/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=SMALLESTAMONGWIDE --traceabstraction.additional.smt.options tolerance=0.3 --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/locks/test_locks_15-2.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-29 09:33:12,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-29 09:33:12,606 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-29 09:33:12,668 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-29 09:33:12,669 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-29 09:33:12,675 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-29 09:33:12,678 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-29 09:33:12,682 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-29 09:33:12,685 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-29 09:33:12,692 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-29 09:33:12,694 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-29 09:33:12,695 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-29 09:33:12,696 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-29 09:33:12,700 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-29 09:33:12,702 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-29 09:33:12,704 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-29 09:33:12,706 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-29 09:33:12,709 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-29 09:33:12,730 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-29 09:33:12,738 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-29 09:33:12,740 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-29 09:33:12,742 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-29 09:33:12,743 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-29 09:33:12,746 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-29 09:33:12,755 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-29 09:33:12,756 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-29 09:33:12,756 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-29 09:33:12,759 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-29 09:33:12,760 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-29 09:33:12,761 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-29 09:33:12,762 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-29 09:33:12,763 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-29 09:33:12,765 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-29 09:33:12,766 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-29 09:33:12,767 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-29 09:33:12,768 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-29 09:33:12,769 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-29 09:33:12,769 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-29 09:33:12,769 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-29 09:33:12,770 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-29 09:33:12,771 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-29 09:33:12,778 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 [2020-10-29 09:33:12,825 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-29 09:33:12,826 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-29 09:33:12,830 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-29 09:33:12,831 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-29 09:33:12,831 INFO L138 SettingsManager]: * Use SBE=true [2020-10-29 09:33:12,831 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-29 09:33:12,831 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-29 09:33:12,832 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-29 09:33:12,832 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-29 09:33:12,832 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-29 09:33:12,833 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-29 09:33:12,833 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-29 09:33:12,833 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-29 09:33:12,834 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-29 09:33:12,834 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-29 09:33:12,834 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-29 09:33:12,834 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-29 09:33:12,834 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-29 09:33:12,835 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-29 09:33:12,835 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-29 09:33:12,835 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-29 09:33:12,835 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-29 09:33:12,835 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-29 09:33:12,836 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-29 09:33:12,836 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-29 09:33:12,836 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-29 09:33:12,836 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-29 09:33:12,836 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-29 09:33:12,837 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-29 09:33:12,837 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SMALLESTAMONGWIDE;tolerance=0.3;log-additional-information=true;unknown-allowed=true; [2020-10-29 09:33:13,297 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-29 09:33:13,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-29 09:33:13,329 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-29 09:33:13,330 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-29 09:33:13,331 INFO L275 PluginConnector]: CDTParser initialized [2020-10-29 09:33:13,332 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/locks/test_locks_15-2.c [2020-10-29 09:33:13,411 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d18cac4f5/670ff5a3cd8242dc85d8968246b8d3dc/FLAG2497cfe6e [2020-10-29 09:33:14,108 INFO L306 CDTParser]: Found 1 translation units. [2020-10-29 09:33:14,109 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/locks/test_locks_15-2.c [2020-10-29 09:33:14,122 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d18cac4f5/670ff5a3cd8242dc85d8968246b8d3dc/FLAG2497cfe6e [2020-10-29 09:33:14,438 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/d18cac4f5/670ff5a3cd8242dc85d8968246b8d3dc [2020-10-29 09:33:14,442 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-29 09:33:14,448 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-29 09:33:14,450 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:14,450 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-29 09:33:14,455 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-29 09:33:14,456 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,462 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@32febb60 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14, skipping insertion in model container [2020-10-29 09:33:14,463 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,471 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-29 09:33:14,509 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-29 09:33:14,737 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:14,749 INFO L203 MainTranslator]: Completed pre-run [2020-10-29 09:33:14,788 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-29 09:33:14,810 INFO L208 MainTranslator]: Completed translation [2020-10-29 09:33:14,810 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14 WrapperNode [2020-10-29 09:33:14,811 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-29 09:33:14,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-29 09:33:14,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-29 09:33:14,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-29 09:33:14,827 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,827 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,836 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,837 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,847 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,855 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,861 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (1/1) ... [2020-10-29 09:33:14,865 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-29 09:33:14,870 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-29 09:33:14,871 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-29 09:33:14,871 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-29 09:33:14,872 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (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 [2020-10-29 09:33:14,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-29 09:33:14,965 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-29 09:33:14,966 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-29 09:33:14,966 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-29 09:33:14,967 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-29 09:33:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-29 09:33:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-29 09:33:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-29 09:33:14,968 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-29 09:33:14,969 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-29 09:33:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-29 09:33:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-29 09:33:14,970 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-29 09:33:14,971 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-29 09:33:14,971 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-29 09:33:14,972 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-29 09:33:15,581 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-29 09:33:15,582 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-29 09:33:15,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:15 BoogieIcfgContainer [2020-10-29 09:33:15,584 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-29 09:33:15,586 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-29 09:33:15,586 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-29 09:33:15,590 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-29 09:33:15,590 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.10 09:33:14" (1/3) ... [2020-10-29 09:33:15,591 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de17d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:15, skipping insertion in model container [2020-10-29 09:33:15,591 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.10 09:33:14" (2/3) ... [2020-10-29 09:33:15,592 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7de17d9f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.10 09:33:15, skipping insertion in model container [2020-10-29 09:33:15,592 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.10 09:33:15" (3/3) ... [2020-10-29 09:33:15,594 INFO L111 eAbstractionObserver]: Analyzing ICFG test_locks_15-2.c [2020-10-29 09:33:15,606 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-29 09:33:15,612 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-29 09:33:15,626 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-29 09:33:15,655 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-29 09:33:15,655 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-29 09:33:15,655 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-29 09:33:15,656 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-29 09:33:15,656 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-29 09:33:15,656 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-29 09:33:15,656 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-29 09:33:15,656 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-29 09:33:15,675 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states. [2020-10-29 09:33:15,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:33:15,682 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:15,683 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:15,684 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1271024494, now seen corresponding path program 1 times [2020-10-29 09:33:15,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:15,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1865480060] [2020-10-29 09:33:15,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:15,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:16,224 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:16,224 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:33:16,224 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:16,224 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-10-29 09:33:16,227 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:16,227 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:16,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:16,227 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:16,228 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:16,228 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-29 09:33:16,331 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:16,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:16,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:16,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:16,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:16,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 12 [2020-10-29 09:33:16,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:16,350 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:16,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:16,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:16,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:16,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:16,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1865480060] [2020-10-29 09:33:16,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:16,369 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:16,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058101020] [2020-10-29 09:33:16,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:16,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:16,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:16,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:16,394 INFO L87 Difference]: Start difference. First operand 64 states. Second operand 4 states. [2020-10-29 09:33:16,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:16,789 INFO L93 Difference]: Finished difference Result 122 states and 217 transitions. [2020-10-29 09:33:16,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:16,792 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:33:16,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:16,806 INFO L225 Difference]: With dead ends: 122 [2020-10-29 09:33:16,807 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:33:16,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:16,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:33:16,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 72. [2020-10-29 09:33:16,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-29 09:33:16,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 131 transitions. [2020-10-29 09:33:16,872 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 131 transitions. Word has length 27 [2020-10-29 09:33:16,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:16,873 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 131 transitions. [2020-10-29 09:33:16,873 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:16,873 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 131 transitions. [2020-10-29 09:33:16,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-29 09:33:16,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:16,876 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:16,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-29 09:33:16,877 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:16,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:16,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1334999060, now seen corresponding path program 1 times [2020-10-29 09:33:16,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:16,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059542811] [2020-10-29 09:33:16,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:16,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:16,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:17,116 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:17,117 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-29 09:33:17,117 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:17,117 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 162 [2020-10-29 09:33:17,117 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:17,118 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:17,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:17,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:17,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:17,118 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:17,184 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:17,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:17,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:17,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:17,197 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:17,197 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:17,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-29 09:33:17,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:17,198 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:17,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:17,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:17,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:17,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059542811] [2020-10-29 09:33:17,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:17,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:17,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099384303] [2020-10-29 09:33:17,209 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:17,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:17,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:17,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:17,211 INFO L87 Difference]: Start difference. First operand 72 states and 131 transitions. Second operand 4 states. [2020-10-29 09:33:17,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:17,496 INFO L93 Difference]: Finished difference Result 169 states and 315 transitions. [2020-10-29 09:33:17,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:17,497 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-29 09:33:17,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:17,499 INFO L225 Difference]: With dead ends: 169 [2020-10-29 09:33:17,499 INFO L226 Difference]: Without dead ends: 103 [2020-10-29 09:33:17,501 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:17,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-29 09:33:17,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-29 09:33:17,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-29 09:33:17,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 187 transitions. [2020-10-29 09:33:17,516 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 187 transitions. Word has length 27 [2020-10-29 09:33:17,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:17,516 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 187 transitions. [2020-10-29 09:33:17,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:17,517 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 187 transitions. [2020-10-29 09:33:17,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:33:17,518 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:17,518 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] [2020-10-29 09:33:17,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-29 09:33:17,518 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:17,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:17,519 INFO L82 PathProgramCache]: Analyzing trace with hash -740495476, now seen corresponding path program 1 times [2020-10-29 09:33:17,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:17,520 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1405386234] [2020-10-29 09:33:17,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:17,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:17,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:17,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:17,740 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:17,740 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:33:17,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:17,741 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 193 [2020-10-29 09:33:17,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:17,742 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:17,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:33:17,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:17,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:17,799 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:17,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:17,803 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:17,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:17,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:17,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:17,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:17,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:17,809 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:17,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:17,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:17,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:17,815 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:17,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1405386234] [2020-10-29 09:33:17,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:17,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:17,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886357046] [2020-10-29 09:33:17,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:17,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:17,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:17,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:17,819 INFO L87 Difference]: Start difference. First operand 102 states and 187 transitions. Second operand 4 states. [2020-10-29 09:33:18,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:18,111 INFO L93 Difference]: Finished difference Result 290 states and 544 transitions. [2020-10-29 09:33:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:18,112 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:33:18,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:18,114 INFO L225 Difference]: With dead ends: 290 [2020-10-29 09:33:18,114 INFO L226 Difference]: Without dead ends: 194 [2020-10-29 09:33:18,115 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:18,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-29 09:33:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2020-10-29 09:33:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-29 09:33:18,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 358 transitions. [2020-10-29 09:33:18,134 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 358 transitions. Word has length 28 [2020-10-29 09:33:18,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:18,134 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 358 transitions. [2020-10-29 09:33:18,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:18,135 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 358 transitions. [2020-10-29 09:33:18,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-29 09:33:18,136 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:18,136 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] [2020-10-29 09:33:18,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-29 09:33:18,137 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:18,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:18,138 INFO L82 PathProgramCache]: Analyzing trace with hash 948448266, now seen corresponding path program 1 times [2020-10-29 09:33:18,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:18,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [837758052] [2020-10-29 09:33:18,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:18,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:18,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:18,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:18,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-29 09:33:18,304 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:18,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-29 09:33:18,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:18,304 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:18,305 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 15 [2020-10-29 09:33:18,308 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:18,308 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-29 09:33:18,386 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:18,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:18,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:18,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:18,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:18,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:18,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:33:18,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:18,398 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:18,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:18,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:18,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:18,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:33:18,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:18,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [837758052] [2020-10-29 09:33:18,411 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:18,411 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:18,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204450651] [2020-10-29 09:33:18,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:18,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:18,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:18,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:18,422 INFO L87 Difference]: Start difference. First operand 193 states and 358 transitions. Second operand 4 states. [2020-10-29 09:33:18,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:18,686 INFO L93 Difference]: Finished difference Result 253 states and 469 transitions. [2020-10-29 09:33:18,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:18,687 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 28 [2020-10-29 09:33:18,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:18,689 INFO L225 Difference]: With dead ends: 253 [2020-10-29 09:33:18,690 INFO L226 Difference]: Without dead ends: 250 [2020-10-29 09:33:18,690 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:18,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-29 09:33:18,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 193. [2020-10-29 09:33:18,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 193 states. [2020-10-29 09:33:18,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 356 transitions. [2020-10-29 09:33:18,706 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 356 transitions. Word has length 28 [2020-10-29 09:33:18,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:18,707 INFO L481 AbstractCegarLoop]: Abstraction has 193 states and 356 transitions. [2020-10-29 09:33:18,707 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:18,707 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 356 transitions. [2020-10-29 09:33:18,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:33:18,709 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:18,709 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:18,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-29 09:33:18,709 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:18,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:18,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1473954531, now seen corresponding path program 1 times [2020-10-29 09:33:18,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:18,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [336780831] [2020-10-29 09:33:18,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:18,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:18,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:18,750 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:18,876 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:18,876 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:33:18,876 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:18,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 146 [2020-10-29 09:33:18,877 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:18,877 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:18,877 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:18,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:18,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:18,924 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:18,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:18,932 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:18,932 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:18,932 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:18,932 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:18,932 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:18,933 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:18,933 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:18,933 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:18,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:18,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [336780831] [2020-10-29 09:33:18,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:18,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:18,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824684213] [2020-10-29 09:33:18,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:18,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:18,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:18,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:18,941 INFO L87 Difference]: Start difference. First operand 193 states and 356 transitions. Second operand 4 states. [2020-10-29 09:33:19,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:19,182 INFO L93 Difference]: Finished difference Result 369 states and 687 transitions. [2020-10-29 09:33:19,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:19,182 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:33:19,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:19,185 INFO L225 Difference]: With dead ends: 369 [2020-10-29 09:33:19,185 INFO L226 Difference]: Without dead ends: 366 [2020-10-29 09:33:19,186 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:19,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 366 states. [2020-10-29 09:33:19,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 366 to 261. [2020-10-29 09:33:19,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 261 states. [2020-10-29 09:33:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 480 transitions. [2020-10-29 09:33:19,202 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 480 transitions. Word has length 29 [2020-10-29 09:33:19,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:19,202 INFO L481 AbstractCegarLoop]: Abstraction has 261 states and 480 transitions. [2020-10-29 09:33:19,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:19,203 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 480 transitions. [2020-10-29 09:33:19,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-29 09:33:19,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:19,205 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:19,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-29 09:33:19,205 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:19,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:19,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1132069023, now seen corresponding path program 1 times [2020-10-29 09:33:19,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:19,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1637116386] [2020-10-29 09:33:19,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:19,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:19,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:19,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:19,352 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:19,352 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 37 [2020-10-29 09:33:19,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:19,353 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 128 [2020-10-29 09:33:19,353 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:19,354 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:19,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:19,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:19,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:19,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:19,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:19,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:19,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:19,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:19,418 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:19,418 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:19,419 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:19,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:19,420 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:19,424 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:19,424 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-29 09:33:19,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:19,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1637116386] [2020-10-29 09:33:19,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:19,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:19,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847264727] [2020-10-29 09:33:19,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:19,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:19,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:19,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:19,435 INFO L87 Difference]: Start difference. First operand 261 states and 480 transitions. Second operand 4 states. [2020-10-29 09:33:19,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:19,709 INFO L93 Difference]: Finished difference Result 629 states and 1167 transitions. [2020-10-29 09:33:19,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:19,710 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-29 09:33:19,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:19,713 INFO L225 Difference]: With dead ends: 629 [2020-10-29 09:33:19,713 INFO L226 Difference]: Without dead ends: 374 [2020-10-29 09:33:19,717 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:19,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2020-10-29 09:33:19,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 373. [2020-10-29 09:33:19,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 373 states. [2020-10-29 09:33:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 684 transitions. [2020-10-29 09:33:19,734 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 684 transitions. Word has length 29 [2020-10-29 09:33:19,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:19,736 INFO L481 AbstractCegarLoop]: Abstraction has 373 states and 684 transitions. [2020-10-29 09:33:19,736 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:19,736 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 684 transitions. [2020-10-29 09:33:19,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:33:19,745 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:19,746 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:19,746 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-29 09:33:19,746 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:19,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:19,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1558629111, now seen corresponding path program 1 times [2020-10-29 09:33:19,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:19,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [706235760] [2020-10-29 09:33:19,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:19,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:19,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:19,801 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:19,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:33:20,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:20,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-10-29 09:33:20,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,061 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 14 [2020-10-29 09:33:20,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:20,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:20,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:20,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,114 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:20,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:20,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:20,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,115 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:20,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:20,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:20,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:20,122 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [706235760] [2020-10-29 09:33:20,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:20,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:20,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679498292] [2020-10-29 09:33:20,123 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:20,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:20,124 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:20,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:20,125 INFO L87 Difference]: Start difference. First operand 373 states and 684 transitions. Second operand 4 states. [2020-10-29 09:33:20,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:20,371 INFO L93 Difference]: Finished difference Result 560 states and 1023 transitions. [2020-10-29 09:33:20,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:20,371 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:33:20,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:20,374 INFO L225 Difference]: With dead ends: 560 [2020-10-29 09:33:20,374 INFO L226 Difference]: Without dead ends: 377 [2020-10-29 09:33:20,375 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:20,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2020-10-29 09:33:20,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 376. [2020-10-29 09:33:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 376 states. [2020-10-29 09:33:20,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 680 transitions. [2020-10-29 09:33:20,392 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 680 transitions. Word has length 30 [2020-10-29 09:33:20,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:20,392 INFO L481 AbstractCegarLoop]: Abstraction has 376 states and 680 transitions. [2020-10-29 09:33:20,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 680 transitions. [2020-10-29 09:33:20,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:33:20,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:20,394 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:20,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-29 09:33:20,394 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:20,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:20,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1777483829, now seen corresponding path program 1 times [2020-10-29 09:33:20,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:20,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2120587730] [2020-10-29 09:33:20,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:20,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,416 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,540 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,541 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:33:20,541 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:20,541 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 131 [2020-10-29 09:33:20,541 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,541 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 16 [2020-10-29 09:33:20,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:20,542 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:20,589 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:20,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,596 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:20,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:20,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:20,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,597 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:20,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:20,598 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:20,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:20,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2120587730] [2020-10-29 09:33:20,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:20,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:20,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366102790] [2020-10-29 09:33:20,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:20,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:20,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:20,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:20,606 INFO L87 Difference]: Start difference. First operand 376 states and 680 transitions. Second operand 4 states. [2020-10-29 09:33:20,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:20,819 INFO L93 Difference]: Finished difference Result 566 states and 1023 transitions. [2020-10-29 09:33:20,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:20,820 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:33:20,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:20,822 INFO L225 Difference]: With dead ends: 566 [2020-10-29 09:33:20,823 INFO L226 Difference]: Without dead ends: 383 [2020-10-29 09:33:20,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:20,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2020-10-29 09:33:20,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 382. [2020-10-29 09:33:20,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 382 states. [2020-10-29 09:33:20,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 684 transitions. [2020-10-29 09:33:20,837 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 684 transitions. Word has length 30 [2020-10-29 09:33:20,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:20,837 INFO L481 AbstractCegarLoop]: Abstraction has 382 states and 684 transitions. [2020-10-29 09:33:20,837 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:20,838 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 684 transitions. [2020-10-29 09:33:20,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:33:20,838 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:20,839 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:20,839 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-29 09:33:20,839 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:20,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:20,839 INFO L82 PathProgramCache]: Analyzing trace with hash 959835379, now seen corresponding path program 1 times [2020-10-29 09:33:20,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:20,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033579417] [2020-10-29 09:33:20,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:20,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:33:20,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:20,891 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 40 [2020-10-29 09:33:20,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,892 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:20,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:20,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:20,932 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:20,936 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:20,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:20,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:20,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:20,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:20,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:20,940 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:20,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:20,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:20,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:20,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033579417] [2020-10-29 09:33:20,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:20,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:20,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891225422] [2020-10-29 09:33:20,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:20,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:20,947 INFO L87 Difference]: Start difference. First operand 382 states and 684 transitions. Second operand 4 states. [2020-10-29 09:33:21,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:21,243 INFO L93 Difference]: Finished difference Result 718 states and 1303 transitions. [2020-10-29 09:33:21,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:21,244 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:33:21,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:21,248 INFO L225 Difference]: With dead ends: 718 [2020-10-29 09:33:21,248 INFO L226 Difference]: Without dead ends: 715 [2020-10-29 09:33:21,249 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:21,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2020-10-29 09:33:21,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 522. [2020-10-29 09:33:21,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 522 states. [2020-10-29 09:33:21,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 522 states to 522 states and 924 transitions. [2020-10-29 09:33:21,286 INFO L78 Accepts]: Start accepts. Automaton has 522 states and 924 transitions. Word has length 30 [2020-10-29 09:33:21,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:21,287 INFO L481 AbstractCegarLoop]: Abstraction has 522 states and 924 transitions. [2020-10-29 09:33:21,287 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:21,287 INFO L276 IsEmpty]: Start isEmpty. Operand 522 states and 924 transitions. [2020-10-29 09:33:21,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-29 09:33:21,288 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:21,289 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:21,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-29 09:33:21,289 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:21,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:21,290 INFO L82 PathProgramCache]: Analyzing trace with hash -729108363, now seen corresponding path program 1 times [2020-10-29 09:33:21,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:21,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552161911] [2020-10-29 09:33:21,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,362 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-29 09:33:21,362 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:21,362 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 51 [2020-10-29 09:33:21,362 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,362 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:21,363 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:21,363 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:21,408 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,411 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,414 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,414 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:21,414 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:21,414 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:21,414 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,415 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:21,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:21,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:21,415 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:21,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:21,421 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552161911] [2020-10-29 09:33:21,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:21,421 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:21,421 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959509543] [2020-10-29 09:33:21,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:21,422 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:21,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:21,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:21,423 INFO L87 Difference]: Start difference. First operand 522 states and 924 transitions. Second operand 4 states. [2020-10-29 09:33:21,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:21,680 INFO L93 Difference]: Finished difference Result 1246 states and 2223 transitions. [2020-10-29 09:33:21,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:21,680 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 30 [2020-10-29 09:33:21,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:21,686 INFO L225 Difference]: With dead ends: 1246 [2020-10-29 09:33:21,686 INFO L226 Difference]: Without dead ends: 739 [2020-10-29 09:33:21,688 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:21,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2020-10-29 09:33:21,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 738. [2020-10-29 09:33:21,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 738 states. [2020-10-29 09:33:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 738 states to 738 states and 1304 transitions. [2020-10-29 09:33:21,715 INFO L78 Accepts]: Start accepts. Automaton has 738 states and 1304 transitions. Word has length 30 [2020-10-29 09:33:21,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:21,715 INFO L481 AbstractCegarLoop]: Abstraction has 738 states and 1304 transitions. [2020-10-29 09:33:21,716 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 738 states and 1304 transitions. [2020-10-29 09:33:21,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:33:21,717 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:21,717 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:21,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-29 09:33:21,717 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:21,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:21,718 INFO L82 PathProgramCache]: Analyzing trace with hash -303284436, now seen corresponding path program 1 times [2020-10-29 09:33:21,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:21,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [765611788] [2020-10-29 09:33:21,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:21,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,836 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:33:21,836 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:21,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-29 09:33:21,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,836 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:21,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:21,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:21,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:21,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:21,884 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:21,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:21,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:21,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:21,885 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:21,885 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:21,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:21,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:21,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:21,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:21,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [765611788] [2020-10-29 09:33:21,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:21,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:21,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099948750] [2020-10-29 09:33:21,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:21,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:21,892 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:21,892 INFO L87 Difference]: Start difference. First operand 738 states and 1304 transitions. Second operand 4 states. [2020-10-29 09:33:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:22,178 INFO L93 Difference]: Finished difference Result 1382 states and 2475 transitions. [2020-10-29 09:33:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:22,178 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-29 09:33:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:22,186 INFO L225 Difference]: With dead ends: 1382 [2020-10-29 09:33:22,186 INFO L226 Difference]: Without dead ends: 1379 [2020-10-29 09:33:22,187 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:22,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1379 states. [2020-10-29 09:33:22,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1379 to 1026. [2020-10-29 09:33:22,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1026 states. [2020-10-29 09:33:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1784 transitions. [2020-10-29 09:33:22,222 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1784 transitions. Word has length 31 [2020-10-29 09:33:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:22,222 INFO L481 AbstractCegarLoop]: Abstraction has 1026 states and 1784 transitions. [2020-10-29 09:33:22,223 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:22,223 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1784 transitions. [2020-10-29 09:33:22,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-29 09:33:22,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:22,225 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] [2020-10-29 09:33:22,225 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-29 09:33:22,226 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:22,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:22,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1992228178, now seen corresponding path program 1 times [2020-10-29 09:33:22,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:22,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832915930] [2020-10-29 09:33:22,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:22,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,256 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,327 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,327 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-29 09:33:22,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:22,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-29 09:33:22,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,328 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:22,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:22,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:22,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:22,367 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:22,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:22,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:22,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:22,375 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,375 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:22,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:22,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:22,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832915930] [2020-10-29 09:33:22,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:22,381 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:22,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315444953] [2020-10-29 09:33:22,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:22,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:22,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:22,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:22,382 INFO L87 Difference]: Start difference. First operand 1026 states and 1784 transitions. Second operand 4 states. [2020-10-29 09:33:22,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:22,651 INFO L93 Difference]: Finished difference Result 2454 states and 4299 transitions. [2020-10-29 09:33:22,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:22,651 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 31 [2020-10-29 09:33:22,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:22,659 INFO L225 Difference]: With dead ends: 2454 [2020-10-29 09:33:22,659 INFO L226 Difference]: Without dead ends: 1443 [2020-10-29 09:33:22,662 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:22,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1443 states. [2020-10-29 09:33:22,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1443 to 1442. [2020-10-29 09:33:22,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1442 states. [2020-10-29 09:33:22,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1442 states to 1442 states and 2504 transitions. [2020-10-29 09:33:22,711 INFO L78 Accepts]: Start accepts. Automaton has 1442 states and 2504 transitions. Word has length 31 [2020-10-29 09:33:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:22,713 INFO L481 AbstractCegarLoop]: Abstraction has 1442 states and 2504 transitions. [2020-10-29 09:33:22,713 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:22,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1442 states and 2504 transitions. [2020-10-29 09:33:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:33:22,715 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:22,716 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:22,716 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-29 09:33:22,716 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:22,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:22,716 INFO L82 PathProgramCache]: Analyzing trace with hash -805282466, now seen corresponding path program 1 times [2020-10-29 09:33:22,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:22,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2127638561] [2020-10-29 09:33:22,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:22,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:22,734 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,745 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:22,948 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:22,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:33:22,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:22,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 219 [2020-10-29 09:33:22,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:22,949 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:22,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:22,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 17 [2020-10-29 09:33:22,949 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:22,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,006 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:23,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,012 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,013 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:23,013 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:23,013 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:23,013 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,013 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:23,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:23,014 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:23,014 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:23,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2127638561] [2020-10-29 09:33:23,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:23,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:23,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209024725] [2020-10-29 09:33:23,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:23,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:23,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:23,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:23,022 INFO L87 Difference]: Start difference. First operand 1442 states and 2504 transitions. Second operand 4 states. [2020-10-29 09:33:23,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:23,255 INFO L93 Difference]: Finished difference Result 2158 states and 3739 transitions. [2020-10-29 09:33:23,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:23,255 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:33:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:23,266 INFO L225 Difference]: With dead ends: 2158 [2020-10-29 09:33:23,266 INFO L226 Difference]: Without dead ends: 1451 [2020-10-29 09:33:23,271 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:23,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2020-10-29 09:33:23,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 1450. [2020-10-29 09:33:23,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1450 states. [2020-10-29 09:33:23,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1450 states to 1450 states and 2488 transitions. [2020-10-29 09:33:23,338 INFO L78 Accepts]: Start accepts. Automaton has 1450 states and 2488 transitions. Word has length 32 [2020-10-29 09:33:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:23,339 INFO L481 AbstractCegarLoop]: Abstraction has 1450 states and 2488 transitions. [2020-10-29 09:33:23,339 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:23,339 INFO L276 IsEmpty]: Start isEmpty. Operand 1450 states and 2488 transitions. [2020-10-29 09:33:23,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:33:23,341 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:23,341 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:23,341 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-29 09:33:23,341 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:23,342 INFO L82 PathProgramCache]: Analyzing trace with hash -382580640, now seen corresponding path program 1 times [2020-10-29 09:33:23,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:23,347 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [740272619] [2020-10-29 09:33:23,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:23,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,461 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,461 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:33:23,462 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:23,462 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-29 09:33:23,462 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,462 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,462 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-29 09:33:23,463 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:23,463 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,499 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:23,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,506 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,506 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:23,506 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:23,506 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:23,506 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,507 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:23,507 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:23,507 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:23,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [740272619] [2020-10-29 09:33:23,514 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:23,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:23,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306842212] [2020-10-29 09:33:23,515 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:23,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:23,516 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:23,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:23,516 INFO L87 Difference]: Start difference. First operand 1450 states and 2488 transitions. Second operand 4 states. [2020-10-29 09:33:23,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:23,806 INFO L93 Difference]: Finished difference Result 2174 states and 3723 transitions. [2020-10-29 09:33:23,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:23,807 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:33:23,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:23,816 INFO L225 Difference]: With dead ends: 2174 [2020-10-29 09:33:23,816 INFO L226 Difference]: Without dead ends: 1467 [2020-10-29 09:33:23,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:23,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1467 states. [2020-10-29 09:33:23,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1467 to 1466. [2020-10-29 09:33:23,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1466 states. [2020-10-29 09:33:23,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1466 states to 1466 states and 2488 transitions. [2020-10-29 09:33:23,885 INFO L78 Accepts]: Start accepts. Automaton has 1466 states and 2488 transitions. Word has length 32 [2020-10-29 09:33:23,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:23,886 INFO L481 AbstractCegarLoop]: Abstraction has 1466 states and 2488 transitions. [2020-10-29 09:33:23,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:23,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1466 states and 2488 transitions. [2020-10-29 09:33:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:33:23,889 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:23,889 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:23,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-29 09:33:23,889 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1200229090, now seen corresponding path program 1 times [2020-10-29 09:33:23,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:23,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [967410967] [2020-10-29 09:33:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:23,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:23,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:23,958 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:33:23,958 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:23,958 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 52 [2020-10-29 09:33:23,959 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:23,959 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:23,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:23,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:23,959 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:23,960 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:23,999 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:24,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,006 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:24,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:24,007 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:24,007 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,007 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:24,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:24,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:24,015 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [967410967] [2020-10-29 09:33:24,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:24,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:24,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746155395] [2020-10-29 09:33:24,017 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:24,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:24,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:24,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:24,020 INFO L87 Difference]: Start difference. First operand 1466 states and 2488 transitions. Second operand 4 states. [2020-10-29 09:33:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:24,268 INFO L93 Difference]: Finished difference Result 2702 states and 4667 transitions. [2020-10-29 09:33:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:24,269 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:33:24,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:24,283 INFO L225 Difference]: With dead ends: 2702 [2020-10-29 09:33:24,283 INFO L226 Difference]: Without dead ends: 2699 [2020-10-29 09:33:24,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:24,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2699 states. [2020-10-29 09:33:24,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2699 to 2058. [2020-10-29 09:33:24,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2058 states. [2020-10-29 09:33:24,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2058 states to 2058 states and 3416 transitions. [2020-10-29 09:33:24,367 INFO L78 Accepts]: Start accepts. Automaton has 2058 states and 3416 transitions. Word has length 32 [2020-10-29 09:33:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:24,367 INFO L481 AbstractCegarLoop]: Abstraction has 2058 states and 3416 transitions. [2020-10-29 09:33:24,367 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:24,367 INFO L276 IsEmpty]: Start isEmpty. Operand 2058 states and 3416 transitions. [2020-10-29 09:33:24,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-29 09:33:24,370 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:24,371 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:24,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-29 09:33:24,371 INFO L429 AbstractCegarLoop]: === Iteration 16 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:24,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:24,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1405794464, now seen corresponding path program 1 times [2020-10-29 09:33:24,372 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:24,372 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085280321] [2020-10-29 09:33:24,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:24,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,421 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-29 09:33:24,421 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:24,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-29 09:33:24,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,422 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:24,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:24,423 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,462 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,466 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:24,466 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:24,466 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:24,466 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:24,466 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:24,466 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:24,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:24,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:24,467 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:24,467 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:24,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:24,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085280321] [2020-10-29 09:33:24,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:24,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:24,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312872040] [2020-10-29 09:33:24,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:24,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:24,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:24,482 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:24,482 INFO L87 Difference]: Start difference. First operand 2058 states and 3416 transitions. Second operand 4 states. [2020-10-29 09:33:24,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:24,797 INFO L93 Difference]: Finished difference Result 4878 states and 8155 transitions. [2020-10-29 09:33:24,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:24,798 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 32 [2020-10-29 09:33:24,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:24,814 INFO L225 Difference]: With dead ends: 4878 [2020-10-29 09:33:24,814 INFO L226 Difference]: Without dead ends: 2859 [2020-10-29 09:33:24,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:24,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2859 states. [2020-10-29 09:33:24,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2859 to 2858. [2020-10-29 09:33:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2858 states. [2020-10-29 09:33:24,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2858 states to 2858 states and 4744 transitions. [2020-10-29 09:33:24,938 INFO L78 Accepts]: Start accepts. Automaton has 2858 states and 4744 transitions. Word has length 32 [2020-10-29 09:33:24,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:24,938 INFO L481 AbstractCegarLoop]: Abstraction has 2858 states and 4744 transitions. [2020-10-29 09:33:24,938 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:24,938 INFO L276 IsEmpty]: Start isEmpty. Operand 2858 states and 4744 transitions. [2020-10-29 09:33:24,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:33:24,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:24,942 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:24,943 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-29 09:33:24,943 INFO L429 AbstractCegarLoop]: === Iteration 17 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:24,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:24,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1454214903, now seen corresponding path program 1 times [2020-10-29 09:33:24,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:24,944 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1534103320] [2020-10-29 09:33:24,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:24,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:24,965 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:24,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:25,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:25,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:33:25,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:25,055 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 95 [2020-10-29 09:33:25,055 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:25,055 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:25,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:33:25,056 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:25,056 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:25,112 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:25,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:25,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:25,119 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:25,119 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:25,119 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:25,119 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:25,120 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:25,120 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:25,120 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:25,120 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:25,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:25,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1534103320] [2020-10-29 09:33:25,127 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:25,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:25,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738351296] [2020-10-29 09:33:25,129 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:25,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:25,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:25,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:25,135 INFO L87 Difference]: Start difference. First operand 2858 states and 4744 transitions. Second operand 4 states. [2020-10-29 09:33:25,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:25,531 INFO L93 Difference]: Finished difference Result 5230 states and 8843 transitions. [2020-10-29 09:33:25,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:25,532 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-29 09:33:25,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:25,562 INFO L225 Difference]: With dead ends: 5230 [2020-10-29 09:33:25,562 INFO L226 Difference]: Without dead ends: 5227 [2020-10-29 09:33:25,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:25,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5227 states. [2020-10-29 09:33:25,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5227 to 4074. [2020-10-29 09:33:25,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4074 states. [2020-10-29 09:33:25,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4074 states to 4074 states and 6600 transitions. [2020-10-29 09:33:25,760 INFO L78 Accepts]: Start accepts. Automaton has 4074 states and 6600 transitions. Word has length 33 [2020-10-29 09:33:25,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:25,761 INFO L481 AbstractCegarLoop]: Abstraction has 4074 states and 6600 transitions. [2020-10-29 09:33:25,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:25,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4074 states and 6600 transitions. [2020-10-29 09:33:25,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-29 09:33:25,767 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:25,767 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:25,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-29 09:33:25,768 INFO L429 AbstractCegarLoop]: === Iteration 18 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:25,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:25,768 INFO L82 PathProgramCache]: Analyzing trace with hash -234728839, now seen corresponding path program 1 times [2020-10-29 09:33:25,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:25,769 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1673618038] [2020-10-29 09:33:25,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:25,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:25,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:25,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:25,895 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:25,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-29 09:33:25,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:25,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 113 [2020-10-29 09:33:25,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:25,896 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:25,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:25,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:33:25,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:25,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:25,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:25,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:25,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:25,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:25,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:25,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:25,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-29 09:33:25,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:25,950 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:25,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:25,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:25,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:25,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1673618038] [2020-10-29 09:33:25,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:25,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:25,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901600024] [2020-10-29 09:33:25,959 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:25,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:25,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:25,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:25,966 INFO L87 Difference]: Start difference. First operand 4074 states and 6600 transitions. Second operand 4 states. [2020-10-29 09:33:26,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:26,289 INFO L93 Difference]: Finished difference Result 9646 states and 15755 transitions. [2020-10-29 09:33:26,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:26,289 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 33 [2020-10-29 09:33:26,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:26,331 INFO L225 Difference]: With dead ends: 9646 [2020-10-29 09:33:26,331 INFO L226 Difference]: Without dead ends: 5611 [2020-10-29 09:33:26,339 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:26,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5611 states. [2020-10-29 09:33:26,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5611 to 5610. [2020-10-29 09:33:26,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5610 states. [2020-10-29 09:33:26,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5610 states to 5610 states and 9096 transitions. [2020-10-29 09:33:26,571 INFO L78 Accepts]: Start accepts. Automaton has 5610 states and 9096 transitions. Word has length 33 [2020-10-29 09:33:26,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:26,571 INFO L481 AbstractCegarLoop]: Abstraction has 5610 states and 9096 transitions. [2020-10-29 09:33:26,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:26,571 INFO L276 IsEmpty]: Start isEmpty. Operand 5610 states and 9096 transitions. [2020-10-29 09:33:26,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:33:26,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:26,578 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:26,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-29 09:33:26,578 INFO L429 AbstractCegarLoop]: === Iteration 19 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:26,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:26,579 INFO L82 PathProgramCache]: Analyzing trace with hash 2137610633, now seen corresponding path program 1 times [2020-10-29 09:33:26,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:26,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1020028826] [2020-10-29 09:33:26,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:26,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:26,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:26,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:26,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:26,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:26,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:33:26,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:26,767 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 175 [2020-10-29 09:33:26,767 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:26,767 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:26,767 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:26,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:33:26,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:26,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:26,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:26,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:26,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:26,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:26,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:26,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:26,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:26,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:26,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:26,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:26,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:26,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:26,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:26,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:26,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1020028826] [2020-10-29 09:33:26,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:26,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:26,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502262491] [2020-10-29 09:33:26,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:26,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:26,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:26,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:26,820 INFO L87 Difference]: Start difference. First operand 5610 states and 9096 transitions. Second operand 4 states. [2020-10-29 09:33:27,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:27,186 INFO L93 Difference]: Finished difference Result 10158 states and 16779 transitions. [2020-10-29 09:33:27,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:27,187 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-29 09:33:27,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:27,210 INFO L225 Difference]: With dead ends: 10158 [2020-10-29 09:33:27,210 INFO L226 Difference]: Without dead ends: 10155 [2020-10-29 09:33:27,213 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:27,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10155 states. [2020-10-29 09:33:27,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10155 to 8106. [2020-10-29 09:33:27,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8106 states. [2020-10-29 09:33:27,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8106 states to 8106 states and 12808 transitions. [2020-10-29 09:33:27,515 INFO L78 Accepts]: Start accepts. Automaton has 8106 states and 12808 transitions. Word has length 34 [2020-10-29 09:33:27,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:27,515 INFO L481 AbstractCegarLoop]: Abstraction has 8106 states and 12808 transitions. [2020-10-29 09:33:27,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:27,515 INFO L276 IsEmpty]: Start isEmpty. Operand 8106 states and 12808 transitions. [2020-10-29 09:33:27,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2020-10-29 09:33:27,529 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:27,529 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:27,529 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-29 09:33:27,530 INFO L429 AbstractCegarLoop]: === Iteration 20 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:27,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:27,530 INFO L82 PathProgramCache]: Analyzing trace with hash 448666891, now seen corresponding path program 1 times [2020-10-29 09:33:27,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:27,530 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2055432465] [2020-10-29 09:33:27,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:27,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:27,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:27,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:27,591 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:27,778 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:27,778 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-10-29 09:33:27,778 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 233 [2020-10-29 09:33:27,779 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:27,779 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:33:27,779 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:27,779 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:27,819 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:27,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:27,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:27,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:27,827 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:27,827 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:27,827 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:27,827 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:27,827 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:27,828 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:27,828 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:27,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:27,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2055432465] [2020-10-29 09:33:27,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:27,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:27,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971619189] [2020-10-29 09:33:27,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:27,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:27,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:27,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:27,835 INFO L87 Difference]: Start difference. First operand 8106 states and 12808 transitions. Second operand 4 states. [2020-10-29 09:33:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:28,266 INFO L93 Difference]: Finished difference Result 19118 states and 30475 transitions. [2020-10-29 09:33:28,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:28,267 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 34 [2020-10-29 09:33:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:28,290 INFO L225 Difference]: With dead ends: 19118 [2020-10-29 09:33:28,291 INFO L226 Difference]: Without dead ends: 11051 [2020-10-29 09:33:28,309 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:28,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11051 states. [2020-10-29 09:33:28,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11051 to 11050. [2020-10-29 09:33:28,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11050 states. [2020-10-29 09:33:28,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11050 states to 11050 states and 17480 transitions. [2020-10-29 09:33:28,608 INFO L78 Accepts]: Start accepts. Automaton has 11050 states and 17480 transitions. Word has length 34 [2020-10-29 09:33:28,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:28,609 INFO L481 AbstractCegarLoop]: Abstraction has 11050 states and 17480 transitions. [2020-10-29 09:33:28,609 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:28,609 INFO L276 IsEmpty]: Start isEmpty. Operand 11050 states and 17480 transitions. [2020-10-29 09:33:28,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:33:28,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:28,622 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:28,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-29 09:33:28,623 INFO L429 AbstractCegarLoop]: === Iteration 21 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:28,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:28,623 INFO L82 PathProgramCache]: Analyzing trace with hash 1848052354, now seen corresponding path program 1 times [2020-10-29 09:33:28,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:28,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181925246] [2020-10-29 09:33:28,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:28,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:28,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:28,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:28,695 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:29,008 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:29,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:33:29,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-29 09:33:29,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 371 [2020-10-29 09:33:29,009 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:29,009 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:29,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:29,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-29 09:33:29,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:29,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:29,050 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:29,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:29,053 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:29,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:29,056 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:29,056 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:29,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:29,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:29,057 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:29,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:29,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:29,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:29,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:29,064 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181925246] [2020-10-29 09:33:29,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:29,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:29,064 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837677282] [2020-10-29 09:33:29,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:29,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:29,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:29,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:29,066 INFO L87 Difference]: Start difference. First operand 11050 states and 17480 transitions. Second operand 4 states. [2020-10-29 09:33:29,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:29,414 INFO L93 Difference]: Finished difference Result 16590 states and 26187 transitions. [2020-10-29 09:33:29,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:29,414 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-29 09:33:29,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:29,440 INFO L225 Difference]: With dead ends: 16590 [2020-10-29 09:33:29,440 INFO L226 Difference]: Without dead ends: 11147 [2020-10-29 09:33:29,455 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:29,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11147 states. [2020-10-29 09:33:29,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11147 to 11146. [2020-10-29 09:33:29,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11146 states. [2020-10-29 09:33:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11146 states to 11146 states and 17416 transitions. [2020-10-29 09:33:29,839 INFO L78 Accepts]: Start accepts. Automaton has 11146 states and 17416 transitions. Word has length 35 [2020-10-29 09:33:29,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:29,840 INFO L481 AbstractCegarLoop]: Abstraction has 11146 states and 17416 transitions. [2020-10-29 09:33:29,840 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:29,840 INFO L276 IsEmpty]: Start isEmpty. Operand 11146 states and 17416 transitions. [2020-10-29 09:33:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:33:29,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:29,854 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:29,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-29 09:33:29,854 INFO L429 AbstractCegarLoop]: === Iteration 22 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:29,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:29,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2024213116, now seen corresponding path program 1 times [2020-10-29 09:33:29,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:29,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2095435943] [2020-10-29 09:33:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:29,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:29,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:29,900 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:29,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:30,075 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:30,075 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:33:30,075 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:30,075 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-29 09:33:30,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:30,076 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:30,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:30,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-29 09:33:30,076 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:30,076 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:30,123 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:30,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:30,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:30,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:30,130 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:30,130 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:30,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:30,131 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:30,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:30,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:30,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:30,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2095435943] [2020-10-29 09:33:30,136 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:30,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:30,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500610588] [2020-10-29 09:33:30,137 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:30,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:30,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:30,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:30,139 INFO L87 Difference]: Start difference. First operand 11146 states and 17416 transitions. Second operand 4 states. [2020-10-29 09:33:30,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:30,567 INFO L93 Difference]: Finished difference Result 16718 states and 26059 transitions. [2020-10-29 09:33:30,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:30,567 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-29 09:33:30,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:30,592 INFO L225 Difference]: With dead ends: 16718 [2020-10-29 09:33:30,593 INFO L226 Difference]: Without dead ends: 11275 [2020-10-29 09:33:30,608 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:30,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11275 states. [2020-10-29 09:33:31,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11275 to 11274. [2020-10-29 09:33:31,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11274 states. [2020-10-29 09:33:31,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11274 states to 11274 states and 17416 transitions. [2020-10-29 09:33:31,128 INFO L78 Accepts]: Start accepts. Automaton has 11274 states and 17416 transitions. Word has length 35 [2020-10-29 09:33:31,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:31,129 INFO L481 AbstractCegarLoop]: Abstraction has 11274 states and 17416 transitions. [2020-10-29 09:33:31,129 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:31,129 INFO L276 IsEmpty]: Start isEmpty. Operand 11274 states and 17416 transitions. [2020-10-29 09:33:31,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:33:31,144 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:31,145 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:31,145 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-29 09:33:31,145 INFO L429 AbstractCegarLoop]: === Iteration 23 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:31,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:31,146 INFO L82 PathProgramCache]: Analyzing trace with hash 1453105730, now seen corresponding path program 1 times [2020-10-29 09:33:31,146 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:31,146 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1085457954] [2020-10-29 09:33:31,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:31,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:31,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:31,184 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:31,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:31,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:33:31,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:31,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-10-29 09:33:31,266 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:31,267 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:33:31,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:31,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:31,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:31,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:31,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:31,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:31,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:31,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:31,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:31,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:31,317 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:31,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:31,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:31,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:31,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1085457954] [2020-10-29 09:33:31,324 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:31,324 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:31,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666465825] [2020-10-29 09:33:31,326 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:31,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:31,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:31,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:31,330 INFO L87 Difference]: Start difference. First operand 11274 states and 17416 transitions. Second operand 4 states. [2020-10-29 09:33:31,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:31,822 INFO L93 Difference]: Finished difference Result 19982 states and 31499 transitions. [2020-10-29 09:33:31,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:31,823 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-29 09:33:31,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:31,875 INFO L225 Difference]: With dead ends: 19982 [2020-10-29 09:33:31,875 INFO L226 Difference]: Without dead ends: 19979 [2020-10-29 09:33:31,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:31,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19979 states. [2020-10-29 09:33:32,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19979 to 16394. [2020-10-29 09:33:32,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16394 states. [2020-10-29 09:33:32,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16394 states to 16394 states and 24584 transitions. [2020-10-29 09:33:32,382 INFO L78 Accepts]: Start accepts. Automaton has 16394 states and 24584 transitions. Word has length 35 [2020-10-29 09:33:32,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:32,383 INFO L481 AbstractCegarLoop]: Abstraction has 16394 states and 24584 transitions. [2020-10-29 09:33:32,383 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:32,383 INFO L276 IsEmpty]: Start isEmpty. Operand 16394 states and 24584 transitions. [2020-10-29 09:33:32,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-29 09:33:32,406 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:32,406 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:32,407 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-29 09:33:32,407 INFO L429 AbstractCegarLoop]: === Iteration 24 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:32,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:32,407 INFO L82 PathProgramCache]: Analyzing trace with hash -235838012, now seen corresponding path program 1 times [2020-10-29 09:33:32,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:32,408 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1167413408] [2020-10-29 09:33:32,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:32,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:32,423 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:32,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-29 09:33:32,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:32,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 84 [2020-10-29 09:33:32,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:32,503 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:32,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:32,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:33:32,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:32,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:32,543 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:32,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:32,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:32,548 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:32,549 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:32,549 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:32,549 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:32,549 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:32,549 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:32,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:32,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:32,550 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:32,550 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:32,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1167413408] [2020-10-29 09:33:32,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:32,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:32,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863058384] [2020-10-29 09:33:32,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:32,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:32,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:32,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:32,556 INFO L87 Difference]: Start difference. First operand 16394 states and 24584 transitions. Second operand 4 states. [2020-10-29 09:33:33,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:33,153 INFO L93 Difference]: Finished difference Result 38158 states and 57611 transitions. [2020-10-29 09:33:33,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:33,153 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 35 [2020-10-29 09:33:33,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:33,193 INFO L225 Difference]: With dead ends: 38158 [2020-10-29 09:33:33,193 INFO L226 Difference]: Without dead ends: 22027 [2020-10-29 09:33:33,221 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:33,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22027 states. [2020-10-29 09:33:33,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22027 to 22026. [2020-10-29 09:33:33,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22026 states. [2020-10-29 09:33:33,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22026 states to 22026 states and 33032 transitions. [2020-10-29 09:33:33,844 INFO L78 Accepts]: Start accepts. Automaton has 22026 states and 33032 transitions. Word has length 35 [2020-10-29 09:33:33,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:33,845 INFO L481 AbstractCegarLoop]: Abstraction has 22026 states and 33032 transitions. [2020-10-29 09:33:33,845 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:33,845 INFO L276 IsEmpty]: Start isEmpty. Operand 22026 states and 33032 transitions. [2020-10-29 09:33:33,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:33:33,880 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:33,880 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:33,881 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-29 09:33:33,881 INFO L429 AbstractCegarLoop]: === Iteration 25 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:33,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:33,882 INFO L82 PathProgramCache]: Analyzing trace with hash 2103247412, now seen corresponding path program 1 times [2020-10-29 09:33:33,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:33,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552072170] [2020-10-29 09:33:33,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:33,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:33,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:33,931 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,040 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,041 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:33:34,041 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:33:34,041 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 148 [2020-10-29 09:33:34,041 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,041 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-29 09:33:34,042 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:34,042 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:34,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:34,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:34,084 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:34,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:34,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:34,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:34,085 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:34,085 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:34,085 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:34,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:34,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:34,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552072170] [2020-10-29 09:33:34,188 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:34,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:34,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [754498126] [2020-10-29 09:33:34,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:34,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:34,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:34,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:34,190 INFO L87 Difference]: Start difference. First operand 22026 states and 33032 transitions. Second operand 4 states. [2020-10-29 09:33:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:34,717 INFO L93 Difference]: Finished difference Result 33038 states and 49419 transitions. [2020-10-29 09:33:34,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:34,718 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-29 09:33:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:34,767 INFO L225 Difference]: With dead ends: 33038 [2020-10-29 09:33:34,768 INFO L226 Difference]: Without dead ends: 22283 [2020-10-29 09:33:34,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:34,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2020-10-29 09:33:35,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22282. [2020-10-29 09:33:35,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22282 states. [2020-10-29 09:33:35,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22282 states to 22282 states and 33032 transitions. [2020-10-29 09:33:35,540 INFO L78 Accepts]: Start accepts. Automaton has 22282 states and 33032 transitions. Word has length 36 [2020-10-29 09:33:35,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:35,541 INFO L481 AbstractCegarLoop]: Abstraction has 22282 states and 33032 transitions. [2020-10-29 09:33:35,541 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:35,541 INFO L276 IsEmpty]: Start isEmpty. Operand 22282 states and 33032 transitions. [2020-10-29 09:33:35,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:33:35,566 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:35,567 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:35,567 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-29 09:33:35,567 INFO L429 AbstractCegarLoop]: === Iteration 26 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:35,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:35,568 INFO L82 PathProgramCache]: Analyzing trace with hash 1285598962, now seen corresponding path program 1 times [2020-10-29 09:33:35,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:35,568 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998352790] [2020-10-29 09:33:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:35,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,667 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:35,667 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:33:35,667 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:35,667 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-10-29 09:33:35,668 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:35,668 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-29 09:33:35,668 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:35,668 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:35,707 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:35,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:35,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:35,713 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:35,713 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:35,713 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:35,714 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:35,714 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:35,714 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:35,714 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:35,715 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:35,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:35,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998352790] [2020-10-29 09:33:35,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:35,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:35,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236404606] [2020-10-29 09:33:35,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:35,722 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:35,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:35,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:35,722 INFO L87 Difference]: Start difference. First operand 22282 states and 33032 transitions. Second operand 4 states. [2020-10-29 09:33:36,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:36,256 INFO L93 Difference]: Finished difference Result 33038 states and 48651 transitions. [2020-10-29 09:33:36,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:36,257 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-29 09:33:36,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:36,306 INFO L225 Difference]: With dead ends: 33038 [2020-10-29 09:33:36,307 INFO L226 Difference]: Without dead ends: 22283 [2020-10-29 09:33:36,330 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:36,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22283 states. [2020-10-29 09:33:37,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22283 to 22282. [2020-10-29 09:33:37,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22282 states. [2020-10-29 09:33:37,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22282 states to 22282 states and 32520 transitions. [2020-10-29 09:33:37,080 INFO L78 Accepts]: Start accepts. Automaton has 22282 states and 32520 transitions. Word has length 36 [2020-10-29 09:33:37,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:37,080 INFO L481 AbstractCegarLoop]: Abstraction has 22282 states and 32520 transitions. [2020-10-29 09:33:37,080 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:37,080 INFO L276 IsEmpty]: Start isEmpty. Operand 22282 states and 32520 transitions. [2020-10-29 09:33:37,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:33:37,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:37,095 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:37,095 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-29 09:33:37,095 INFO L429 AbstractCegarLoop]: === Iteration 27 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:37,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:37,098 INFO L82 PathProgramCache]: Analyzing trace with hash -519839372, now seen corresponding path program 1 times [2020-10-29 09:33:37,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:37,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [762681998] [2020-10-29 09:33:37,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:37,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:37,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:37,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:37,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:33:37,140 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:37,140 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 31 [2020-10-29 09:33:37,140 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:37,140 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:37,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:37,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:33:37,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:37,141 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:37,179 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:37,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:37,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:37,187 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:37,187 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:37,187 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:37,188 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:37,188 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:37,188 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:37,188 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:37,189 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:37,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:37,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [762681998] [2020-10-29 09:33:37,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:37,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:37,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075769344] [2020-10-29 09:33:37,194 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:37,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:37,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:37,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:37,195 INFO L87 Difference]: Start difference. First operand 22282 states and 32520 transitions. Second operand 4 states. [2020-10-29 09:33:37,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:37,940 INFO L93 Difference]: Finished difference Result 65294 states and 94475 transitions. [2020-10-29 09:33:37,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:37,940 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-29 09:33:37,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:37,999 INFO L225 Difference]: With dead ends: 65294 [2020-10-29 09:33:38,000 INFO L226 Difference]: Without dead ends: 43531 [2020-10-29 09:33:38,030 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:38,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43531 states. [2020-10-29 09:33:39,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43531 to 43530. [2020-10-29 09:33:39,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43530 states. [2020-10-29 09:33:39,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43530 states to 43530 states and 61960 transitions. [2020-10-29 09:33:39,212 INFO L78 Accepts]: Start accepts. Automaton has 43530 states and 61960 transitions. Word has length 36 [2020-10-29 09:33:39,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:39,213 INFO L481 AbstractCegarLoop]: Abstraction has 43530 states and 61960 transitions. [2020-10-29 09:33:39,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:39,213 INFO L276 IsEmpty]: Start isEmpty. Operand 43530 states and 61960 transitions. [2020-10-29 09:33:39,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-29 09:33:39,246 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:39,246 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:39,247 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-29 09:33:39,247 INFO L429 AbstractCegarLoop]: === Iteration 28 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:39,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1169104370, now seen corresponding path program 1 times [2020-10-29 09:33:39,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:39,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1976047586] [2020-10-29 09:33:39,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:39,264 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,294 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:39,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-29 09:33:39,295 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:39,295 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-29 09:33:39,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:39,295 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:39,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:39,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 23 [2020-10-29 09:33:39,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:39,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:39,339 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:39,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:39,342 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:39,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:39,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:39,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:39,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-29 09:33:39,347 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:39,348 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:39,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:39,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:39,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1976047586] [2020-10-29 09:33:39,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:39,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:39,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408666269] [2020-10-29 09:33:39,355 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:39,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:39,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:39,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:39,356 INFO L87 Difference]: Start difference. First operand 43530 states and 61960 transitions. Second operand 4 states. [2020-10-29 09:33:39,629 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-29 09:33:40,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:40,399 INFO L93 Difference]: Finished difference Result 49678 states and 73227 transitions. [2020-10-29 09:33:40,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:40,399 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2020-10-29 09:33:40,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:40,472 INFO L225 Difference]: With dead ends: 49678 [2020-10-29 09:33:40,472 INFO L226 Difference]: Without dead ends: 49675 [2020-10-29 09:33:40,481 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:40,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49675 states. [2020-10-29 09:33:41,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49675 to 43530. [2020-10-29 09:33:41,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43530 states. [2020-10-29 09:33:41,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43530 states to 43530 states and 61448 transitions. [2020-10-29 09:33:41,513 INFO L78 Accepts]: Start accepts. Automaton has 43530 states and 61448 transitions. Word has length 36 [2020-10-29 09:33:41,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:41,514 INFO L481 AbstractCegarLoop]: Abstraction has 43530 states and 61448 transitions. [2020-10-29 09:33:41,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:41,514 INFO L276 IsEmpty]: Start isEmpty. Operand 43530 states and 61448 transitions. [2020-10-29 09:33:41,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:33:41,540 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:41,541 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:41,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-29 09:33:41,541 INFO L429 AbstractCegarLoop]: === Iteration 29 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:41,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:41,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1071501965, now seen corresponding path program 1 times [2020-10-29 09:33:41,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:41,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873825416] [2020-10-29 09:33:41,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:41,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:41,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:41,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:33:41,585 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:41,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-29 09:33:41,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:41,585 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:41,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:33:41,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:41,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:41,631 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:41,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:41,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:41,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:41,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:41,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:41,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:41,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:41,637 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:41,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:41,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:41,638 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:41,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:41,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:41,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873825416] [2020-10-29 09:33:41,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:41,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:41,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409915177] [2020-10-29 09:33:41,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:41,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:41,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:41,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:41,644 INFO L87 Difference]: Start difference. First operand 43530 states and 61448 transitions. Second operand 4 states. [2020-10-29 09:33:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:43,036 INFO L93 Difference]: Finished difference Result 75278 states and 108555 transitions. [2020-10-29 09:33:43,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:43,039 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-29 09:33:43,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:43,190 INFO L225 Difference]: With dead ends: 75278 [2020-10-29 09:33:43,190 INFO L226 Difference]: Without dead ends: 75275 [2020-10-29 09:33:43,202 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:43,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75275 states. [2020-10-29 09:33:44,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75275 to 65034. [2020-10-29 09:33:44,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65034 states. [2020-10-29 09:33:44,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65034 states to 65034 states and 89096 transitions. [2020-10-29 09:33:44,430 INFO L78 Accepts]: Start accepts. Automaton has 65034 states and 89096 transitions. Word has length 37 [2020-10-29 09:33:44,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:44,430 INFO L481 AbstractCegarLoop]: Abstraction has 65034 states and 89096 transitions. [2020-10-29 09:33:44,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:44,431 INFO L276 IsEmpty]: Start isEmpty. Operand 65034 states and 89096 transitions. [2020-10-29 09:33:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-29 09:33:44,731 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:44,731 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:44,731 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-29 09:33:44,731 INFO L429 AbstractCegarLoop]: === Iteration 30 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:44,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:44,732 INFO L82 PathProgramCache]: Analyzing trace with hash -617441777, now seen corresponding path program 1 times [2020-10-29 09:33:44,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:44,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142507571] [2020-10-29 09:33:44,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:44,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:44,761 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:44,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:44,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-29 09:33:44,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:44,812 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 64 [2020-10-29 09:33:44,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:44,813 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:44,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:44,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:33:44,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:44,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:44,853 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:44,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:44,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:44,860 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:44,860 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:44,861 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:44,861 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:33:44,861 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:44,861 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:44,861 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:44,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:44,862 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:44,862 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-29 09:33:44,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:44,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142507571] [2020-10-29 09:33:44,869 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:44,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:44,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581736027] [2020-10-29 09:33:44,869 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:44,869 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:44,870 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:44,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:44,873 INFO L87 Difference]: Start difference. First operand 65034 states and 89096 transitions. Second operand 4 states. [2020-10-29 09:33:46,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:46,308 INFO L93 Difference]: Finished difference Result 150030 states and 206859 transitions. [2020-10-29 09:33:46,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:46,310 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 37 [2020-10-29 09:33:46,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:46,426 INFO L225 Difference]: With dead ends: 150030 [2020-10-29 09:33:46,426 INFO L226 Difference]: Without dead ends: 85515 [2020-10-29 09:33:46,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:46,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85515 states. [2020-10-29 09:33:48,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85515 to 85514. [2020-10-29 09:33:48,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85514 states. [2020-10-29 09:33:48,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85514 states to 85514 states and 116744 transitions. [2020-10-29 09:33:48,534 INFO L78 Accepts]: Start accepts. Automaton has 85514 states and 116744 transitions. Word has length 37 [2020-10-29 09:33:48,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:48,534 INFO L481 AbstractCegarLoop]: Abstraction has 85514 states and 116744 transitions. [2020-10-29 09:33:48,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:48,534 INFO L276 IsEmpty]: Start isEmpty. Operand 85514 states and 116744 transitions. [2020-10-29 09:33:48,787 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:33:48,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:48,789 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:48,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-29 09:33:48,791 INFO L429 AbstractCegarLoop]: === Iteration 31 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:48,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:48,799 INFO L82 PathProgramCache]: Analyzing trace with hash -1136513569, now seen corresponding path program 1 times [2020-10-29 09:33:48,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:48,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473580916] [2020-10-29 09:33:48,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:48,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:48,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:48,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:48,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:48,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:33:48,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:48,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 97 [2020-10-29 09:33:48,930 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:48,930 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:48,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:48,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 09:33:48,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:33:48,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:48,966 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:48,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:48,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:48,971 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:48,971 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:48,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:48,972 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:33:48,972 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:48,972 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:48,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:48,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:48,972 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:48,973 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:48,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:48,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473580916] [2020-10-29 09:33:48,977 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:48,977 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:48,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240755465] [2020-10-29 09:33:48,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:48,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:48,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:48,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:48,978 INFO L87 Difference]: Start difference. First operand 85514 states and 116744 transitions. Second operand 4 states. [2020-10-29 09:33:51,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:51,137 INFO L93 Difference]: Finished difference Result 145934 states and 202763 transitions. [2020-10-29 09:33:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:51,138 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-29 09:33:51,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:51,334 INFO L225 Difference]: With dead ends: 145934 [2020-10-29 09:33:51,334 INFO L226 Difference]: Without dead ends: 145931 [2020-10-29 09:33:51,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:51,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145931 states. [2020-10-29 09:33:53,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145931 to 129546. [2020-10-29 09:33:53,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129546 states. [2020-10-29 09:33:54,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129546 states to 129546 states and 172040 transitions. [2020-10-29 09:33:54,316 INFO L78 Accepts]: Start accepts. Automaton has 129546 states and 172040 transitions. Word has length 38 [2020-10-29 09:33:54,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:33:54,316 INFO L481 AbstractCegarLoop]: Abstraction has 129546 states and 172040 transitions. [2020-10-29 09:33:54,316 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:33:54,317 INFO L276 IsEmpty]: Start isEmpty. Operand 129546 states and 172040 transitions. [2020-10-29 09:33:54,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-29 09:33:54,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:33:54,398 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:33:54,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-29 09:33:54,398 INFO L429 AbstractCegarLoop]: === Iteration 32 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:33:54,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:33:54,399 INFO L82 PathProgramCache]: Analyzing trace with hash 1469509985, now seen corresponding path program 1 times [2020-10-29 09:33:54,399 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:33:54,399 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1034562556] [2020-10-29 09:33:54,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:33:54,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:54,415 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:54,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:54,490 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:54,490 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-29 09:33:54,490 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:33:54,490 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 80 [2020-10-29 09:33:54,490 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:54,491 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:33:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 09:33:54,491 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:33:54,491 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:54,558 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:33:54,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:33:54,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:33:54,569 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:33:54,569 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:33:54,570 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:33:54,570 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-29 09:33:54,570 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:33:54,570 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:33:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:33:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:33:54,570 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:33:54,570 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:33:54,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:33:54,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1034562556] [2020-10-29 09:33:54,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:33:54,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:33:54,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7381270] [2020-10-29 09:33:54,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:33:54,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:33:54,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:33:54,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:33:54,583 INFO L87 Difference]: Start difference. First operand 129546 states and 172040 transitions. Second operand 4 states. [2020-10-29 09:33:57,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:33:57,966 INFO L93 Difference]: Finished difference Result 297486 states and 397323 transitions. [2020-10-29 09:33:57,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:33:57,967 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 38 [2020-10-29 09:33:57,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:33:58,253 INFO L225 Difference]: With dead ends: 297486 [2020-10-29 09:33:58,254 INFO L226 Difference]: Without dead ends: 168459 [2020-10-29 09:33:58,345 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:33:58,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168459 states. [2020-10-29 09:34:02,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168459 to 168458. [2020-10-29 09:34:02,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168458 states. [2020-10-29 09:34:02,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168458 states to 168458 states and 222216 transitions. [2020-10-29 09:34:02,523 INFO L78 Accepts]: Start accepts. Automaton has 168458 states and 222216 transitions. Word has length 38 [2020-10-29 09:34:02,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:02,523 INFO L481 AbstractCegarLoop]: Abstraction has 168458 states and 222216 transitions. [2020-10-29 09:34:02,523 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:34:02,523 INFO L276 IsEmpty]: Start isEmpty. Operand 168458 states and 222216 transitions. [2020-10-29 09:34:02,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:34:02,626 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:02,626 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:02,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-29 09:34:02,627 INFO L429 AbstractCegarLoop]: === Iteration 33 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:02,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:02,627 INFO L82 PathProgramCache]: Analyzing trace with hash -865507816, now seen corresponding path program 1 times [2020-10-29 09:34:02,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:02,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314530812] [2020-10-29 09:34:02,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:02,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:02,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:02,656 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:02,680 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:02,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:02,790 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:34:02,790 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:34:02,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 150 [2020-10-29 09:34:02,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:02,791 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:02,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:34:02,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 24 [2020-10-29 09:34:02,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:34:02,791 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:02,832 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:02,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:02,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:02,838 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:02,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:02,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:02,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:02,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:02,838 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:02,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:02,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:02,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:34:02,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314530812] [2020-10-29 09:34:02,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:34:02,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:34:02,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219256720] [2020-10-29 09:34:02,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:34:02,846 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:02,846 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:34:02,846 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:34:02,846 INFO L87 Difference]: Start difference. First operand 168458 states and 222216 transitions. Second operand 4 states. [2020-10-29 09:34:05,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:05,688 INFO L93 Difference]: Finished difference Result 252942 states and 332811 transitions. [2020-10-29 09:34:05,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:34:05,689 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-29 09:34:05,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:05,971 INFO L225 Difference]: With dead ends: 252942 [2020-10-29 09:34:05,971 INFO L226 Difference]: Without dead ends: 169995 [2020-10-29 09:34:06,055 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:34:06,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169995 states. [2020-10-29 09:34:09,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169995 to 169994. [2020-10-29 09:34:09,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169994 states. [2020-10-29 09:34:10,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169994 states to 169994 states and 221192 transitions. [2020-10-29 09:34:10,103 INFO L78 Accepts]: Start accepts. Automaton has 169994 states and 221192 transitions. Word has length 39 [2020-10-29 09:34:10,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:10,103 INFO L481 AbstractCegarLoop]: Abstraction has 169994 states and 221192 transitions. [2020-10-29 09:34:10,103 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:34:10,104 INFO L276 IsEmpty]: Start isEmpty. Operand 169994 states and 221192 transitions. [2020-10-29 09:34:10,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:34:10,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:10,194 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:10,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-29 09:34:10,194 INFO L429 AbstractCegarLoop]: === Iteration 34 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:10,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:10,195 INFO L82 PathProgramCache]: Analyzing trace with hash -442805990, now seen corresponding path program 1 times [2020-10-29 09:34:10,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:10,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2065211188] [2020-10-29 09:34:10,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:10,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:10,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:10,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:10,288 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:10,289 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:34:10,289 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:10,289 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 83 [2020-10-29 09:34:10,289 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:10,289 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:34:10,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 09:34:10,290 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:34:10,290 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:10,335 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:10,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:10,338 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:10,341 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:10,342 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:10,342 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:10,342 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:10,342 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:10,342 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:10,342 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:10,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:10,343 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:10,343 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:10,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:34:10,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2065211188] [2020-10-29 09:34:10,349 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:34:10,349 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:34:10,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406208072] [2020-10-29 09:34:10,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:34:10,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:10,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:34:10,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:34:10,351 INFO L87 Difference]: Start difference. First operand 169994 states and 221192 transitions. Second operand 4 states. [2020-10-29 09:34:14,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:14,574 INFO L93 Difference]: Finished difference Result 284686 states and 374795 transitions. [2020-10-29 09:34:14,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:34:14,574 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-29 09:34:14,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:15,037 INFO L225 Difference]: With dead ends: 284686 [2020-10-29 09:34:15,037 INFO L226 Difference]: Without dead ends: 284683 [2020-10-29 09:34:15,082 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:34:15,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284683 states. [2020-10-29 09:34:20,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284683 to 260106. [2020-10-29 09:34:20,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 260106 states. [2020-10-29 09:34:20,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260106 states to 260106 states and 329736 transitions. [2020-10-29 09:34:20,894 INFO L78 Accepts]: Start accepts. Automaton has 260106 states and 329736 transitions. Word has length 39 [2020-10-29 09:34:20,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:20,895 INFO L481 AbstractCegarLoop]: Abstraction has 260106 states and 329736 transitions. [2020-10-29 09:34:20,895 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:34:20,895 INFO L276 IsEmpty]: Start isEmpty. Operand 260106 states and 329736 transitions. [2020-10-29 09:34:21,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-10-29 09:34:21,100 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:21,100 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:21,100 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-29 09:34:21,100 INFO L429 AbstractCegarLoop]: === Iteration 35 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:21,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:21,101 INFO L82 PathProgramCache]: Analyzing trace with hash -2131749732, now seen corresponding path program 1 times [2020-10-29 09:34:21,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:21,101 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1604910047] [2020-10-29 09:34:21,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:21,117 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:21,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:21,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:21,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-10-29 09:34:21,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:21,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 77 [2020-10-29 09:34:21,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:21,190 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:21,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:34:21,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 09:34:21,190 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:34:21,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:21,239 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:21,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:21,243 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:21,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:21,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:21,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:21,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:34:21,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:21,248 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:21,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:21,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:21,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:34:21,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1604910047] [2020-10-29 09:34:21,255 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:34:21,255 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:34:21,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663980574] [2020-10-29 09:34:21,255 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:34:21,255 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:21,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:34:21,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:34:21,256 INFO L87 Difference]: Start difference. First operand 260106 states and 329736 transitions. Second operand 4 states. [2020-10-29 09:34:21,920 WARN L193 SmtUtils]: Spent 563.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2020-10-29 09:34:26,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:26,983 INFO L93 Difference]: Finished difference Result 591886 states and 751627 transitions. [2020-10-29 09:34:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:34:26,983 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 39 [2020-10-29 09:34:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:28,102 INFO L225 Difference]: With dead ends: 591886 [2020-10-29 09:34:28,103 INFO L226 Difference]: Without dead ends: 333835 [2020-10-29 09:34:28,279 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:34:28,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333835 states. [2020-10-29 09:34:37,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333835 to 333834. [2020-10-29 09:34:37,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 333834 states. [2020-10-29 09:34:38,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333834 states to 333834 states and 417800 transitions. [2020-10-29 09:34:38,397 INFO L78 Accepts]: Start accepts. Automaton has 333834 states and 417800 transitions. Word has length 39 [2020-10-29 09:34:38,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:38,398 INFO L481 AbstractCegarLoop]: Abstraction has 333834 states and 417800 transitions. [2020-10-29 09:34:38,398 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:34:38,398 INFO L276 IsEmpty]: Start isEmpty. Operand 333834 states and 417800 transitions. [2020-10-29 09:34:39,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:34:39,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:39,163 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:39,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-29 09:34:39,163 INFO L429 AbstractCegarLoop]: === Iteration 36 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash -835398776, now seen corresponding path program 1 times [2020-10-29 09:34:39,169 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:39,169 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774741546] [2020-10-29 09:34:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:39,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:39,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:39,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:39,217 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:39,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:39,324 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:34:39,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-29 09:34:39,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-10-29 09:34:39,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:39,324 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:34:39,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-29 09:34:39,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:34:39,325 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:39,368 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:39,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:39,374 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:39,374 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:39,374 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:39,374 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:39,374 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:39,374 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:39,375 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:39,375 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:39,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:34:39,380 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774741546] [2020-10-29 09:34:39,380 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:34:39,380 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:34:39,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646023809] [2020-10-29 09:34:39,381 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:34:39,381 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:39,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:34:39,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:34:39,381 INFO L87 Difference]: Start difference. First operand 333834 states and 417800 transitions. Second operand 4 states. [2020-10-29 09:34:44,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:44,435 INFO L93 Difference]: Finished difference Result 499726 states and 622603 transitions. [2020-10-29 09:34:44,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:34:44,435 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-29 09:34:44,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:34:45,467 INFO L225 Difference]: With dead ends: 499726 [2020-10-29 09:34:45,467 INFO L226 Difference]: Without dead ends: 335883 [2020-10-29 09:34:45,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:34:45,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335883 states. [2020-10-29 09:34:52,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335883 to 335882. [2020-10-29 09:34:52,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 335882 states. [2020-10-29 09:34:53,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335882 states to 335882 states and 413704 transitions. [2020-10-29 09:34:53,232 INFO L78 Accepts]: Start accepts. Automaton has 335882 states and 413704 transitions. Word has length 40 [2020-10-29 09:34:53,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:34:53,232 INFO L481 AbstractCegarLoop]: Abstraction has 335882 states and 413704 transitions. [2020-10-29 09:34:53,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:34:53,232 INFO L276 IsEmpty]: Start isEmpty. Operand 335882 states and 413704 transitions. [2020-10-29 09:34:53,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:34:53,916 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:34:53,917 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:34:53,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-29 09:34:53,917 INFO L429 AbstractCegarLoop]: === Iteration 37 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:34:53,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:34:53,917 INFO L82 PathProgramCache]: Analyzing trace with hash -412696950, now seen corresponding path program 1 times [2020-10-29 09:34:53,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:34:53,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794243240] [2020-10-29 09:34:53,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:34:53,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:53,930 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:53,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:53,998 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:53,998 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:34:53,998 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:34:53,998 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 72 [2020-10-29 09:34:53,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:53,999 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:34:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 26 [2020-10-29 09:34:53,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:34:53,999 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:54,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:34:54,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:34:54,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:34:54,054 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:34:54,054 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:34:54,054 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:34:54,054 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:34:54,054 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:34:54,054 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:34:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:34:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:34:54,055 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:34:54,055 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:34:54,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:34:54,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794243240] [2020-10-29 09:34:54,060 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:34:54,060 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:34:54,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952233165] [2020-10-29 09:34:54,061 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:34:54,061 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:34:54,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:34:54,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:34:54,062 INFO L87 Difference]: Start difference. First operand 335882 states and 413704 transitions. Second operand 4 states. [2020-10-29 09:34:59,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:34:59,344 INFO L93 Difference]: Finished difference Result 503822 states and 618507 transitions. [2020-10-29 09:34:59,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:34:59,345 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-29 09:34:59,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:00,047 INFO L225 Difference]: With dead ends: 503822 [2020-10-29 09:35:00,047 INFO L226 Difference]: Without dead ends: 339979 [2020-10-29 09:35:00,173 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:35:00,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339979 states. [2020-10-29 09:35:08,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339979 to 339978. [2020-10-29 09:35:08,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 339978 states. [2020-10-29 09:35:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339978 states to 339978 states and 413704 transitions. [2020-10-29 09:35:10,520 INFO L78 Accepts]: Start accepts. Automaton has 339978 states and 413704 transitions. Word has length 40 [2020-10-29 09:35:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:10,520 INFO L481 AbstractCegarLoop]: Abstraction has 339978 states and 413704 transitions. [2020-10-29 09:35:10,520 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:35:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 339978 states and 413704 transitions. [2020-10-29 09:35:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:35:11,395 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:11,395 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:11,395 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-29 09:35:11,395 INFO L429 AbstractCegarLoop]: === Iteration 38 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:11,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:11,398 INFO L82 PathProgramCache]: Analyzing trace with hash -1230345400, now seen corresponding path program 1 times [2020-10-29 09:35:11,414 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:11,414 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [227500371] [2020-10-29 09:35:11,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:11,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:11,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:11,529 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:11,529 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:35:11,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:11,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 94 [2020-10-29 09:35:11,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:11,533 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:35:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 09:35:11,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-29 09:35:11,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:11,919 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2020-10-29 09:35:11,920 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:11,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:11,926 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:11,927 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:11,927 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:11,927 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:35:11,927 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:11,927 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:11,927 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:11,928 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:11,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:35:11,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [227500371] [2020-10-29 09:35:11,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:35:11,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:35:11,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837817270] [2020-10-29 09:35:11,936 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:35:11,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:11,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:35:11,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:35:11,937 INFO L87 Difference]: Start difference. First operand 339978 states and 413704 transitions. Second operand 4 states. [2020-10-29 09:35:20,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:20,358 INFO L93 Difference]: Finished difference Result 557070 states and 679947 transitions. [2020-10-29 09:35:20,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:35:20,359 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-29 09:35:20,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:21,676 INFO L225 Difference]: With dead ends: 557070 [2020-10-29 09:35:21,676 INFO L226 Difference]: Without dead ends: 557067 [2020-10-29 09:35:21,763 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:35:22,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557067 states. [2020-10-29 09:35:31,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557067 to 524298. [2020-10-29 09:35:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 524298 states. [2020-10-29 09:35:33,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524298 states to 524298 states and 622600 transitions. [2020-10-29 09:35:33,740 INFO L78 Accepts]: Start accepts. Automaton has 524298 states and 622600 transitions. Word has length 40 [2020-10-29 09:35:33,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:35:33,740 INFO L481 AbstractCegarLoop]: Abstraction has 524298 states and 622600 transitions. [2020-10-29 09:35:33,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:35:33,740 INFO L276 IsEmpty]: Start isEmpty. Operand 524298 states and 622600 transitions. [2020-10-29 09:35:34,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2020-10-29 09:35:34,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:35:34,162 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:35:34,162 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-29 09:35:34,163 INFO L429 AbstractCegarLoop]: === Iteration 39 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:35:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:35:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1375678154, now seen corresponding path program 1 times [2020-10-29 09:35:34,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:35:34,163 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [478251550] [2020-10-29 09:35:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:35:34,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:34,173 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:34,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:34,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-10-29 09:35:34,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-29 09:35:34,195 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:34,195 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:35:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 09:35:34,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:35:34,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:34,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:35:34,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:35:34,236 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:35:34,239 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:35:34,240 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:35:34,240 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:35:34,240 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-29 09:35:34,240 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:35:34,240 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:35:34,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:35:34,240 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:35:34,241 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:35:34,241 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:35:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:35:34,245 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [478251550] [2020-10-29 09:35:34,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:35:34,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:35:34,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171682887] [2020-10-29 09:35:34,246 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:35:34,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:35:34,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:35:34,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:35:34,247 INFO L87 Difference]: Start difference. First operand 524298 states and 622600 transitions. Second operand 4 states. [2020-10-29 09:35:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:35:48,248 INFO L93 Difference]: Finished difference Result 1179662 states and 1392651 transitions. [2020-10-29 09:35:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:35:48,249 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 40 [2020-10-29 09:35:48,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:35:49,465 INFO L225 Difference]: With dead ends: 1179662 [2020-10-29 09:35:49,465 INFO L226 Difference]: Without dead ends: 663563 [2020-10-29 09:35:49,743 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:35:50,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663563 states. [2020-10-29 09:36:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663563 to 663562. [2020-10-29 09:36:04,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 663562 states. [2020-10-29 09:36:06,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 663562 states to 663562 states and 770056 transitions. [2020-10-29 09:36:06,860 INFO L78 Accepts]: Start accepts. Automaton has 663562 states and 770056 transitions. Word has length 40 [2020-10-29 09:36:06,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-29 09:36:06,860 INFO L481 AbstractCegarLoop]: Abstraction has 663562 states and 770056 transitions. [2020-10-29 09:36:06,860 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-29 09:36:06,860 INFO L276 IsEmpty]: Start isEmpty. Operand 663562 states and 770056 transitions. [2020-10-29 09:36:07,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-29 09:36:07,298 INFO L414 BasicCegarLoop]: Found error trace [2020-10-29 09:36:07,298 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-29 09:36:07,298 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-29 09:36:07,298 INFO L429 AbstractCegarLoop]: === Iteration 40 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-29 09:36:07,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-29 09:36:07,300 INFO L82 PathProgramCache]: Analyzing trace with hash 520693861, now seen corresponding path program 1 times [2020-10-29 09:36:07,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-29 09:36:07,300 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [715659907] [2020-10-29 09:36:07,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-29 09:36:07,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:07,314 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:07,324 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:07,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:07,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-29 09:36:07,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-29 09:36:07,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 85 [2020-10-29 09:36:07,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:07,396 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:07,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-29 09:36:07,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-29 09:36:07,396 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-29 09:36:07,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:07,442 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-29 09:36:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-29 09:36:07,445 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-29 09:36:07,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-29 09:36:07,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-29 09:36:07,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-29 09:36:07,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-29 09:36:07,449 FATAL L256 erpolLogProxyWrapper]: Heuristic: SMALLESTAMONGWIDE [2020-10-29 09:36:07,449 FATAL L256 erpolLogProxyWrapper]: Tolerance: 0.3 [2020-10-29 09:36:07,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-29 09:36:07,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-29 09:36:07,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-29 09:36:07,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-29 09:36:07,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-29 09:36:07,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [715659907] [2020-10-29 09:36:07,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-29 09:36:07,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-29 09:36:07,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385207292] [2020-10-29 09:36:07,454 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-29 09:36:07,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-29 09:36:07,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-29 09:36:07,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-29 09:36:07,455 INFO L87 Difference]: Start difference. First operand 663562 states and 770056 transitions. Second operand 4 states. [2020-10-29 09:36:17,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-29 09:36:17,668 INFO L93 Difference]: Finished difference Result 995342 states and 1150987 transitions. [2020-10-29 09:36:17,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-29 09:36:17,670 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 41 [2020-10-29 09:36:17,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-29 09:36:18,906 INFO L225 Difference]: With dead ends: 995342 [2020-10-29 09:36:18,906 INFO L226 Difference]: Without dead ends: 671755 [2020-10-29 09:36:19,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-29 09:36:19,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 671755 states.