/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-examples/standard_init6_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-28 09:02:29,467 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-28 09:02:29,470 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-28 09:02:29,527 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-28 09:02:29,528 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-28 09:02:29,535 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-28 09:02:29,537 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-28 09:02:29,543 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-28 09:02:29,546 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-28 09:02:29,553 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-28 09:02:29,554 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-28 09:02:29,556 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-28 09:02:29,556 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-28 09:02:29,561 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-28 09:02:29,564 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-28 09:02:29,567 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-28 09:02:29,569 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-28 09:02:29,572 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-28 09:02:29,579 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-28 09:02:29,588 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-28 09:02:29,590 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-28 09:02:29,592 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-28 09:02:29,594 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-28 09:02:29,597 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-28 09:02:29,619 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-28 09:02:29,619 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-28 09:02:29,620 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-28 09:02:29,622 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-28 09:02:29,623 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-28 09:02:29,624 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-28 09:02:29,624 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-28 09:02:29,625 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-28 09:02:29,627 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-28 09:02:29,628 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-28 09:02:29,629 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-28 09:02:29,630 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-28 09:02:29,631 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-28 09:02:29,631 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-28 09:02:29,631 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-28 09:02:29,633 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-28 09:02:29,634 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-28 09:02:29,642 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 09:02:29,697 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-28 09:02:29,697 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-28 09:02:29,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-28 09:02:29,702 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-28 09:02:29,702 INFO L138 SettingsManager]: * Use SBE=true [2020-10-28 09:02:29,703 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-28 09:02:29,703 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-28 09:02:29,703 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-28 09:02:29,703 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-28 09:02:29,704 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-28 09:02:29,705 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-28 09:02:29,705 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-28 09:02:29,706 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-28 09:02:29,706 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-28 09:02:29,706 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-28 09:02:29,707 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-28 09:02:29,707 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-28 09:02:29,707 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-28 09:02:29,707 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-28 09:02:29,708 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-28 09:02:29,708 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-28 09:02:29,708 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-28 09:02:29,709 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-28 09:02:29,709 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-28 09:02:29,709 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-28 09:02:29,710 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-28 09:02:29,710 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-28 09:02:29,710 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-28 09:02:29,711 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-28 09:02:29,711 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=WIDESTAMONGSMALL;tolerance=0.6;log-additional-information=true;unknown-allowed=true; [2020-10-28 09:02:30,109 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-28 09:02:30,146 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-28 09:02:30,150 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-28 09:02:30,151 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-28 09:02:30,152 INFO L275 PluginConnector]: CDTParser initialized [2020-10-28 09:02:30,154 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2020-10-28 09:02:30,250 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fcc6158e/89cef9985e234ce4b0c8c61d574d1df1/FLAG719c5838b [2020-10-28 09:02:30,840 INFO L306 CDTParser]: Found 1 translation units. [2020-10-28 09:02:30,841 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_init6_ground-1.i [2020-10-28 09:02:30,853 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fcc6158e/89cef9985e234ce4b0c8c61d574d1df1/FLAG719c5838b [2020-10-28 09:02:31,218 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2fcc6158e/89cef9985e234ce4b0c8c61d574d1df1 [2020-10-28 09:02:31,224 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-28 09:02:31,231 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-28 09:02:31,233 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:31,233 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-28 09:02:31,237 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-28 09:02:31,238 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,242 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@692a7452 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31, skipping insertion in model container [2020-10-28 09:02:31,242 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,250 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-28 09:02:31,267 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-28 09:02:31,438 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:31,447 INFO L203 MainTranslator]: Completed pre-run [2020-10-28 09:02:31,472 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-28 09:02:31,491 INFO L208 MainTranslator]: Completed translation [2020-10-28 09:02:31,492 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31 WrapperNode [2020-10-28 09:02:31,492 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-28 09:02:31,493 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-28 09:02:31,493 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-28 09:02:31,494 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-28 09:02:31,508 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,517 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,518 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (1/1) ... [2020-10-28 09:02:31,538 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-28 09:02:31,539 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-28 09:02:31,539 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-28 09:02:31,539 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-28 09:02:31,540 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (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 09:02:31,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-28 09:02:31,625 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-28 09:02:31,626 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-28 09:02:31,626 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-28 09:02:31,626 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-28 09:02:31,626 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-28 09:02:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-28 09:02:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2020-10-28 09:02:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2020-10-28 09:02:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-28 09:02:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-28 09:02:31,627 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-28 09:02:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-28 09:02:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-28 09:02:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-28 09:02:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-28 09:02:31,628 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-28 09:02:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-28 09:02:31,629 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-28 09:02:32,175 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-28 09:02:32,175 INFO L298 CfgBuilder]: Removed 7 assume(true) statements. [2020-10-28 09:02:32,178 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:32 BoogieIcfgContainer [2020-10-28 09:02:32,178 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-28 09:02:32,182 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-28 09:02:32,182 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-28 09:02:32,187 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-28 09:02:32,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 28.10 09:02:31" (1/3) ... [2020-10-28 09:02:32,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2864f3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:32, skipping insertion in model container [2020-10-28 09:02:32,189 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 28.10 09:02:31" (2/3) ... [2020-10-28 09:02:32,189 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2864f3de and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 28.10 09:02:32, skipping insertion in model container [2020-10-28 09:02:32,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 28.10 09:02:32" (3/3) ... [2020-10-28 09:02:32,192 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init6_ground-1.i [2020-10-28 09:02:32,206 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-28 09:02:32,214 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-28 09:02:32,231 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-28 09:02:32,274 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-28 09:02:32,274 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-28 09:02:32,274 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-28 09:02:32,274 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-28 09:02:32,275 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-28 09:02:32,275 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-28 09:02:32,275 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-28 09:02:32,275 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-28 09:02:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states. [2020-10-28 09:02:32,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:02:32,311 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:32,312 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:32,312 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:32,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:32,323 INFO L82 PathProgramCache]: Analyzing trace with hash 214825398, now seen corresponding path program 1 times [2020-10-28 09:02:32,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:32,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1963456165] [2020-10-28 09:02:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:32,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:32,515 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:32,559 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:32,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:32,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:32,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:32,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:33,912 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:33,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:02:33,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:33,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1419 [2020-10-28 09:02:33,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:33,917 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:33,917 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-28 09:02:33,918 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:33,918 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-28 09:02:34,037 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:34,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:34,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,055 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:34,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:34,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:34,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-28 09:02:34,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:34,058 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:34,058 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:34,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:34,073 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 09:02:34,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1963456165] [2020-10-28 09:02:34,077 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:34,078 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-28 09:02:34,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419540279] [2020-10-28 09:02:34,089 INFO L461 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-28 09:02:34,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:34,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-28 09:02:34,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-28 09:02:34,114 INFO L87 Difference]: Start difference. First operand 38 states. Second operand 3 states. [2020-10-28 09:02:34,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:34,282 INFO L93 Difference]: Finished difference Result 66 states and 96 transitions. [2020-10-28 09:02:34,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-28 09:02:34,285 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 25 [2020-10-28 09:02:34,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:34,293 INFO L225 Difference]: With dead ends: 66 [2020-10-28 09:02:34,293 INFO L226 Difference]: Without dead ends: 30 [2020-10-28 09:02:34,297 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 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 09:02:34,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-28 09:02:34,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2020-10-28 09:02:34,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-28 09:02:34,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2020-10-28 09:02:34,341 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 25 [2020-10-28 09:02:34,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:34,342 INFO L481 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2020-10-28 09:02:34,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-28 09:02:34,342 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2020-10-28 09:02:34,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-28 09:02:34,343 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:34,343 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:34,344 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-28 09:02:34,344 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:34,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:34,345 INFO L82 PathProgramCache]: Analyzing trace with hash -903446094, now seen corresponding path program 1 times [2020-10-28 09:02:34,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:34,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [705350736] [2020-10-28 09:02:34,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:34,362 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,420 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:34,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,549 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:35,550 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-28 09:02:35,550 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:35,550 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1191 [2020-10-28 09:02:35,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:35,551 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:35,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-28 09:02:35,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-28 09:02:35,551 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-28 09:02:35,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:35,623 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:35,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:35,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:35,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:35,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:35,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:02:35,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:35,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:35,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:35,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:35,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:35,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:35,637 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 09:02:35,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [705350736] [2020-10-28 09:02:35,638 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-28 09:02:35,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-28 09:02:35,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121990761] [2020-10-28 09:02:35,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-28 09:02:35,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:35,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-28 09:02:35,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:35,641 INFO L87 Difference]: Start difference. First operand 30 states and 36 transitions. Second operand 4 states. [2020-10-28 09:02:35,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:35,814 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2020-10-28 09:02:35,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-28 09:02:35,815 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 25 [2020-10-28 09:02:35,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:35,816 INFO L225 Difference]: With dead ends: 59 [2020-10-28 09:02:35,816 INFO L226 Difference]: Without dead ends: 36 [2020-10-28 09:02:35,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-28 09:02:35,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2020-10-28 09:02:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2020-10-28 09:02:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-10-28 09:02:35,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 42 transitions. [2020-10-28 09:02:35,842 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 42 transitions. Word has length 25 [2020-10-28 09:02:35,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:35,842 INFO L481 AbstractCegarLoop]: Abstraction has 36 states and 42 transitions. [2020-10-28 09:02:35,842 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-28 09:02:35,842 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 42 transitions. [2020-10-28 09:02:35,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-28 09:02:35,844 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:35,845 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-28 09:02:35,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-28 09:02:35,845 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:35,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:35,846 INFO L82 PathProgramCache]: Analyzing trace with hash -1214100017, now seen corresponding path program 1 times [2020-10-28 09:02:35,846 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:35,847 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [361078880] [2020-10-28 09:02:35,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:35,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:35,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:38,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,868 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:40,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-28 09:02:40,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-28 09:02:40,869 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:02:40,869 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:40,870 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-28 09:02:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:40,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-28 09:02:40,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:40,952 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:40,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:40,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:40,959 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:40,959 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:40,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:40,960 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:40,960 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:40,960 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:40,960 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:40,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:40,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:40,961 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-28 09:02:40,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [361078880] [2020-10-28 09:02:40,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:40,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-28 09:02:40,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443148951] [2020-10-28 09:02:40,967 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-28 09:02:40,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:40,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-28 09:02:40,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:40,969 INFO L87 Difference]: Start difference. First operand 36 states and 42 transitions. Second operand 5 states. [2020-10-28 09:02:41,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:41,196 INFO L93 Difference]: Finished difference Result 70 states and 87 transitions. [2020-10-28 09:02:41,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-28 09:02:41,197 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-28 09:02:41,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:41,198 INFO L225 Difference]: With dead ends: 70 [2020-10-28 09:02:41,198 INFO L226 Difference]: Without dead ends: 42 [2020-10-28 09:02:41,199 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-28 09:02:41,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-28 09:02:41,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-28 09:02:41,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-28 09:02:41,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2020-10-28 09:02:41,222 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 31 [2020-10-28 09:02:41,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:41,222 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2020-10-28 09:02:41,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-28 09:02:41,223 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2020-10-28 09:02:41,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-28 09:02:41,224 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:41,224 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] [2020-10-28 09:02:41,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-28 09:02:41,224 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:41,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:41,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1678914002, now seen corresponding path program 2 times [2020-10-28 09:02:41,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:41,226 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1889668811] [2020-10-28 09:02:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:41,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:41,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:46,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-28 09:02:46,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:46,255 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:02:46,255 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:46,255 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:46,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-28 09:02:46,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:02:46,256 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-28 09:02:46,262 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 7 [2020-10-28 09:02:46,383 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:46,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:46,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,392 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:46,392 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:46,392 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:46,392 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:46,393 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:46,393 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:46,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:46,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:46,393 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:46,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:46,400 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2020-10-28 09:02:46,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1889668811] [2020-10-28 09:02:46,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:46,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-28 09:02:46,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053557839] [2020-10-28 09:02:46,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-28 09:02:46,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:46,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-28 09:02:46,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:02:46,404 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand 6 states. [2020-10-28 09:02:46,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:46,717 INFO L93 Difference]: Finished difference Result 81 states and 98 transitions. [2020-10-28 09:02:46,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-28 09:02:46,718 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 37 [2020-10-28 09:02:46,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:46,719 INFO L225 Difference]: With dead ends: 81 [2020-10-28 09:02:46,720 INFO L226 Difference]: Without dead ends: 48 [2020-10-28 09:02:46,722 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-28 09:02:46,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-28 09:02:46,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2020-10-28 09:02:46,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-28 09:02:46,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2020-10-28 09:02:46,746 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 37 [2020-10-28 09:02:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:46,747 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2020-10-28 09:02:46,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-28 09:02:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2020-10-28 09:02:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-28 09:02:46,749 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:46,749 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:02:46,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-28 09:02:46,750 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:46,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1997413423, now seen corresponding path program 3 times [2020-10-28 09:02:46,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:46,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330808119] [2020-10-28 09:02:46,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:46,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:46,815 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,841 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:46,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:48,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-10-28 09:02:51,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:51,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:02:51,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,803 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-28 09:02:51,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:02:51,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-28 09:02:51,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:51,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:51,920 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:51,923 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:51,925 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:51,925 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:51,925 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:51,926 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:51,926 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:51,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:51,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:51,926 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:51,927 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:02:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2020-10-28 09:02:51,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330808119] [2020-10-28 09:02:51,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:51,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-28 09:02:51,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197228722] [2020-10-28 09:02:51,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-28 09:02:51,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:51,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-28 09:02:51,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:51,941 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand 7 states. [2020-10-28 09:02:52,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:52,269 INFO L93 Difference]: Finished difference Result 92 states and 109 transitions. [2020-10-28 09:02:52,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-28 09:02:52,270 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-28 09:02:52,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:52,271 INFO L225 Difference]: With dead ends: 92 [2020-10-28 09:02:52,271 INFO L226 Difference]: Without dead ends: 54 [2020-10-28 09:02:52,272 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-28 09:02:52,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-28 09:02:52,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2020-10-28 09:02:52,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-28 09:02:52,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 60 transitions. [2020-10-28 09:02:52,290 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 60 transitions. Word has length 43 [2020-10-28 09:02:52,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:52,290 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 60 transitions. [2020-10-28 09:02:52,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-28 09:02:52,291 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 60 transitions. [2020-10-28 09:02:52,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-28 09:02:52,293 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:52,295 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-28 09:02:52,295 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-28 09:02:52,295 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:52,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:52,296 INFO L82 PathProgramCache]: Analyzing trace with hash -1075963406, now seen corresponding path program 4 times [2020-10-28 09:02:52,296 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:52,296 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [849378788] [2020-10-28 09:02:52,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:52,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:52,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:52,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:55,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,331 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:57,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-28 09:02:57,333 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:02:57,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:02:57,335 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:57,335 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:57,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-28 09:02:57,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:02:57,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-28 09:02:57,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:57,467 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:02:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:57,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,478 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:02:57,478 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:02:57,479 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:02:57,479 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:02:57,479 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:02:57,479 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:02:57,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:02:57,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:02:57,480 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:02:57,480 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-28 09:02:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-28 09:02:57,490 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [849378788] [2020-10-28 09:02:57,492 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:02:57,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-28 09:02:57,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037892951] [2020-10-28 09:02:57,493 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-28 09:02:57,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:02:57,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-28 09:02:57,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:02:57,496 INFO L87 Difference]: Start difference. First operand 54 states and 60 transitions. Second operand 8 states. [2020-10-28 09:02:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:02:57,832 INFO L93 Difference]: Finished difference Result 103 states and 120 transitions. [2020-10-28 09:02:57,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-28 09:02:57,833 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 49 [2020-10-28 09:02:57,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:02:57,834 INFO L225 Difference]: With dead ends: 103 [2020-10-28 09:02:57,834 INFO L226 Difference]: Without dead ends: 60 [2020-10-28 09:02:57,835 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-28 09:02:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-28 09:02:57,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2020-10-28 09:02:57,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-28 09:02:57,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2020-10-28 09:02:57,852 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 49 [2020-10-28 09:02:57,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:02:57,855 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2020-10-28 09:02:57,855 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-28 09:02:57,855 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2020-10-28 09:02:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-28 09:02:57,856 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:02:57,856 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 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 09:02:57,856 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-28 09:02:57,857 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:02:57,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:02:57,858 INFO L82 PathProgramCache]: Analyzing trace with hash 1984295567, now seen corresponding path program 5 times [2020-10-28 09:02:57,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:02:57,859 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [72780229] [2020-10-28 09:02:57,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:02:57,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:02:57,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:57,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:02:58,076 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:01,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:02,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:02,887 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-28 09:03:02,887 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-28 09:03:02,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:03:02,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:02,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-28 09:03:02,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-28 09:03:02,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-28 09:03:02,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:03,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:03,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:03,050 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:03,050 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:03,050 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:03,050 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:03,051 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:03,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:03,051 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:03,057 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-28 09:03:03,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [72780229] [2020-10-28 09:03:03,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:03,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-28 09:03:03,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111008156] [2020-10-28 09:03:03,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-28 09:03:03,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:03,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-28 09:03:03,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:03,060 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand 9 states. [2020-10-28 09:03:03,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:03,357 INFO L93 Difference]: Finished difference Result 114 states and 131 transitions. [2020-10-28 09:03:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-28 09:03:03,358 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-10-28 09:03:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:03,359 INFO L225 Difference]: With dead ends: 114 [2020-10-28 09:03:03,360 INFO L226 Difference]: Without dead ends: 66 [2020-10-28 09:03:03,361 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-28 09:03:03,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-28 09:03:03,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-28 09:03:03,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-28 09:03:03,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 72 transitions. [2020-10-28 09:03:03,373 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 72 transitions. Word has length 55 [2020-10-28 09:03:03,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:03,373 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 72 transitions. [2020-10-28 09:03:03,373 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-28 09:03:03,383 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 72 transitions. [2020-10-28 09:03:03,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-28 09:03:03,384 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:03,384 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 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 09:03:03,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-28 09:03:03,385 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:03,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:03,385 INFO L82 PathProgramCache]: Analyzing trace with hash 1472739858, now seen corresponding path program 6 times [2020-10-28 09:03:03,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:03,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1915783298] [2020-10-28 09:03:03,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:03,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:03,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,556 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:03,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,456 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:08,456 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-28 09:03:08,456 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:08,456 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-28 09:03:08,456 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:08,457 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-28 09:03:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:03:08,457 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-28 09:03:08,457 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:08,640 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:08,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:08,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:08,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:08,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:08,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:08,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:08,646 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:08,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:08,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:08,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:08,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:08,652 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2020-10-28 09:03:08,653 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1915783298] [2020-10-28 09:03:08,653 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:08,653 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-28 09:03:08,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031716961] [2020-10-28 09:03:08,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-28 09:03:08,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:08,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-28 09:03:08,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:08,655 INFO L87 Difference]: Start difference. First operand 66 states and 72 transitions. Second operand 10 states. [2020-10-28 09:03:09,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:09,073 INFO L93 Difference]: Finished difference Result 125 states and 142 transitions. [2020-10-28 09:03:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-28 09:03:09,074 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 61 [2020-10-28 09:03:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:09,075 INFO L225 Difference]: With dead ends: 125 [2020-10-28 09:03:09,075 INFO L226 Difference]: Without dead ends: 72 [2020-10-28 09:03:09,080 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-28 09:03:09,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-28 09:03:09,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2020-10-28 09:03:09,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-28 09:03:09,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 78 transitions. [2020-10-28 09:03:09,100 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 78 transitions. Word has length 61 [2020-10-28 09:03:09,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:09,101 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 78 transitions. [2020-10-28 09:03:09,101 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-28 09:03:09,101 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 78 transitions. [2020-10-28 09:03:09,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-28 09:03:09,102 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:09,102 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 1, 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 09:03:09,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-28 09:03:09,103 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:09,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:09,107 INFO L82 PathProgramCache]: Analyzing trace with hash 1747701999, now seen corresponding path program 7 times [2020-10-28 09:03:09,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:09,108 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672446414] [2020-10-28 09:03:09,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:09,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:09,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,189 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:09,321 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,138 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:14,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-28 09:03:14,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:14,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:03:14,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:14,139 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:14,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-28 09:03:14,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 09:03:14,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-28 09:03:14,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:14,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:14,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:14,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:14,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:14,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:14,345 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:14,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:14,346 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:14,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:14,346 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:14,353 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2020-10-28 09:03:14,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672446414] [2020-10-28 09:03:14,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:14,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-28 09:03:14,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540533158] [2020-10-28 09:03:14,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-28 09:03:14,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:14,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-28 09:03:14,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:14,356 INFO L87 Difference]: Start difference. First operand 72 states and 78 transitions. Second operand 11 states. [2020-10-28 09:03:14,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:14,768 INFO L93 Difference]: Finished difference Result 136 states and 153 transitions. [2020-10-28 09:03:14,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-28 09:03:14,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 67 [2020-10-28 09:03:14,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:14,770 INFO L225 Difference]: With dead ends: 136 [2020-10-28 09:03:14,770 INFO L226 Difference]: Without dead ends: 78 [2020-10-28 09:03:14,771 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-28 09:03:14,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-28 09:03:14,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2020-10-28 09:03:14,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-28 09:03:14,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 84 transitions. [2020-10-28 09:03:14,781 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 84 transitions. Word has length 67 [2020-10-28 09:03:14,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:14,782 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 84 transitions. [2020-10-28 09:03:14,782 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-28 09:03:14,782 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 84 transitions. [2020-10-28 09:03:14,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-28 09:03:14,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:14,783 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 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 09:03:14,784 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-28 09:03:14,784 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:14,785 INFO L82 PathProgramCache]: Analyzing trace with hash -141651406, now seen corresponding path program 8 times [2020-10-28 09:03:14,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:14,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [690760764] [2020-10-28 09:03:14,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:14,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:14,927 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:15,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:19,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:19,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-28 09:03:19,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:19,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:03:19,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:19,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:19,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-28 09:03:19,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-28 09:03:19,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-28 09:03:19,820 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:20,013 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:20,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:20,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:20,020 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:20,021 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:20,021 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:20,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:20,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:20,021 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:20,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:20,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:20,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:20,029 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2020-10-28 09:03:20,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [690760764] [2020-10-28 09:03:20,030 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:20,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-28 09:03:20,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252454547] [2020-10-28 09:03:20,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-28 09:03:20,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:20,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-28 09:03:20,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:20,036 INFO L87 Difference]: Start difference. First operand 78 states and 84 transitions. Second operand 12 states. [2020-10-28 09:03:20,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:20,596 INFO L93 Difference]: Finished difference Result 147 states and 164 transitions. [2020-10-28 09:03:20,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-28 09:03:20,597 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 73 [2020-10-28 09:03:20,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:20,598 INFO L225 Difference]: With dead ends: 147 [2020-10-28 09:03:20,598 INFO L226 Difference]: Without dead ends: 84 [2020-10-28 09:03:20,599 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-28 09:03:20,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-28 09:03:20,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-28 09:03:20,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-28 09:03:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 90 transitions. [2020-10-28 09:03:20,623 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 90 transitions. Word has length 73 [2020-10-28 09:03:20,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:20,624 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 90 transitions. [2020-10-28 09:03:20,624 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-28 09:03:20,624 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 90 transitions. [2020-10-28 09:03:20,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-10-28 09:03:20,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:20,628 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 1, 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 09:03:20,629 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-28 09:03:20,629 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:20,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:20,631 INFO L82 PathProgramCache]: Analyzing trace with hash -836651185, now seen corresponding path program 9 times [2020-10-28 09:03:20,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:20,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988863600] [2020-10-28 09:03:20,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:20,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:20,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:20,731 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:20,793 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:20,836 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:21,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:25,665 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:25,665 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-10-28 09:03:25,665 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:25,665 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:03:25,665 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:25,666 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-28 09:03:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-28 09:03:25,666 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-28 09:03:25,666 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:25,944 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:25,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:25,947 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:25,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:25,951 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:25,951 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:25,951 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:25,952 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:25,953 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:25,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:25,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:25,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:25,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-28 09:03:25,969 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 225 trivial. 0 not checked. [2020-10-28 09:03:25,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988863600] [2020-10-28 09:03:25,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:25,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-28 09:03:25,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50829942] [2020-10-28 09:03:25,972 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-28 09:03:25,972 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:25,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-28 09:03:25,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:25,973 INFO L87 Difference]: Start difference. First operand 84 states and 90 transitions. Second operand 13 states. [2020-10-28 09:03:26,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:26,562 INFO L93 Difference]: Finished difference Result 158 states and 175 transitions. [2020-10-28 09:03:26,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-28 09:03:26,562 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 79 [2020-10-28 09:03:26,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:26,563 INFO L225 Difference]: With dead ends: 158 [2020-10-28 09:03:26,564 INFO L226 Difference]: Without dead ends: 90 [2020-10-28 09:03:26,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-28 09:03:26,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-28 09:03:26,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2020-10-28 09:03:26,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-28 09:03:26,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 96 transitions. [2020-10-28 09:03:26,582 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 96 transitions. Word has length 79 [2020-10-28 09:03:26,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:26,582 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 96 transitions. [2020-10-28 09:03:26,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-28 09:03:26,583 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 96 transitions. [2020-10-28 09:03:26,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-28 09:03:26,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:26,592 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 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 09:03:26,592 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-28 09:03:26,593 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:26,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:26,594 INFO L82 PathProgramCache]: Analyzing trace with hash -1670438318, now seen corresponding path program 10 times [2020-10-28 09:03:26,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:26,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1254558176] [2020-10-28 09:03:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:26,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:26,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:26,696 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:26,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:26,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:27,042 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:31,637 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:31,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-28 09:03:31,638 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:03:31,638 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:31,638 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-28 09:03:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-28 09:03:31,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-28 09:03:31,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:31,897 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:31,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:31,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:31,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:31,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:31,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:31,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:31,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:31,903 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:31,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:31,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:31,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:31,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:31,912 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 275 trivial. 0 not checked. [2020-10-28 09:03:31,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1254558176] [2020-10-28 09:03:31,913 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:31,913 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-28 09:03:31,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336633165] [2020-10-28 09:03:31,914 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-28 09:03:31,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:31,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-28 09:03:31,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:31,915 INFO L87 Difference]: Start difference. First operand 90 states and 96 transitions. Second operand 14 states. [2020-10-28 09:03:32,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:32,290 INFO L93 Difference]: Finished difference Result 169 states and 186 transitions. [2020-10-28 09:03:32,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-28 09:03:32,291 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 85 [2020-10-28 09:03:32,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:32,292 INFO L225 Difference]: With dead ends: 169 [2020-10-28 09:03:32,292 INFO L226 Difference]: Without dead ends: 96 [2020-10-28 09:03:32,295 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-28 09:03:32,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-28 09:03:32,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2020-10-28 09:03:32,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-28 09:03:32,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 102 transitions. [2020-10-28 09:03:32,314 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 102 transitions. Word has length 85 [2020-10-28 09:03:32,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:32,314 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 102 transitions. [2020-10-28 09:03:32,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-28 09:03:32,314 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 102 transitions. [2020-10-28 09:03:32,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-28 09:03:32,315 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:32,316 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 1, 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 09:03:32,316 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-28 09:03:32,316 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:32,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:32,319 INFO L82 PathProgramCache]: Analyzing trace with hash 403285423, now seen corresponding path program 11 times [2020-10-28 09:03:32,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:32,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1602668909] [2020-10-28 09:03:32,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:32,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:32,372 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:32,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:34,727 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:37,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:37,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 101 [2020-10-28 09:03:37,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:37,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:03:37,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:37,357 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-28 09:03:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-28 09:03:37,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-28 09:03:37,357 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:37,650 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:37,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:37,657 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:37,657 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:37,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:37,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-28 09:03:37,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:37,658 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:37,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:37,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:37,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:37,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:37,667 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2020-10-28 09:03:37,667 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1602668909] [2020-10-28 09:03:37,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:37,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-28 09:03:37,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981616982] [2020-10-28 09:03:37,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-28 09:03:37,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:37,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-28 09:03:37,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:03:37,669 INFO L87 Difference]: Start difference. First operand 96 states and 102 transitions. Second operand 15 states. [2020-10-28 09:03:38,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:38,164 INFO L93 Difference]: Finished difference Result 180 states and 197 transitions. [2020-10-28 09:03:38,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-28 09:03:38,165 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 91 [2020-10-28 09:03:38,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:38,166 INFO L225 Difference]: With dead ends: 180 [2020-10-28 09:03:38,166 INFO L226 Difference]: Without dead ends: 102 [2020-10-28 09:03:38,167 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-28 09:03:38,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-28 09:03:38,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-28 09:03:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-28 09:03:38,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 108 transitions. [2020-10-28 09:03:38,175 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 108 transitions. Word has length 91 [2020-10-28 09:03:38,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:38,175 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 108 transitions. [2020-10-28 09:03:38,175 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-28 09:03:38,176 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 108 transitions. [2020-10-28 09:03:38,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-28 09:03:38,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:38,177 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 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 09:03:38,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-28 09:03:38,177 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:38,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:38,178 INFO L82 PathProgramCache]: Analyzing trace with hash 1428679282, now seen corresponding path program 12 times [2020-10-28 09:03:38,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:38,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671739515] [2020-10-28 09:03:38,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:38,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:38,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:38,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:38,345 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:38,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:41,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:43,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 39 [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-28 09:03:43,217 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:43,571 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:43,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:43,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:43,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:43,578 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:43,578 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:03:43,579 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:43,579 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:43,579 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:43,579 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:43,591 INFO L134 CoverageAnalysis]: Checked inductivity of 468 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 390 trivial. 0 not checked. [2020-10-28 09:03:43,591 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671739515] [2020-10-28 09:03:43,591 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:43,592 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-28 09:03:43,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516932068] [2020-10-28 09:03:43,592 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-28 09:03:43,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:43,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-28 09:03:43,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:03:43,594 INFO L87 Difference]: Start difference. First operand 102 states and 108 transitions. Second operand 16 states. [2020-10-28 09:03:44,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:44,061 INFO L93 Difference]: Finished difference Result 191 states and 208 transitions. [2020-10-28 09:03:44,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-28 09:03:44,062 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 97 [2020-10-28 09:03:44,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:44,063 INFO L225 Difference]: With dead ends: 191 [2020-10-28 09:03:44,063 INFO L226 Difference]: Without dead ends: 108 [2020-10-28 09:03:44,064 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-28 09:03:44,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-28 09:03:44,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2020-10-28 09:03:44,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-10-28 09:03:44,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 114 transitions. [2020-10-28 09:03:44,071 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 114 transitions. Word has length 97 [2020-10-28 09:03:44,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:44,072 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 114 transitions. [2020-10-28 09:03:44,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-28 09:03:44,072 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 114 transitions. [2020-10-28 09:03:44,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-10-28 09:03:44,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:44,073 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 1, 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 09:03:44,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-28 09:03:44,073 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:44,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:44,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1002071025, now seen corresponding path program 13 times [2020-10-28 09:03:44,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:44,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144404142] [2020-10-28 09:03:44,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:44,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:44,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:44,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:44,309 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:44,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:47,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:49,117 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:49,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-28 09:03:49,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:49,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-28 09:03:49,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:49,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-28 09:03:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 09:03:49,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-28 09:03:49,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:49,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:49,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:49,513 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:49,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:49,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:49,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:49,515 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:03:49,515 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:49,516 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:49,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:49,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:49,526 INFO L134 CoverageAnalysis]: Checked inductivity of 546 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 455 trivial. 0 not checked. [2020-10-28 09:03:49,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144404142] [2020-10-28 09:03:49,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:49,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-28 09:03:49,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612679680] [2020-10-28 09:03:49,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-28 09:03:49,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:49,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-28 09:03:49,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:03:49,529 INFO L87 Difference]: Start difference. First operand 108 states and 114 transitions. Second operand 17 states. [2020-10-28 09:03:50,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:50,074 INFO L93 Difference]: Finished difference Result 202 states and 219 transitions. [2020-10-28 09:03:50,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-28 09:03:50,075 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 103 [2020-10-28 09:03:50,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:50,077 INFO L225 Difference]: With dead ends: 202 [2020-10-28 09:03:50,077 INFO L226 Difference]: Without dead ends: 114 [2020-10-28 09:03:50,078 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-28 09:03:50,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-28 09:03:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 114. [2020-10-28 09:03:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-28 09:03:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 120 transitions. [2020-10-28 09:03:50,085 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 120 transitions. Word has length 103 [2020-10-28 09:03:50,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:50,086 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 120 transitions. [2020-10-28 09:03:50,086 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-28 09:03:50,086 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 120 transitions. [2020-10-28 09:03:50,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-28 09:03:50,087 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:50,087 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 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 09:03:50,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-28 09:03:50,087 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:50,088 INFO L82 PathProgramCache]: Analyzing trace with hash 569830034, now seen corresponding path program 14 times [2020-10-28 09:03:50,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:50,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821147517] [2020-10-28 09:03:50,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:50,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:50,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:50,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:50,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:50,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:54,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:55,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:55,127 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-28 09:03:55,127 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-28 09:03:55,127 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-28 09:03:55,127 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:55,127 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:55,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-28 09:03:55,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:03:55,128 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-28 09:03:55,128 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:55,507 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:03:55,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:55,510 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:55,512 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:03:55,512 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:03:55,512 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:03:55,512 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:03:55,512 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:03:55,513 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:03:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:03:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:03:55,513 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:03:55,513 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:03:55,525 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 525 trivial. 0 not checked. [2020-10-28 09:03:55,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821147517] [2020-10-28 09:03:55,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:03:55,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-28 09:03:55,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851942849] [2020-10-28 09:03:55,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-28 09:03:55,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:03:55,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-28 09:03:55,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:03:55,532 INFO L87 Difference]: Start difference. First operand 114 states and 120 transitions. Second operand 18 states. [2020-10-28 09:03:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:03:56,101 INFO L93 Difference]: Finished difference Result 213 states and 230 transitions. [2020-10-28 09:03:56,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-28 09:03:56,102 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 109 [2020-10-28 09:03:56,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:03:56,104 INFO L225 Difference]: With dead ends: 213 [2020-10-28 09:03:56,104 INFO L226 Difference]: Without dead ends: 120 [2020-10-28 09:03:56,105 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-28 09:03:56,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-28 09:03:56,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2020-10-28 09:03:56,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-28 09:03:56,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 126 transitions. [2020-10-28 09:03:56,115 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 126 transitions. Word has length 109 [2020-10-28 09:03:56,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:03:56,116 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 126 transitions. [2020-10-28 09:03:56,116 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-28 09:03:56,116 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 126 transitions. [2020-10-28 09:03:56,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-28 09:03:56,117 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:03:56,118 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 1, 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 09:03:56,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-28 09:03:56,118 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:03:56,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:03:56,119 INFO L82 PathProgramCache]: Analyzing trace with hash 2142739055, now seen corresponding path program 15 times [2020-10-28 09:03:56,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:03:56,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140106458] [2020-10-28 09:03:56,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:03:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:03:56,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:56,294 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:56,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:03:56,424 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:01,164 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:01,164 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-28 09:04:01,164 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:01,164 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:04:01,164 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:01,164 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-28 09:04:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:01,165 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-28 09:04:01,165 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:01,624 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:01,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:01,628 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:01,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:01,631 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:01,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:01,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:04:01,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:01,632 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:01,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:01,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:01,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:01,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:01,644 INFO L134 CoverageAnalysis]: Checked inductivity of 720 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-28 09:04:01,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140106458] [2020-10-28 09:04:01,645 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:01,645 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-28 09:04:01,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105388748] [2020-10-28 09:04:01,646 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-28 09:04:01,646 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:01,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-28 09:04:01,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:01,657 INFO L87 Difference]: Start difference. First operand 120 states and 126 transitions. Second operand 19 states. [2020-10-28 09:04:02,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:02,266 INFO L93 Difference]: Finished difference Result 224 states and 241 transitions. [2020-10-28 09:04:02,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-28 09:04:02,267 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 115 [2020-10-28 09:04:02,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:02,269 INFO L225 Difference]: With dead ends: 224 [2020-10-28 09:04:02,269 INFO L226 Difference]: Without dead ends: 126 [2020-10-28 09:04:02,270 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-28 09:04:02,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-28 09:04:02,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2020-10-28 09:04:02,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-28 09:04:02,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 132 transitions. [2020-10-28 09:04:02,277 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 132 transitions. Word has length 115 [2020-10-28 09:04:02,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:02,278 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 132 transitions. [2020-10-28 09:04:02,278 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-28 09:04:02,278 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 132 transitions. [2020-10-28 09:04:02,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-28 09:04:02,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:02,279 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 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 09:04:02,279 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-28 09:04:02,279 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:02,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:02,280 INFO L82 PathProgramCache]: Analyzing trace with hash -728096078, now seen corresponding path program 16 times [2020-10-28 09:04:02,280 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:02,281 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [907685887] [2020-10-28 09:04:02,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:02,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:02,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:02,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:02,463 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:02,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:07,313 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-28 09:04:07,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:07,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:07,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:07,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:07,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:07,837 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:07,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:07,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:04:07,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:07,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:07,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:07,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:07,838 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:07,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:07,851 INFO L134 CoverageAnalysis]: Checked inductivity of 816 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 680 trivial. 0 not checked. [2020-10-28 09:04:07,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [907685887] [2020-10-28 09:04:07,852 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:07,852 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-28 09:04:07,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341745477] [2020-10-28 09:04:07,853 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-28 09:04:07,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:07,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-28 09:04:07,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:07,854 INFO L87 Difference]: Start difference. First operand 126 states and 132 transitions. Second operand 20 states. [2020-10-28 09:04:08,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:08,551 INFO L93 Difference]: Finished difference Result 235 states and 252 transitions. [2020-10-28 09:04:08,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-28 09:04:08,551 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 121 [2020-10-28 09:04:08,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:08,553 INFO L225 Difference]: With dead ends: 235 [2020-10-28 09:04:08,553 INFO L226 Difference]: Without dead ends: 132 [2020-10-28 09:04:08,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-28 09:04:08,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-10-28 09:04:08,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2020-10-28 09:04:08,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-28 09:04:08,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 138 transitions. [2020-10-28 09:04:08,562 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 138 transitions. Word has length 121 [2020-10-28 09:04:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:08,562 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 138 transitions. [2020-10-28 09:04:08,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-28 09:04:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 138 transitions. [2020-10-28 09:04:08,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-28 09:04:08,564 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:08,564 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 1, 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 09:04:08,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-28 09:04:08,564 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:08,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:08,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1170317519, now seen corresponding path program 17 times [2020-10-28 09:04:08,565 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:08,565 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1527686410] [2020-10-28 09:04:08,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:08,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:08,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:08,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:08,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:08,823 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:13,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:13,599 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-28 09:04:13,599 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:13,599 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:04:13,599 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:13,599 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:13,599 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-28 09:04:13,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-28 09:04:13,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-28 09:04:13,600 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:14,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:14,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:14,165 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:14,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:14,166 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:14,166 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:14,166 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:14,166 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:14,167 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:14,167 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:14,181 INFO L134 CoverageAnalysis]: Checked inductivity of 918 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 765 trivial. 0 not checked. [2020-10-28 09:04:14,181 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1527686410] [2020-10-28 09:04:14,181 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:14,181 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-28 09:04:14,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206376150] [2020-10-28 09:04:14,182 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-28 09:04:14,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:14,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-28 09:04:14,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:14,183 INFO L87 Difference]: Start difference. First operand 132 states and 138 transitions. Second operand 21 states. [2020-10-28 09:04:14,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:14,895 INFO L93 Difference]: Finished difference Result 246 states and 263 transitions. [2020-10-28 09:04:14,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-28 09:04:14,896 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 127 [2020-10-28 09:04:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:14,898 INFO L225 Difference]: With dead ends: 246 [2020-10-28 09:04:14,898 INFO L226 Difference]: Without dead ends: 138 [2020-10-28 09:04:14,899 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-28 09:04:14,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-28 09:04:14,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 138. [2020-10-28 09:04:14,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-28 09:04:14,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 144 transitions. [2020-10-28 09:04:14,908 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 144 transitions. Word has length 127 [2020-10-28 09:04:14,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:14,908 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 144 transitions. [2020-10-28 09:04:14,908 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-28 09:04:14,908 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 144 transitions. [2020-10-28 09:04:14,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2020-10-28 09:04:14,910 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:14,910 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 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 09:04:14,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-28 09:04:14,910 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:14,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:14,910 INFO L82 PathProgramCache]: Analyzing trace with hash -263220526, now seen corresponding path program 18 times [2020-10-28 09:04:14,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:14,911 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [33679845] [2020-10-28 09:04:14,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:14,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:14,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,108 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:15,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:19,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:19,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 143 [2020-10-28 09:04:19,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:19,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5018 [2020-10-28 09:04:19,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:19,962 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-28 09:04:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:19,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-28 09:04:19,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:20,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:20,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:20,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:20,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:20,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:20,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:20,567 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:20,567 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:20,567 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:20,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:20,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:20,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:20,568 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:20,582 INFO L134 CoverageAnalysis]: Checked inductivity of 1026 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 855 trivial. 0 not checked. [2020-10-28 09:04:20,583 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [33679845] [2020-10-28 09:04:20,583 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:20,583 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-28 09:04:20,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032933694] [2020-10-28 09:04:20,584 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-28 09:04:20,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:20,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-28 09:04:20,585 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:04:20,585 INFO L87 Difference]: Start difference. First operand 138 states and 144 transitions. Second operand 22 states. [2020-10-28 09:04:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:21,275 INFO L93 Difference]: Finished difference Result 257 states and 274 transitions. [2020-10-28 09:04:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-28 09:04:21,276 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 133 [2020-10-28 09:04:21,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:21,277 INFO L225 Difference]: With dead ends: 257 [2020-10-28 09:04:21,277 INFO L226 Difference]: Without dead ends: 144 [2020-10-28 09:04:21,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-28 09:04:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-28 09:04:21,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2020-10-28 09:04:21,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-28 09:04:21,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 150 transitions. [2020-10-28 09:04:21,294 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 150 transitions. Word has length 133 [2020-10-28 09:04:21,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:21,295 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 150 transitions. [2020-10-28 09:04:21,295 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-28 09:04:21,295 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 150 transitions. [2020-10-28 09:04:21,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-28 09:04:21,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:21,297 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 1, 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 09:04:21,297 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-28 09:04:21,297 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:21,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:21,297 INFO L82 PathProgramCache]: Analyzing trace with hash -2142916817, now seen corresponding path program 19 times [2020-10-28 09:04:21,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:21,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [326753975] [2020-10-28 09:04:21,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:21,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:21,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:21,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:21,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:21,604 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:26,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:26,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-28 09:04:26,360 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:26,360 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:04:26,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:26,360 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-28 09:04:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:26,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-28 09:04:26,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:27,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:27,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:27,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:27,012 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:27,012 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:27,012 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:27,012 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:27,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:27,013 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:27,013 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1140 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 950 trivial. 0 not checked. [2020-10-28 09:04:27,025 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [326753975] [2020-10-28 09:04:27,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:27,026 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-28 09:04:27,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315059969] [2020-10-28 09:04:27,026 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-28 09:04:27,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:27,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-28 09:04:27,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:04:27,027 INFO L87 Difference]: Start difference. First operand 144 states and 150 transitions. Second operand 23 states. [2020-10-28 09:04:27,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:27,807 INFO L93 Difference]: Finished difference Result 268 states and 285 transitions. [2020-10-28 09:04:27,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-28 09:04:27,808 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 139 [2020-10-28 09:04:27,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:27,809 INFO L225 Difference]: With dead ends: 268 [2020-10-28 09:04:27,809 INFO L226 Difference]: Without dead ends: 150 [2020-10-28 09:04:27,810 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-28 09:04:27,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-28 09:04:27,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2020-10-28 09:04:27,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-28 09:04:27,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 156 transitions. [2020-10-28 09:04:27,820 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 156 transitions. Word has length 139 [2020-10-28 09:04:27,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:27,820 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 156 transitions. [2020-10-28 09:04:27,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-28 09:04:27,820 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 156 transitions. [2020-10-28 09:04:27,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2020-10-28 09:04:27,822 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:27,822 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 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 09:04:27,822 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-28 09:04:27,822 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:27,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:27,823 INFO L82 PathProgramCache]: Analyzing trace with hash -1982514446, now seen corresponding path program 20 times [2020-10-28 09:04:27,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:27,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1042377978] [2020-10-28 09:04:27,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:27,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:27,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:28,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:32,888 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:32,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-28 09:04:32,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:32,888 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5016 [2020-10-28 09:04:32,888 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:32,888 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:32,888 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-28 09:04:32,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-28 09:04:32,889 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-28 09:04:32,889 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:33,621 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:33,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:33,626 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:33,626 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:33,626 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:33,626 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:33,627 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:33,627 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:33,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:33,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:33,627 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:33,627 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:33,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1260 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 1050 trivial. 0 not checked. [2020-10-28 09:04:33,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1042377978] [2020-10-28 09:04:33,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:33,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-28 09:04:33,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667902480] [2020-10-28 09:04:33,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-28 09:04:33,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:33,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-28 09:04:33,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:04:33,643 INFO L87 Difference]: Start difference. First operand 150 states and 156 transitions. Second operand 24 states. [2020-10-28 09:04:34,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:34,359 INFO L93 Difference]: Finished difference Result 279 states and 296 transitions. [2020-10-28 09:04:34,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-28 09:04:34,362 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 145 [2020-10-28 09:04:34,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:34,364 INFO L225 Difference]: With dead ends: 279 [2020-10-28 09:04:34,364 INFO L226 Difference]: Without dead ends: 156 [2020-10-28 09:04:34,365 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-28 09:04:34,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2020-10-28 09:04:34,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 156. [2020-10-28 09:04:34,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-28 09:04:34,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 162 transitions. [2020-10-28 09:04:34,379 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 162 transitions. Word has length 145 [2020-10-28 09:04:34,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:34,380 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 162 transitions. [2020-10-28 09:04:34,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-28 09:04:34,380 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 162 transitions. [2020-10-28 09:04:34,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2020-10-28 09:04:34,382 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:34,382 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 1, 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 09:04:34,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-28 09:04:34,382 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:34,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:34,383 INFO L82 PathProgramCache]: Analyzing trace with hash 665175439, now seen corresponding path program 21 times [2020-10-28 09:04:34,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:34,389 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925854869] [2020-10-28 09:04:34,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:34,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:34,457 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:34,549 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:34,636 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:34,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:39,439 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:39,439 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-28 09:04:39,440 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:39,440 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:04:39,440 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:39,440 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:39,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-28 09:04:39,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 80 [2020-10-28 09:04:39,440 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-28 09:04:39,440 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:40,241 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:40,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:40,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:40,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:40,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:40,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:40,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:40,247 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:40,247 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:40,247 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:40,259 INFO L134 CoverageAnalysis]: Checked inductivity of 1386 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 1155 trivial. 0 not checked. [2020-10-28 09:04:40,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925854869] [2020-10-28 09:04:40,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:40,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-28 09:04:40,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017815888] [2020-10-28 09:04:40,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-28 09:04:40,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:40,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-28 09:04:40,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:04:40,262 INFO L87 Difference]: Start difference. First operand 156 states and 162 transitions. Second operand 25 states. [2020-10-28 09:04:40,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:40,998 INFO L93 Difference]: Finished difference Result 290 states and 307 transitions. [2020-10-28 09:04:40,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-28 09:04:40,998 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 151 [2020-10-28 09:04:40,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:41,000 INFO L225 Difference]: With dead ends: 290 [2020-10-28 09:04:41,001 INFO L226 Difference]: Without dead ends: 162 [2020-10-28 09:04:41,002 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-28 09:04:41,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-28 09:04:41,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 162. [2020-10-28 09:04:41,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-28 09:04:41,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 168 transitions. [2020-10-28 09:04:41,024 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 168 transitions. Word has length 151 [2020-10-28 09:04:41,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:41,026 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 168 transitions. [2020-10-28 09:04:41,026 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-28 09:04:41,026 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 168 transitions. [2020-10-28 09:04:41,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-28 09:04:41,028 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:41,028 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 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 09:04:41,028 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-28 09:04:41,029 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:41,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:41,031 INFO L82 PathProgramCache]: Analyzing trace with hash 661199634, now seen corresponding path program 22 times [2020-10-28 09:04:41,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:41,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786593759] [2020-10-28 09:04:41,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:41,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:41,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:41,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:41,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:41,554 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:46,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:46,107 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 167 [2020-10-28 09:04:46,107 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:46,107 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-28 09:04:46,107 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:46,107 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-28 09:04:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-28 09:04:46,108 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-28 09:04:46,108 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:46,959 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:46,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:46,963 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:46,965 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:46,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:46,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:46,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:04:46,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:46,965 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:46,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:46,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:46,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:46,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1518 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 1265 trivial. 0 not checked. [2020-10-28 09:04:46,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786593759] [2020-10-28 09:04:46,980 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:46,980 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-28 09:04:46,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715575765] [2020-10-28 09:04:46,981 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-28 09:04:46,981 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:46,981 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-28 09:04:46,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:04:46,982 INFO L87 Difference]: Start difference. First operand 162 states and 168 transitions. Second operand 26 states. [2020-10-28 09:04:47,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:47,684 INFO L93 Difference]: Finished difference Result 301 states and 318 transitions. [2020-10-28 09:04:47,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-28 09:04:47,684 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 157 [2020-10-28 09:04:47,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:47,686 INFO L225 Difference]: With dead ends: 301 [2020-10-28 09:04:47,686 INFO L226 Difference]: Without dead ends: 168 [2020-10-28 09:04:47,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-28 09:04:47,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-28 09:04:47,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2020-10-28 09:04:47,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-28 09:04:47,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 174 transitions. [2020-10-28 09:04:47,696 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 174 transitions. Word has length 157 [2020-10-28 09:04:47,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:47,697 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 174 transitions. [2020-10-28 09:04:47,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-28 09:04:47,697 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 174 transitions. [2020-10-28 09:04:47,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-28 09:04:47,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:47,702 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 1, 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 09:04:47,704 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-28 09:04:47,704 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:47,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:47,704 INFO L82 PathProgramCache]: Analyzing trace with hash -490478609, now seen corresponding path program 23 times [2020-10-28 09:04:47,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:47,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [34379767] [2020-10-28 09:04:47,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:47,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:47,780 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:47,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:47,984 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:48,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:52,762 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:52,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 173 [2020-10-28 09:04:52,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:52,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-28 09:04:52,762 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:52,762 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:52,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-28 09:04:52,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 86 [2020-10-28 09:04:52,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-28 09:04:52,763 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:53,686 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:04:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:53,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:53,690 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:53,690 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:04:53,690 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:04:53,690 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:04:53,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:53,690 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:53,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:04:53,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:04:53,691 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:04:53,691 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:04:53,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1656 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1380 trivial. 0 not checked. [2020-10-28 09:04:53,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [34379767] [2020-10-28 09:04:53,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:04:53,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-28 09:04:53,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520641836] [2020-10-28 09:04:53,707 INFO L461 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-28 09:04:53,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:04:53,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-28 09:04:53,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:04:53,708 INFO L87 Difference]: Start difference. First operand 168 states and 174 transitions. Second operand 27 states. [2020-10-28 09:04:54,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:04:54,444 INFO L93 Difference]: Finished difference Result 312 states and 329 transitions. [2020-10-28 09:04:54,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-28 09:04:54,445 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 163 [2020-10-28 09:04:54,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:04:54,447 INFO L225 Difference]: With dead ends: 312 [2020-10-28 09:04:54,447 INFO L226 Difference]: Without dead ends: 174 [2020-10-28 09:04:54,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-28 09:04:54,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-28 09:04:54,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 174. [2020-10-28 09:04:54,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-28 09:04:54,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 180 transitions. [2020-10-28 09:04:54,456 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 180 transitions. Word has length 163 [2020-10-28 09:04:54,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:04:54,456 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 180 transitions. [2020-10-28 09:04:54,456 INFO L482 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-28 09:04:54,456 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 180 transitions. [2020-10-28 09:04:54,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-28 09:04:54,458 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:04:54,458 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 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 09:04:54,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-28 09:04:54,459 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:04:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:04:54,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1597426894, now seen corresponding path program 24 times [2020-10-28 09:04:54,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:04:54,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [286276214] [2020-10-28 09:04:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:04:54,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:04:54,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:54,663 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:54,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:54,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:04:59,524 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:04:59,524 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-28 09:04:59,525 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:04:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:04:59,525 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:04:59,525 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:04:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-28 09:04:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-28 09:04:59,525 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-28 09:04:59,525 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:00,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:00,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:00,488 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:00,489 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:00,489 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:00,489 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:00,489 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:00,489 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:00,490 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:00,490 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:00,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1800 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1500 trivial. 0 not checked. [2020-10-28 09:05:00,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [286276214] [2020-10-28 09:05:00,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:00,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-28 09:05:00,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631891863] [2020-10-28 09:05:00,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-28 09:05:00,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:00,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-28 09:05:00,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:05:00,517 INFO L87 Difference]: Start difference. First operand 174 states and 180 transitions. Second operand 28 states. [2020-10-28 09:05:01,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:01,221 INFO L93 Difference]: Finished difference Result 323 states and 340 transitions. [2020-10-28 09:05:01,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-28 09:05:01,222 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 169 [2020-10-28 09:05:01,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:01,224 INFO L225 Difference]: With dead ends: 323 [2020-10-28 09:05:01,224 INFO L226 Difference]: Without dead ends: 180 [2020-10-28 09:05:01,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-28 09:05:01,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-28 09:05:01,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2020-10-28 09:05:01,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 180 states. [2020-10-28 09:05:01,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 186 transitions. [2020-10-28 09:05:01,235 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 186 transitions. Word has length 169 [2020-10-28 09:05:01,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:01,235 INFO L481 AbstractCegarLoop]: Abstraction has 180 states and 186 transitions. [2020-10-28 09:05:01,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-28 09:05:01,235 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 186 transitions. [2020-10-28 09:05:01,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2020-10-28 09:05:01,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:01,236 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 1, 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 09:05:01,236 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-28 09:05:01,237 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:01,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:01,237 INFO L82 PathProgramCache]: Analyzing trace with hash 654445135, now seen corresponding path program 25 times [2020-10-28 09:05:01,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:01,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1451571177] [2020-10-28 09:05:01,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:01,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:01,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:01,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:01,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:06,308 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:06,308 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-28 09:05:06,309 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:06,309 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-28 09:05:06,309 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:06,309 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:06,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-28 09:05:06,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 38 [2020-10-28 09:05:06,309 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-28 09:05:06,309 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:07,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:07,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:07,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:07,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:07,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:07,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:07,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-28 09:05:07,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:07,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:07,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:07,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:07,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:07,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:07,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1950 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1625 trivial. 0 not checked. [2020-10-28 09:05:07,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1451571177] [2020-10-28 09:05:07,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:07,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-28 09:05:07,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553203940] [2020-10-28 09:05:07,406 INFO L461 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-28 09:05:07,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:07,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-28 09:05:07,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:05:07,407 INFO L87 Difference]: Start difference. First operand 180 states and 186 transitions. Second operand 29 states. [2020-10-28 09:05:08,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:08,314 INFO L93 Difference]: Finished difference Result 334 states and 351 transitions. [2020-10-28 09:05:08,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-28 09:05:08,315 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 175 [2020-10-28 09:05:08,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:08,316 INFO L225 Difference]: With dead ends: 334 [2020-10-28 09:05:08,317 INFO L226 Difference]: Without dead ends: 186 [2020-10-28 09:05:08,318 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-28 09:05:08,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-28 09:05:08,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2020-10-28 09:05:08,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-28 09:05:08,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 192 transitions. [2020-10-28 09:05:08,327 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 192 transitions. Word has length 175 [2020-10-28 09:05:08,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:08,327 INFO L481 AbstractCegarLoop]: Abstraction has 186 states and 192 transitions. [2020-10-28 09:05:08,328 INFO L482 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-28 09:05:08,328 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 192 transitions. [2020-10-28 09:05:08,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-28 09:05:08,329 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:08,329 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 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 09:05:08,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-28 09:05:08,329 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:08,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:08,330 INFO L82 PathProgramCache]: Analyzing trace with hash -13401262, now seen corresponding path program 26 times [2020-10-28 09:05:08,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:08,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089667348] [2020-10-28 09:05:08,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:08,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:08,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:08,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:08,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:13,393 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:13,393 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 191 [2020-10-28 09:05:13,393 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:13,393 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-28 09:05:13,394 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:13,394 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-28 09:05:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 95 [2020-10-28 09:05:13,394 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-28 09:05:13,394 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:14,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:14,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:14,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:14,443 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:14,443 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:14,443 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:14,444 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:14,444 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:14,444 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:14,444 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:14,471 INFO L134 CoverageAnalysis]: Checked inductivity of 2106 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1755 trivial. 0 not checked. [2020-10-28 09:05:14,471 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089667348] [2020-10-28 09:05:14,471 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:14,472 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-28 09:05:14,472 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513873818] [2020-10-28 09:05:14,472 INFO L461 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-28 09:05:14,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:14,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-28 09:05:14,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:05:14,475 INFO L87 Difference]: Start difference. First operand 186 states and 192 transitions. Second operand 30 states. [2020-10-28 09:05:15,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:15,403 INFO L93 Difference]: Finished difference Result 345 states and 362 transitions. [2020-10-28 09:05:15,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-28 09:05:15,404 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 181 [2020-10-28 09:05:15,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:15,405 INFO L225 Difference]: With dead ends: 345 [2020-10-28 09:05:15,405 INFO L226 Difference]: Without dead ends: 192 [2020-10-28 09:05:15,406 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-28 09:05:15,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-28 09:05:15,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2020-10-28 09:05:15,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-28 09:05:15,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 198 transitions. [2020-10-28 09:05:15,435 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 198 transitions. Word has length 181 [2020-10-28 09:05:15,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:15,435 INFO L481 AbstractCegarLoop]: Abstraction has 192 states and 198 transitions. [2020-10-28 09:05:15,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-28 09:05:15,435 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 198 transitions. [2020-10-28 09:05:15,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-28 09:05:15,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:15,437 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 1, 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 09:05:15,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-28 09:05:15,437 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:15,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:15,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1480734895, now seen corresponding path program 27 times [2020-10-28 09:05:15,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:15,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261775870] [2020-10-28 09:05:15,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:15,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:15,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:15,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:15,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:15,948 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:20,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:20,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 197 [2020-10-28 09:05:20,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:20,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5024 [2020-10-28 09:05:20,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:20,521 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:20,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-28 09:05:20,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-28 09:05:20,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-28 09:05:20,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:21,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:21,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:21,737 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:21,737 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:21,737 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:21,737 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:21,738 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:21,738 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:21,738 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:21,738 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1890 trivial. 0 not checked. [2020-10-28 09:05:21,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261775870] [2020-10-28 09:05:21,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:21,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-28 09:05:21,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100712424] [2020-10-28 09:05:21,760 INFO L461 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-28 09:05:21,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:21,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-28 09:05:21,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:05:21,761 INFO L87 Difference]: Start difference. First operand 192 states and 198 transitions. Second operand 31 states. [2020-10-28 09:05:22,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:22,739 INFO L93 Difference]: Finished difference Result 356 states and 373 transitions. [2020-10-28 09:05:22,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-28 09:05:22,740 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 187 [2020-10-28 09:05:22,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:22,742 INFO L225 Difference]: With dead ends: 356 [2020-10-28 09:05:22,742 INFO L226 Difference]: Without dead ends: 198 [2020-10-28 09:05:22,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-28 09:05:22,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-28 09:05:22,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 198. [2020-10-28 09:05:22,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-28 09:05:22,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 204 transitions. [2020-10-28 09:05:22,752 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 204 transitions. Word has length 187 [2020-10-28 09:05:22,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:22,752 INFO L481 AbstractCegarLoop]: Abstraction has 198 states and 204 transitions. [2020-10-28 09:05:22,752 INFO L482 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-28 09:05:22,753 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 204 transitions. [2020-10-28 09:05:22,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-28 09:05:22,754 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:22,754 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 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 09:05:22,754 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-28 09:05:22,754 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:22,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:22,755 INFO L82 PathProgramCache]: Analyzing trace with hash 1566968690, now seen corresponding path program 28 times [2020-10-28 09:05:22,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:22,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867973601] [2020-10-28 09:05:22,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:22,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:22,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:23,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:23,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:23,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:27,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:27,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-28 09:05:27,851 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:27,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-28 09:05:27,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:27,852 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-28 09:05:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-28 09:05:27,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-28 09:05:27,852 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:29,086 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:29,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:29,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:29,090 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:29,091 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:29,091 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:29,091 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:29,091 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:29,091 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:29,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:29,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:29,091 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:29,092 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 2436 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 2030 trivial. 0 not checked. [2020-10-28 09:05:29,111 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867973601] [2020-10-28 09:05:29,111 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:29,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-28 09:05:29,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335938381] [2020-10-28 09:05:29,112 INFO L461 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-28 09:05:29,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:29,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-28 09:05:29,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:05:29,113 INFO L87 Difference]: Start difference. First operand 198 states and 204 transitions. Second operand 32 states. [2020-10-28 09:05:30,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:30,149 INFO L93 Difference]: Finished difference Result 367 states and 384 transitions. [2020-10-28 09:05:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-28 09:05:30,150 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 193 [2020-10-28 09:05:30,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:30,152 INFO L225 Difference]: With dead ends: 367 [2020-10-28 09:05:30,152 INFO L226 Difference]: Without dead ends: 204 [2020-10-28 09:05:30,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-28 09:05:30,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-28 09:05:30,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 204. [2020-10-28 09:05:30,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 204 states. [2020-10-28 09:05:30,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 210 transitions. [2020-10-28 09:05:30,164 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 210 transitions. Word has length 193 [2020-10-28 09:05:30,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:30,165 INFO L481 AbstractCegarLoop]: Abstraction has 204 states and 210 transitions. [2020-10-28 09:05:30,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-28 09:05:30,165 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 210 transitions. [2020-10-28 09:05:30,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2020-10-28 09:05:30,166 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:30,166 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 1, 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 09:05:30,166 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-28 09:05:30,166 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:30,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:30,167 INFO L82 PathProgramCache]: Analyzing trace with hash -387551473, now seen corresponding path program 29 times [2020-10-28 09:05:30,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:30,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1041901473] [2020-10-28 09:05:30,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:30,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:30,268 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:30,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:30,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:30,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:35,236 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:35,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-28 09:05:35,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:35,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-28 09:05:35,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:35,236 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:35,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-28 09:05:35,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-28 09:05:35,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-28 09:05:35,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:36,598 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:36,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:36,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:36,604 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:36,604 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:36,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:36,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:36,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:36,604 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:36,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:36,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:36,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2610 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 2175 trivial. 0 not checked. [2020-10-28 09:05:36,635 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1041901473] [2020-10-28 09:05:36,635 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:36,635 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-28 09:05:36,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986546548] [2020-10-28 09:05:36,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-28 09:05:36,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:36,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-28 09:05:36,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:05:36,637 INFO L87 Difference]: Start difference. First operand 204 states and 210 transitions. Second operand 33 states. [2020-10-28 09:05:37,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:37,545 INFO L93 Difference]: Finished difference Result 378 states and 395 transitions. [2020-10-28 09:05:37,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-28 09:05:37,547 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 199 [2020-10-28 09:05:37,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:37,551 INFO L225 Difference]: With dead ends: 378 [2020-10-28 09:05:37,551 INFO L226 Difference]: Without dead ends: 210 [2020-10-28 09:05:37,552 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-28 09:05:37,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-28 09:05:37,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2020-10-28 09:05:37,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 210 states. [2020-10-28 09:05:37,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 216 transitions. [2020-10-28 09:05:37,561 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 216 transitions. Word has length 199 [2020-10-28 09:05:37,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:37,562 INFO L481 AbstractCegarLoop]: Abstraction has 210 states and 216 transitions. [2020-10-28 09:05:37,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-28 09:05:37,562 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 216 transitions. [2020-10-28 09:05:37,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2020-10-28 09:05:37,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:37,563 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 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 09:05:37,564 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-28 09:05:37,565 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:37,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:37,566 INFO L82 PathProgramCache]: Analyzing trace with hash -945894510, now seen corresponding path program 30 times [2020-10-28 09:05:37,566 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:37,566 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1962206069] [2020-10-28 09:05:37,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:37,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:37,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:37,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:37,980 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:38,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:42,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:42,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-28 09:05:42,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:42,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-28 09:05:42,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:42,639 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:42,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-28 09:05:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 43 [2020-10-28 09:05:42,640 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-28 09:05:42,640 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:44,075 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:44,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:44,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:44,080 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:44,081 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 2790 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 2325 trivial. 0 not checked. [2020-10-28 09:05:44,105 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1962206069] [2020-10-28 09:05:44,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:44,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-28 09:05:44,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346014687] [2020-10-28 09:05:44,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-28 09:05:44,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:44,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-28 09:05:44,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:05:44,107 INFO L87 Difference]: Start difference. First operand 210 states and 216 transitions. Second operand 34 states. [2020-10-28 09:05:45,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:45,281 INFO L93 Difference]: Finished difference Result 389 states and 406 transitions. [2020-10-28 09:05:45,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-28 09:05:45,282 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 205 [2020-10-28 09:05:45,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:45,285 INFO L225 Difference]: With dead ends: 389 [2020-10-28 09:05:45,285 INFO L226 Difference]: Without dead ends: 216 [2020-10-28 09:05:45,286 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-28 09:05:45,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-28 09:05:45,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2020-10-28 09:05:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 216 states. [2020-10-28 09:05:45,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 222 transitions. [2020-10-28 09:05:45,294 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 222 transitions. Word has length 205 [2020-10-28 09:05:45,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:45,294 INFO L481 AbstractCegarLoop]: Abstraction has 216 states and 222 transitions. [2020-10-28 09:05:45,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-28 09:05:45,294 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 222 transitions. [2020-10-28 09:05:45,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2020-10-28 09:05:45,296 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:45,296 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 1, 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 09:05:45,296 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-28 09:05:45,296 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:45,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:45,297 INFO L82 PathProgramCache]: Analyzing trace with hash 2043719023, now seen corresponding path program 31 times [2020-10-28 09:05:45,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:45,297 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767425437] [2020-10-28 09:05:45,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:45,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:45,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:45,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:45,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:46,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:50,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 221 [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5028 [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 44 [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-28 09:05:50,402 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:51,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:51,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:51,920 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:51,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:51,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:51,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:05:51,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:51,921 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:51,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:51,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:51,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:51,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:51,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2976 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 2480 trivial. 0 not checked. [2020-10-28 09:05:51,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767425437] [2020-10-28 09:05:51,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:51,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-28 09:05:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77424765] [2020-10-28 09:05:51,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-28 09:05:51,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:51,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-28 09:05:51,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:05:51,978 INFO L87 Difference]: Start difference. First operand 216 states and 222 transitions. Second operand 35 states. [2020-10-28 09:05:52,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:05:52,976 INFO L93 Difference]: Finished difference Result 400 states and 417 transitions. [2020-10-28 09:05:52,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-28 09:05:52,977 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 211 [2020-10-28 09:05:52,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:05:52,979 INFO L225 Difference]: With dead ends: 400 [2020-10-28 09:05:52,980 INFO L226 Difference]: Without dead ends: 222 [2020-10-28 09:05:52,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-28 09:05:52,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-28 09:05:52,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 222. [2020-10-28 09:05:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-28 09:05:52,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 228 transitions. [2020-10-28 09:05:52,990 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 228 transitions. Word has length 211 [2020-10-28 09:05:52,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:05:52,990 INFO L481 AbstractCegarLoop]: Abstraction has 222 states and 228 transitions. [2020-10-28 09:05:52,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-28 09:05:52,990 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 228 transitions. [2020-10-28 09:05:52,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-28 09:05:52,991 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:05:52,992 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 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 09:05:52,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-28 09:05:52,992 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:05:52,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:05:52,992 INFO L82 PathProgramCache]: Analyzing trace with hash 463193010, now seen corresponding path program 32 times [2020-10-28 09:05:52,993 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:05:52,993 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693406202] [2020-10-28 09:05:52,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:05:53,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:53,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:53,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:53,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:53,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:58,092 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:58,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 227 [2020-10-28 09:05:58,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:05:58,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5027 [2020-10-28 09:05:58,093 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:58,093 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-28 09:05:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 113 [2020-10-28 09:05:58,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-28 09:05:58,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:59,720 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:05:59,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:05:59,723 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:05:59,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:05:59,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:05:59,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:05:59,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:05:59,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:05:59,726 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:05:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:05:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:05:59,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:05:59,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:05:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3168 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2640 trivial. 0 not checked. [2020-10-28 09:05:59,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693406202] [2020-10-28 09:05:59,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:05:59,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-28 09:05:59,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926024668] [2020-10-28 09:05:59,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-28 09:05:59,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:05:59,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-28 09:05:59,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:05:59,752 INFO L87 Difference]: Start difference. First operand 222 states and 228 transitions. Second operand 36 states. [2020-10-28 09:06:00,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:00,988 INFO L93 Difference]: Finished difference Result 411 states and 428 transitions. [2020-10-28 09:06:00,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-28 09:06:00,989 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 217 [2020-10-28 09:06:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:00,991 INFO L225 Difference]: With dead ends: 411 [2020-10-28 09:06:00,992 INFO L226 Difference]: Without dead ends: 228 [2020-10-28 09:06:00,993 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-28 09:06:00,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-28 09:06:01,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 228. [2020-10-28 09:06:01,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 228 states. [2020-10-28 09:06:01,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 234 transitions. [2020-10-28 09:06:01,002 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 234 transitions. Word has length 217 [2020-10-28 09:06:01,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:01,002 INFO L481 AbstractCegarLoop]: Abstraction has 228 states and 234 transitions. [2020-10-28 09:06:01,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-28 09:06:01,002 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 234 transitions. [2020-10-28 09:06:01,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-28 09:06:01,004 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:01,004 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 1, 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 09:06:01,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-28 09:06:01,004 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:01,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:01,005 INFO L82 PathProgramCache]: Analyzing trace with hash -94178353, now seen corresponding path program 33 times [2020-10-28 09:06:01,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:01,005 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [519146587] [2020-10-28 09:06:01,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:01,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:01,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:01,348 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:01,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:01,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:06,082 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:06,082 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 233 [2020-10-28 09:06:06,082 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:06,082 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-10-28 09:06:06,082 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:06,082 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:06,082 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-28 09:06:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 116 [2020-10-28 09:06:06,083 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-28 09:06:06,083 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:07,781 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:07,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:07,784 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:07,786 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:07,787 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:07,787 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:07,787 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:07,787 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:07,787 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:07,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:07,788 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:07,788 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:07,813 INFO L134 CoverageAnalysis]: Checked inductivity of 3366 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2805 trivial. 0 not checked. [2020-10-28 09:06:07,813 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [519146587] [2020-10-28 09:06:07,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:07,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-28 09:06:07,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758368778] [2020-10-28 09:06:07,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-28 09:06:07,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:07,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-28 09:06:07,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:06:07,815 INFO L87 Difference]: Start difference. First operand 228 states and 234 transitions. Second operand 37 states. [2020-10-28 09:06:09,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:09,025 INFO L93 Difference]: Finished difference Result 422 states and 439 transitions. [2020-10-28 09:06:09,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-28 09:06:09,026 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 223 [2020-10-28 09:06:09,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:09,028 INFO L225 Difference]: With dead ends: 422 [2020-10-28 09:06:09,028 INFO L226 Difference]: Without dead ends: 234 [2020-10-28 09:06:09,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-28 09:06:09,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-28 09:06:09,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 234. [2020-10-28 09:06:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 234 states. [2020-10-28 09:06:09,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 234 states to 234 states and 240 transitions. [2020-10-28 09:06:09,037 INFO L78 Accepts]: Start accepts. Automaton has 234 states and 240 transitions. Word has length 223 [2020-10-28 09:06:09,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:09,038 INFO L481 AbstractCegarLoop]: Abstraction has 234 states and 240 transitions. [2020-10-28 09:06:09,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-28 09:06:09,038 INFO L276 IsEmpty]: Start isEmpty. Operand 234 states and 240 transitions. [2020-10-28 09:06:09,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2020-10-28 09:06:09,039 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:09,039 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 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 09:06:09,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-28 09:06:09,040 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:09,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:09,040 INFO L82 PathProgramCache]: Analyzing trace with hash -392498222, now seen corresponding path program 34 times [2020-10-28 09:06:09,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:09,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [853716856] [2020-10-28 09:06:09,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:09,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:09,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:09,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:09,652 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:09,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:14,109 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:14,109 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 239 [2020-10-28 09:06:14,109 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:14,109 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-28 09:06:14,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:14,109 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-28 09:06:14,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 47 [2020-10-28 09:06:14,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-28 09:06:14,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:15,814 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:15,816 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:15,818 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:15,819 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:15,891 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2975 trivial. 0 not checked. [2020-10-28 09:06:15,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [853716856] [2020-10-28 09:06:15,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:15,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-28 09:06:15,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041819112] [2020-10-28 09:06:15,893 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-28 09:06:15,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:15,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-28 09:06:15,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:06:15,894 INFO L87 Difference]: Start difference. First operand 234 states and 240 transitions. Second operand 38 states. [2020-10-28 09:06:16,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-28 09:06:16,952 INFO L93 Difference]: Finished difference Result 433 states and 450 transitions. [2020-10-28 09:06:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-28 09:06:16,953 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 229 [2020-10-28 09:06:16,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-28 09:06:16,955 INFO L225 Difference]: With dead ends: 433 [2020-10-28 09:06:16,955 INFO L226 Difference]: Without dead ends: 240 [2020-10-28 09:06:16,956 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-28 09:06:16,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2020-10-28 09:06:16,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2020-10-28 09:06:16,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 240 states. [2020-10-28 09:06:16,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 246 transitions. [2020-10-28 09:06:16,966 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 246 transitions. Word has length 229 [2020-10-28 09:06:16,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-28 09:06:16,967 INFO L481 AbstractCegarLoop]: Abstraction has 240 states and 246 transitions. [2020-10-28 09:06:16,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-28 09:06:16,967 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 246 transitions. [2020-10-28 09:06:16,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2020-10-28 09:06:16,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-28 09:06:16,969 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 1, 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 09:06:16,969 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-28 09:06:16,969 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-28 09:06:16,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-28 09:06:16,970 INFO L82 PathProgramCache]: Analyzing trace with hash -931184081, now seen corresponding path program 35 times [2020-10-28 09:06:16,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-28 09:06:16,970 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [880842564] [2020-10-28 09:06:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-28 09:06:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:17,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:17,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:17,715 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:17,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:22,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5045 [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 48 [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-28 09:06:22,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:23,911 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-28 09:06:23,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-28 09:06:23,914 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Heuristic: WIDESTAMONGSMALL [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.6 [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-28 09:06:23,916 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-28 09:06:23,917 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-28 09:06:23,946 INFO L134 CoverageAnalysis]: Checked inductivity of 3780 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 3150 trivial. 0 not checked. [2020-10-28 09:06:23,947 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [880842564] [2020-10-28 09:06:23,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-28 09:06:23,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-28 09:06:23,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772831672] [2020-10-28 09:06:23,948 INFO L461 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-28 09:06:23,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-28 09:06:23,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-28 09:06:23,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-28 09:06:23,949 INFO L87 Difference]: Start difference. First operand 240 states and 246 transitions. Second operand 39 states.