49:30,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:31,002 INFO L225 Difference]: With dead ends: 1207 [2020-10-27 19:49:31,002 INFO L226 Difference]: Without dead ends: 1203 [2020-10-27 19:49:31,003 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=246, Invalid=1086, Unknown=0, NotChecked=0, Total=1332 [2020-10-27 19:49:31,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2020-10-27 19:49:31,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 1162. [2020-10-27 19:49:31,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1162 states. [2020-10-27 19:49:31,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1442 transitions. [2020-10-27 19:49:31,088 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1442 transitions. Word has length 49 [2020-10-27 19:49:31,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:31,088 INFO L481 AbstractCegarLoop]: Abstraction has 1162 states and 1442 transitions. [2020-10-27 19:49:31,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-27 19:49:31,088 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1442 transitions. [2020-10-27 19:49:31,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:49:31,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:31,090 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 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, 1, 1] [2020-10-27 19:49:31,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 19:49:31,090 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:31,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1318281848, now seen corresponding path program 2 times [2020-10-27 19:49:31,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:31,091 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256493714] [2020-10-27 19:49:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:31,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:31,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:31,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:31,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:49:31,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 19:49:31,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 839 [2020-10-27 19:49:31,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:31,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 19:49:31,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:31,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 19:49:31,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:32,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:32,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:32,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:32,786 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:32,786 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:32,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 19:49:32,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:32,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:32,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:32,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:32,810 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:32,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256493714] [2020-10-27 19:49:32,810 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:32,810 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 19:49:32,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966484136] [2020-10-27 19:49:32,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 19:49:32,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:32,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 19:49:32,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 19:49:32,811 INFO L87 Difference]: Start difference. First operand 1162 states and 1442 transitions. Second operand 14 states. [2020-10-27 19:49:33,283 WARN L193 SmtUtils]: Spent 284.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 103 [2020-10-27 19:49:33,457 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-10-27 19:49:33,843 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 90 [2020-10-27 19:49:35,265 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2020-10-27 19:49:35,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:35,643 INFO L93 Difference]: Finished difference Result 1185 states and 1466 transitions. [2020-10-27 19:49:35,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 19:49:35,643 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 50 [2020-10-27 19:49:35,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:35,647 INFO L225 Difference]: With dead ends: 1185 [2020-10-27 19:49:35,647 INFO L226 Difference]: Without dead ends: 1150 [2020-10-27 19:49:35,647 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2020-10-27 19:49:35,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1150 states. [2020-10-27 19:49:35,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1150 to 1150. [2020-10-27 19:49:35,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1150 states. [2020-10-27 19:49:35,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1150 states to 1150 states and 1429 transitions. [2020-10-27 19:49:35,749 INFO L78 Accepts]: Start accepts. Automaton has 1150 states and 1429 transitions. Word has length 50 [2020-10-27 19:49:35,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:35,749 INFO L481 AbstractCegarLoop]: Abstraction has 1150 states and 1429 transitions. [2020-10-27 19:49:35,749 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 19:49:35,749 INFO L276 IsEmpty]: Start isEmpty. Operand 1150 states and 1429 transitions. [2020-10-27 19:49:35,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:49:35,750 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:35,750 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 19:49:35,751 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 19:49:35,751 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:35,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:35,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1654696412, now seen corresponding path program 1 times [2020-10-27 19:49:35,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:35,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1768633625] [2020-10-27 19:49:35,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:35,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:35,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:36,043 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:36,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:37,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:37,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-27 19:49:40,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:41,267 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 19:49:41,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:41,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:41,273 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:41,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 19:49:41,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 19:49:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 19:49:41,274 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 19:49:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 19:49:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 19:49:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:41,289 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 19:49:41,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1768633625] [2020-10-27 19:49:41,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 19:49:41,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 19:49:41,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671479064] [2020-10-27 19:49:41,290 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 19:49:41,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 19:49:41,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 19:49:41,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-27 19:49:41,291 INFO L87 Difference]: Start difference. First operand 1150 states and 1429 transitions. Second operand 13 states. [2020-10-27 19:49:41,665 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2020-10-27 19:49:42,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 19:49:42,582 INFO L93 Difference]: Finished difference Result 1281 states and 1587 transitions. [2020-10-27 19:49:42,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 19:49:42,583 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 50 [2020-10-27 19:49:42,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 19:49:42,587 INFO L225 Difference]: With dead ends: 1281 [2020-10-27 19:49:42,587 INFO L226 Difference]: Without dead ends: 1195 [2020-10-27 19:49:42,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=88, Invalid=254, Unknown=0, NotChecked=0, Total=342 [2020-10-27 19:49:42,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2020-10-27 19:49:42,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 1168. [2020-10-27 19:49:42,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1168 states. [2020-10-27 19:49:42,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1168 states to 1168 states and 1447 transitions. [2020-10-27 19:49:42,674 INFO L78 Accepts]: Start accepts. Automaton has 1168 states and 1447 transitions. Word has length 50 [2020-10-27 19:49:42,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 19:49:42,674 INFO L481 AbstractCegarLoop]: Abstraction has 1168 states and 1447 transitions. [2020-10-27 19:49:42,674 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 19:49:42,674 INFO L276 IsEmpty]: Start isEmpty. Operand 1168 states and 1447 transitions. [2020-10-27 19:49:42,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 19:49:42,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 19:49:42,676 INFO L422 BasicCegarLoop]: trace histogram [4, 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, 1] [2020-10-27 19:49:42,676 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 19:49:42,676 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 19:49:42,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 19:49:42,676 INFO L82 PathProgramCache]: Analyzing trace with hash -187241163, now seen corresponding path program 3 times [2020-10-27 19:49:42,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 19:49:42,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486098333] [2020-10-27 19:49:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 19:49:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 19:49:42,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:43,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:43,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:44,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:45,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 19:49:47,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 19:49:47,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 19:49:47,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 19:49:47,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4913 [2020-10-27 19:49:47,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 19:49:47,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-27 19:49:47,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-27 19:49:47,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 19:49:47,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 19:49:59,805 WARN L193 SmtUtils]: Spent 9.16 s on a formula simplification. DAG size of input: 1046 DAG size of output: 109