/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=WIDESTAMONGSMALL --traceabstraction.additional.smt.options tolerance=0.6 --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-fpi/sina5.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:19:22,932 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:19:22,935 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:19:22,974 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:19:22,975 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:19:22,976 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:19:22,978 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:19:22,981 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:19:22,983 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:19:22,985 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:19:22,986 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:19:22,988 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:19:22,989 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:19:22,991 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:19:22,996 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:19:22,998 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:19:23,000 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:19:23,024 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:19:23,027 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:19:23,033 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:19:23,038 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:19:23,044 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:19:23,046 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:19:23,048 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:19:23,054 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:19:23,058 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:19:23,059 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:19:23,060 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:19:23,061 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:19:23,063 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:19:23,064 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:19:23,065 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:19:23,068 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:19:23,069 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:19:23,074 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:19:23,075 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:19:23,077 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:19:23,078 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:19:23,078 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:19:23,080 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:19:23,081 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:19:23,083 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-28 09:19:23,154 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:19:23,155 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:19:23,160 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:19:23,160 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:19:23,161 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:19:23,161 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:19:23,162 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:19:23,162 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:19:23,162 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:19:23,162 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:19:23,163 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:19:23,164 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:19:23,164 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:19:23,164 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:19:23,164 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:19:23,165 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:19:23,165 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:19:23,165 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:19:23,166 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:19:23,166 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:19:23,166 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:19:23,166 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:19:23,167 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:19:23,167 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:19:23,167 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:19:23,167 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:19:23,167 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:19:23,168 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:19:23,168 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:19:23,168 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:19:23,633 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:19:23,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:19:23,683 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:19:23,685 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:19:23,686 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:19:23,687 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-fpi/sina5.c [2020-10-28 09:19:23,780 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e0720c24/ea6d4dec35cb4302b62cecf530fcfbc5/FLAG36f53b372 [2020-10-28 09:19:24,439 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:19:24,440 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-fpi/sina5.c [2020-10-28 09:19:24,449 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e0720c24/ea6d4dec35cb4302b62cecf530fcfbc5/FLAG36f53b372 [2020-10-28 09:19:24,795 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/7e0720c24/ea6d4dec35cb4302b62cecf530fcfbc5 [2020-10-28 09:19:24,801 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:19:24,811 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:19:24,815 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:19:24,816 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:19:24,820 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:19:24,821 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:24" (1/1) ... [2020-10-28 09:19:24,826 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@119d8062 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:24, skipping insertion in model container [2020-10-28 09:19:24,826 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:19:24" (1/1) ... [2020-10-28 09:19:24,835 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:19:24,858 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:19:25,039 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:19:25,050 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:19:25,077 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:19:25,097 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:19:25,097 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25 WrapperNode [2020-10-28 09:19:25,098 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:19:25,099 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:19:25,099 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:19:25,099 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:19:25,113 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (1/1) ... [2020-10-28 09:19:25,114 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (1/1) ... [2020-10-28 09:19:25,123 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (1/1) ... [2020-10-28 09:19:25,124 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (1/1) ... [2020-10-28 09:19:25,139 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (1/1) ... [2020-10-28 09:19:25,155 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (1/1) ... [2020-10-28 09:19:25,157 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (1/1) ... [2020-10-28 09:19:25,160 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:19:25,161 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:19:25,161 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:19:25,162 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:19:25,163 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:19:25,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:19:25,240 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:19:25,241 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:19:25,241 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-28 09:19:25,241 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:19:25,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:19:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:19:25,241 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:19:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:19:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:19:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-28 09:19:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:19:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-28 09:19:25,242 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-28 09:19:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:19:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-28 09:19:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:19:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:19:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:19:25,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:19:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:19:25,244 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:19:25,832 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:19:25,833 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-28 09:19:25,838 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:25 BoogieIcfgContainer [2020-10-28 09:19:25,838 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:19:25,842 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:19:25,842 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:19:25,847 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:19:25,847 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:19:24" (1/3) ... [2020-10-28 09:19:25,849 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b69b9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:25, skipping insertion in model container [2020-10-28 09:19:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:19:25" (2/3) ... [2020-10-28 09:19:25,850 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b69b9fe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:19:25, skipping insertion in model container [2020-10-28 09:19:25,850 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:19:25" (3/3) ... [2020-10-28 09:19:25,854 INFO L111 eAbstractionObserver]: Analyzing ICFG sina5.c [2020-10-28 09:19:25,867 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:19:25,873 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:19:25,887 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:19:25,930 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:19:25,931 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:19:25,931 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:19:25,931 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:19:25,931 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:19:25,931 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:19:25,932 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:19:25,932 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:19:25,960 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states. [2020-10-28 09:19:25,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:19:25,972 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:25,974 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] [2020-10-28 09:19:25,974 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:25,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:25,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1841305657, now seen corresponding path program 1 times [2020-10-28 09:19:25,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:25,997 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89896183] [2020-10-28 09:19:25,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:26,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:26,297 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:26,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,504 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:27,542 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:29,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 09:19:29,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:19:29,184 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2958 [2020-10-28 09:19:29,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:29,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:19:29,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:29,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-28 09:19:29,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:29,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,335 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:29,335 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:29,335 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:29,336 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-28 09:19:29,336 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:29,336 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:29,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:29,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:29,336 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:29,337 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:29,342 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:29,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:29,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:29,348 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:29,348 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-28 09:19:29,348 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:29,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:29,349 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:29,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:29,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:29,349 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:29,349 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:29,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:29,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89896183] [2020-10-28 09:19:29,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:19:29,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:19:29,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094059210] [2020-10-28 09:19:29,365 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:19:29,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:29,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:19:29,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:19:29,382 INFO L87 Difference]: Start difference. First operand 47 states. Second operand 3 states. [2020-10-28 09:19:29,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:29,520 INFO L93 Difference]: Finished difference Result 81 states and 109 transitions. [2020-10-28 09:19:29,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:19:29,522 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 29 [2020-10-28 09:19:29,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:29,530 INFO L225 Difference]: With dead ends: 81 [2020-10-28 09:19:29,530 INFO L226 Difference]: Without dead ends: 39 [2020-10-28 09:19:29,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:19:29,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-28 09:19:29,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2020-10-28 09:19:29,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2020-10-28 09:19:29,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 44 transitions. [2020-10-28 09:19:29,578 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 44 transitions. Word has length 29 [2020-10-28 09:19:29,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:29,579 INFO L481 AbstractCegarLoop]: Abstraction has 39 states and 44 transitions. [2020-10-28 09:19:29,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:19:29,579 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 44 transitions. [2020-10-28 09:19:29,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-28 09:19:29,580 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:29,580 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] [2020-10-28 09:19:29,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:19:29,581 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:29,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:29,582 INFO L82 PathProgramCache]: Analyzing trace with hash -230914229, now seen corresponding path program 1 times [2020-10-28 09:19:29,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:29,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449562981] [2020-10-28 09:19:29,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:29,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:29,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,660 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,686 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,738 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:29,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:31,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:33,931 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:33,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 09:19:33,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-28 09:19:33,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4329 [2020-10-28 09:19:33,933 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:33,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:19:33,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-28 09:19:33,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:19:33,934 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:34,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:34,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:34,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,041 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:34,042 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:34,043 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:34,043 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 9 [2020-10-28 09:19:34,043 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:34,044 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:34,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:34,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:34,044 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:34,045 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:34,049 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:34,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:34,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:34,066 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:34,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:19:34,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:34,066 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:34,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:19:34,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:34,067 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:19:34,067 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:34,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:34,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449562981] [2020-10-28 09:19:34,079 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:19:34,079 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-28 09:19:34,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173469666] [2020-10-28 09:19:34,081 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:19:34,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:34,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:19:34,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:19:34,083 INFO L87 Difference]: Start difference. First operand 39 states and 44 transitions. Second operand 5 states. [2020-10-28 09:19:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:34,303 INFO L93 Difference]: Finished difference Result 69 states and 83 transitions. [2020-10-28 09:19:34,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:19:34,304 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-10-28 09:19:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:34,305 INFO L225 Difference]: With dead ends: 69 [2020-10-28 09:19:34,305 INFO L226 Difference]: Without dead ends: 45 [2020-10-28 09:19:34,306 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:19:34,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-10-28 09:19:34,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2020-10-28 09:19:34,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-28 09:19:34,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 49 transitions. [2020-10-28 09:19:34,318 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 49 transitions. Word has length 29 [2020-10-28 09:19:34,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:34,318 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 49 transitions. [2020-10-28 09:19:34,318 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:19:34,318 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 49 transitions. [2020-10-28 09:19:34,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-28 09:19:34,320 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:34,320 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] [2020-10-28 09:19:34,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:19:34,320 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:34,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:34,321 INFO L82 PathProgramCache]: Analyzing trace with hash 143959605, now seen corresponding path program 1 times [2020-10-28 09:19:34,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:34,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130383008] [2020-10-28 09:19:34,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:34,397 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:34,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:35,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:35,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:36,521 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:36,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:37,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:38,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:39,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:39,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:39,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-28 09:19:39,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 12 [2020-10-28 09:19:39,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:19:39,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:39,384 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:19:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:39,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:19:39,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:40,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:40,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:40,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:40,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:40,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:19:40,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:40,407 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:40,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:40,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:19:40,412 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:40,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:40,414 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:40,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:40,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:40,416 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:40,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:19:40,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:40,417 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:40,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:40,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:40,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:40,418 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:40,437 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:19:40,438 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130383008] [2020-10-28 09:19:40,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:40,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:19:40,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886217953] [2020-10-28 09:19:40,439 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:19:40,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:40,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:19:40,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:19:40,441 INFO L87 Difference]: Start difference. First operand 44 states and 49 transitions. Second operand 19 states. [2020-10-28 09:19:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:41,702 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-28 09:19:41,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:19:41,703 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 39 [2020-10-28 09:19:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:41,706 INFO L225 Difference]: With dead ends: 72 [2020-10-28 09:19:41,706 INFO L226 Difference]: Without dead ends: 69 [2020-10-28 09:19:41,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:19:41,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-28 09:19:41,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 61. [2020-10-28 09:19:41,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-28 09:19:41,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-28 09:19:41,724 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 39 [2020-10-28 09:19:41,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:41,725 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-28 09:19:41,725 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:19:41,725 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-28 09:19:41,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-28 09:19:41,727 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:41,727 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] [2020-10-28 09:19:41,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:19:41,727 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:41,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:41,728 INFO L82 PathProgramCache]: Analyzing trace with hash -973128041, now seen corresponding path program 2 times [2020-10-28 09:19:41,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:41,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1454397161] [2020-10-28 09:19:41,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:41,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:41,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:41,826 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:46,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:46,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 09:19:46,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:19:46,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:19:46,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:46,755 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:46,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:19:46,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:46,833 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:46,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:46,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:46,842 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:46,842 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:46,842 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:46,842 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:46,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:46,843 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:46,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:46,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:46,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:46,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:46,846 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:46,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:46,856 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:46,856 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:46,856 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:46,856 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:46,856 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:46,857 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:46,857 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:46,857 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:46,866 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-28 09:19:46,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1454397161] [2020-10-28 09:19:46,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:46,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:19:46,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396239892] [2020-10-28 09:19:46,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:19:46,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:46,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:19:46,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:46,870 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 8 states. [2020-10-28 09:19:47,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:47,222 INFO L93 Difference]: Finished difference Result 150 states and 174 transitions. [2020-10-28 09:19:47,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:19:47,223 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 41 [2020-10-28 09:19:47,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:47,225 INFO L225 Difference]: With dead ends: 150 [2020-10-28 09:19:47,225 INFO L226 Difference]: Without dead ends: 79 [2020-10-28 09:19:47,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:19:47,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-28 09:19:47,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-10-28 09:19:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-28 09:19:47,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 70 transitions. [2020-10-28 09:19:47,239 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 70 transitions. Word has length 41 [2020-10-28 09:19:47,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:47,239 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 70 transitions. [2020-10-28 09:19:47,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:19:47,240 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 70 transitions. [2020-10-28 09:19:47,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2020-10-28 09:19:47,241 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:47,241 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] [2020-10-28 09:19:47,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:19:47,241 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:47,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:47,242 INFO L82 PathProgramCache]: Analyzing trace with hash -145935461, now seen corresponding path program 3 times [2020-10-28 09:19:47,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:47,243 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545992836] [2020-10-28 09:19:47,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:47,272 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:47,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:48,255 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-28 09:19:52,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:19:52,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:19:52,277 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,277 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:19:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:52,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:19:52,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:52,363 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:19:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,367 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,371 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:19:52,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:52,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:19:52,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,372 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:52,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:52,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:52,376 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:19:52,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:52,379 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:52,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:19:52,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:19:52,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:19:52,380 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:52,380 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:19:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:19:52,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:19:52,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:52,386 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-28 09:19:52,387 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545992836] [2020-10-28 09:19:52,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:19:52,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:19:52,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830036439] [2020-10-28 09:19:52,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:19:52,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:19:52,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:19:52,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:19:52,389 INFO L87 Difference]: Start difference. First operand 63 states and 70 transitions. Second operand 8 states. [2020-10-28 09:19:52,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:19:52,713 INFO L93 Difference]: Finished difference Result 71 states and 78 transitions. [2020-10-28 09:19:52,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:19:52,713 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 45 [2020-10-28 09:19:52,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:19:52,714 INFO L225 Difference]: With dead ends: 71 [2020-10-28 09:19:52,714 INFO L226 Difference]: Without dead ends: 59 [2020-10-28 09:19:52,715 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:19:52,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-28 09:19:52,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2020-10-28 09:19:52,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:19:52,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 59 transitions. [2020-10-28 09:19:52,737 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 59 transitions. Word has length 45 [2020-10-28 09:19:52,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:19:52,737 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 59 transitions. [2020-10-28 09:19:52,737 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:19:52,737 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 59 transitions. [2020-10-28 09:19:52,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:19:52,741 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:19:52,741 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:19:52,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:19:52,741 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:19:52,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:19:52,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1529342111, now seen corresponding path program 4 times [2020-10-28 09:19:52,742 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:19:52,742 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1951155705] [2020-10-28 09:19:52,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:19:52,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:19:52,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:53,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:54,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:55,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:56,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:19:57,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:19:57,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 61 [2020-10-28 09:19:57,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:19:57,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-28 09:19:57,792 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:19:57,792 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:19:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:19:57,792 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:19:57,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:19:57,793 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:19:59,045 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 52 [2020-10-28 09:19:59,210 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 54 [2020-10-28 09:19:59,367 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 52 [2020-10-28 09:19:59,664 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 43 [2020-10-28 09:20:00,666 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:00,673 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:00,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:00,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:00,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:20:00,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:00,677 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:00,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:00,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:00,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:00,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:00,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:00,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:00,684 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:00,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:00,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:00,685 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:00,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:00,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:00,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:00,686 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:00,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:00,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1951155705] [2020-10-28 09:20:00,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:00,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:20:00,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081179511] [2020-10-28 09:20:00,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:20:00,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:00,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:20:00,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:20:00,728 INFO L87 Difference]: Start difference. First operand 54 states and 59 transitions. Second operand 30 states. [2020-10-28 09:20:02,554 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 58 [2020-10-28 09:20:02,754 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 60 [2020-10-28 09:20:04,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:04,308 INFO L93 Difference]: Finished difference Result 92 states and 102 transitions. [2020-10-28 09:20:04,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:20:04,310 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 49 [2020-10-28 09:20:04,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:04,312 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:20:04,312 INFO L226 Difference]: Without dead ends: 89 [2020-10-28 09:20:04,315 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 580 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=251, Invalid=2505, Unknown=0, NotChecked=0, Total=2756 [2020-10-28 09:20:04,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-28 09:20:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 81. [2020-10-28 09:20:04,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-28 09:20:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 90 transitions. [2020-10-28 09:20:04,336 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 90 transitions. Word has length 49 [2020-10-28 09:20:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:04,337 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 90 transitions. [2020-10-28 09:20:04,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:20:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 90 transitions. [2020-10-28 09:20:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-28 09:20:04,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:04,339 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:04,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:20:04,339 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:04,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:04,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1060401535, now seen corresponding path program 5 times [2020-10-28 09:20:04,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:04,340 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [604679096] [2020-10-28 09:20:04,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:04,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,404 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:04,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:09,373 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-28 09:20:09,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:20:09,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:20:09,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:09,373 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:09,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:20:09,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:09,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:20:09,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:09,461 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:09,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:09,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,469 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:09,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:09,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:09,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:09,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:09,470 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:09,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:09,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:09,472 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:09,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:09,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:09,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:09,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:09,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:09,475 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:09,475 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:09,475 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:09,475 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:09,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:09,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:09,481 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-28 09:20:09,481 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [604679096] [2020-10-28 09:20:09,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:09,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:20:09,482 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089579772] [2020-10-28 09:20:09,483 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:20:09,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:09,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:20:09,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:20:09,484 INFO L87 Difference]: Start difference. First operand 81 states and 90 transitions. Second operand 10 states. [2020-10-28 09:20:09,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:09,984 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2020-10-28 09:20:09,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:20:09,984 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 51 [2020-10-28 09:20:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:09,990 INFO L225 Difference]: With dead ends: 173 [2020-10-28 09:20:09,991 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:20:09,992 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:20:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:20:10,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 118. [2020-10-28 09:20:10,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-28 09:20:10,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 129 transitions. [2020-10-28 09:20:10,015 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 129 transitions. Word has length 51 [2020-10-28 09:20:10,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:10,015 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 129 transitions. [2020-10-28 09:20:10,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:20:10,015 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 129 transitions. [2020-10-28 09:20:10,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-10-28 09:20:10,017 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:10,017 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:10,017 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:20:10,017 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:10,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:10,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2078587427, now seen corresponding path program 6 times [2020-10-28 09:20:10,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:10,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1535660313] [2020-10-28 09:20:10,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:10,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:10,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:10,168 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:13,144 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,035 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,035 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:20:15,035 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:20:15,035 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:20:15,036 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,036 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:20:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:15,036 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:20:15,036 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,137 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:15,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:15,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,145 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,146 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:15,146 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:15,146 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:15,146 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,146 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:15,146 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:15,147 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:15,147 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:15,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:15,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:15,151 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:15,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:15,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:15,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:15,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:15,152 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:15,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:15,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:15,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:15,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:15,157 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2020-10-28 09:20:15,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1535660313] [2020-10-28 09:20:15,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:15,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:20:15,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741446828] [2020-10-28 09:20:15,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:20:15,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:20:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:20:15,160 INFO L87 Difference]: Start difference. First operand 118 states and 129 transitions. Second operand 10 states. [2020-10-28 09:20:15,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:15,786 INFO L93 Difference]: Finished difference Result 166 states and 177 transitions. [2020-10-28 09:20:15,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:20:15,791 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 53 [2020-10-28 09:20:15,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:15,792 INFO L225 Difference]: With dead ends: 166 [2020-10-28 09:20:15,793 INFO L226 Difference]: Without dead ends: 113 [2020-10-28 09:20:15,794 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:15,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-28 09:20:15,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 101. [2020-10-28 09:20:15,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-28 09:20:15,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 107 transitions. [2020-10-28 09:20:15,811 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 107 transitions. Word has length 53 [2020-10-28 09:20:15,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:15,811 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 107 transitions. [2020-10-28 09:20:15,811 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:20:15,811 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 107 transitions. [2020-10-28 09:20:15,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-28 09:20:15,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:15,813 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:20:15,813 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:20:15,813 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:15,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:15,814 INFO L82 PathProgramCache]: Analyzing trace with hash -54955255, now seen corresponding path program 1 times [2020-10-28 09:20:15,814 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:15,814 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991753582] [2020-10-28 09:20:15,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:15,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:15,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:16,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:18,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:19,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,227 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:20,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:21,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:21,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:21,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-28 09:20:21,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5485 [2020-10-28 09:20:21,332 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:21,332 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:21,332 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:20:21,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:21,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:20:21,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:22,015 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:22,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:22,019 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:22,022 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:22,022 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:22,022 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:22,022 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:22,022 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:22,023 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:22,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:22,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:22,023 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:22,023 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:22,025 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:22,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:22,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:22,028 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:22,028 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:22,029 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:22,029 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:22,029 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:22,029 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:22,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:22,029 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:22,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:22,030 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:22,031 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2020-10-28 09:20:22,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:22,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:22,039 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:22,039 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:22,040 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:22,040 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:20:22,040 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:22,040 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:20:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:22,040 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:20:22,041 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:22,118 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2020-10-28 09:20:22,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991753582] [2020-10-28 09:20:22,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:22,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:20:22,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520003323] [2020-10-28 09:20:22,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:20:22,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:22,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:20:22,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=372, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:20:22,125 INFO L87 Difference]: Start difference. First operand 101 states and 107 transitions. Second operand 21 states. [2020-10-28 09:20:23,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:23,374 INFO L93 Difference]: Finished difference Result 104 states and 109 transitions. [2020-10-28 09:20:23,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:20:23,374 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 57 [2020-10-28 09:20:23,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:23,375 INFO L225 Difference]: With dead ends: 104 [2020-10-28 09:20:23,375 INFO L226 Difference]: Without dead ends: 64 [2020-10-28 09:20:23,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:20:23,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-28 09:20:23,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2020-10-28 09:20:23,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-28 09:20:23,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 69 transitions. [2020-10-28 09:20:23,386 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 69 transitions. Word has length 57 [2020-10-28 09:20:23,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:23,386 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 69 transitions. [2020-10-28 09:20:23,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:20:23,387 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 69 transitions. [2020-10-28 09:20:23,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-28 09:20:23,390 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:23,391 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:23,391 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:20:23,391 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:23,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:23,392 INFO L82 PathProgramCache]: Analyzing trace with hash 1261956745, now seen corresponding path program 7 times [2020-10-28 09:20:23,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:23,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427497466] [2020-10-28 09:20:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:23,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:23,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:24,285 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:25,412 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:26,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:27,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:28,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:28,751 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:20:28,751 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:20:28,751 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5325 [2020-10-28 09:20:28,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:28,751 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:28,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-28 09:20:28,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:28,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-28 09:20:28,752 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:29,719 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 56 [2020-10-28 09:20:29,893 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-28 09:20:30,240 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 63 [2020-10-28 09:20:30,449 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 64 [2020-10-28 09:20:30,701 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-28 09:20:30,914 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 70 [2020-10-28 09:20:31,181 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-28 09:20:31,398 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 62 [2020-10-28 09:20:31,633 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 61 [2020-10-28 09:20:31,845 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2020-10-28 09:20:32,129 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 64 [2020-10-28 09:20:32,371 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 57 [2020-10-28 09:20:32,646 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 60 [2020-10-28 09:20:32,869 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-28 09:20:33,089 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 49 [2020-10-28 09:20:33,476 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 46 [2020-10-28 09:20:33,952 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-28 09:20:34,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:34,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:34,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:34,698 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:34,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:34,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:34,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:34,698 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:34,699 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:34,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:34,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:34,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:34,699 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:34,702 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:34,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:34,704 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:34,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:34,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:34,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:34,705 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:34,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:34,705 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:34,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:34,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:34,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:34,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:34,772 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 2 proven. 43 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:20:34,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427497466] [2020-10-28 09:20:34,773 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:34,773 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-28 09:20:34,773 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522197218] [2020-10-28 09:20:34,774 INFO L461 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-28 09:20:34,774 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:34,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-28 09:20:34,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=1417, Unknown=0, NotChecked=0, Total=1560 [2020-10-28 09:20:34,776 INFO L87 Difference]: Start difference. First operand 64 states and 69 transitions. Second operand 40 states. [2020-10-28 09:20:36,279 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 55 [2020-10-28 09:20:36,819 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 48 [2020-10-28 09:20:37,053 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 52 [2020-10-28 09:20:37,323 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 54 [2020-10-28 09:20:37,570 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 58 [2020-10-28 09:20:37,875 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 68 [2020-10-28 09:20:38,082 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-28 09:20:38,307 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 68 [2020-10-28 09:20:38,532 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-28 09:20:38,781 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 68 [2020-10-28 09:20:39,028 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 66 [2020-10-28 09:20:39,282 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 68 [2020-10-28 09:20:39,512 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 63 [2020-10-28 09:20:39,797 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 65 [2020-10-28 09:20:40,283 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 61 [2020-10-28 09:20:40,590 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 55 [2020-10-28 09:20:40,862 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-28 09:20:41,278 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 67 [2020-10-28 09:20:41,543 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-28 09:20:41,760 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 46 [2020-10-28 09:20:43,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:43,787 INFO L93 Difference]: Finished difference Result 102 states and 111 transitions. [2020-10-28 09:20:43,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-10-28 09:20:43,788 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 59 [2020-10-28 09:20:43,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:43,790 INFO L225 Difference]: With dead ends: 102 [2020-10-28 09:20:43,790 INFO L226 Difference]: Without dead ends: 99 [2020-10-28 09:20:43,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=532, Invalid=5630, Unknown=0, NotChecked=0, Total=6162 [2020-10-28 09:20:43,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-28 09:20:43,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 89. [2020-10-28 09:20:43,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-28 09:20:43,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-10-28 09:20:43,814 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 59 [2020-10-28 09:20:43,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:43,815 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-10-28 09:20:43,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-28 09:20:43,815 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-10-28 09:20:43,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:20:43,816 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:43,819 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:43,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:20:43,820 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:43,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:43,820 INFO L82 PathProgramCache]: Analyzing trace with hash -1749153365, now seen corresponding path program 8 times [2020-10-28 09:20:43,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:43,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [964059653] [2020-10-28 09:20:43,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:43,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:43,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:43,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:45,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,857 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:48,857 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-10-28 09:20:48,857 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:20:48,857 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:20:48,857 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:48,858 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:20:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:48,858 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:20:48,858 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:48,970 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:48,975 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:48,978 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:48,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:48,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:20:48,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:48,978 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:48,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:48,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:48,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:48,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:48,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:48,983 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:48,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:48,984 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:48,984 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:48,984 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:48,984 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:48,985 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:48,985 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:48,985 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:48,991 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-28 09:20:48,992 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [964059653] [2020-10-28 09:20:48,992 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:48,992 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:20:48,992 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564895760] [2020-10-28 09:20:48,993 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:20:48,993 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:48,993 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:20:48,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:48,994 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 12 states. [2020-10-28 09:20:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:49,735 INFO L93 Difference]: Finished difference Result 226 states and 254 transitions. [2020-10-28 09:20:49,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:20:49,736 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 61 [2020-10-28 09:20:49,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:49,738 INFO L225 Difference]: With dead ends: 226 [2020-10-28 09:20:49,738 INFO L226 Difference]: Without dead ends: 160 [2020-10-28 09:20:49,740 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:20:49,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2020-10-28 09:20:49,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 136. [2020-10-28 09:20:49,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-28 09:20:49,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2020-10-28 09:20:49,770 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 61 [2020-10-28 09:20:49,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:49,770 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2020-10-28 09:20:49,770 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:20:49,770 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2020-10-28 09:20:49,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-28 09:20:49,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:49,772 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:49,772 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:20:49,773 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:49,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:49,773 INFO L82 PathProgramCache]: Analyzing trace with hash -1474671377, now seen corresponding path program 9 times [2020-10-28 09:20:49,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:49,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [867415316] [2020-10-28 09:20:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:49,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:49,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:49,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:50,046 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:50,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:54,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:54,807 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:20:54,807 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:20:54,807 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-28 09:20:54,807 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:54,807 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:54,807 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:20:54,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:20:54,808 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-28 09:20:54,808 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:54,934 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:20:54,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:54,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:54,942 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:54,942 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:20:54,942 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:54,942 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-28 09:20:54,943 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:54,943 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:54,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:54,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:54,943 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:54,943 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:54,946 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:20:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:54,951 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:54,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:20:54,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:20:54,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:20:54,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:20:54,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:20:54,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:20:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:20:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:20:54,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:20:54,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:20:54,962 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-28 09:20:54,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [867415316] [2020-10-28 09:20:54,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:20:54,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:20:54,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314332652] [2020-10-28 09:20:54,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:20:54,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:20:54,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:20:54,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:20:54,967 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand 12 states. [2020-10-28 09:20:55,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:20:55,812 INFO L93 Difference]: Finished difference Result 198 states and 212 transitions. [2020-10-28 09:20:55,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:20:55,813 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 65 [2020-10-28 09:20:55,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:20:55,814 INFO L225 Difference]: With dead ends: 198 [2020-10-28 09:20:55,814 INFO L226 Difference]: Without dead ends: 141 [2020-10-28 09:20:55,815 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:20:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-28 09:20:55,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 125. [2020-10-28 09:20:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-28 09:20:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 132 transitions. [2020-10-28 09:20:55,834 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 132 transitions. Word has length 65 [2020-10-28 09:20:55,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:20:55,835 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 132 transitions. [2020-10-28 09:20:55,835 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:20:55,835 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 132 transitions. [2020-10-28 09:20:55,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:20:55,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:20:55,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:20:55,836 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:20:55,836 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:20:55,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:20:55,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1182667021, now seen corresponding path program 2 times [2020-10-28 09:20:55,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:20:55,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1619369456] [2020-10-28 09:20:55,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:20:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:20:55,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:56,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:56,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:58,113 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:20:59,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:00,237 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:00,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:00,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:21:00,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:21:00,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-28 09:21:00,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:00,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-28 09:21:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:00,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 09:21:00,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:02,065 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 57 [2020-10-28 09:21:02,480 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 54 [2020-10-28 09:21:02,763 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-28 09:21:02,991 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-28 09:21:03,200 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 56 [2020-10-28 09:21:03,401 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 55 [2020-10-28 09:21:03,752 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 59 [2020-10-28 09:21:03,920 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 52 [2020-10-28 09:21:04,124 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 54 [2020-10-28 09:21:04,475 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 50 [2020-10-28 09:21:04,847 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 49 [2020-10-28 09:21:06,510 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:06,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:06,520 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:06,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:06,522 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:06,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:06,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:06,524 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:06,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:06,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:06,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:06,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:06,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:06,526 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:21:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:06,529 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:06,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:06,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:06,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:06,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:21:06,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:06,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:21:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:06,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:21:06,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:06,580 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 2 proven. 47 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:06,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1619369456] [2020-10-28 09:21:06,580 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:06,580 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-28 09:21:06,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881688237] [2020-10-28 09:21:06,581 INFO L461 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-28 09:21:06,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:06,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-28 09:21:06,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1675, Unknown=0, NotChecked=0, Total=1806 [2020-10-28 09:21:06,582 INFO L87 Difference]: Start difference. First operand 125 states and 132 transitions. Second operand 43 states. [2020-10-28 09:21:07,620 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 62 [2020-10-28 09:21:07,904 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 52 [2020-10-28 09:21:08,178 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-28 09:21:08,658 WARN L193 SmtUtils]: Spent 334.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 88 [2020-10-28 09:21:08,894 WARN L193 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 44 [2020-10-28 09:21:09,245 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 48 [2020-10-28 09:21:09,458 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-28 09:21:10,141 WARN L193 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 88 [2020-10-28 09:21:10,367 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 47 [2020-10-28 09:21:10,624 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 50 [2020-10-28 09:21:10,910 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 143 DAG size of output: 51 [2020-10-28 09:21:11,396 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 55 [2020-10-28 09:21:11,711 WARN L193 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 53 [2020-10-28 09:21:12,050 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 63 [2020-10-28 09:21:12,405 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 54 [2020-10-28 09:21:12,752 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 70 [2020-10-28 09:21:13,156 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 59 [2020-10-28 09:21:13,514 WARN L193 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 73 [2020-10-28 09:21:13,947 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 77 [2020-10-28 09:21:14,450 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 86 [2020-10-28 09:21:14,853 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 63 [2020-10-28 09:21:15,070 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-28 09:21:15,574 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 181 DAG size of output: 76 [2020-10-28 09:21:15,874 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 55 [2020-10-28 09:21:16,358 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 77 [2020-10-28 09:21:16,677 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 65 [2020-10-28 09:21:17,056 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 58 [2020-10-28 09:21:17,540 WARN L193 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 92 [2020-10-28 09:21:18,185 WARN L193 SmtUtils]: Spent 474.00 ms on a formula simplification. DAG size of input: 213 DAG size of output: 86 [2020-10-28 09:21:18,529 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 62 [2020-10-28 09:21:18,881 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 74 [2020-10-28 09:21:19,295 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 91 [2020-10-28 09:21:19,650 WARN L193 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 148 DAG size of output: 60 [2020-10-28 09:21:19,952 WARN L193 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 60 [2020-10-28 09:21:20,207 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 58 [2020-10-28 09:21:20,650 WARN L193 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 191 DAG size of output: 64 [2020-10-28 09:21:20,964 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 67 [2020-10-28 09:21:21,414 WARN L193 SmtUtils]: Spent 303.00 ms on a formula simplification. DAG size of input: 193 DAG size of output: 72 [2020-10-28 09:21:21,674 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 57 [2020-10-28 09:21:22,307 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 106 [2020-10-28 09:21:22,947 WARN L193 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 98 [2020-10-28 09:21:23,586 WARN L193 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 102 [2020-10-28 09:21:24,138 WARN L193 SmtUtils]: Spent 390.00 ms on a formula simplification. DAG size of input: 182 DAG size of output: 100 [2020-10-28 09:21:24,440 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 56 [2020-10-28 09:21:24,741 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 27 [2020-10-28 09:21:25,017 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 57 [2020-10-28 09:21:25,528 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 61 [2020-10-28 09:21:26,046 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 47 [2020-10-28 09:21:26,778 WARN L193 SmtUtils]: Spent 552.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 97 [2020-10-28 09:21:27,372 WARN L193 SmtUtils]: Spent 383.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 79 [2020-10-28 09:21:27,958 WARN L193 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 108 [2020-10-28 09:21:28,888 WARN L193 SmtUtils]: Spent 372.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 93 [2020-10-28 09:21:29,419 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 66 [2020-10-28 09:21:29,949 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 71 [2020-10-28 09:21:30,211 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 132 DAG size of output: 43 [2020-10-28 09:21:30,445 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 50 [2020-10-28 09:21:31,569 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 32 [2020-10-28 09:21:31,888 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 128 DAG size of output: 31 [2020-10-28 09:21:33,112 WARN L193 SmtUtils]: Spent 417.00 ms on a formula simplification. DAG size of input: 168 DAG size of output: 81 [2020-10-28 09:21:34,075 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 164 DAG size of output: 67 [2020-10-28 09:21:34,478 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 66 [2020-10-28 09:21:34,928 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 45 [2020-10-28 09:21:35,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:21:35,123 INFO L93 Difference]: Finished difference Result 194 states and 210 transitions. [2020-10-28 09:21:35,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2020-10-28 09:21:35,124 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 67 [2020-10-28 09:21:35,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:21:35,126 INFO L225 Difference]: With dead ends: 194 [2020-10-28 09:21:35,126 INFO L226 Difference]: Without dead ends: 189 [2020-10-28 09:21:35,133 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4228 ImplicationChecksByTransitivity, 29.6s TimeCoverageRelationStatistics Valid=1619, Invalid=13881, Unknown=0, NotChecked=0, Total=15500 [2020-10-28 09:21:35,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-28 09:21:35,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 127. [2020-10-28 09:21:35,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-28 09:21:35,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 133 transitions. [2020-10-28 09:21:35,150 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 133 transitions. Word has length 67 [2020-10-28 09:21:35,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:21:35,150 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 133 transitions. [2020-10-28 09:21:35,150 INFO L482 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-28 09:21:35,150 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 133 transitions. [2020-10-28 09:21:35,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-28 09:21:35,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:21:35,151 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:21:35,151 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:21:35,151 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:21:35,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:21:35,152 INFO L82 PathProgramCache]: Analyzing trace with hash 2122209267, now seen corresponding path program 10 times [2020-10-28 09:21:35,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:21:35,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731531775] [2020-10-28 09:21:35,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:21:35,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:35,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:36,246 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:38,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:41,227 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:41,227 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-28 09:21:41,227 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-28 09:21:41,227 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6017 [2020-10-28 09:21:41,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:41,228 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:41,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-10-28 09:21:41,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:21:41,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-28 09:21:41,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:41,767 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-28 09:21:42,626 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2020-10-28 09:21:42,781 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-28 09:21:42,934 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-28 09:21:43,128 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 58 [2020-10-28 09:21:43,337 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 63 [2020-10-28 09:21:43,545 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 63 [2020-10-28 09:21:43,734 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 59 [2020-10-28 09:21:44,107 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 72 [2020-10-28 09:21:44,437 WARN L193 SmtUtils]: Spent 245.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 74 [2020-10-28 09:21:44,848 WARN L193 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 79 [2020-10-28 09:21:45,203 WARN L193 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 71 [2020-10-28 09:21:45,518 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 72 [2020-10-28 09:21:45,866 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 67 [2020-10-28 09:21:46,213 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 131 DAG size of output: 68 [2020-10-28 09:21:46,477 WARN L193 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 61 [2020-10-28 09:21:46,736 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 60 [2020-10-28 09:21:46,974 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 53 [2020-10-28 09:21:47,276 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 62 [2020-10-28 09:21:47,549 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 55 [2020-10-28 09:21:47,884 WARN L193 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 124 DAG size of output: 58 [2020-10-28 09:21:48,158 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 50 [2020-10-28 09:21:48,509 WARN L193 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2020-10-28 09:21:48,776 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 44 [2020-10-28 09:21:49,109 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 56 [2020-10-28 09:21:49,605 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 37 [2020-10-28 09:21:49,886 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 34 [2020-10-28 09:21:50,141 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-28 09:21:51,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:21:51,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:51,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:51,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:51,546 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:21:51,546 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:51,546 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:21:51,546 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:51,546 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:51,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:51,547 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:51,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:21:51,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:21:51,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:21:51,552 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:21:51,552 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:21:51,552 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:21:51,552 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:21:51,553 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:21:51,553 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:21:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:21:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:21:51,553 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:21:51,553 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:21:51,616 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-28 09:21:51,617 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731531775] [2020-10-28 09:21:51,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:21:51,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48] total 48 [2020-10-28 09:21:51,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923527292] [2020-10-28 09:21:51,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 48 states [2020-10-28 09:21:51,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:21:51,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2020-10-28 09:21:51,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2078, Unknown=0, NotChecked=0, Total=2256 [2020-10-28 09:21:51,619 INFO L87 Difference]: Start difference. First operand 127 states and 133 transitions. Second operand 48 states. [2020-10-28 09:21:53,317 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 44 [2020-10-28 09:21:53,538 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 47 [2020-10-28 09:21:53,828 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 206 DAG size of output: 35 [2020-10-28 09:21:54,234 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 72 [2020-10-28 09:21:54,729 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 89 [2020-10-28 09:21:55,230 WARN L193 SmtUtils]: Spent 330.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 88 [2020-10-28 09:21:55,695 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 219 DAG size of output: 39 [2020-10-28 09:21:56,088 WARN L193 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 62 [2020-10-28 09:21:56,493 WARN L193 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 218 DAG size of output: 39 [2020-10-28 09:21:56,768 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-28 09:21:57,140 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 79 [2020-10-28 09:21:57,626 WARN L193 SmtUtils]: Spent 375.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 82 [2020-10-28 09:21:57,995 WARN L193 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 203 DAG size of output: 23 [2020-10-28 09:21:58,203 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2020-10-28 09:21:58,526 WARN L193 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 202 DAG size of output: 22 [2020-10-28 09:21:58,779 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 51 [2020-10-28 09:21:59,171 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 62 [2020-10-28 09:21:59,436 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 194 DAG size of output: 20 [2020-10-28 09:21:59,737 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 53 [2020-10-28 09:22:00,045 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 51 [2020-10-28 09:22:00,372 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 205 DAG size of output: 22 [2020-10-28 09:22:00,776 WARN L193 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 61 [2020-10-28 09:22:01,294 WARN L193 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 69 [2020-10-28 09:22:01,644 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 212 DAG size of output: 22 [2020-10-28 09:22:02,186 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 87 [2020-10-28 09:22:02,506 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 211 DAG size of output: 22 [2020-10-28 09:22:03,121 WARN L193 SmtUtils]: Spent 442.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 103 [2020-10-28 09:22:03,678 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 88 [2020-10-28 09:22:04,144 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 76 [2020-10-28 09:22:04,598 WARN L193 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 81 [2020-10-28 09:22:04,967 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 74 [2020-10-28 09:22:05,484 WARN L193 SmtUtils]: Spent 389.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 97 [2020-10-28 09:22:05,840 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 77 [2020-10-28 09:22:06,151 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 70 [2020-10-28 09:22:06,439 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 70 [2020-10-28 09:22:06,706 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 66 [2020-10-28 09:22:06,997 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 66 [2020-10-28 09:22:07,256 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 60 [2020-10-28 09:22:07,731 WARN L193 SmtUtils]: Spent 242.00 ms on a formula simplification that was a NOOP. DAG size: 112 [2020-10-28 09:22:08,618 WARN L193 SmtUtils]: Spent 664.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 126 [2020-10-28 09:22:09,698 WARN L193 SmtUtils]: Spent 648.00 ms on a formula simplification. DAG size of input: 130 DAG size of output: 114 [2020-10-28 09:22:10,003 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 54 [2020-10-28 09:22:10,324 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 63 [2020-10-28 09:22:10,609 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 56 [2020-10-28 09:22:11,005 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 57 [2020-10-28 09:22:11,275 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 51 [2020-10-28 09:22:13,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:13,891 INFO L93 Difference]: Finished difference Result 177 states and 190 transitions. [2020-10-28 09:22:13,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2020-10-28 09:22:13,893 INFO L78 Accepts]: Start accepts. Automaton has 48 states. Word has length 69 [2020-10-28 09:22:13,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:13,895 INFO L225 Difference]: With dead ends: 177 [2020-10-28 09:22:13,895 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 09:22:13,900 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 5 SyntacticMatches, 2 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3521 ImplicationChecksByTransitivity, 27.4s TimeCoverageRelationStatistics Valid=1120, Invalid=11312, Unknown=0, NotChecked=0, Total=12432 [2020-10-28 09:22:13,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 09:22:13,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 156. [2020-10-28 09:22:13,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 09:22:13,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 165 transitions. [2020-10-28 09:22:13,922 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 165 transitions. Word has length 69 [2020-10-28 09:22:13,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:13,922 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 165 transitions. [2020-10-28 09:22:13,922 INFO L482 AbstractCegarLoop]: Interpolant automaton has 48 states. [2020-10-28 09:22:13,922 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 165 transitions. [2020-10-28 09:22:13,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-10-28 09:22:13,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:13,923 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:13,924 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:22:13,924 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:13,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:13,924 INFO L82 PathProgramCache]: Analyzing trace with hash -1860382571, now seen corresponding path program 11 times [2020-10-28 09:22:13,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:13,925 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106063262] [2020-10-28 09:22:13,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:13,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:13,950 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:14,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:16,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:18,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:18,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:22:18,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:22:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-28 09:22:18,951 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:18,951 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:22:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:22:18,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-28 09:22:18,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:19,125 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:19,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:19,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:19,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:19,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:19,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:19,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:19,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:19,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:19,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:19,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:19,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:19,134 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:19,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:19,135 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:19,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:19,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:19,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:19,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:19,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:19,137 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:19,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:19,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:19,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:19,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 89 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-28 09:22:19,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106063262] [2020-10-28 09:22:19,145 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:19,145 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:22:19,145 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235978880] [2020-10-28 09:22:19,146 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:22:19,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:19,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:22:19,146 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:22:19,146 INFO L87 Difference]: Start difference. First operand 156 states and 165 transitions. Second operand 14 states. [2020-10-28 09:22:20,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:20,381 INFO L93 Difference]: Finished difference Result 317 states and 348 transitions. [2020-10-28 09:22:20,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:22:20,383 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 71 [2020-10-28 09:22:20,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:20,386 INFO L225 Difference]: With dead ends: 317 [2020-10-28 09:22:20,386 INFO L226 Difference]: Without dead ends: 241 [2020-10-28 09:22:20,387 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:22:20,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2020-10-28 09:22:20,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 213. [2020-10-28 09:22:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 213 states. [2020-10-28 09:22:20,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 227 transitions. [2020-10-28 09:22:20,426 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 227 transitions. Word has length 71 [2020-10-28 09:22:20,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:20,426 INFO L481 AbstractCegarLoop]: Abstraction has 213 states and 227 transitions. [2020-10-28 09:22:20,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:22:20,427 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 227 transitions. [2020-10-28 09:22:20,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 09:22:20,428 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:20,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-28 09:22:20,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:22:20,428 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:20,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:20,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1574836899, now seen corresponding path program 3 times [2020-10-28 09:22:20,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:20,429 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1657584705] [2020-10-28 09:22:20,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:20,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:20,893 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:21,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:21,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:22,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:25,481 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:25,481 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 09:22:25,481 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:22:25,481 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 09:22:25,481 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:25,481 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:22:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:22:25,482 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 09:22:25,482 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:25,819 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 33 [2020-10-28 09:22:26,769 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2020-10-28 09:22:26,971 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 41 [2020-10-28 09:22:27,131 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 39 [2020-10-28 09:22:28,089 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:28,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:28,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:28,096 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:28,096 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:28,096 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:28,096 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:28,096 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:28,096 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:28,097 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:28,097 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:28,099 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:28,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:28,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:28,100 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:28,101 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:28,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2020-10-28 09:22:28,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:28,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:28,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:28,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:28,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:28,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:22:28,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:28,108 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:22:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:28,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:22:28,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:28,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2020-10-28 09:22:28,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:28,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:28,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:28,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:28,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:28,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-28 09:22:28,119 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:28,119 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:22:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:28,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:22:28,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:28,271 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 9 proven. 38 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2020-10-28 09:22:28,271 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1657584705] [2020-10-28 09:22:28,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:28,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:22:28,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35821755] [2020-10-28 09:22:28,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:22:28,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:28,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:22:28,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:22:28,274 INFO L87 Difference]: Start difference. First operand 213 states and 227 transitions. Second operand 30 states. [2020-10-28 09:22:28,913 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-28 09:22:29,418 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 42 [2020-10-28 09:22:30,330 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2020-10-28 09:22:31,281 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42 [2020-10-28 09:22:31,479 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 41 [2020-10-28 09:22:31,721 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 42 [2020-10-28 09:22:31,978 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 44 [2020-10-28 09:22:32,362 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 44 [2020-10-28 09:22:32,983 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 40 [2020-10-28 09:22:33,202 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 40 [2020-10-28 09:22:33,442 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-28 09:22:33,808 WARN L193 SmtUtils]: Spent 259.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-28 09:22:34,103 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 48 [2020-10-28 09:22:34,404 WARN L193 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-28 09:22:35,585 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 52 [2020-10-28 09:22:35,905 WARN L193 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 65 [2020-10-28 09:22:36,170 WARN L193 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 46 [2020-10-28 09:22:36,395 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-28 09:22:36,733 WARN L193 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2020-10-28 09:22:37,032 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 59 [2020-10-28 09:22:37,329 WARN L193 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 53 [2020-10-28 09:22:37,554 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 50 [2020-10-28 09:22:37,866 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 55 [2020-10-28 09:22:38,287 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2020-10-28 09:22:38,598 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2020-10-28 09:22:38,796 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2020-10-28 09:22:39,026 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2020-10-28 09:22:39,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:39,162 INFO L93 Difference]: Finished difference Result 228 states and 244 transitions. [2020-10-28 09:22:39,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2020-10-28 09:22:39,163 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 75 [2020-10-28 09:22:39,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:39,164 INFO L225 Difference]: With dead ends: 228 [2020-10-28 09:22:39,164 INFO L226 Difference]: Without dead ends: 172 [2020-10-28 09:22:39,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1808 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=799, Invalid=6007, Unknown=0, NotChecked=0, Total=6806 [2020-10-28 09:22:39,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-28 09:22:39,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 160. [2020-10-28 09:22:39,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-28 09:22:39,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2020-10-28 09:22:39,202 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 75 [2020-10-28 09:22:39,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:39,202 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2020-10-28 09:22:39,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:22:39,202 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2020-10-28 09:22:39,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-28 09:22:39,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:39,204 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:39,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:22:39,204 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:39,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:39,204 INFO L82 PathProgramCache]: Analyzing trace with hash 234270425, now seen corresponding path program 12 times [2020-10-28 09:22:39,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:39,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286896445] [2020-10-28 09:22:39,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:39,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:39,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:39,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:39,303 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:39,335 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:44,242 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:44,242 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-28 09:22:44,242 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:22:44,243 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-28 09:22:44,243 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:44,243 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:22:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:22:44,243 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-28 09:22:44,243 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:44,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:44,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:44,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:44,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:44,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:44,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:44,444 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:44,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:44,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:44,444 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-28 09:22:44,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:44,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:44,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:44,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:44,445 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:44,451 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2020-10-28 09:22:44,451 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286896445] [2020-10-28 09:22:44,451 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:44,451 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:22:44,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399992542] [2020-10-28 09:22:44,452 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:22:44,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:44,452 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:22:44,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:22:44,453 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand 14 states. [2020-10-28 09:22:46,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:22:46,107 INFO L93 Difference]: Finished difference Result 236 states and 253 transitions. [2020-10-28 09:22:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:22:46,109 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 75 [2020-10-28 09:22:46,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:22:46,110 INFO L225 Difference]: With dead ends: 236 [2020-10-28 09:22:46,110 INFO L226 Difference]: Without dead ends: 167 [2020-10-28 09:22:46,111 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=455, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:22:46,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-28 09:22:46,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 147. [2020-10-28 09:22:46,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-28 09:22:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 155 transitions. [2020-10-28 09:22:46,140 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 155 transitions. Word has length 75 [2020-10-28 09:22:46,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:22:46,140 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 155 transitions. [2020-10-28 09:22:46,140 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:22:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 155 transitions. [2020-10-28 09:22:46,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-28 09:22:46,141 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:22:46,142 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:22:46,142 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:22:46,142 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:22:46,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:22:46,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1130017187, now seen corresponding path program 4 times [2020-10-28 09:22:46,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:22:46,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1887301772] [2020-10-28 09:22:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:22:46,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:46,199 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:47,301 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:48,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:49,667 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:51,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 45 [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 67 [2020-10-28 09:22:51,177 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:51,982 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-28 09:22:52,423 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 47 [2020-10-28 09:22:52,676 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 54 [2020-10-28 09:22:52,900 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 43 [2020-10-28 09:22:53,070 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 37 [2020-10-28 09:22:53,767 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 48 [2020-10-28 09:22:54,149 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2020-10-28 09:22:54,536 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 40 [2020-10-28 09:22:54,767 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 52 [2020-10-28 09:22:55,037 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-28 09:22:55,987 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:22:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:55,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:55,994 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:55,994 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:22:55,994 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:55,994 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:22:55,995 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:55,995 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:55,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:55,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:55,995 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:55,995 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:55,997 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2020-10-28 09:22:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:55,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:55,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:55,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:55,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:55,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:22:55,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:55,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:55,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:22:56,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:56,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:22:56,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:56,001 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2020-10-28 09:22:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:22:56,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:22:56,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:22:56,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-28 09:22:56,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:22:56,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-28 09:22:56,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:22:56,012 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:22:56,012 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:22:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:22:56,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:22:56,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:22:56,168 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 2 proven. 57 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-28 09:22:56,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1887301772] [2020-10-28 09:22:56,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:22:56,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:22:56,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082524285] [2020-10-28 09:22:56,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:22:56,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:22:56,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:22:56,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1093, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:22:56,171 INFO L87 Difference]: Start difference. First operand 147 states and 155 transitions. Second operand 35 states. [2020-10-28 09:22:57,083 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 51 [2020-10-28 09:22:57,503 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2020-10-28 09:22:57,759 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2020-10-28 09:22:58,134 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 61 [2020-10-28 09:22:58,326 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 45 [2020-10-28 09:22:58,750 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 31 [2020-10-28 09:22:58,983 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 32 [2020-10-28 09:22:59,225 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 35 [2020-10-28 09:22:59,472 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 36 [2020-10-28 09:22:59,760 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 51 [2020-10-28 09:23:00,016 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-28 09:23:00,263 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2020-10-28 09:23:00,510 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-28 09:23:00,858 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 85 DAG size of output: 48 [2020-10-28 09:23:01,293 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 40 [2020-10-28 09:23:01,748 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 50 [2020-10-28 09:23:02,093 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 46 [2020-10-28 09:23:02,508 WARN L193 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 42