/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/forester-heap/sll-01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 01:05:26,514 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 01:05:26,524 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 01:05:26,577 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 01:05:26,578 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 01:05:26,585 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 01:05:26,587 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 01:05:26,592 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 01:05:26,596 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 01:05:26,605 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 01:05:26,606 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 01:05:26,608 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 01:05:26,608 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 01:05:26,612 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 01:05:26,616 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 01:05:26,619 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 01:05:26,620 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 01:05:26,625 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 01:05:26,655 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 01:05:26,659 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 01:05:26,667 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 01:05:26,668 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 01:05:26,669 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 01:05:26,672 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 01:05:26,681 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 01:05:26,682 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 01:05:26,682 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 01:05:26,683 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 01:05:26,684 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 01:05:26,688 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 01:05:26,688 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 01:05:26,689 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 01:05:26,692 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 01:05:26,693 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 01:05:26,694 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 01:05:26,694 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 01:05:26,695 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 01:05:26,696 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 01:05:26,696 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 01:05:26,697 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 01:05:26,698 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 01:05:26,706 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 01:05:26,764 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 01:05:26,765 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 01:05:26,770 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 01:05:26,770 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 01:05:26,771 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 01:05:26,773 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 01:05:26,773 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 01:05:26,773 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 01:05:26,773 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 01:05:26,774 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 01:05:26,774 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 01:05:26,776 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 01:05:26,776 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 01:05:26,776 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 01:05:26,777 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 01:05:26,777 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 01:05:26,777 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 01:05:26,777 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 01:05:26,778 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 01:05:26,778 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 01:05:26,778 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 01:05:26,778 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:26,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 01:05:26,781 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 01:05:26,781 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 01:05:26,781 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 01:05:26,781 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 01:05:26,782 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 01:05:26,782 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 01:05:26,782 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 01:05:27,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 01:05:27,213 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 01:05:27,217 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 01:05:27,219 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 01:05:27,221 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 01:05:27,222 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/forester-heap/sll-01-1.i [2020-10-27 01:05:27,315 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/384143118/d63b5655d3314bd0a90c0772afdf0898/FLAGcf5258df5 [2020-10-27 01:05:28,182 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 01:05:28,185 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/forester-heap/sll-01-1.i [2020-10-27 01:05:28,202 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/384143118/d63b5655d3314bd0a90c0772afdf0898/FLAGcf5258df5 [2020-10-27 01:05:28,396 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/384143118/d63b5655d3314bd0a90c0772afdf0898 [2020-10-27 01:05:28,400 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 01:05:28,407 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 01:05:28,413 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:28,414 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 01:05:28,418 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 01:05:28,419 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:28,426 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19e70a86 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28, skipping insertion in model container [2020-10-27 01:05:28,426 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:28,437 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 01:05:28,517 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 01:05:28,850 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:28,862 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 01:05:28,921 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 01:05:28,985 INFO L208 MainTranslator]: Completed translation [2020-10-27 01:05:28,986 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28 WrapperNode [2020-10-27 01:05:28,986 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 01:05:28,987 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 01:05:28,988 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 01:05:28,988 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 01:05:29,005 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:29,005 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:29,038 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:29,039 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:29,091 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:29,102 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:29,107 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (1/1) ... [2020-10-27 01:05:29,114 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 01:05:29,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 01:05:29,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 01:05:29,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 01:05:29,118 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 01:05:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 01:05:29,206 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 01:05:29,207 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 01:05:29,207 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 01:05:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure __ctype_get_mb_cur_max [2020-10-27 01:05:29,208 INFO L130 BoogieDeclarations]: Found specification of procedure atof [2020-10-27 01:05:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure atoi [2020-10-27 01:05:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure atol [2020-10-27 01:05:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure atoll [2020-10-27 01:05:29,209 INFO L130 BoogieDeclarations]: Found specification of procedure strtod [2020-10-27 01:05:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtof [2020-10-27 01:05:29,210 INFO L130 BoogieDeclarations]: Found specification of procedure strtold [2020-10-27 01:05:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtol [2020-10-27 01:05:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtoul [2020-10-27 01:05:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtoq [2020-10-27 01:05:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtouq [2020-10-27 01:05:29,211 INFO L130 BoogieDeclarations]: Found specification of procedure strtoll [2020-10-27 01:05:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure strtoull [2020-10-27 01:05:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure l64a [2020-10-27 01:05:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure a64l [2020-10-27 01:05:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure select [2020-10-27 01:05:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure pselect [2020-10-27 01:05:29,212 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_major [2020-10-27 01:05:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_minor [2020-10-27 01:05:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure gnu_dev_makedev [2020-10-27 01:05:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure random [2020-10-27 01:05:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure srandom [2020-10-27 01:05:29,213 INFO L130 BoogieDeclarations]: Found specification of procedure initstate [2020-10-27 01:05:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure setstate [2020-10-27 01:05:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure random_r [2020-10-27 01:05:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure srandom_r [2020-10-27 01:05:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure initstate_r [2020-10-27 01:05:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure setstate_r [2020-10-27 01:05:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure rand [2020-10-27 01:05:29,214 INFO L130 BoogieDeclarations]: Found specification of procedure srand [2020-10-27 01:05:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure rand_r [2020-10-27 01:05:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure drand48 [2020-10-27 01:05:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure erand48 [2020-10-27 01:05:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48 [2020-10-27 01:05:29,215 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48 [2020-10-27 01:05:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48 [2020-10-27 01:05:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48 [2020-10-27 01:05:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure srand48 [2020-10-27 01:05:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure seed48 [2020-10-27 01:05:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48 [2020-10-27 01:05:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure drand48_r [2020-10-27 01:05:29,216 INFO L130 BoogieDeclarations]: Found specification of procedure erand48_r [2020-10-27 01:05:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure lrand48_r [2020-10-27 01:05:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure nrand48_r [2020-10-27 01:05:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure mrand48_r [2020-10-27 01:05:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure jrand48_r [2020-10-27 01:05:29,217 INFO L130 BoogieDeclarations]: Found specification of procedure srand48_r [2020-10-27 01:05:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure seed48_r [2020-10-27 01:05:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure lcong48_r [2020-10-27 01:05:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-27 01:05:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure calloc [2020-10-27 01:05:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure realloc [2020-10-27 01:05:29,218 INFO L130 BoogieDeclarations]: Found specification of procedure free [2020-10-27 01:05:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure cfree [2020-10-27 01:05:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure alloca [2020-10-27 01:05:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure valloc [2020-10-27 01:05:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure posix_memalign [2020-10-27 01:05:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure aligned_alloc [2020-10-27 01:05:29,219 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 01:05:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure atexit [2020-10-27 01:05:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure at_quick_exit [2020-10-27 01:05:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure on_exit [2020-10-27 01:05:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 01:05:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure quick_exit [2020-10-27 01:05:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure _Exit [2020-10-27 01:05:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure getenv [2020-10-27 01:05:29,220 INFO L130 BoogieDeclarations]: Found specification of procedure putenv [2020-10-27 01:05:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure setenv [2020-10-27 01:05:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure unsetenv [2020-10-27 01:05:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure clearenv [2020-10-27 01:05:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure mktemp [2020-10-27 01:05:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemp [2020-10-27 01:05:29,221 INFO L130 BoogieDeclarations]: Found specification of procedure mkstemps [2020-10-27 01:05:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure mkdtemp [2020-10-27 01:05:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure system [2020-10-27 01:05:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure realpath [2020-10-27 01:05:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure bsearch [2020-10-27 01:05:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure qsort [2020-10-27 01:05:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure abs [2020-10-27 01:05:29,222 INFO L130 BoogieDeclarations]: Found specification of procedure labs [2020-10-27 01:05:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure llabs [2020-10-27 01:05:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure div [2020-10-27 01:05:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure ldiv [2020-10-27 01:05:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure lldiv [2020-10-27 01:05:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt [2020-10-27 01:05:29,223 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt [2020-10-27 01:05:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure gcvt [2020-10-27 01:05:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt [2020-10-27 01:05:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt [2020-10-27 01:05:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qgcvt [2020-10-27 01:05:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure ecvt_r [2020-10-27 01:05:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure fcvt_r [2020-10-27 01:05:29,224 INFO L130 BoogieDeclarations]: Found specification of procedure qecvt_r [2020-10-27 01:05:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure qfcvt_r [2020-10-27 01:05:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure mblen [2020-10-27 01:05:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure mbtowc [2020-10-27 01:05:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure wctomb [2020-10-27 01:05:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure mbstowcs [2020-10-27 01:05:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure wcstombs [2020-10-27 01:05:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure rpmatch [2020-10-27 01:05:29,225 INFO L130 BoogieDeclarations]: Found specification of procedure getsubopt [2020-10-27 01:05:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure getloadavg [2020-10-27 01:05:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 01:05:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 01:05:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-27 01:05:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-27 01:05:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 01:05:29,226 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 01:05:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 01:05:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-27 01:05:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-10-27 01:05:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-10-27 01:05:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 01:05:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 01:05:29,227 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 01:05:29,228 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 01:05:29,228 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 01:05:29,228 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 01:05:29,989 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 01:05:29,989 INFO L298 CfgBuilder]: Removed 30 assume(true) statements. [2020-10-27 01:05:29,991 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:29 BoogieIcfgContainer [2020-10-27 01:05:29,992 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 01:05:29,994 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 01:05:29,994 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 01:05:29,998 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 01:05:29,999 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 01:05:28" (1/3) ... [2020-10-27 01:05:30,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0fbf54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:29, skipping insertion in model container [2020-10-27 01:05:30,000 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 01:05:28" (2/3) ... [2020-10-27 01:05:30,000 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4c0fbf54 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 01:05:30, skipping insertion in model container [2020-10-27 01:05:30,001 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 01:05:29" (3/3) ... [2020-10-27 01:05:30,003 INFO L111 eAbstractionObserver]: Analyzing ICFG sll-01-1.i [2020-10-27 01:05:30,022 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 01:05:30,029 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 01:05:30,045 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 01:05:30,082 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 01:05:30,083 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 01:05:30,083 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 01:05:30,083 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 01:05:30,083 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 01:05:30,083 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 01:05:30,084 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 01:05:30,084 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 01:05:30,109 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states. [2020-10-27 01:05:30,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-27 01:05:30,116 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:30,117 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:30,118 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:30,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:30,126 INFO L82 PathProgramCache]: Analyzing trace with hash 987864192, now seen corresponding path program 1 times [2020-10-27 01:05:30,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:30,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296199811] [2020-10-27 01:05:30,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:30,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:30,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:30,509 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 18 [2020-10-27 01:05:30,509 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:30,509 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 200 [2020-10-27 01:05:30,514 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:30,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:30,514 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:30,515 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:05:30,515 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-27 01:05:30,637 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:30,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:30,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:30,655 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:30,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:30,656 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:30,656 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-27 01:05:30,656 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:30,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:30,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:30,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:30,657 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:30,670 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 01:05:30,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296199811] [2020-10-27 01:05:30,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:30,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:30,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846140192] [2020-10-27 01:05:30,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:30,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:30,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:30,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:30,739 INFO L87 Difference]: Start difference. First operand 93 states. Second operand 4 states. [2020-10-27 01:05:31,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:31,079 INFO L93 Difference]: Finished difference Result 179 states and 324 transitions. [2020-10-27 01:05:31,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:31,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2020-10-27 01:05:31,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:31,093 INFO L225 Difference]: With dead ends: 179 [2020-10-27 01:05:31,094 INFO L226 Difference]: Without dead ends: 87 [2020-10-27 01:05:31,099 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 01:05:31,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-27 01:05:31,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 72. [2020-10-27 01:05:31,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-27 01:05:31,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2020-10-27 01:05:31,159 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 10 [2020-10-27 01:05:31,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:31,159 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2020-10-27 01:05:31,160 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:31,160 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2020-10-27 01:05:31,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:31,161 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:31,161 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:31,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 01:05:31,162 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:31,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:31,163 INFO L82 PathProgramCache]: Analyzing trace with hash 496275789, now seen corresponding path program 1 times [2020-10-27 01:05:31,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:31,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1346653239] [2020-10-27 01:05:31,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:31,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:31,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:31,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:31,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:31,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 217 [2020-10-27 01:05:31,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:31,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:31,409 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:31,409 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:31,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:31,473 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:31,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:31,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:31,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:05:31,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:31,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:31,489 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:31,496 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 01:05:31,496 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1346653239] [2020-10-27 01:05:31,497 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:31,497 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:31,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110639042] [2020-10-27 01:05:31,499 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:31,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:31,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:31,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:31,501 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand 5 states. [2020-10-27 01:05:31,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:31,839 INFO L93 Difference]: Finished difference Result 178 states and 231 transitions. [2020-10-27 01:05:31,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:31,839 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:05:31,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:31,842 INFO L225 Difference]: With dead ends: 178 [2020-10-27 01:05:31,842 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:05:31,844 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 01:05:31,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:05:31,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-27 01:05:31,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-27 01:05:31,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 94 transitions. [2020-10-27 01:05:31,860 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 94 transitions. Word has length 16 [2020-10-27 01:05:31,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:31,860 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 94 transitions. [2020-10-27 01:05:31,861 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:31,861 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 94 transitions. [2020-10-27 01:05:31,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:31,862 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:31,862 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:31,862 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 01:05:31,862 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:31,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:31,863 INFO L82 PathProgramCache]: Analyzing trace with hash 498122831, now seen corresponding path program 1 times [2020-10-27 01:05:31,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:31,864 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1895997025] [2020-10-27 01:05:31,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:31,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:31,895 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:31,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,064 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:32,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:32,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:32,065 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 179 [2020-10-27 01:05:32,065 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:32,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:32,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:32,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:32,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 01:05:32,120 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:32,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:32,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:32,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:32,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:32,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 01:05:32,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:32,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:32,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:32,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:32,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:32,139 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 01:05:32,140 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1895997025] [2020-10-27 01:05:32,140 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:32,140 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:32,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1870267669] [2020-10-27 01:05:32,141 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:32,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:32,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:32,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:32,142 INFO L87 Difference]: Start difference. First operand 74 states and 94 transitions. Second operand 5 states. [2020-10-27 01:05:32,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:32,436 INFO L93 Difference]: Finished difference Result 122 states and 156 transitions. [2020-10-27 01:05:32,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:32,436 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 16 [2020-10-27 01:05:32,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:32,438 INFO L225 Difference]: With dead ends: 122 [2020-10-27 01:05:32,438 INFO L226 Difference]: Without dead ends: 118 [2020-10-27 01:05:32,439 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 01:05:32,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-27 01:05:32,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 75. [2020-10-27 01:05:32,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-27 01:05:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 95 transitions. [2020-10-27 01:05:32,452 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 95 transitions. Word has length 16 [2020-10-27 01:05:32,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:32,452 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 95 transitions. [2020-10-27 01:05:32,452 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:32,453 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 95 transitions. [2020-10-27 01:05:32,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-27 01:05:32,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:32,453 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:32,454 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 01:05:32,454 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:32,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:32,455 INFO L82 PathProgramCache]: Analyzing trace with hash -2021837103, now seen corresponding path program 1 times [2020-10-27 01:05:32,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:32,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [826470756] [2020-10-27 01:05:32,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:32,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:32,482 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,828 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:32,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-10-27 01:05:32,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:32,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 354 [2020-10-27 01:05:32,829 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:32,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-27 01:05:32,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:32,893 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:32,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:32,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:32,900 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:32,900 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:32,900 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:32,901 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:32,901 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:32,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:32,901 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:32,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:32,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:32,906 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 01:05:32,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [826470756] [2020-10-27 01:05:32,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:32,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:32,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205276840] [2020-10-27 01:05:32,907 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:32,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:32,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:32,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:32,909 INFO L87 Difference]: Start difference. First operand 75 states and 95 transitions. Second operand 6 states. [2020-10-27 01:05:33,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:33,380 INFO L93 Difference]: Finished difference Result 200 states and 257 transitions. [2020-10-27 01:05:33,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:33,381 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 16 [2020-10-27 01:05:33,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:33,384 INFO L225 Difference]: With dead ends: 200 [2020-10-27 01:05:33,384 INFO L226 Difference]: Without dead ends: 140 [2020-10-27 01:05:33,386 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:33,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-27 01:05:33,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 73. [2020-10-27 01:05:33,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:05:33,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 91 transitions. [2020-10-27 01:05:33,397 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 91 transitions. Word has length 16 [2020-10-27 01:05:33,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:33,397 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 91 transitions. [2020-10-27 01:05:33,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:33,398 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 91 transitions. [2020-10-27 01:05:33,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-27 01:05:33,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:33,399 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:33,399 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 01:05:33,399 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:33,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:33,400 INFO L82 PathProgramCache]: Analyzing trace with hash -127648352, now seen corresponding path program 1 times [2020-10-27 01:05:33,400 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:33,400 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [588834977] [2020-10-27 01:05:33,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:33,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-27 01:05:33,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:33,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 56 [2020-10-27 01:05:33,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:33,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:05:33,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 01:05:33,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 15 [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:33,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:33,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [588834977] [2020-10-27 01:05:33,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:33,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:33,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126609650] [2020-10-27 01:05:33,572 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:33,573 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:33,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:33,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:33,575 INFO L87 Difference]: Start difference. First operand 73 states and 91 transitions. Second operand 4 states. [2020-10-27 01:05:33,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:33,790 INFO L93 Difference]: Finished difference Result 79 states and 97 transitions. [2020-10-27 01:05:33,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:33,791 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-27 01:05:33,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:33,792 INFO L225 Difference]: With dead ends: 79 [2020-10-27 01:05:33,792 INFO L226 Difference]: Without dead ends: 74 [2020-10-27 01:05:33,793 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 01:05:33,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-27 01:05:33,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 71. [2020-10-27 01:05:33,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:05:33,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 87 transitions. [2020-10-27 01:05:33,814 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 87 transitions. Word has length 21 [2020-10-27 01:05:33,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:33,815 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 87 transitions. [2020-10-27 01:05:33,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:33,815 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 87 transitions. [2020-10-27 01:05:33,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-27 01:05:33,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:33,816 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:33,817 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 01:05:33,817 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:33,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:33,821 INFO L82 PathProgramCache]: Analyzing trace with hash 334207909, now seen corresponding path program 1 times [2020-10-27 01:05:33,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:33,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [732378711] [2020-10-27 01:05:33,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:33,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:33,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:33,982 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:33,983 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-27 01:05:33,983 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:33,983 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 138 [2020-10-27 01:05:33,983 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:33,983 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:33,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:33,984 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-27 01:05:33,984 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,032 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:34,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,044 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,044 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:34,045 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,045 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-27 01:05:34,045 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:34,045 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:34,046 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,051 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 01:05:34,051 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [732378711] [2020-10-27 01:05:34,053 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:34,053 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:34,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200025152] [2020-10-27 01:05:34,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:34,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:34,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:34,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:34,056 INFO L87 Difference]: Start difference. First operand 71 states and 87 transitions. Second operand 5 states. [2020-10-27 01:05:34,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:34,287 INFO L93 Difference]: Finished difference Result 123 states and 153 transitions. [2020-10-27 01:05:34,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:34,288 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-27 01:05:34,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:34,289 INFO L225 Difference]: With dead ends: 123 [2020-10-27 01:05:34,289 INFO L226 Difference]: Without dead ends: 104 [2020-10-27 01:05:34,290 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 01:05:34,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-27 01:05:34,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 71. [2020-10-27 01:05:34,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-27 01:05:34,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 86 transitions. [2020-10-27 01:05:34,299 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 86 transitions. Word has length 22 [2020-10-27 01:05:34,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:34,299 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 86 transitions. [2020-10-27 01:05:34,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:34,300 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 86 transitions. [2020-10-27 01:05:34,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-27 01:05:34,301 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:34,301 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:34,301 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 01:05:34,301 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:34,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:34,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1622058487, now seen corresponding path program 1 times [2020-10-27 01:05:34,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:34,302 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870486028] [2020-10-27 01:05:34,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 34 [2020-10-27 01:05:34,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 61 [2020-10-27 01:05:34,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:34,379 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:05:34,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:34,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,415 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:34,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,422 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:34,423 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:34,423 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:34,423 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:34,423 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:34,423 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:34,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:34,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:34,428 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 01:05:34,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870486028] [2020-10-27 01:05:34,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:34,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:34,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648467073] [2020-10-27 01:05:34,430 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:34,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:34,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:34,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:34,431 INFO L87 Difference]: Start difference. First operand 71 states and 86 transitions. Second operand 4 states. [2020-10-27 01:05:34,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:34,626 INFO L93 Difference]: Finished difference Result 96 states and 118 transitions. [2020-10-27 01:05:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:34,628 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 26 [2020-10-27 01:05:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:34,629 INFO L225 Difference]: With dead ends: 96 [2020-10-27 01:05:34,629 INFO L226 Difference]: Without dead ends: 92 [2020-10-27 01:05:34,630 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 01:05:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-27 01:05:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 73. [2020-10-27 01:05:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-27 01:05:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 89 transitions. [2020-10-27 01:05:34,638 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 89 transitions. Word has length 26 [2020-10-27 01:05:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:34,638 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 89 transitions. [2020-10-27 01:05:34,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:34,639 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 89 transitions. [2020-10-27 01:05:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:34,639 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:34,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:34,640 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 01:05:34,640 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:34,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:34,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1263296047, now seen corresponding path program 1 times [2020-10-27 01:05:34,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:34,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933382057] [2020-10-27 01:05:34,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:34,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:34,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:34,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,211 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:35,212 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:35,212 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:35,212 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 557 [2020-10-27 01:05:35,212 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:35,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:35,212 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:35,213 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-27 01:05:35,213 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:35,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:35,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:35,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:35,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:35,301 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:35,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:35,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:35,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:35,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:35,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:35,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:35,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:35,309 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 01:05:35,310 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933382057] [2020-10-27 01:05:35,310 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:35,310 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:35,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241153018] [2020-10-27 01:05:35,311 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:35,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:35,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:35,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:35,312 INFO L87 Difference]: Start difference. First operand 73 states and 89 transitions. Second operand 6 states. [2020-10-27 01:05:35,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:35,837 INFO L93 Difference]: Finished difference Result 169 states and 213 transitions. [2020-10-27 01:05:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:35,839 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-27 01:05:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:35,842 INFO L225 Difference]: With dead ends: 169 [2020-10-27 01:05:35,842 INFO L226 Difference]: Without dead ends: 130 [2020-10-27 01:05:35,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:35,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-27 01:05:35,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 83. [2020-10-27 01:05:35,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-27 01:05:35,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2020-10-27 01:05:35,886 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 27 [2020-10-27 01:05:35,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:35,887 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2020-10-27 01:05:35,890 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:35,890 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2020-10-27 01:05:35,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-27 01:05:35,893 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:35,893 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:35,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 01:05:35,894 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:35,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2058594897, now seen corresponding path program 1 times [2020-10-27 01:05:35,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:35,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076463897] [2020-10-27 01:05:35,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:35,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:35,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:36,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-27 01:05:36,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:36,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 918 [2020-10-27 01:05:36,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:36,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:36,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:36,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:36,884 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:36,968 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:36,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:36,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:36,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:36,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:36,988 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:36,988 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 16 [2020-10-27 01:05:36,988 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:36,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:36,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:36,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:36,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:36,996 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 01:05:36,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076463897] [2020-10-27 01:05:36,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:36,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:05:36,999 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011211784] [2020-10-27 01:05:36,999 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:05:37,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:37,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:05:37,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:05:37,006 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand 7 states. [2020-10-27 01:05:37,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:37,581 INFO L93 Difference]: Finished difference Result 217 states and 274 transitions. [2020-10-27 01:05:37,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:37,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 27 [2020-10-27 01:05:37,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:37,584 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:05:37,584 INFO L226 Difference]: Without dead ends: 178 [2020-10-27 01:05:37,584 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:37,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-27 01:05:37,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 92. [2020-10-27 01:05:37,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-27 01:05:37,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 111 transitions. [2020-10-27 01:05:37,612 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 111 transitions. Word has length 27 [2020-10-27 01:05:37,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:37,612 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 111 transitions. [2020-10-27 01:05:37,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:05:37,612 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 111 transitions. [2020-10-27 01:05:37,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:37,616 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:37,616 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:37,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 01:05:37,616 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:37,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:37,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1688120956, now seen corresponding path program 1 times [2020-10-27 01:05:37,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:37,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [806231026] [2020-10-27 01:05:37,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:37,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:37,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:37,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:37,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:37,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-27 01:05:37,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:37,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:37,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-27 01:05:37,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-27 01:05:37,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:37,929 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:37,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:37,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:37,935 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:37,936 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:37,936 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:37,936 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:37,936 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:37,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:37,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:37,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:37,937 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:37,941 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 01:05:37,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [806231026] [2020-10-27 01:05:37,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:37,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:37,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386138173] [2020-10-27 01:05:37,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:37,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:37,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:37,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:37,943 INFO L87 Difference]: Start difference. First operand 92 states and 111 transitions. Second operand 6 states. [2020-10-27 01:05:38,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:38,270 INFO L93 Difference]: Finished difference Result 156 states and 194 transitions. [2020-10-27 01:05:38,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:38,271 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 29 [2020-10-27 01:05:38,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:38,272 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:05:38,272 INFO L226 Difference]: Without dead ends: 100 [2020-10-27 01:05:38,275 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-27 01:05:38,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 95. [2020-10-27 01:05:38,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-27 01:05:38,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 114 transitions. [2020-10-27 01:05:38,287 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 114 transitions. Word has length 29 [2020-10-27 01:05:38,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:38,289 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 114 transitions. [2020-10-27 01:05:38,289 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:38,290 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 114 transitions. [2020-10-27 01:05:38,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-27 01:05:38,297 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:38,297 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:38,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 01:05:38,298 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:38,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:38,298 INFO L82 PathProgramCache]: Analyzing trace with hash 833686020, now seen corresponding path program 1 times [2020-10-27 01:05:38,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:38,299 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344681831] [2020-10-27 01:05:38,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:38,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:38,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:38,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:38,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:38,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-27 01:05:38,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:38,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-27 01:05:38,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:38,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 01:05:38,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-27 01:05:38,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:38,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:38,562 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:38,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:38,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:38,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:38,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:38,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:38,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:38,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:38,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:38,574 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 01:05:38,574 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344681831] [2020-10-27 01:05:38,574 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:38,575 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:38,575 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531530379] [2020-10-27 01:05:38,575 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:38,575 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:38,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:38,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:38,576 INFO L87 Difference]: Start difference. First operand 95 states and 114 transitions. Second operand 5 states. [2020-10-27 01:05:38,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:38,852 INFO L93 Difference]: Finished difference Result 103 states and 122 transitions. [2020-10-27 01:05:38,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:38,852 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-27 01:05:38,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:38,854 INFO L225 Difference]: With dead ends: 103 [2020-10-27 01:05:38,854 INFO L226 Difference]: Without dead ends: 99 [2020-10-27 01:05:38,855 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 01:05:38,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-27 01:05:38,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 93. [2020-10-27 01:05:38,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-10-27 01:05:38,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2020-10-27 01:05:38,868 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 29 [2020-10-27 01:05:38,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:38,869 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2020-10-27 01:05:38,869 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:38,869 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2020-10-27 01:05:38,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-27 01:05:38,874 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:38,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:38,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-27 01:05:38,875 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:38,875 INFO L82 PathProgramCache]: Analyzing trace with hash -964421169, now seen corresponding path program 1 times [2020-10-27 01:05:38,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:38,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1564020035] [2020-10-27 01:05:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:38,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:38,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,102 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:39,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,318 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-27 01:05:40,318 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:40,318 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1410 [2020-10-27 01:05:40,318 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:40,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:40,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-27 01:05:40,319 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:40,490 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:40,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:40,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:40,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:40,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:40,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:40,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:40,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:40,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:40,507 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 01:05:40,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1564020035] [2020-10-27 01:05:40,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:40,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:40,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808246895] [2020-10-27 01:05:40,509 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:40,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:40,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:40,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:40,510 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand 8 states. [2020-10-27 01:05:41,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:41,230 INFO L93 Difference]: Finished difference Result 176 states and 217 transitions. [2020-10-27 01:05:41,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:41,231 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 30 [2020-10-27 01:05:41,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:41,233 INFO L225 Difference]: With dead ends: 176 [2020-10-27 01:05:41,233 INFO L226 Difference]: Without dead ends: 172 [2020-10-27 01:05:41,233 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 01:05:41,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-27 01:05:41,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 96. [2020-10-27 01:05:41,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-27 01:05:41,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 114 transitions. [2020-10-27 01:05:41,244 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 114 transitions. Word has length 30 [2020-10-27 01:05:41,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:41,244 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 114 transitions. [2020-10-27 01:05:41,244 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:41,244 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 114 transitions. [2020-10-27 01:05:41,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:05:41,245 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:41,245 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:41,245 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-27 01:05:41,245 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:41,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:41,246 INFO L82 PathProgramCache]: Analyzing trace with hash -1480227389, now seen corresponding path program 1 times [2020-10-27 01:05:41,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:41,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1995554634] [2020-10-27 01:05:41,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:41,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:41,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,280 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,679 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:41,679 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:05:41,679 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:41,679 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 420 [2020-10-27 01:05:41,680 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:41,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-27 01:05:41,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-27 01:05:41,680 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-27 01:05:41,680 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:41,740 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:41,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:41,746 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:41,746 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:41,747 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:41,747 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:41,747 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:41,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:41,747 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:41,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:41,748 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:41,756 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:41,757 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1995554634] [2020-10-27 01:05:41,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:41,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-27 01:05:41,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742998418] [2020-10-27 01:05:41,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:41,758 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:41,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:41,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:41,759 INFO L87 Difference]: Start difference. First operand 96 states and 114 transitions. Second operand 5 states. [2020-10-27 01:05:42,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:42,045 INFO L93 Difference]: Finished difference Result 139 states and 169 transitions. [2020-10-27 01:05:42,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-27 01:05:42,045 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 32 [2020-10-27 01:05:42,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:42,046 INFO L225 Difference]: With dead ends: 139 [2020-10-27 01:05:42,047 INFO L226 Difference]: Without dead ends: 121 [2020-10-27 01:05:42,047 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 01:05:42,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-27 01:05:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 115. [2020-10-27 01:05:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-27 01:05:42,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 141 transitions. [2020-10-27 01:05:42,059 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 141 transitions. Word has length 32 [2020-10-27 01:05:42,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:42,059 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 141 transitions. [2020-10-27 01:05:42,060 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:42,060 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 141 transitions. [2020-10-27 01:05:42,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-27 01:05:42,061 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:42,061 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] [2020-10-27 01:05:42,061 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-27 01:05:42,061 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:42,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:42,062 INFO L82 PathProgramCache]: Analyzing trace with hash 1868212567, now seen corresponding path program 1 times [2020-10-27 01:05:42,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:42,062 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967247421] [2020-10-27 01:05:42,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:42,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-27 01:05:42,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:42,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 182 [2020-10-27 01:05:42,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:05:42,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:42,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-27 01:05:42,276 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:42,385 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:42,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:42,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:42,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:42,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:42,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:42,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:42,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:42,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:42,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967247421] [2020-10-27 01:05:42,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:42,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 01:05:42,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640045353] [2020-10-27 01:05:42,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:42,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:42,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:42,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:42,405 INFO L87 Difference]: Start difference. First operand 115 states and 141 transitions. Second operand 6 states. [2020-10-27 01:05:42,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:42,887 INFO L93 Difference]: Finished difference Result 195 states and 244 transitions. [2020-10-27 01:05:42,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:05:42,888 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 32 [2020-10-27 01:05:42,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:42,889 INFO L225 Difference]: With dead ends: 195 [2020-10-27 01:05:42,889 INFO L226 Difference]: Without dead ends: 137 [2020-10-27 01:05:42,890 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:42,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-27 01:05:42,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 117. [2020-10-27 01:05:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-27 01:05:42,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2020-10-27 01:05:42,902 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 32 [2020-10-27 01:05:42,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:42,903 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2020-10-27 01:05:42,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:42,903 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2020-10-27 01:05:42,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-27 01:05:42,904 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:42,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:42,904 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-27 01:05:42,904 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:42,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:42,905 INFO L82 PathProgramCache]: Analyzing trace with hash 2008414403, now seen corresponding path program 1 times [2020-10-27 01:05:42,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:42,905 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [639667146] [2020-10-27 01:05:42,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:42,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:42,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:42,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,200 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-27 01:05:43,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:05:43,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 707 [2020-10-27 01:05:43,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:43,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:43,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,764 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:43,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:43,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:43,771 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:43,771 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:43,771 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:43,772 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:05:43,772 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:43,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:43,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:43,772 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:43,772 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:43,782 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 01:05:43,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [639667146] [2020-10-27 01:05:43,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:43,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2020-10-27 01:05:43,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571377581] [2020-10-27 01:05:43,783 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:43,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:43,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:43,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:43,784 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand 8 states. [2020-10-27 01:05:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:44,503 INFO L93 Difference]: Finished difference Result 161 states and 193 transitions. [2020-10-27 01:05:44,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:05:44,504 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 33 [2020-10-27 01:05:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:44,505 INFO L225 Difference]: With dead ends: 161 [2020-10-27 01:05:44,505 INFO L226 Difference]: Without dead ends: 157 [2020-10-27 01:05:44,506 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 01:05:44,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-10-27 01:05:44,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 120. [2020-10-27 01:05:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-27 01:05:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 144 transitions. [2020-10-27 01:05:44,517 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 144 transitions. Word has length 33 [2020-10-27 01:05:44,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:44,518 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 144 transitions. [2020-10-27 01:05:44,518 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 144 transitions. [2020-10-27 01:05:44,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-27 01:05:44,519 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:44,519 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, 1] [2020-10-27 01:05:44,519 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-27 01:05:44,519 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:44,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1268821399, now seen corresponding path program 1 times [2020-10-27 01:05:44,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:44,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [501465588] [2020-10-27 01:05:44,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:44,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:44,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,553 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:44,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-27 01:05:45,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:05:45,132 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 599 [2020-10-27 01:05:45,132 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:45,133 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-27 01:05:45,133 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:45,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,216 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:45,216 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:45,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:45,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,227 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:05:45,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [501465588] [2020-10-27 01:05:45,228 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:45,228 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 01:05:45,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25575100] [2020-10-27 01:05:45,229 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 01:05:45,229 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:45,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 01:05:45,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:45,230 INFO L87 Difference]: Start difference. First operand 120 states and 144 transitions. Second operand 5 states. [2020-10-27 01:05:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:45,515 INFO L93 Difference]: Finished difference Result 158 states and 189 transitions. [2020-10-27 01:05:45,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 01:05:45,515 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 35 [2020-10-27 01:05:45,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:45,516 INFO L225 Difference]: With dead ends: 158 [2020-10-27 01:05:45,516 INFO L226 Difference]: Without dead ends: 125 [2020-10-27 01:05:45,517 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-27 01:05:45,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-27 01:05:45,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 118. [2020-10-27 01:05:45,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-27 01:05:45,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 143 transitions. [2020-10-27 01:05:45,528 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 143 transitions. Word has length 35 [2020-10-27 01:05:45,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:45,528 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 143 transitions. [2020-10-27 01:05:45,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 01:05:45,528 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 143 transitions. [2020-10-27 01:05:45,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:05:45,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:45,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:45,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-27 01:05:45,529 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:45,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:45,530 INFO L82 PathProgramCache]: Analyzing trace with hash -597960010, now seen corresponding path program 1 times [2020-10-27 01:05:45,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:45,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506646203] [2020-10-27 01:05:45,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:45,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,597 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:05:45,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 54 [2020-10-27 01:05:45,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:45,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-10-27 01:05:45,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-27 01:05:45,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:45,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,641 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:45,642 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:45,642 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:45,642 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,647 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:45,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506646203] [2020-10-27 01:05:45,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:45,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:45,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [13204648] [2020-10-27 01:05:45,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:45,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:45,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:45,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:45,649 INFO L87 Difference]: Start difference. First operand 118 states and 143 transitions. Second operand 4 states. [2020-10-27 01:05:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:45,820 INFO L93 Difference]: Finished difference Result 156 states and 192 transitions. [2020-10-27 01:05:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:45,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 01:05:45,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:45,822 INFO L225 Difference]: With dead ends: 156 [2020-10-27 01:05:45,822 INFO L226 Difference]: Without dead ends: 152 [2020-10-27 01:05:45,822 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 01:05:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-27 01:05:45,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2020-10-27 01:05:45,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-27 01:05:45,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 177 transitions. [2020-10-27 01:05:45,835 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 177 transitions. Word has length 37 [2020-10-27 01:05:45,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:45,835 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 177 transitions. [2020-10-27 01:05:45,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:45,835 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 177 transitions. [2020-10-27 01:05:45,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-27 01:05:45,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:45,836 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:45,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-27 01:05:45,836 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:45,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:45,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1877823688, now seen corresponding path program 1 times [2020-10-27 01:05:45,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:45,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78456488] [2020-10-27 01:05:45,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:45,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-27 01:05:45,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 43 [2020-10-27 01:05:45,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 01:05:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-27 01:05:45,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-27 01:05:45,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:45,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:45,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:45,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:45,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:45,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:45,930 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:45,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:45,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:45,931 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:45,931 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:45,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:45,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78456488] [2020-10-27 01:05:45,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:45,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-27 01:05:45,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141027762] [2020-10-27 01:05:45,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 01:05:45,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 01:05:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 01:05:45,937 INFO L87 Difference]: Start difference. First operand 145 states and 177 transitions. Second operand 4 states. [2020-10-27 01:05:46,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:46,128 INFO L93 Difference]: Finished difference Result 249 states and 314 transitions. [2020-10-27 01:05:46,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-27 01:05:46,129 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-27 01:05:46,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:46,130 INFO L225 Difference]: With dead ends: 249 [2020-10-27 01:05:46,130 INFO L226 Difference]: Without dead ends: 159 [2020-10-27 01:05:46,131 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 01:05:46,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-27 01:05:46,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 140. [2020-10-27 01:05:46,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:05:46,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 172 transitions. [2020-10-27 01:05:46,145 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 172 transitions. Word has length 37 [2020-10-27 01:05:46,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:46,145 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 172 transitions. [2020-10-27 01:05:46,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 01:05:46,145 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 172 transitions. [2020-10-27 01:05:46,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-27 01:05:46,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:46,146 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, 1, 1] [2020-10-27 01:05:46,146 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-27 01:05:46,146 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:46,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:46,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1364392718, now seen corresponding path program 1 times [2020-10-27 01:05:46,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:46,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1458710754] [2020-10-27 01:05:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:46,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:46,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:46,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:48,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:48,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-27 01:05:48,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:05:48,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2653 [2020-10-27 01:05:48,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:48,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 01:05:48,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:48,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-27 01:05:48,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:49,028 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:49,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:49,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:49,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:49,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:49,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:49,035 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:49,035 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:49,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:49,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:49,047 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:05:49,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1458710754] [2020-10-27 01:05:49,047 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:49,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:05:49,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038180949] [2020-10-27 01:05:49,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:05:49,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:49,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:05:49,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:05:49,050 INFO L87 Difference]: Start difference. First operand 140 states and 172 transitions. Second operand 8 states. [2020-10-27 01:05:49,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:49,771 INFO L93 Difference]: Finished difference Result 190 states and 229 transitions. [2020-10-27 01:05:49,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:49,772 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 38 [2020-10-27 01:05:49,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:49,773 INFO L225 Difference]: With dead ends: 190 [2020-10-27 01:05:49,773 INFO L226 Difference]: Without dead ends: 145 [2020-10-27 01:05:49,774 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:05:49,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-27 01:05:49,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 121. [2020-10-27 01:05:49,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-27 01:05:49,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 143 transitions. [2020-10-27 01:05:49,793 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 143 transitions. Word has length 38 [2020-10-27 01:05:49,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:49,794 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 143 transitions. [2020-10-27 01:05:49,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:05:49,794 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 143 transitions. [2020-10-27 01:05:49,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:05:49,794 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:49,795 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, 1, 1, 1, 1, 1] [2020-10-27 01:05:49,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-27 01:05:49,795 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:49,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:49,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1818243446, now seen corresponding path program 1 times [2020-10-27 01:05:49,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:49,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497100499] [2020-10-27 01:05:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:49,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:49,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:49,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:50,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:51,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:51,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:05:51,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:05:51,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2149 [2020-10-27 01:05:51,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:05:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:51,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-27 01:05:51,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:52,333 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:52,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:52,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:52,338 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:52,338 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:52,338 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:52,339 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:52,339 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:52,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:52,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:52,339 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:52,339 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:52,352 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 01:05:52,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497100499] [2020-10-27 01:05:52,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:52,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:05:52,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1463544679] [2020-10-27 01:05:52,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:05:52,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:05:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:05:52,355 INFO L87 Difference]: Start difference. First operand 121 states and 143 transitions. Second operand 10 states. [2020-10-27 01:05:53,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:53,508 INFO L93 Difference]: Finished difference Result 266 states and 329 transitions. [2020-10-27 01:05:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:05:53,509 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 39 [2020-10-27 01:05:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:53,510 INFO L225 Difference]: With dead ends: 266 [2020-10-27 01:05:53,510 INFO L226 Difference]: Without dead ends: 216 [2020-10-27 01:05:53,511 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:05:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-27 01:05:53,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 140. [2020-10-27 01:05:53,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-27 01:05:53,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 165 transitions. [2020-10-27 01:05:53,526 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 165 transitions. Word has length 39 [2020-10-27 01:05:53,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:53,526 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 165 transitions. [2020-10-27 01:05:53,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:05:53,527 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 165 transitions. [2020-10-27 01:05:53,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-27 01:05:53,527 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:53,527 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, 1, 1, 1, 1, 1] [2020-10-27 01:05:53,527 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-27 01:05:53,528 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:53,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:53,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1286138102, now seen corresponding path program 1 times [2020-10-27 01:05:53,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:53,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [818980810] [2020-10-27 01:05:53,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:53,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:53,555 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:53,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:53,981 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-27 01:05:53,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 01:05:53,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 435 [2020-10-27 01:05:53,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-27 01:05:53,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:54,116 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:54,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:54,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:54,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:54,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:54,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:54,122 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:05:54,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:54,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:54,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:54,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:54,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:54,132 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 01:05:54,133 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [818980810] [2020-10-27 01:05:54,133 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:54,133 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:05:54,133 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851817921] [2020-10-27 01:05:54,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:05:54,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:54,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:05:54,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:54,135 INFO L87 Difference]: Start difference. First operand 140 states and 165 transitions. Second operand 9 states. [2020-10-27 01:05:54,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:54,744 INFO L93 Difference]: Finished difference Result 300 states and 375 transitions. [2020-10-27 01:05:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:05:54,744 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 39 [2020-10-27 01:05:54,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:54,746 INFO L225 Difference]: With dead ends: 300 [2020-10-27 01:05:54,746 INFO L226 Difference]: Without dead ends: 250 [2020-10-27 01:05:54,747 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:05:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-27 01:05:54,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 143. [2020-10-27 01:05:54,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-27 01:05:54,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 168 transitions. [2020-10-27 01:05:54,762 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 168 transitions. Word has length 39 [2020-10-27 01:05:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:54,763 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 168 transitions. [2020-10-27 01:05:54,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:05:54,763 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 168 transitions. [2020-10-27 01:05:54,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 01:05:54,764 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:54,764 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:54,764 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-27 01:05:54,764 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:54,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:54,765 INFO L82 PathProgramCache]: Analyzing trace with hash -663927178, now seen corresponding path program 1 times [2020-10-27 01:05:54,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:54,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [404909497] [2020-10-27 01:05:54,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:54,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:54,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:55,284 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:55,284 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-27 01:05:55,284 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:55,285 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 492 [2020-10-27 01:05:55,285 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:05:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:55,285 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:05:55,285 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:55,712 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:55,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:55,719 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:55,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:55,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:55,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:05:55,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:55,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:55,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:55,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:55,741 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 01:05:55,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [404909497] [2020-10-27 01:05:55,742 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:05:55,742 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:05:55,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123261757] [2020-10-27 01:05:55,743 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:05:55,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:55,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:05:55,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:05:55,745 INFO L87 Difference]: Start difference. First operand 143 states and 168 transitions. Second operand 11 states. [2020-10-27 01:05:56,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:56,880 INFO L93 Difference]: Finished difference Result 253 states and 310 transitions. [2020-10-27 01:05:56,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:05:56,884 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 42 [2020-10-27 01:05:56,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:56,886 INFO L225 Difference]: With dead ends: 253 [2020-10-27 01:05:56,886 INFO L226 Difference]: Without dead ends: 249 [2020-10-27 01:05:56,887 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:05:56,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2020-10-27 01:05:56,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 146. [2020-10-27 01:05:56,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:05:56,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 171 transitions. [2020-10-27 01:05:56,905 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 171 transitions. Word has length 42 [2020-10-27 01:05:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:56,906 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 171 transitions. [2020-10-27 01:05:56,906 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:05:56,906 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 171 transitions. [2020-10-27 01:05:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-27 01:05:56,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:56,907 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:56,907 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-27 01:05:56,907 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:56,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:56,908 INFO L82 PathProgramCache]: Analyzing trace with hash 696381250, now seen corresponding path program 1 times [2020-10-27 01:05:56,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:56,908 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [315927276] [2020-10-27 01:05:56,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:56,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:56,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:56,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:57,038 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:58,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-27 01:05:58,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:05:58,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1548 [2020-10-27 01:05:58,470 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 01:05:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:05:58,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:05:58,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:58,529 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:05:58,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:58,532 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:58,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:05:58,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:05:58,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:05:58,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:05:58,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:05:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:05:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:05:58,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:05:58,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:05:58,548 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:05:58,548 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [315927276] [2020-10-27 01:05:58,548 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:05:58,548 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 01:05:58,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [46508011] [2020-10-27 01:05:58,549 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 01:05:58,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:05:58,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 01:05:58,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-27 01:05:58,550 INFO L87 Difference]: Start difference. First operand 146 states and 171 transitions. Second operand 6 states. [2020-10-27 01:05:58,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:05:58,924 INFO L93 Difference]: Finished difference Result 173 states and 202 transitions. [2020-10-27 01:05:58,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:05:58,925 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 43 [2020-10-27 01:05:58,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:05:58,926 INFO L225 Difference]: With dead ends: 173 [2020-10-27 01:05:58,926 INFO L226 Difference]: Without dead ends: 169 [2020-10-27 01:05:58,927 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:05:58,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-27 01:05:58,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 146. [2020-10-27 01:05:58,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-27 01:05:58,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 170 transitions. [2020-10-27 01:05:58,943 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 170 transitions. Word has length 43 [2020-10-27 01:05:58,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:05:58,944 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 170 transitions. [2020-10-27 01:05:58,944 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 01:05:58,944 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 170 transitions. [2020-10-27 01:05:58,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:05:58,945 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:05:58,945 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:05:58,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-27 01:05:58,945 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:05:58,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:05:58,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1924832086, now seen corresponding path program 1 times [2020-10-27 01:05:58,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:05:58,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384041041] [2020-10-27 01:05:58,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:05:58,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:05:58,970 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:05:59,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,477 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:02,477 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:06:02,477 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:06:02,477 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3515 [2020-10-27 01:06:02,477 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:02,477 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:02,478 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-27 01:06:02,478 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:02,773 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:02,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:02,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:02,779 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:02,780 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:02,780 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:02,780 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:02,780 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:02,780 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:02,781 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:02,781 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:02,795 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:06:02,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384041041] [2020-10-27 01:06:02,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:02,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:02,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986531377] [2020-10-27 01:06:02,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:02,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:02,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:02,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:02,798 INFO L87 Difference]: Start difference. First operand 146 states and 170 transitions. Second operand 10 states. [2020-10-27 01:06:03,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:03,482 INFO L93 Difference]: Finished difference Result 217 states and 261 transitions. [2020-10-27 01:06:03,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:06:03,482 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 44 [2020-10-27 01:06:03,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:03,484 INFO L225 Difference]: With dead ends: 217 [2020-10-27 01:06:03,484 INFO L226 Difference]: Without dead ends: 199 [2020-10-27 01:06:03,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:03,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-27 01:06:03,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 176. [2020-10-27 01:06:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-27 01:06:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 212 transitions. [2020-10-27 01:06:03,503 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 212 transitions. Word has length 44 [2020-10-27 01:06:03,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:03,503 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 212 transitions. [2020-10-27 01:06:03,503 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:03,503 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 212 transitions. [2020-10-27 01:06:03,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:06:03,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:03,504 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:03,504 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-27 01:06:03,504 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:03,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:03,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1423607870, now seen corresponding path program 1 times [2020-10-27 01:06:03,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:03,505 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020557058] [2020-10-27 01:06:03,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:03,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:03,528 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:03,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:03,902 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:06:03,902 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:03,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-10-27 01:06:03,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:03,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-27 01:06:03,903 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:04,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:04,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:04,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:04,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:04,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:04,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:06:04,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:04,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:04,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:04,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:04,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:04,210 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 01:06:04,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020557058] [2020-10-27 01:06:04,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:04,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:04,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872922128] [2020-10-27 01:06:04,212 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:04,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:04,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:04,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:04,214 INFO L87 Difference]: Start difference. First operand 176 states and 212 transitions. Second operand 9 states. [2020-10-27 01:06:05,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:05,300 INFO L93 Difference]: Finished difference Result 513 states and 654 transitions. [2020-10-27 01:06:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:06:05,301 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-27 01:06:05,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:05,304 INFO L225 Difference]: With dead ends: 513 [2020-10-27 01:06:05,304 INFO L226 Difference]: Without dead ends: 433 [2020-10-27 01:06:05,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2020-10-27 01:06:05,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 251. [2020-10-27 01:06:05,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 251 states. [2020-10-27 01:06:05,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 303 transitions. [2020-10-27 01:06:05,331 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 303 transitions. Word has length 44 [2020-10-27 01:06:05,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:05,331 INFO L481 AbstractCegarLoop]: Abstraction has 251 states and 303 transitions. [2020-10-27 01:06:05,332 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:05,332 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 303 transitions. [2020-10-27 01:06:05,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-27 01:06:05,333 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:05,333 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:05,333 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-27 01:06:05,333 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:05,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:05,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1204753152, now seen corresponding path program 1 times [2020-10-27 01:06:05,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:05,334 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [432583137] [2020-10-27 01:06:05,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:05,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:05,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:06,462 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:06,463 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 01:06:06,463 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:06:06,463 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1115 [2020-10-27 01:06:06,463 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:06,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:06,464 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-27 01:06:06,464 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:06,669 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:06,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:06,674 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:06,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:06,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:06,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:06,675 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:06,675 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:06,675 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:06,688 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 01:06:06,688 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [432583137] [2020-10-27 01:06:06,688 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:06,688 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:06,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1299439780] [2020-10-27 01:06:06,689 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:06,689 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:06,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:06,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:06,690 INFO L87 Difference]: Start difference. First operand 251 states and 303 transitions. Second operand 9 states. [2020-10-27 01:06:08,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:08,086 INFO L93 Difference]: Finished difference Result 516 states and 649 transitions. [2020-10-27 01:06:08,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:06:08,086 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 44 [2020-10-27 01:06:08,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:08,089 INFO L225 Difference]: With dead ends: 516 [2020-10-27 01:06:08,089 INFO L226 Difference]: Without dead ends: 436 [2020-10-27 01:06:08,090 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:08,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2020-10-27 01:06:08,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 333. [2020-10-27 01:06:08,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333 states. [2020-10-27 01:06:08,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 407 transitions. [2020-10-27 01:06:08,120 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 407 transitions. Word has length 44 [2020-10-27 01:06:08,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:08,121 INFO L481 AbstractCegarLoop]: Abstraction has 333 states and 407 transitions. [2020-10-27 01:06:08,121 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:08,121 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 407 transitions. [2020-10-27 01:06:08,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-27 01:06:08,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:08,122 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:08,122 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-27 01:06:08,122 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:08,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:08,123 INFO L82 PathProgramCache]: Analyzing trace with hash -981911876, now seen corresponding path program 1 times [2020-10-27 01:06:08,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:08,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412518732] [2020-10-27 01:06:08,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:08,162 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:08,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:09,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-27 01:06:09,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:09,128 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 980 [2020-10-27 01:06:09,128 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:09,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:09,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:09,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-27 01:06:09,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:09,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:09,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:09,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:09,623 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:09,623 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:09,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:09,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:09,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:09,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:09,643 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 01:06:09,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412518732] [2020-10-27 01:06:09,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:09,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:09,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324232661] [2020-10-27 01:06:09,644 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:09,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:09,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:09,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:09,645 INFO L87 Difference]: Start difference. First operand 333 states and 407 transitions. Second operand 11 states. [2020-10-27 01:06:10,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:10,628 INFO L93 Difference]: Finished difference Result 407 states and 498 transitions. [2020-10-27 01:06:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:10,629 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 45 [2020-10-27 01:06:10,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:10,632 INFO L225 Difference]: With dead ends: 407 [2020-10-27 01:06:10,632 INFO L226 Difference]: Without dead ends: 403 [2020-10-27 01:06:10,633 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:06:10,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2020-10-27 01:06:10,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 342. [2020-10-27 01:06:10,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-27 01:06:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 416 transitions. [2020-10-27 01:06:10,678 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 416 transitions. Word has length 45 [2020-10-27 01:06:10,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:10,679 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 416 transitions. [2020-10-27 01:06:10,679 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 416 transitions. [2020-10-27 01:06:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-27 01:06:10,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:10,680 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:10,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-27 01:06:10,681 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1386770188, now seen corresponding path program 1 times [2020-10-27 01:06:10,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:10,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342879582] [2020-10-27 01:06:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:10,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,741 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:10,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:11,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:14,476 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-27 01:06:14,476 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:06:14,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3779 [2020-10-27 01:06:14,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:06:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:14,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:06:14,477 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:14,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:14,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:14,626 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:14,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:14,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:14,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:14,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:14,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:14,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:14,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:14,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:14,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:14,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342879582] [2020-10-27 01:06:14,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:14,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:06:14,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590228700] [2020-10-27 01:06:14,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:06:14,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:14,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:06:14,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:06:14,650 INFO L87 Difference]: Start difference. First operand 342 states and 416 transitions. Second operand 7 states. [2020-10-27 01:06:15,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:15,165 INFO L93 Difference]: Finished difference Result 362 states and 439 transitions. [2020-10-27 01:06:15,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 01:06:15,166 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 46 [2020-10-27 01:06:15,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:15,168 INFO L225 Difference]: With dead ends: 362 [2020-10-27 01:06:15,168 INFO L226 Difference]: Without dead ends: 358 [2020-10-27 01:06:15,168 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:15,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2020-10-27 01:06:15,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 342. [2020-10-27 01:06:15,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 342 states. [2020-10-27 01:06:15,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 415 transitions. [2020-10-27 01:06:15,222 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 415 transitions. Word has length 46 [2020-10-27 01:06:15,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:15,222 INFO L481 AbstractCegarLoop]: Abstraction has 342 states and 415 transitions. [2020-10-27 01:06:15,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:06:15,222 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 415 transitions. [2020-10-27 01:06:15,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:06:15,223 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:15,223 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:15,223 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-27 01:06:15,224 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:15,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:15,224 INFO L82 PathProgramCache]: Analyzing trace with hash 1729433936, now seen corresponding path program 1 times [2020-10-27 01:06:15,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:15,224 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [19407177] [2020-10-27 01:06:15,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:15,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:15,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,257 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,843 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:15,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:06:16,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:06:16,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1084 [2020-10-27 01:06:16,323 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:16,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-27 01:06:16,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:16,436 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:16,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:16,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:16,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:16,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:16,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:16,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:16,441 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:16,441 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:16,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:16,452 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:16,453 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [19407177] [2020-10-27 01:06:16,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:16,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:16,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751558290] [2020-10-27 01:06:16,453 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:16,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:16,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:16,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:16,454 INFO L87 Difference]: Start difference. First operand 342 states and 415 transitions. Second operand 9 states. [2020-10-27 01:06:17,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:17,228 INFO L93 Difference]: Finished difference Result 473 states and 587 transitions. [2020-10-27 01:06:17,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:17,229 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 47 [2020-10-27 01:06:17,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:17,233 INFO L225 Difference]: With dead ends: 473 [2020-10-27 01:06:17,233 INFO L226 Difference]: Without dead ends: 453 [2020-10-27 01:06:17,235 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:06:17,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2020-10-27 01:06:17,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 373. [2020-10-27 01:06:17,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-27 01:06:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 452 transitions. [2020-10-27 01:06:17,279 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 452 transitions. Word has length 47 [2020-10-27 01:06:17,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:17,280 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 452 transitions. [2020-10-27 01:06:17,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:17,280 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 452 transitions. [2020-10-27 01:06:17,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-27 01:06:17,281 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:17,281 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:17,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-27 01:06:17,282 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:17,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:17,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1467996354, now seen corresponding path program 1 times [2020-10-27 01:06:17,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:17,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [131276998] [2020-10-27 01:06:17,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:17,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:17,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:17,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:18,358 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-27 01:06:18,358 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:18,358 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-10-27 01:06:18,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:18,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:18,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-27 01:06:18,359 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:18,792 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:18,797 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:18,797 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:18,797 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:18,797 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:18,797 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:18,797 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:18,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:18,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:18,798 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:18,822 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 01:06:18,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [131276998] [2020-10-27 01:06:18,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:18,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:18,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127600144] [2020-10-27 01:06:18,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:18,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:18,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:18,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:18,828 INFO L87 Difference]: Start difference. First operand 373 states and 452 transitions. Second operand 10 states. [2020-10-27 01:06:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:20,257 INFO L93 Difference]: Finished difference Result 545 states and 677 transitions. [2020-10-27 01:06:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:06:20,258 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-27 01:06:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:20,261 INFO L225 Difference]: With dead ends: 545 [2020-10-27 01:06:20,261 INFO L226 Difference]: Without dead ends: 541 [2020-10-27 01:06:20,262 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:06:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 541 states. [2020-10-27 01:06:20,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 541 to 379. [2020-10-27 01:06:20,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 379 states. [2020-10-27 01:06:20,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 458 transitions. [2020-10-27 01:06:20,297 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 458 transitions. Word has length 47 [2020-10-27 01:06:20,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:20,297 INFO L481 AbstractCegarLoop]: Abstraction has 379 states and 458 transitions. [2020-10-27 01:06:20,297 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:20,298 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 458 transitions. [2020-10-27 01:06:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:06:20,299 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:20,299 INFO L422 BasicCegarLoop]: trace histogram [3, 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, 1, 1, 1] [2020-10-27 01:06:20,299 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-27 01:06:20,299 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:20,300 INFO L82 PathProgramCache]: Analyzing trace with hash -1192125048, now seen corresponding path program 2 times [2020-10-27 01:06:20,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:20,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1713950489] [2020-10-27 01:06:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:20,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:20,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,344 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,356 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:20,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,666 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:21,666 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:06:21,666 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:06:21,666 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1354 [2020-10-27 01:06:21,666 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:21,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:21,667 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-27 01:06:21,667 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:21,830 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:21,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:21,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:21,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:21,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:21,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:21,835 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:21,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:21,836 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:21,851 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1713950489] [2020-10-27 01:06:21,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:21,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:21,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415041608] [2020-10-27 01:06:21,852 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:21,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:21,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:21,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:21,852 INFO L87 Difference]: Start difference. First operand 379 states and 458 transitions. Second operand 10 states. [2020-10-27 01:06:22,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:22,880 INFO L93 Difference]: Finished difference Result 559 states and 685 transitions. [2020-10-27 01:06:22,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:06:22,880 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 49 [2020-10-27 01:06:22,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:22,883 INFO L225 Difference]: With dead ends: 559 [2020-10-27 01:06:22,883 INFO L226 Difference]: Without dead ends: 479 [2020-10-27 01:06:22,884 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:06:22,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2020-10-27 01:06:22,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 437. [2020-10-27 01:06:22,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 437 states. [2020-10-27 01:06:22,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 526 transitions. [2020-10-27 01:06:22,927 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 526 transitions. Word has length 49 [2020-10-27 01:06:22,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:22,927 INFO L481 AbstractCegarLoop]: Abstraction has 437 states and 526 transitions. [2020-10-27 01:06:22,927 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:22,927 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 526 transitions. [2020-10-27 01:06:22,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-27 01:06:22,928 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:22,928 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:22,928 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-27 01:06:22,929 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:22,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:22,929 INFO L82 PathProgramCache]: Analyzing trace with hash -2093571788, now seen corresponding path program 1 times [2020-10-27 01:06:22,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:22,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093300569] [2020-10-27 01:06:22,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:22,949 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:22,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:23,641 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:24,928 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:24,928 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-27 01:06:24,928 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:06:24,928 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1985 [2020-10-27 01:06:24,928 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 01:06:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:24,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-27 01:06:24,929 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:25,021 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:25,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:25,025 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:25,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:25,028 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:25,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 01:06:25,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:25,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:25,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:25,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:06:25,050 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093300569] [2020-10-27 01:06:25,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 01:06:25,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-10-27 01:06:25,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896507099] [2020-10-27 01:06:25,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 01:06:25,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 01:06:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-10-27 01:06:25,052 INFO L87 Difference]: Start difference. First operand 437 states and 526 transitions. Second operand 7 states. [2020-10-27 01:06:25,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:25,527 INFO L93 Difference]: Finished difference Result 456 states and 548 transitions. [2020-10-27 01:06:25,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-27 01:06:25,527 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-27 01:06:25,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:25,530 INFO L225 Difference]: With dead ends: 456 [2020-10-27 01:06:25,530 INFO L226 Difference]: Without dead ends: 423 [2020-10-27 01:06:25,530 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:25,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2020-10-27 01:06:25,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 408. [2020-10-27 01:06:25,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-27 01:06:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 496 transitions. [2020-10-27 01:06:25,564 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 496 transitions. Word has length 49 [2020-10-27 01:06:25,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:25,565 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 496 transitions. [2020-10-27 01:06:25,565 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 01:06:25,565 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 496 transitions. [2020-10-27 01:06:25,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:06:25,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:25,566 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:25,566 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-27 01:06:25,566 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:25,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:25,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1470623984, now seen corresponding path program 1 times [2020-10-27 01:06:25,567 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:25,567 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486699574] [2020-10-27 01:06:25,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:25,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,769 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:25,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,305 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:26,305 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:06:26,305 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:26,305 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 721 [2020-10-27 01:06:26,305 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:26,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:26,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:26,306 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-27 01:06:26,306 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:26,595 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:26,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:26,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:26,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:26,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:26,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:26,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:26,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:26,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:26,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:26,623 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 01:06:26,623 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486699574] [2020-10-27 01:06:26,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:26,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:26,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68792134] [2020-10-27 01:06:26,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:26,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:26,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:26,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:26,626 INFO L87 Difference]: Start difference. First operand 408 states and 496 transitions. Second operand 11 states. [2020-10-27 01:06:28,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:28,101 INFO L93 Difference]: Finished difference Result 578 states and 719 transitions. [2020-10-27 01:06:28,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:28,102 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 01:06:28,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:28,104 INFO L225 Difference]: With dead ends: 578 [2020-10-27 01:06:28,105 INFO L226 Difference]: Without dead ends: 574 [2020-10-27 01:06:28,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:06:28,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 574 states. [2020-10-27 01:06:28,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 574 to 414. [2020-10-27 01:06:28,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-27 01:06:28,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 502 transitions. [2020-10-27 01:06:28,145 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 502 transitions. Word has length 50 [2020-10-27 01:06:28,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:28,145 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 502 transitions. [2020-10-27 01:06:28,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:28,145 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 502 transitions. [2020-10-27 01:06:28,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2020-10-27 01:06:28,146 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:28,146 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:28,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-27 01:06:28,147 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:28,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:28,147 INFO L82 PathProgramCache]: Analyzing trace with hash 1129224857, now seen corresponding path program 1 times [2020-10-27 01:06:28,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:28,148 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2105912424] [2020-10-27 01:06:28,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:28,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:28,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:28,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:28,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:29,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:29,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 58 [2020-10-27 01:06:29,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:29,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 928 [2020-10-27 01:06:29,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:29,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:29,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:29,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 01:06:29,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:29,535 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:29,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:29,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:29,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:29,540 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:29,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:29,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:29,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:29,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:29,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:29,541 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:29,541 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:29,560 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:06:29,560 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2105912424] [2020-10-27 01:06:29,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:29,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:29,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693715] [2020-10-27 01:06:29,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:29,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:29,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:29,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:29,562 INFO L87 Difference]: Start difference. First operand 414 states and 502 transitions. Second operand 11 states. [2020-10-27 01:06:30,257 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 48 [2020-10-27 01:06:30,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:30,921 INFO L93 Difference]: Finished difference Result 528 states and 639 transitions. [2020-10-27 01:06:30,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-27 01:06:30,922 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 50 [2020-10-27 01:06:30,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:30,925 INFO L225 Difference]: With dead ends: 528 [2020-10-27 01:06:30,925 INFO L226 Difference]: Without dead ends: 359 [2020-10-27 01:06:30,926 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:06:30,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2020-10-27 01:06:30,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 338. [2020-10-27 01:06:30,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 338 states. [2020-10-27 01:06:30,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 386 transitions. [2020-10-27 01:06:30,961 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 386 transitions. Word has length 50 [2020-10-27 01:06:30,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:30,962 INFO L481 AbstractCegarLoop]: Abstraction has 338 states and 386 transitions. [2020-10-27 01:06:30,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:30,962 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 386 transitions. [2020-10-27 01:06:30,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-27 01:06:30,963 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:30,963 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:30,963 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-27 01:06:30,963 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:30,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:30,964 INFO L82 PathProgramCache]: Analyzing trace with hash 21725126, now seen corresponding path program 1 times [2020-10-27 01:06:30,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:30,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468719433] [2020-10-27 01:06:30,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:30,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:30,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:30,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,026 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:31,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:32,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:32,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-27 01:06:32,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:06:32,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1232 [2020-10-27 01:06:32,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:32,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-27 01:06:32,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:32,209 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 01:06:32,209 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:32,462 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:32,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:32,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:32,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:32,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:32,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:32,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:06:32,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:32,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:32,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:32,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:32,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:32,498 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:06:32,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468719433] [2020-10-27 01:06:32,499 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:32,499 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-27 01:06:32,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146646582] [2020-10-27 01:06:32,500 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 01:06:32,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:32,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 01:06:32,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-10-27 01:06:32,500 INFO L87 Difference]: Start difference. First operand 338 states and 386 transitions. Second operand 8 states. [2020-10-27 01:06:33,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:33,402 INFO L93 Difference]: Finished difference Result 437 states and 517 transitions. [2020-10-27 01:06:33,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 01:06:33,403 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 52 [2020-10-27 01:06:33,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:33,405 INFO L225 Difference]: With dead ends: 437 [2020-10-27 01:06:33,405 INFO L226 Difference]: Without dead ends: 419 [2020-10-27 01:06:33,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:33,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 419 states. [2020-10-27 01:06:33,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 419 to 408. [2020-10-27 01:06:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 408 states. [2020-10-27 01:06:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 484 transitions. [2020-10-27 01:06:33,449 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 484 transitions. Word has length 52 [2020-10-27 01:06:33,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:33,449 INFO L481 AbstractCegarLoop]: Abstraction has 408 states and 484 transitions. [2020-10-27 01:06:33,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 01:06:33,449 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 484 transitions. [2020-10-27 01:06:33,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:06:33,450 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:33,450 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:33,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-27 01:06:33,451 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:33,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:33,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1677713179, now seen corresponding path program 1 times [2020-10-27 01:06:33,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:33,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [975815932] [2020-10-27 01:06:33,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:33,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:33,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,576 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,665 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:33,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:34,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:36,122 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:36,123 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:06:36,123 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:06:36,123 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2655 [2020-10-27 01:06:36,123 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:36,123 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:06:36,123 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:36,466 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:36,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:36,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:36,471 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:36,471 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:36,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:36,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:36,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:36,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:36,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:36,492 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 01:06:36,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [975815932] [2020-10-27 01:06:36,493 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:36,493 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:36,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602558563] [2020-10-27 01:06:36,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:36,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:36,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:36,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:36,496 INFO L87 Difference]: Start difference. First operand 408 states and 484 transitions. Second operand 10 states. [2020-10-27 01:06:37,053 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 45 [2020-10-27 01:06:38,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:38,192 INFO L93 Difference]: Finished difference Result 591 states and 726 transitions. [2020-10-27 01:06:38,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:38,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 55 [2020-10-27 01:06:38,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:38,195 INFO L225 Difference]: With dead ends: 591 [2020-10-27 01:06:38,195 INFO L226 Difference]: Without dead ends: 511 [2020-10-27 01:06:38,196 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:38,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2020-10-27 01:06:38,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 414. [2020-10-27 01:06:38,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 414 states. [2020-10-27 01:06:38,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 490 transitions. [2020-10-27 01:06:38,241 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 490 transitions. Word has length 55 [2020-10-27 01:06:38,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:38,241 INFO L481 AbstractCegarLoop]: Abstraction has 414 states and 490 transitions. [2020-10-27 01:06:38,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:38,241 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 490 transitions. [2020-10-27 01:06:38,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-27 01:06:38,242 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:38,242 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:38,242 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-27 01:06:38,243 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:38,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:38,243 INFO L82 PathProgramCache]: Analyzing trace with hash 966906036, now seen corresponding path program 2 times [2020-10-27 01:06:38,243 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:38,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [578343462] [2020-10-27 01:06:38,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:38,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:38,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,276 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,451 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,744 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:38,884 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:40,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:43,168 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:43,168 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-27 01:06:43,168 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:06:43,168 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4911 [2020-10-27 01:06:43,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:06:43,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:43,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 45 [2020-10-27 01:06:43,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:43,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:43,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:43,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:43,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:43,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:43,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:43,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:43,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:43,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:43,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:43,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:43,393 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:43,412 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 01:06:43,413 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [578343462] [2020-10-27 01:06:43,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:43,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 01:06:43,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437345012] [2020-10-27 01:06:43,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-27 01:06:43,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:43,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-27 01:06:43,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-27 01:06:43,414 INFO L87 Difference]: Start difference. First operand 414 states and 490 transitions. Second operand 9 states. [2020-10-27 01:06:43,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:43,938 INFO L93 Difference]: Finished difference Result 541 states and 656 transitions. [2020-10-27 01:06:43,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 01:06:43,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-27 01:06:43,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:43,941 INFO L225 Difference]: With dead ends: 541 [2020-10-27 01:06:43,941 INFO L226 Difference]: Without dead ends: 498 [2020-10-27 01:06:43,941 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:43,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2020-10-27 01:06:43,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 479. [2020-10-27 01:06:43,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 479 states. [2020-10-27 01:06:43,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 584 transitions. [2020-10-27 01:06:43,991 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 584 transitions. Word has length 55 [2020-10-27 01:06:43,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:43,991 INFO L481 AbstractCegarLoop]: Abstraction has 479 states and 584 transitions. [2020-10-27 01:06:43,991 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-27 01:06:43,991 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 584 transitions. [2020-10-27 01:06:43,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:06:43,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:43,993 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:43,993 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-27 01:06:43,993 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:43,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:43,993 INFO L82 PathProgramCache]: Analyzing trace with hash -877116251, now seen corresponding path program 2 times [2020-10-27 01:06:43,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:43,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [605368390] [2020-10-27 01:06:43,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:44,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:44,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,262 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:44,850 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:44,850 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:06:44,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 01:06:44,851 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 840 [2020-10-27 01:06:44,851 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:44,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:44,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:44,851 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-27 01:06:44,851 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:45,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:45,344 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:45,344 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:45,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:45,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:45,345 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:45,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:45,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:45,366 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 01:06:45,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [605368390] [2020-10-27 01:06:45,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:45,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:45,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933911531] [2020-10-27 01:06:45,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:45,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:45,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:45,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:45,368 INFO L87 Difference]: Start difference. First operand 479 states and 584 transitions. Second operand 11 states. [2020-10-27 01:06:46,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:46,771 INFO L93 Difference]: Finished difference Result 779 states and 973 transitions. [2020-10-27 01:06:46,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:06:46,773 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 01:06:46,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:46,776 INFO L225 Difference]: With dead ends: 779 [2020-10-27 01:06:46,776 INFO L226 Difference]: Without dead ends: 699 [2020-10-27 01:06:46,777 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2020-10-27 01:06:46,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 699 states. [2020-10-27 01:06:46,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 699 to 542. [2020-10-27 01:06:46,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 542 states. [2020-10-27 01:06:46,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 542 states to 542 states and 653 transitions. [2020-10-27 01:06:46,834 INFO L78 Accepts]: Start accepts. Automaton has 542 states and 653 transitions. Word has length 56 [2020-10-27 01:06:46,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:46,834 INFO L481 AbstractCegarLoop]: Abstraction has 542 states and 653 transitions. [2020-10-27 01:06:46,834 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 542 states and 653 transitions. [2020-10-27 01:06:46,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-27 01:06:46,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:46,836 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:46,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-27 01:06:46,836 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:46,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash 1366867047, now seen corresponding path program 1 times [2020-10-27 01:06:46,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:46,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1553682682] [2020-10-27 01:06:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:46,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:46,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,874 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:46,988 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,368 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:47,816 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:47,816 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-27 01:06:47,816 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:06:47,816 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 967 [2020-10-27 01:06:47,817 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:47,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:47,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:47,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-27 01:06:47,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:48,223 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 51 [2020-10-27 01:06:48,445 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:48,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:48,448 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:48,450 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:48,450 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:48,450 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:48,451 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:48,451 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:48,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:48,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:48,451 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:48,451 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:48,481 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 01:06:48,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1553682682] [2020-10-27 01:06:48,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:48,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:48,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015133109] [2020-10-27 01:06:48,482 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:48,482 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:48,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:48,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:48,483 INFO L87 Difference]: Start difference. First operand 542 states and 653 transitions. Second operand 11 states. [2020-10-27 01:06:48,849 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-27 01:06:49,104 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 50 [2020-10-27 01:06:50,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:50,203 INFO L93 Difference]: Finished difference Result 784 states and 960 transitions. [2020-10-27 01:06:50,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:06:50,204 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 56 [2020-10-27 01:06:50,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:50,207 INFO L225 Difference]: With dead ends: 784 [2020-10-27 01:06:50,207 INFO L226 Difference]: Without dead ends: 704 [2020-10-27 01:06:50,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=76, Invalid=304, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:06:50,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2020-10-27 01:06:50,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 585. [2020-10-27 01:06:50,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 585 states. [2020-10-27 01:06:50,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 585 states to 585 states and 698 transitions. [2020-10-27 01:06:50,270 INFO L78 Accepts]: Start accepts. Automaton has 585 states and 698 transitions. Word has length 56 [2020-10-27 01:06:50,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:50,270 INFO L481 AbstractCegarLoop]: Abstraction has 585 states and 698 transitions. [2020-10-27 01:06:50,270 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:06:50,270 INFO L276 IsEmpty]: Start isEmpty. Operand 585 states and 698 transitions. [2020-10-27 01:06:50,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-27 01:06:50,271 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:50,272 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:50,272 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-27 01:06:50,272 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:50,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:50,272 INFO L82 PathProgramCache]: Analyzing trace with hash -316182789, now seen corresponding path program 2 times [2020-10-27 01:06:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:50,273 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1855470825] [2020-10-27 01:06:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:50,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:50,329 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:50,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:50,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:51,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:52,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:52,640 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-27 01:06:52,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:52,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2335 [2020-10-27 01:06:52,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:06:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:52,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:06:52,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:52,967 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 47 [2020-10-27 01:06:53,083 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2020-10-27 01:06:53,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:53,366 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:53,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:53,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:53,368 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:53,368 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:53,368 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:53,369 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:53,369 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:53,400 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 01:06:53,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1855470825] [2020-10-27 01:06:53,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:53,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:06:53,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005295558] [2020-10-27 01:06:53,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:06:53,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:53,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:06:53,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:06:53,401 INFO L87 Difference]: Start difference. First operand 585 states and 698 transitions. Second operand 12 states. [2020-10-27 01:06:53,709 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 48 [2020-10-27 01:06:54,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:54,935 INFO L93 Difference]: Finished difference Result 820 states and 992 transitions. [2020-10-27 01:06:54,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:06:54,936 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 59 [2020-10-27 01:06:54,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:54,939 INFO L225 Difference]: With dead ends: 820 [2020-10-27 01:06:54,939 INFO L226 Difference]: Without dead ends: 816 [2020-10-27 01:06:54,940 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:06:54,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2020-10-27 01:06:55,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 654. [2020-10-27 01:06:55,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 654 states. [2020-10-27 01:06:55,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 654 states to 654 states and 773 transitions. [2020-10-27 01:06:55,007 INFO L78 Accepts]: Start accepts. Automaton has 654 states and 773 transitions. Word has length 59 [2020-10-27 01:06:55,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:55,008 INFO L481 AbstractCegarLoop]: Abstraction has 654 states and 773 transitions. [2020-10-27 01:06:55,008 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:06:55,008 INFO L276 IsEmpty]: Start isEmpty. Operand 654 states and 773 transitions. [2020-10-27 01:06:55,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:06:55,009 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:55,009 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:06:55,009 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-27 01:06:55,010 INFO L429 AbstractCegarLoop]: === Iteration 41 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:55,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:55,010 INFO L82 PathProgramCache]: Analyzing trace with hash 287733443, now seen corresponding path program 2 times [2020-10-27 01:06:55,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:55,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2090775588] [2020-10-27 01:06:55,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:55,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,130 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:55,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,157 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:56,157 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:06:56,157 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:06:56,157 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1132 [2020-10-27 01:06:56,157 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 01:06:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:56,158 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-27 01:06:56,158 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:56,503 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:56,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:56,508 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:56,508 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:56,508 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:56,508 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:06:56,509 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:56,509 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:56,509 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:56,527 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:06:56,527 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2090775588] [2020-10-27 01:06:56,528 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:56,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:06:56,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1458869251] [2020-10-27 01:06:56,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:06:56,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:56,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:06:56,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:06:56,529 INFO L87 Difference]: Start difference. First operand 654 states and 773 transitions. Second operand 10 states. [2020-10-27 01:06:57,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:06:57,388 INFO L93 Difference]: Finished difference Result 709 states and 837 transitions. [2020-10-27 01:06:57,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-27 01:06:57,389 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 60 [2020-10-27 01:06:57,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:06:57,392 INFO L225 Difference]: With dead ends: 709 [2020-10-27 01:06:57,392 INFO L226 Difference]: Without dead ends: 620 [2020-10-27 01:06:57,392 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-27 01:06:57,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 620 states. [2020-10-27 01:06:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 620 to 606. [2020-10-27 01:06:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 606 states. [2020-10-27 01:06:57,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 701 transitions. [2020-10-27 01:06:57,444 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 701 transitions. Word has length 60 [2020-10-27 01:06:57,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:06:57,445 INFO L481 AbstractCegarLoop]: Abstraction has 606 states and 701 transitions. [2020-10-27 01:06:57,445 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:06:57,445 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 701 transitions. [2020-10-27 01:06:57,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-27 01:06:57,446 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:06:57,447 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:06:57,447 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-27 01:06:57,447 INFO L429 AbstractCegarLoop]: === Iteration 42 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:06:57,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:06:57,447 INFO L82 PathProgramCache]: Analyzing trace with hash 123709319, now seen corresponding path program 1 times [2020-10-27 01:06:57,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:06:57,448 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [679864546] [2020-10-27 01:06:57,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:06:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:57,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,666 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:57,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:59,089 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:59,090 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-27 01:06:59,090 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:06:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1629 [2020-10-27 01:06:59,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:06:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:06:59,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-27 01:06:59,090 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:59,483 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:06:59,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:06:59,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:06:59,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:06:59,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:06:59,488 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:06:59,488 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:06:59,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:06:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:06:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:06:59,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:06:59,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:06:59,515 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 01:06:59,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [679864546] [2020-10-27 01:06:59,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:06:59,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:06:59,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234118938] [2020-10-27 01:06:59,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:06:59,516 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:06:59,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:06:59,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:06:59,516 INFO L87 Difference]: Start difference. First operand 606 states and 701 transitions. Second operand 11 states. [2020-10-27 01:07:00,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:00,795 INFO L93 Difference]: Finished difference Result 649 states and 751 transitions. [2020-10-27 01:07:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:07:00,795 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 60 [2020-10-27 01:07:00,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:00,798 INFO L225 Difference]: With dead ends: 649 [2020-10-27 01:07:00,798 INFO L226 Difference]: Without dead ends: 633 [2020-10-27 01:07:00,799 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:00,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2020-10-27 01:07:00,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 605. [2020-10-27 01:07:00,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 605 states. [2020-10-27 01:07:00,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 695 transitions. [2020-10-27 01:07:00,862 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 695 transitions. Word has length 60 [2020-10-27 01:07:00,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:00,862 INFO L481 AbstractCegarLoop]: Abstraction has 605 states and 695 transitions. [2020-10-27 01:07:00,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:07:00,863 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 695 transitions. [2020-10-27 01:07:00,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:07:00,864 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:00,864 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:00,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-27 01:07:00,864 INFO L429 AbstractCegarLoop]: === Iteration 43 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:00,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:00,865 INFO L82 PathProgramCache]: Analyzing trace with hash 1672264833, now seen corresponding path program 2 times [2020-10-27 01:07:00,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:00,865 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798392303] [2020-10-27 01:07:00,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:00,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:00,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,899 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:00,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:01,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:03,031 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:03,031 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:07:03,031 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:07:03,031 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2153 [2020-10-27 01:07:03,031 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:03,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:03,031 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:03,032 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 53 [2020-10-27 01:07:03,032 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:03,373 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 34 [2020-10-27 01:07:03,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:03,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:03,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:03,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:03,674 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:03,674 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:03,674 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:03,674 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:03,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:03,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:03,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:03,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798392303] [2020-10-27 01:07:03,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:03,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:03,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194955457] [2020-10-27 01:07:03,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:03,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:03,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:03,704 INFO L87 Difference]: Start difference. First operand 605 states and 695 transitions. Second operand 12 states. [2020-10-27 01:07:04,080 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 52 [2020-10-27 01:07:05,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:05,695 INFO L93 Difference]: Finished difference Result 948 states and 1143 transitions. [2020-10-27 01:07:05,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-27 01:07:05,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-27 01:07:05,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:05,698 INFO L225 Difference]: With dead ends: 948 [2020-10-27 01:07:05,699 INFO L226 Difference]: Without dead ends: 869 [2020-10-27 01:07:05,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:07:05,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2020-10-27 01:07:05,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 706. [2020-10-27 01:07:05,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 706 states. [2020-10-27 01:07:05,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 706 states to 706 states and 820 transitions. [2020-10-27 01:07:05,786 INFO L78 Accepts]: Start accepts. Automaton has 706 states and 820 transitions. Word has length 61 [2020-10-27 01:07:05,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:05,789 INFO L481 AbstractCegarLoop]: Abstraction has 706 states and 820 transitions. [2020-10-27 01:07:05,789 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:05,789 INFO L276 IsEmpty]: Start isEmpty. Operand 706 states and 820 transitions. [2020-10-27 01:07:05,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 01:07:05,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:05,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 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, 1, 1, 1, 1, 1] [2020-10-27 01:07:05,791 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-27 01:07:05,791 INFO L429 AbstractCegarLoop]: === Iteration 44 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash -250963201, now seen corresponding path program 3 times [2020-10-27 01:07:05,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:05,792 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [421531987] [2020-10-27 01:07:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:05,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:05,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,864 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:05,960 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,150 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:06,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:09,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:09,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-27 01:07:09,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:07:09,193 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3388 [2020-10-27 01:07:09,193 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:09,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 51 [2020-10-27 01:07:09,194 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:09,450 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:09,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:09,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:09,455 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:09,455 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:09,455 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:09,455 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:09,455 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:09,455 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:09,456 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:09,478 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:09,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [421531987] [2020-10-27 01:07:09,478 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:09,478 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:09,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472882657] [2020-10-27 01:07:09,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:09,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:09,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:09,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:09,479 INFO L87 Difference]: Start difference. First operand 706 states and 820 transitions. Second operand 12 states. [2020-10-27 01:07:11,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:11,233 INFO L93 Difference]: Finished difference Result 1044 states and 1270 transitions. [2020-10-27 01:07:11,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:07:11,233 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-27 01:07:11,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:11,236 INFO L225 Difference]: With dead ends: 1044 [2020-10-27 01:07:11,237 INFO L226 Difference]: Without dead ends: 895 [2020-10-27 01:07:11,237 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:07:11,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 895 states. [2020-10-27 01:07:11,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 895 to 770. [2020-10-27 01:07:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 770 states. [2020-10-27 01:07:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 908 transitions. [2020-10-27 01:07:11,310 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 908 transitions. Word has length 61 [2020-10-27 01:07:11,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:11,310 INFO L481 AbstractCegarLoop]: Abstraction has 770 states and 908 transitions. [2020-10-27 01:07:11,310 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:11,310 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 908 transitions. [2020-10-27 01:07:11,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-27 01:07:11,312 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:11,312 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:11,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-27 01:07:11,312 INFO L429 AbstractCegarLoop]: === Iteration 45 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:11,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:11,313 INFO L82 PathProgramCache]: Analyzing trace with hash -789937129, now seen corresponding path program 2 times [2020-10-27 01:07:11,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:11,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676125320] [2020-10-27 01:07:11,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:11,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:11,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:11,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:12,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:13,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:13,419 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-27 01:07:13,419 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:07:13,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2076 [2020-10-27 01:07:13,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:13,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:13,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:13,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-27 01:07:13,419 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:13,737 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 47 [2020-10-27 01:07:14,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:14,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:14,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:14,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:14,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:14,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:14,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:14,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:14,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:14,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:14,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:14,113 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 01:07:14,114 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676125320] [2020-10-27 01:07:14,114 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:14,114 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:14,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933995313] [2020-10-27 01:07:14,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:14,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:14,115 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:14,115 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:14,115 INFO L87 Difference]: Start difference. First operand 770 states and 908 transitions. Second operand 12 states. [2020-10-27 01:07:14,649 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-27 01:07:15,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:15,823 INFO L93 Difference]: Finished difference Result 963 states and 1157 transitions. [2020-10-27 01:07:15,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 01:07:15,824 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 62 [2020-10-27 01:07:15,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:15,828 INFO L225 Difference]: With dead ends: 963 [2020-10-27 01:07:15,828 INFO L226 Difference]: Without dead ends: 959 [2020-10-27 01:07:15,828 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2020-10-27 01:07:15,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2020-10-27 01:07:15,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 800. [2020-10-27 01:07:15,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 800 states. [2020-10-27 01:07:15,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 940 transitions. [2020-10-27 01:07:15,914 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 940 transitions. Word has length 62 [2020-10-27 01:07:15,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:15,914 INFO L481 AbstractCegarLoop]: Abstraction has 800 states and 940 transitions. [2020-10-27 01:07:15,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:15,914 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 940 transitions. [2020-10-27 01:07:15,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-10-27 01:07:15,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:15,916 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:07:15,916 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-27 01:07:15,916 INFO L429 AbstractCegarLoop]: === Iteration 46 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:15,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:15,917 INFO L82 PathProgramCache]: Analyzing trace with hash 2048800399, now seen corresponding path program 1 times [2020-10-27 01:07:15,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:15,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750523834] [2020-10-27 01:07:15,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:15,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:15,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:16,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:16,159 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:16,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:16,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:20,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:20,933 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 01:07:20,933 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:07:20,933 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-27 01:07:20,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:07:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:20,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:07:20,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:21,304 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:21,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:21,308 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:21,309 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:21,309 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:21,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:21,310 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:21,310 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:21,310 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:21,310 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:07:21,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750523834] [2020-10-27 01:07:21,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:21,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:07:21,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767084290] [2020-10-27 01:07:21,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:07:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:21,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:07:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:07:21,335 INFO L87 Difference]: Start difference. First operand 800 states and 940 transitions. Second operand 10 states. [2020-10-27 01:07:22,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:22,537 INFO L93 Difference]: Finished difference Result 832 states and 975 transitions. [2020-10-27 01:07:22,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:22,538 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 63 [2020-10-27 01:07:22,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:22,541 INFO L225 Difference]: With dead ends: 832 [2020-10-27 01:07:22,541 INFO L226 Difference]: Without dead ends: 828 [2020-10-27 01:07:22,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:22,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2020-10-27 01:07:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 806. [2020-10-27 01:07:22,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-10-27 01:07:22,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 946 transitions. [2020-10-27 01:07:22,630 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 946 transitions. Word has length 63 [2020-10-27 01:07:22,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:22,630 INFO L481 AbstractCegarLoop]: Abstraction has 806 states and 946 transitions. [2020-10-27 01:07:22,631 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:07:22,631 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 946 transitions. [2020-10-27 01:07:22,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2020-10-27 01:07:22,632 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:22,632 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:22,632 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-27 01:07:22,633 INFO L429 AbstractCegarLoop]: === Iteration 47 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:22,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:22,633 INFO L82 PathProgramCache]: Analyzing trace with hash 388995487, now seen corresponding path program 1 times [2020-10-27 01:07:22,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:22,633 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [918150444] [2020-10-27 01:07:22,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:22,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:22,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,703 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:22,986 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:23,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:24,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:24,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 01:07:24,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:07:24,734 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2088 [2020-10-27 01:07:24,734 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:24,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:07:24,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:24,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-27 01:07:24,735 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:25,210 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:25,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:25,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:25,215 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:25,215 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:25,215 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:25,215 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:25,215 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:25,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:25,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:25,216 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:25,216 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:25,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:25,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [918150444] [2020-10-27 01:07:25,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:25,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:07:25,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108274535] [2020-10-27 01:07:25,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:07:25,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:25,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:07:25,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:07:25,261 INFO L87 Difference]: Start difference. First operand 806 states and 946 transitions. Second operand 13 states. [2020-10-27 01:07:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:27,592 INFO L93 Difference]: Finished difference Result 1010 states and 1207 transitions. [2020-10-27 01:07:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:07:27,593 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 64 [2020-10-27 01:07:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:27,596 INFO L225 Difference]: With dead ends: 1010 [2020-10-27 01:07:27,596 INFO L226 Difference]: Without dead ends: 1006 [2020-10-27 01:07:27,597 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=115, Invalid=535, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:07:27,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2020-10-27 01:07:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 812. [2020-10-27 01:07:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 812 states. [2020-10-27 01:07:27,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 812 states to 812 states and 952 transitions. [2020-10-27 01:07:27,656 INFO L78 Accepts]: Start accepts. Automaton has 812 states and 952 transitions. Word has length 64 [2020-10-27 01:07:27,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:27,656 INFO L481 AbstractCegarLoop]: Abstraction has 812 states and 952 transitions. [2020-10-27 01:07:27,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:07:27,656 INFO L276 IsEmpty]: Start isEmpty. Operand 812 states and 952 transitions. [2020-10-27 01:07:27,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:07:27,658 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:27,658 INFO L422 BasicCegarLoop]: trace histogram [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, 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 01:07:27,658 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-27 01:07:27,658 INFO L429 AbstractCegarLoop]: === Iteration 48 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:27,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:27,659 INFO L82 PathProgramCache]: Analyzing trace with hash -786578709, now seen corresponding path program 1 times [2020-10-27 01:07:27,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:27,659 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252928931] [2020-10-27 01:07:27,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:27,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:27,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:27,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:27,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:27,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:28,310 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:31,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:32,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:32,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:07:32,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:07:32,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-27 01:07:32,683 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:07:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:32,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:07:32,684 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:32,982 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:32,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:32,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:32,987 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:32,987 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:32,987 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:32,987 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:32,987 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:32,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:32,988 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:32,988 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:33,015 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:07:33,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252928931] [2020-10-27 01:07:33,015 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:33,015 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:07:33,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189649018] [2020-10-27 01:07:33,016 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:07:33,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:33,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:07:33,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:07:33,016 INFO L87 Difference]: Start difference. First operand 812 states and 952 transitions. Second operand 10 states. [2020-10-27 01:07:33,841 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 46 [2020-10-27 01:07:34,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:34,837 INFO L93 Difference]: Finished difference Result 861 states and 1007 transitions. [2020-10-27 01:07:34,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:07:34,837 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-27 01:07:34,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:34,842 INFO L225 Difference]: With dead ends: 861 [2020-10-27 01:07:34,842 INFO L226 Difference]: Without dead ends: 857 [2020-10-27 01:07:34,843 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:07:34,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 857 states. [2020-10-27 01:07:34,898 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 857 to 806. [2020-10-27 01:07:34,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 806 states. [2020-10-27 01:07:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 806 states to 806 states and 945 transitions. [2020-10-27 01:07:34,900 INFO L78 Accepts]: Start accepts. Automaton has 806 states and 945 transitions. Word has length 66 [2020-10-27 01:07:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:34,900 INFO L481 AbstractCegarLoop]: Abstraction has 806 states and 945 transitions. [2020-10-27 01:07:34,900 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:07:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 806 states and 945 transitions. [2020-10-27 01:07:34,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:07:34,902 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:34,902 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:34,902 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2020-10-27 01:07:34,902 INFO L429 AbstractCegarLoop]: === Iteration 49 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:34,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:34,903 INFO L82 PathProgramCache]: Analyzing trace with hash -1376371479, now seen corresponding path program 4 times [2020-10-27 01:07:34,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:34,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1003368648] [2020-10-27 01:07:34,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:34,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:34,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:34,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:35,207 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:35,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:35,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:36,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:38,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:38,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:07:38,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:07:38,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3722 [2020-10-27 01:07:38,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:38,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-27 01:07:38,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:38,943 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:38,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:38,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:38,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:38,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:38,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:38,949 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:38,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:38,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:38,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:38,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:38,993 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 3 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:38,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1003368648] [2020-10-27 01:07:38,993 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:38,993 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:38,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314251024] [2020-10-27 01:07:38,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:38,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:38,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:38,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:38,996 INFO L87 Difference]: Start difference. First operand 806 states and 945 transitions. Second operand 12 states. [2020-10-27 01:07:40,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:40,796 INFO L93 Difference]: Finished difference Result 968 states and 1146 transitions. [2020-10-27 01:07:40,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-27 01:07:40,797 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 66 [2020-10-27 01:07:40,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:40,799 INFO L225 Difference]: With dead ends: 968 [2020-10-27 01:07:40,799 INFO L226 Difference]: Without dead ends: 819 [2020-10-27 01:07:40,800 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2020-10-27 01:07:40,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 819 states. [2020-10-27 01:07:40,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 819 to 766. [2020-10-27 01:07:40,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 766 states. [2020-10-27 01:07:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 766 states to 766 states and 881 transitions. [2020-10-27 01:07:40,855 INFO L78 Accepts]: Start accepts. Automaton has 766 states and 881 transitions. Word has length 66 [2020-10-27 01:07:40,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:40,855 INFO L481 AbstractCegarLoop]: Abstraction has 766 states and 881 transitions. [2020-10-27 01:07:40,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:40,855 INFO L276 IsEmpty]: Start isEmpty. Operand 766 states and 881 transitions. [2020-10-27 01:07:40,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2020-10-27 01:07:40,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:40,857 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 01:07:40,857 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2020-10-27 01:07:40,857 INFO L429 AbstractCegarLoop]: === Iteration 50 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:40,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:40,858 INFO L82 PathProgramCache]: Analyzing trace with hash -2080878151, now seen corresponding path program 1 times [2020-10-27 01:07:40,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:40,858 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1622062383] [2020-10-27 01:07:40,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:40,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:40,875 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:40,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:40,974 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,029 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:41,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:42,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:45,871 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:45,872 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 74 [2020-10-27 01:07:45,872 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-27 01:07:45,872 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-27 01:07:45,872 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:07:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:45,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:07:45,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:46,165 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:46,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:46,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:46,171 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:46,171 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:46,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:46,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:07:46,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:46,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:46,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:46,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:46,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:46,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:07:46,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1622062383] [2020-10-27 01:07:46,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:46,198 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:07:46,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804804331] [2020-10-27 01:07:46,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:07:46,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:46,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:07:46,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:07:46,199 INFO L87 Difference]: Start difference. First operand 766 states and 881 transitions. Second operand 10 states. [2020-10-27 01:07:47,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:47,121 INFO L93 Difference]: Finished difference Result 797 states and 914 transitions. [2020-10-27 01:07:47,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-27 01:07:47,122 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 66 [2020-10-27 01:07:47,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:47,124 INFO L225 Difference]: With dead ends: 797 [2020-10-27 01:07:47,124 INFO L226 Difference]: Without dead ends: 759 [2020-10-27 01:07:47,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2020-10-27 01:07:47,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 759 states. [2020-10-27 01:07:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 759 to 741. [2020-10-27 01:07:47,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 741 states. [2020-10-27 01:07:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 741 states to 741 states and 855 transitions. [2020-10-27 01:07:47,180 INFO L78 Accepts]: Start accepts. Automaton has 741 states and 855 transitions. Word has length 66 [2020-10-27 01:07:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:47,180 INFO L481 AbstractCegarLoop]: Abstraction has 741 states and 855 transitions. [2020-10-27 01:07:47,180 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:07:47,181 INFO L276 IsEmpty]: Start isEmpty. Operand 741 states and 855 transitions. [2020-10-27 01:07:47,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:47,182 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:47,182 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:47,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2020-10-27 01:07:47,182 INFO L429 AbstractCegarLoop]: === Iteration 51 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:47,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:47,182 INFO L82 PathProgramCache]: Analyzing trace with hash -1225888226, now seen corresponding path program 3 times [2020-10-27 01:07:47,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:47,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375519684] [2020-10-27 01:07:47,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:47,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:47,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:47,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:47,431 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:47,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:47,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,837 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:48,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:51,598 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:51,598 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:51,598 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:07:51,598 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4401 [2020-10-27 01:07:51,598 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:51,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-27 01:07:51,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:51,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-27 01:07:51,599 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:51,979 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 46 [2020-10-27 01:07:52,108 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 47 [2020-10-27 01:07:52,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:52,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:52,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:52,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:52,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:52,401 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:52,401 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:07:52,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:52,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:52,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:07:52,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375519684] [2020-10-27 01:07:52,439 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:52,439 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-27 01:07:52,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736352581] [2020-10-27 01:07:52,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-27 01:07:52,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:52,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-27 01:07:52,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2020-10-27 01:07:52,440 INFO L87 Difference]: Start difference. First operand 741 states and 855 transitions. Second operand 12 states. [2020-10-27 01:07:52,765 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 49 [2020-10-27 01:07:53,019 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 51 [2020-10-27 01:07:54,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:07:54,360 INFO L93 Difference]: Finished difference Result 991 states and 1172 transitions. [2020-10-27 01:07:54,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-27 01:07:54,361 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 67 [2020-10-27 01:07:54,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:07:54,366 INFO L225 Difference]: With dead ends: 991 [2020-10-27 01:07:54,366 INFO L226 Difference]: Without dead ends: 786 [2020-10-27 01:07:54,368 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-27 01:07:54,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2020-10-27 01:07:54,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 669. [2020-10-27 01:07:54,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 669 states. [2020-10-27 01:07:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 669 states to 669 states and 743 transitions. [2020-10-27 01:07:54,448 INFO L78 Accepts]: Start accepts. Automaton has 669 states and 743 transitions. Word has length 67 [2020-10-27 01:07:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:07:54,449 INFO L481 AbstractCegarLoop]: Abstraction has 669 states and 743 transitions. [2020-10-27 01:07:54,449 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-27 01:07:54,450 INFO L276 IsEmpty]: Start isEmpty. Operand 669 states and 743 transitions. [2020-10-27 01:07:54,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:07:54,451 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:07:54,451 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:07:54,451 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2020-10-27 01:07:54,452 INFO L429 AbstractCegarLoop]: === Iteration 52 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:07:54,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:07:54,452 INFO L82 PathProgramCache]: Analyzing trace with hash -134462935, now seen corresponding path program 1 times [2020-10-27 01:07:54,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:07:54,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [629615167] [2020-10-27 01:07:54,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:07:54,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:54,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:54,997 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:55,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:55,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:56,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,485 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:59,485 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:07:59,485 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-10-27 01:07:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-27 01:07:59,486 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:07:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:07:59,486 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-27 01:07:59,486 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:59,665 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:07:59,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:07:59,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:07:59,670 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:07:59,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:07:59,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:07:59,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:07:59,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:07:59,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:07:59,671 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:07:59,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:07:59,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:07:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-27 01:07:59,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [629615167] [2020-10-27 01:07:59,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:07:59,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:07:59,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519684900] [2020-10-27 01:07:59,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:07:59,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:07:59,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:07:59,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:07:59,705 INFO L87 Difference]: Start difference. First operand 669 states and 743 transitions. Second operand 11 states. [2020-10-27 01:08:01,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:01,031 INFO L93 Difference]: Finished difference Result 842 states and 970 transitions. [2020-10-27 01:08:01,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-27 01:08:01,032 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-27 01:08:01,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:01,036 INFO L225 Difference]: With dead ends: 842 [2020-10-27 01:08:01,036 INFO L226 Difference]: Without dead ends: 809 [2020-10-27 01:08:01,036 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:08:01,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 809 states. [2020-10-27 01:08:01,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 809 to 725. [2020-10-27 01:08:01,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 725 states. [2020-10-27 01:08:01,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 725 states to 725 states and 815 transitions. [2020-10-27 01:08:01,106 INFO L78 Accepts]: Start accepts. Automaton has 725 states and 815 transitions. Word has length 67 [2020-10-27 01:08:01,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:01,106 INFO L481 AbstractCegarLoop]: Abstraction has 725 states and 815 transitions. [2020-10-27 01:08:01,106 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:01,106 INFO L276 IsEmpty]: Start isEmpty. Operand 725 states and 815 transitions. [2020-10-27 01:08:01,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-27 01:08:01,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:01,107 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:01,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2020-10-27 01:08:01,107 INFO L429 AbstractCegarLoop]: === Iteration 53 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:01,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:01,108 INFO L82 PathProgramCache]: Analyzing trace with hash 491038451, now seen corresponding path program 1 times [2020-10-27 01:08:01,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:01,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1666678045] [2020-10-27 01:08:01,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:01,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:01,121 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:01,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:03,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:03,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 01:08:03,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:08:03,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2430 [2020-10-27 01:08:03,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:03,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 01:08:03,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:03,969 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:03,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:03,972 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:03,975 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:03,975 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:03,976 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:03,976 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:03,976 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:03,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:03,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:03,976 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:03,976 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:04,005 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:04,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1666678045] [2020-10-27 01:08:04,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:04,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:04,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121318231] [2020-10-27 01:08:04,006 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:04,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:04,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:04,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:04,007 INFO L87 Difference]: Start difference. First operand 725 states and 815 transitions. Second operand 13 states. [2020-10-27 01:08:05,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:05,961 INFO L93 Difference]: Finished difference Result 889 states and 1030 transitions. [2020-10-27 01:08:05,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:05,961 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 67 [2020-10-27 01:08:05,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:05,964 INFO L225 Difference]: With dead ends: 889 [2020-10-27 01:08:05,965 INFO L226 Difference]: Without dead ends: 885 [2020-10-27 01:08:05,967 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2020-10-27 01:08:05,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 885 states. [2020-10-27 01:08:06,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 885 to 731. [2020-10-27 01:08:06,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 731 states. [2020-10-27 01:08:06,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 731 states to 731 states and 821 transitions. [2020-10-27 01:08:06,025 INFO L78 Accepts]: Start accepts. Automaton has 731 states and 821 transitions. Word has length 67 [2020-10-27 01:08:06,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:06,025 INFO L481 AbstractCegarLoop]: Abstraction has 731 states and 821 transitions. [2020-10-27 01:08:06,025 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:06,025 INFO L276 IsEmpty]: Start isEmpty. Operand 731 states and 821 transitions. [2020-10-27 01:08:06,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-10-27 01:08:06,026 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:06,027 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 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, 1, 1, 1] [2020-10-27 01:08:06,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2020-10-27 01:08:06,027 INFO L429 AbstractCegarLoop]: === Iteration 54 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:06,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:06,027 INFO L82 PathProgramCache]: Analyzing trace with hash -1683717298, now seen corresponding path program 3 times [2020-10-27 01:08:06,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:06,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1981894356] [2020-10-27 01:08:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:06,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:06,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:06,519 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:07,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:07,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 01:08:07,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:08:07,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1880 [2020-10-27 01:08:07,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:07,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-27 01:08:07,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:08,194 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-27 01:08:08,330 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2020-10-27 01:08:08,490 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 41 [2020-10-27 01:08:08,660 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-27 01:08:08,871 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 39 [2020-10-27 01:08:09,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:09,131 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:09,133 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:09,133 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:09,133 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:09,133 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:09,133 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:09,134 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:09,134 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:09,172 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1981894356] [2020-10-27 01:08:09,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:09,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:09,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128718925] [2020-10-27 01:08:09,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:09,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:09,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:09,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:09,173 INFO L87 Difference]: Start difference. First operand 731 states and 821 transitions. Second operand 14 states. [2020-10-27 01:08:09,610 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 48 [2020-10-27 01:08:09,910 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 47 [2020-10-27 01:08:10,211 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 40 [2020-10-27 01:08:10,596 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 48 [2020-10-27 01:08:11,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:11,744 INFO L93 Difference]: Finished difference Result 970 states and 1120 transitions. [2020-10-27 01:08:11,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:08:11,745 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 68 [2020-10-27 01:08:11,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:11,748 INFO L225 Difference]: With dead ends: 970 [2020-10-27 01:08:11,748 INFO L226 Difference]: Without dead ends: 837 [2020-10-27 01:08:11,749 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2020-10-27 01:08:11,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 837 states. [2020-10-27 01:08:11,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 837 to 683. [2020-10-27 01:08:11,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 683 states. [2020-10-27 01:08:11,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 751 transitions. [2020-10-27 01:08:11,823 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 751 transitions. Word has length 68 [2020-10-27 01:08:11,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:11,823 INFO L481 AbstractCegarLoop]: Abstraction has 683 states and 751 transitions. [2020-10-27 01:08:11,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:11,823 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 751 transitions. [2020-10-27 01:08:11,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-27 01:08:11,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:11,824 INFO L422 BasicCegarLoop]: trace histogram [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, 1, 1, 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 01:08:11,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2020-10-27 01:08:11,825 INFO L429 AbstractCegarLoop]: === Iteration 55 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:11,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:11,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1738074147, now seen corresponding path program 1 times [2020-10-27 01:08:11,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:11,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1886466239] [2020-10-27 01:08:11,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:11,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:11,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:11,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:11,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:12,139 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:12,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:12,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:12,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:15,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:15,776 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 01:08:15,776 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:08:15,776 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3936 [2020-10-27 01:08:15,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:15,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:08:15,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:15,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 61 [2020-10-27 01:08:15,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:16,098 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:16,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:16,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:16,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:16,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:16,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:16,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:16,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:16,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:16,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:16,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-27 01:08:16,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1886466239] [2020-10-27 01:08:16,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:16,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:08:16,180 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1141283174] [2020-10-27 01:08:16,180 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:08:16,180 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:16,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:08:16,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:08:16,181 INFO L87 Difference]: Start difference. First operand 683 states and 751 transitions. Second operand 10 states. [2020-10-27 01:08:17,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:17,132 INFO L93 Difference]: Finished difference Result 707 states and 777 transitions. [2020-10-27 01:08:17,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:08:17,133 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-27 01:08:17,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:17,136 INFO L225 Difference]: With dead ends: 707 [2020-10-27 01:08:17,136 INFO L226 Difference]: Without dead ends: 663 [2020-10-27 01:08:17,137 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-27 01:08:17,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2020-10-27 01:08:17,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 644. [2020-10-27 01:08:17,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-10-27 01:08:17,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 710 transitions. [2020-10-27 01:08:17,187 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 710 transitions. Word has length 69 [2020-10-27 01:08:17,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:17,187 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 710 transitions. [2020-10-27 01:08:17,187 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:08:17,187 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 710 transitions. [2020-10-27 01:08:17,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-27 01:08:17,188 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:17,188 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:17,188 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2020-10-27 01:08:17,188 INFO L429 AbstractCegarLoop]: === Iteration 56 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:17,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:17,189 INFO L82 PathProgramCache]: Analyzing trace with hash 558528436, now seen corresponding path program 3 times [2020-10-27 01:08:17,189 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:17,189 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750067006] [2020-10-27 01:08:17,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:17,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:17,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:17,579 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:18,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:19,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:20,825 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:20,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 01:08:20,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:08:20,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3604 [2020-10-27 01:08:20,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:20,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:20,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:08:20,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 01:08:21,353 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:21,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:21,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:21,357 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:21,357 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:21,357 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:21,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:21,358 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:21,358 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:21,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:21,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750067006] [2020-10-27 01:08:21,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:21,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:08:21,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [958049574] [2020-10-27 01:08:21,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:08:21,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:21,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:08:21,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:08:21,400 INFO L87 Difference]: Start difference. First operand 644 states and 710 transitions. Second operand 15 states. [2020-10-27 01:08:22,138 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 54 [2020-10-27 01:08:23,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:23,024 INFO L93 Difference]: Finished difference Result 791 states and 888 transitions. [2020-10-27 01:08:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 01:08:23,025 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 71 [2020-10-27 01:08:23,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:23,028 INFO L225 Difference]: With dead ends: 791 [2020-10-27 01:08:23,028 INFO L226 Difference]: Without dead ends: 787 [2020-10-27 01:08:23,028 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2020-10-27 01:08:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 787 states. [2020-10-27 01:08:23,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 787 to 644. [2020-10-27 01:08:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 644 states. [2020-10-27 01:08:23,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 644 states to 644 states and 708 transitions. [2020-10-27 01:08:23,079 INFO L78 Accepts]: Start accepts. Automaton has 644 states and 708 transitions. Word has length 71 [2020-10-27 01:08:23,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:23,079 INFO L481 AbstractCegarLoop]: Abstraction has 644 states and 708 transitions. [2020-10-27 01:08:23,079 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:08:23,079 INFO L276 IsEmpty]: Start isEmpty. Operand 644 states and 708 transitions. [2020-10-27 01:08:23,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-27 01:08:23,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:23,080 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:23,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2020-10-27 01:08:23,080 INFO L429 AbstractCegarLoop]: === Iteration 57 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:23,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:23,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1895582526, now seen corresponding path program 1 times [2020-10-27 01:08:23,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:23,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885348576] [2020-10-27 01:08:23,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:23,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:23,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:23,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:26,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:26,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 01:08:26,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-27 01:08:26,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2967 [2020-10-27 01:08:26,061 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-27 01:08:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:26,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 01:08:26,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:26,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:26,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:26,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:26,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:26,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:26,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:26,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-27 01:08:26,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:26,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:26,442 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:26,474 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:26,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885348576] [2020-10-27 01:08:26,475 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:26,475 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-27 01:08:26,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027878907] [2020-10-27 01:08:26,475 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-27 01:08:26,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:26,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-27 01:08:26,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2020-10-27 01:08:26,476 INFO L87 Difference]: Start difference. First operand 644 states and 708 transitions. Second operand 13 states. [2020-10-27 01:08:28,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:28,466 INFO L93 Difference]: Finished difference Result 854 states and 980 transitions. [2020-10-27 01:08:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:28,466 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 72 [2020-10-27 01:08:28,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:28,469 INFO L225 Difference]: With dead ends: 854 [2020-10-27 01:08:28,470 INFO L226 Difference]: Without dead ends: 775 [2020-10-27 01:08:28,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:08:28,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 775 states. [2020-10-27 01:08:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 775 to 650. [2020-10-27 01:08:28,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 650 states. [2020-10-27 01:08:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 650 states to 650 states and 714 transitions. [2020-10-27 01:08:28,522 INFO L78 Accepts]: Start accepts. Automaton has 650 states and 714 transitions. Word has length 72 [2020-10-27 01:08:28,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:28,522 INFO L481 AbstractCegarLoop]: Abstraction has 650 states and 714 transitions. [2020-10-27 01:08:28,522 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-27 01:08:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 650 states and 714 transitions. [2020-10-27 01:08:28,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:08:28,523 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:28,524 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:28,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2020-10-27 01:08:28,524 INFO L429 AbstractCegarLoop]: === Iteration 58 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:28,524 INFO L82 PathProgramCache]: Analyzing trace with hash 639380986, now seen corresponding path program 4 times [2020-10-27 01:08:28,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:28,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1877372461] [2020-10-27 01:08:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:28,537 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:28,548 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:28,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:28,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:29,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:29,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:30,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:30,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:08:30,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-27 01:08:30,757 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2223 [2020-10-27 01:08:30,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-27 01:08:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:30,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 65 [2020-10-27 01:08:30,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:31,098 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2020-10-27 01:08:31,242 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2020-10-27 01:08:31,388 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 57 [2020-10-27 01:08:31,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:31,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:31,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:31,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:31,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:31,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:31,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:31,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:31,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:31,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:31,604 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:31,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1877372461] [2020-10-27 01:08:31,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:31,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:31,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379540177] [2020-10-27 01:08:31,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:31,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:31,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:31,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:31,606 INFO L87 Difference]: Start difference. First operand 650 states and 714 transitions. Second operand 14 states. [2020-10-27 01:08:32,854 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 61 [2020-10-27 01:08:34,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:34,032 INFO L93 Difference]: Finished difference Result 1092 states and 1260 transitions. [2020-10-27 01:08:34,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-27 01:08:34,033 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-27 01:08:34,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:34,036 INFO L225 Difference]: With dead ends: 1092 [2020-10-27 01:08:34,036 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 01:08:34,037 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:08:34,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 01:08:34,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 802. [2020-10-27 01:08:34,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 802 states. [2020-10-27 01:08:34,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 802 states to 802 states and 878 transitions. [2020-10-27 01:08:34,127 INFO L78 Accepts]: Start accepts. Automaton has 802 states and 878 transitions. Word has length 73 [2020-10-27 01:08:34,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:34,127 INFO L481 AbstractCegarLoop]: Abstraction has 802 states and 878 transitions. [2020-10-27 01:08:34,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:34,127 INFO L276 IsEmpty]: Start isEmpty. Operand 802 states and 878 transitions. [2020-10-27 01:08:34,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-27 01:08:34,128 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:34,128 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:34,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2020-10-27 01:08:34,129 INFO L429 AbstractCegarLoop]: === Iteration 59 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:34,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:34,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1810219144, now seen corresponding path program 5 times [2020-10-27 01:08:34,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:34,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [730378023] [2020-10-27 01:08:34,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:34,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:34,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,167 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,181 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:34,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:37,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:37,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-27 01:08:37,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-27 01:08:37,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2915 [2020-10-27 01:08:37,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-27 01:08:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:37,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 63 [2020-10-27 01:08:37,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:37,411 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 01:08:37,545 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-27 01:08:38,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:38,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:38,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:38,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:38,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:38,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:38,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:08:38,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:38,049 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:38,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:38,102 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:08:38,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [730378023] [2020-10-27 01:08:38,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:38,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-27 01:08:38,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755365866] [2020-10-27 01:08:38,104 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-27 01:08:38,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:38,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-27 01:08:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:38,104 INFO L87 Difference]: Start difference. First operand 802 states and 878 transitions. Second operand 14 states. [2020-10-27 01:08:38,867 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 64 [2020-10-27 01:08:40,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:40,835 INFO L93 Difference]: Finished difference Result 1136 states and 1283 transitions. [2020-10-27 01:08:40,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-27 01:08:40,836 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 73 [2020-10-27 01:08:40,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:40,839 INFO L225 Difference]: With dead ends: 1136 [2020-10-27 01:08:40,839 INFO L226 Difference]: Without dead ends: 1057 [2020-10-27 01:08:40,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=96, Invalid=554, Unknown=0, NotChecked=0, Total=650 [2020-10-27 01:08:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2020-10-27 01:08:40,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 948. [2020-10-27 01:08:40,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 948 states. [2020-10-27 01:08:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 948 states to 948 states and 1036 transitions. [2020-10-27 01:08:40,947 INFO L78 Accepts]: Start accepts. Automaton has 948 states and 1036 transitions. Word has length 73 [2020-10-27 01:08:40,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:40,947 INFO L481 AbstractCegarLoop]: Abstraction has 948 states and 1036 transitions. [2020-10-27 01:08:40,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-27 01:08:40,947 INFO L276 IsEmpty]: Start isEmpty. Operand 948 states and 1036 transitions. [2020-10-27 01:08:40,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2020-10-27 01:08:40,949 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:40,949 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:40,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2020-10-27 01:08:40,949 INFO L429 AbstractCegarLoop]: === Iteration 60 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:40,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:40,950 INFO L82 PathProgramCache]: Analyzing trace with hash -835430154, now seen corresponding path program 1 times [2020-10-27 01:08:40,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:40,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [272613108] [2020-10-27 01:08:40,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:40,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:41,001 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:41,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:41,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:41,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:45,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:45,988 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 82 [2020-10-27 01:08:45,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 01:08:45,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-27 01:08:45,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-27 01:08:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:45,989 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 01:08:45,989 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:46,396 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:46,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:46,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:46,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:46,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:46,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:46,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-27 01:08:46,401 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:46,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:46,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:46,401 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:46,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:46,435 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-27 01:08:46,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [272613108] [2020-10-27 01:08:46,436 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:46,436 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 01:08:46,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14542812] [2020-10-27 01:08:46,436 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 01:08:46,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:46,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 01:08:46,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-27 01:08:46,437 INFO L87 Difference]: Start difference. First operand 948 states and 1036 transitions. Second operand 10 states. [2020-10-27 01:08:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:47,558 INFO L93 Difference]: Finished difference Result 975 states and 1065 transitions. [2020-10-27 01:08:47,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 01:08:47,560 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 74 [2020-10-27 01:08:47,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:47,564 INFO L225 Difference]: With dead ends: 975 [2020-10-27 01:08:47,564 INFO L226 Difference]: Without dead ends: 971 [2020-10-27 01:08:47,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2020-10-27 01:08:47,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 971 states. [2020-10-27 01:08:47,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 971 to 954. [2020-10-27 01:08:47,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 954 states. [2020-10-27 01:08:47,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 954 states to 954 states and 1041 transitions. [2020-10-27 01:08:47,663 INFO L78 Accepts]: Start accepts. Automaton has 954 states and 1041 transitions. Word has length 74 [2020-10-27 01:08:47,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:47,664 INFO L481 AbstractCegarLoop]: Abstraction has 954 states and 1041 transitions. [2020-10-27 01:08:47,664 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 01:08:47,664 INFO L276 IsEmpty]: Start isEmpty. Operand 954 states and 1041 transitions. [2020-10-27 01:08:47,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-27 01:08:47,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:47,666 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:08:47,666 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2020-10-27 01:08:47,666 INFO L429 AbstractCegarLoop]: === Iteration 61 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:47,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:47,667 INFO L82 PathProgramCache]: Analyzing trace with hash -1209663487, now seen corresponding path program 1 times [2020-10-27 01:08:47,667 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:47,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151603396] [2020-10-27 01:08:47,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:47,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:47,685 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:47,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,305 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:48,775 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:49,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:50,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:51,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:51,148 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:51,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:52,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:52,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-27 01:08:52,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 16 [2020-10-27 01:08:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-27 01:08:52,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-27 01:08:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:52,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-27 01:08:52,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:53,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:08:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:53,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:53,011 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:53,011 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:08:53,011 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:08:53,011 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-27 01:08:53,011 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:53,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:08:53,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:08:53,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:08:53,012 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:08:53,046 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-27 01:08:53,046 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151603396] [2020-10-27 01:08:53,046 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:08:53,047 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-27 01:08:53,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224976870] [2020-10-27 01:08:53,047 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-27 01:08:53,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:08:53,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-27 01:08:53,047 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2020-10-27 01:08:53,047 INFO L87 Difference]: Start difference. First operand 954 states and 1041 transitions. Second operand 11 states. [2020-10-27 01:08:55,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:08:55,316 INFO L93 Difference]: Finished difference Result 1016 states and 1112 transitions. [2020-10-27 01:08:55,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-27 01:08:55,317 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-27 01:08:55,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:08:55,321 INFO L225 Difference]: With dead ends: 1016 [2020-10-27 01:08:55,322 INFO L226 Difference]: Without dead ends: 999 [2020-10-27 01:08:55,322 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2020-10-27 01:08:55,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2020-10-27 01:08:55,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 982. [2020-10-27 01:08:55,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 982 states. [2020-10-27 01:08:55,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 982 states to 982 states and 1074 transitions. [2020-10-27 01:08:55,435 INFO L78 Accepts]: Start accepts. Automaton has 982 states and 1074 transitions. Word has length 75 [2020-10-27 01:08:55,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:08:55,435 INFO L481 AbstractCegarLoop]: Abstraction has 982 states and 1074 transitions. [2020-10-27 01:08:55,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-27 01:08:55,435 INFO L276 IsEmpty]: Start isEmpty. Operand 982 states and 1074 transitions. [2020-10-27 01:08:55,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2020-10-27 01:08:55,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:08:55,436 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 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 01:08:55,436 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2020-10-27 01:08:55,436 INFO L429 AbstractCegarLoop]: === Iteration 62 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:08:55,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:08:55,437 INFO L82 PathProgramCache]: Analyzing trace with hash -1107981946, now seen corresponding path program 2 times [2020-10-27 01:08:55,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:08:55,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [822345076] [2020-10-27 01:08:55,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:08:55,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:08:55,452 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:55,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:55,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:56,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:57,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4356 [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-27 01:08:59,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:00,341 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 57 [2020-10-27 01:09:00,472 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-27 01:09:01,054 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 01:09:01,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:01,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:01,061 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 01:09:01,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 01:09:01,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 01:09:01,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-27 01:09:01,063 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 01:09:01,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 01:09:01,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 01:09:01,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 01:09:01,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 01:09:01,158 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 01:09:01,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [822345076] [2020-10-27 01:09:01,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 01:09:01,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-27 01:09:01,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56933697] [2020-10-27 01:09:01,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-27 01:09:01,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 01:09:01,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-27 01:09:01,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2020-10-27 01:09:01,160 INFO L87 Difference]: Start difference. First operand 982 states and 1074 transitions. Second operand 15 states. [2020-10-27 01:09:02,159 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 61 [2020-10-27 01:09:02,508 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2020-10-27 01:09:03,350 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 51 [2020-10-27 01:09:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 01:09:04,543 INFO L93 Difference]: Finished difference Result 1160 states and 1305 transitions. [2020-10-27 01:09:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-27 01:09:04,544 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 76 [2020-10-27 01:09:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 01:09:04,548 INFO L225 Difference]: With dead ends: 1160 [2020-10-27 01:09:04,548 INFO L226 Difference]: Without dead ends: 1156 [2020-10-27 01:09:04,549 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2020-10-27 01:09:04,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1156 states. [2020-10-27 01:09:04,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1156 to 988. [2020-10-27 01:09:04,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 988 states. [2020-10-27 01:09:04,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 988 states to 988 states and 1080 transitions. [2020-10-27 01:09:04,668 INFO L78 Accepts]: Start accepts. Automaton has 988 states and 1080 transitions. Word has length 76 [2020-10-27 01:09:04,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 01:09:04,668 INFO L481 AbstractCegarLoop]: Abstraction has 988 states and 1080 transitions. [2020-10-27 01:09:04,668 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-27 01:09:04,668 INFO L276 IsEmpty]: Start isEmpty. Operand 988 states and 1080 transitions. [2020-10-27 01:09:04,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-27 01:09:04,670 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 01:09:04,670 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 01:09:04,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2020-10-27 01:09:04,670 INFO L429 AbstractCegarLoop]: === Iteration 63 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 01:09:04,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 01:09:04,670 INFO L82 PathProgramCache]: Analyzing trace with hash -645544698, now seen corresponding path program 2 times [2020-10-27 01:09:04,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 01:09:04,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [627436631] [2020-10-27 01:09:04,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 01:09:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 01:09:04,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:04,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:04,850 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 01:09:05,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking...