/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/eca-rers2012/Problem17_label44.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 00:16:46,700 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 00:16:46,703 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 00:16:46,740 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 00:16:46,740 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 00:16:46,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 00:16:46,744 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 00:16:46,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 00:16:46,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 00:16:46,754 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 00:16:46,755 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 00:16:46,757 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 00:16:46,758 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 00:16:46,759 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 00:16:46,761 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 00:16:46,762 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 00:16:46,764 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 00:16:46,765 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 00:16:46,767 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 00:16:46,770 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 00:16:46,772 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 00:16:46,774 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 00:16:46,776 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 00:16:46,777 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 00:16:46,781 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 00:16:46,781 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 00:16:46,782 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 00:16:46,783 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 00:16:46,783 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 00:16:46,785 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... 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[2020-10-27 00:16:46,792 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 00:16:46,794 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 00:16:46,795 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 00:16:46,796 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-27 00:16:46,857 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 00:16:46,858 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 00:16:46,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 00:16:46,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 00:16:46,862 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 00:16:46,864 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 00:16:46,865 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 00:16:46,865 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 00:16:46,865 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 00:16:46,865 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 00:16:46,865 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 00:16:46,866 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 00:16:46,866 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 00:16:46,866 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 00:16:46,866 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 00:16:46,866 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 00:16:46,866 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 00:16:46,867 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 00:16:46,867 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 00:16:46,868 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 00:16:46,868 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 00:16:46,869 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:16:46,869 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 00:16:46,869 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 00:16:46,869 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 00:16:46,869 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 00:16:46,870 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 00:16:46,870 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 00:16:46,870 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 00:16:46,870 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 00:16:47,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 00:16:47,384 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 00:16:47,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 00:16:47,390 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 00:16:47,391 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 00:16:47,393 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label44.c [2020-10-27 00:16:47,494 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd3aa4282/bffbdfde4b0345a5b00f7104ffdace8e/FLAGd84ca57c7 [2020-10-27 00:16:48,432 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 00:16:48,433 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label44.c [2020-10-27 00:16:48,462 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd3aa4282/bffbdfde4b0345a5b00f7104ffdace8e/FLAGd84ca57c7 [2020-10-27 00:16:48,986 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/fd3aa4282/bffbdfde4b0345a5b00f7104ffdace8e [2020-10-27 00:16:48,990 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 00:16:49,001 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 00:16:49,004 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 00:16:49,004 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 00:16:49,008 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 00:16:49,010 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:16:48" (1/1) ... [2020-10-27 00:16:49,015 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c74a02b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:49, skipping insertion in model container [2020-10-27 00:16:49,015 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 12:16:48" (1/1) ... [2020-10-27 00:16:49,025 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 00:16:49,155 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 00:16:50,299 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:16:50,315 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 00:16:50,765 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 00:16:50,794 INFO L208 MainTranslator]: Completed translation [2020-10-27 00:16:50,795 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50 WrapperNode [2020-10-27 00:16:50,795 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 00:16:50,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 00:16:50,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 00:16:50,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 00:16:50,813 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (1/1) ... [2020-10-27 00:16:50,815 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (1/1) ... [2020-10-27 00:16:50,894 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (1/1) ... [2020-10-27 00:16:50,895 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (1/1) ... [2020-10-27 00:16:50,985 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (1/1) ... [2020-10-27 00:16:51,005 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (1/1) ... [2020-10-27 00:16:51,040 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (1/1) ... [2020-10-27 00:16:51,077 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 00:16:51,078 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 00:16:51,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 00:16:51,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 00:16:51,080 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 00:16:51,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 00:16:51,171 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 00:16:51,171 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 00:16:51,171 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 00:16:51,172 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 00:16:51,172 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 00:16:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 00:16:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 00:16:51,172 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 00:16:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 00:16:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 00:16:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 00:16:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 00:16:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 00:16:51,173 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 00:16:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 00:16:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 00:16:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 00:16:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 00:16:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 00:16:51,174 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 00:17:00,816 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 00:17:00,817 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 00:17:00,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:17:00 BoogieIcfgContainer [2020-10-27 00:17:00,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 00:17:00,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 00:17:00,822 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 00:17:00,826 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 00:17:00,826 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 12:16:48" (1/3) ... [2020-10-27 00:17:00,827 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122502ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:17:00, skipping insertion in model container [2020-10-27 00:17:00,827 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 12:16:50" (2/3) ... [2020-10-27 00:17:00,828 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@122502ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 12:17:00, skipping insertion in model container [2020-10-27 00:17:00,828 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 12:17:00" (3/3) ... [2020-10-27 00:17:00,830 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label44.c [2020-10-27 00:17:00,844 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 00:17:00,851 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 00:17:00,867 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 00:17:00,902 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 00:17:00,903 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 00:17:00,903 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 00:17:00,903 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 00:17:00,903 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 00:17:00,904 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 00:17:00,904 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 00:17:00,904 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 00:17:00,938 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 00:17:00,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-27 00:17:00,948 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:00,949 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:00,949 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:00,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:00,957 INFO L82 PathProgramCache]: Analyzing trace with hash 409185706, now seen corresponding path program 1 times [2020-10-27 00:17:00,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:00,968 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1327020871] [2020-10-27 00:17:00,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:01,235 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:01,752 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:01,753 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-27 00:17:01,753 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:01,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 569 [2020-10-27 00:17:01,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:01,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:17:01,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:17:01,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-27 00:17:01,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-27 00:17:01,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:01,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:01,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:02,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:02,002 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:02,002 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:02,003 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 39 [2020-10-27 00:17:02,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:02,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:17:02,005 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:17:02,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:17:02,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1327020871] [2020-10-27 00:17:02,037 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:17:02,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 00:17:02,039 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178894931] [2020-10-27 00:17:02,046 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 00:17:02,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:02,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 00:17:02,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 00:17:02,073 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 00:17:16,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:16,857 INFO L93 Difference]: Finished difference Result 1694 states and 3089 transitions. [2020-10-27 00:17:16,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:17:16,861 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 42 [2020-10-27 00:17:16,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:16,892 INFO L225 Difference]: With dead ends: 1694 [2020-10-27 00:17:16,892 INFO L226 Difference]: Without dead ends: 1010 [2020-10-27 00:17:16,906 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:17:16,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1010 states. [2020-10-27 00:17:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1010 to 998. [2020-10-27 00:17:17,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 998 states. [2020-10-27 00:17:17,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 998 states to 998 states and 1492 transitions. [2020-10-27 00:17:17,037 INFO L78 Accepts]: Start accepts. Automaton has 998 states and 1492 transitions. Word has length 42 [2020-10-27 00:17:17,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:17,038 INFO L481 AbstractCegarLoop]: Abstraction has 998 states and 1492 transitions. [2020-10-27 00:17:17,038 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 00:17:17,038 INFO L276 IsEmpty]: Start isEmpty. Operand 998 states and 1492 transitions. [2020-10-27 00:17:17,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2020-10-27 00:17:17,044 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:17,045 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:17,045 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 00:17:17,046 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:17,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:17,047 INFO L82 PathProgramCache]: Analyzing trace with hash -151769929, now seen corresponding path program 1 times [2020-10-27 00:17:17,047 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:17,047 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512552592] [2020-10-27 00:17:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:17,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:17,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:17,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:18,405 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:18,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 128 [2020-10-27 00:17:18,408 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:17:18,408 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1268 [2020-10-27 00:17:18,409 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:17:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:17:18,410 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 00:17:18,411 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 00:17:18,616 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:18,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:18,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:18,659 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:18,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:18,664 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:18,664 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 00:17:18,664 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:18,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:18,665 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:17:18,665 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:18,695 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:18,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:19,079 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:19,086 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 00:17:19,087 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:19,087 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 335 [2020-10-27 00:17:19,087 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:19,087 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:17:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:17:19,088 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 00:17:19,088 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:19,299 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 9 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:17:19,328 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512552592] [2020-10-27 00:17:19,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:19,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:17:19,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746656359] [2020-10-27 00:17:19,334 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 00:17:19,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:19,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 00:17:19,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:17:19,336 INFO L87 Difference]: Start difference. First operand 998 states and 1492 transitions. Second operand 8 states. [2020-10-27 00:17:20,323 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 78 [2020-10-27 00:17:41,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:41,507 INFO L93 Difference]: Finished difference Result 3002 states and 4517 transitions. [2020-10-27 00:17:41,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:17:41,508 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 116 [2020-10-27 00:17:41,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:41,522 INFO L225 Difference]: With dead ends: 3002 [2020-10-27 00:17:41,523 INFO L226 Difference]: Without dead ends: 1967 [2020-10-27 00:17:41,528 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:17:41,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1967 states. [2020-10-27 00:17:41,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1967 to 1910. [2020-10-27 00:17:41,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1910 states. [2020-10-27 00:17:41,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1910 states to 1910 states and 2749 transitions. [2020-10-27 00:17:41,601 INFO L78 Accepts]: Start accepts. Automaton has 1910 states and 2749 transitions. Word has length 116 [2020-10-27 00:17:41,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:41,602 INFO L481 AbstractCegarLoop]: Abstraction has 1910 states and 2749 transitions. [2020-10-27 00:17:41,602 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 00:17:41,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1910 states and 2749 transitions. [2020-10-27 00:17:41,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-27 00:17:41,607 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:41,607 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:41,607 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 00:17:41,608 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:41,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:41,608 INFO L82 PathProgramCache]: Analyzing trace with hash -1872266422, now seen corresponding path program 1 times [2020-10-27 00:17:41,608 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:41,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1246624406] [2020-10-27 00:17:41,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:41,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:41,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:42,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:42,023 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 141 [2020-10-27 00:17:42,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:42,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-27 00:17:42,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:42,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:17:42,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:17:42,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-27 00:17:42,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:42,187 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:17:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:42,196 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:42,201 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:42,202 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:17:42,202 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:42,202 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 00:17:42,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:42,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:17:42,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:42,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:17:42,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:42,233 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:17:42,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:42,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:42,403 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:17:42,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:17:42,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:17:42,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 137 [2020-10-27 00:17:42,404 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:17:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:17:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:17:42,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:17:42,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:17:42,510 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:17:42,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1246624406] [2020-10-27 00:17:42,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:17:42,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 00:17:42,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848428398] [2020-10-27 00:17:42,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 00:17:42,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:17:42,513 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 00:17:42,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 00:17:42,514 INFO L87 Difference]: Start difference. First operand 1910 states and 2749 transitions. Second operand 5 states. [2020-10-27 00:17:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:17:58,718 INFO L93 Difference]: Finished difference Result 5605 states and 8170 transitions. [2020-10-27 00:17:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 00:17:58,719 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 129 [2020-10-27 00:17:58,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:17:58,741 INFO L225 Difference]: With dead ends: 5605 [2020-10-27 00:17:58,741 INFO L226 Difference]: Without dead ends: 3701 [2020-10-27 00:17:58,746 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:17:58,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2020-10-27 00:17:58,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 3675. [2020-10-27 00:17:58,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3675 states. [2020-10-27 00:17:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3675 states to 3675 states and 5308 transitions. [2020-10-27 00:17:58,873 INFO L78 Accepts]: Start accepts. Automaton has 3675 states and 5308 transitions. Word has length 129 [2020-10-27 00:17:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:17:58,874 INFO L481 AbstractCegarLoop]: Abstraction has 3675 states and 5308 transitions. [2020-10-27 00:17:58,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 00:17:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 3675 states and 5308 transitions. [2020-10-27 00:17:58,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2020-10-27 00:17:58,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:17:58,877 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:17:58,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 00:17:58,878 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:17:58,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:17:58,878 INFO L82 PathProgramCache]: Analyzing trace with hash -1394454716, now seen corresponding path program 1 times [2020-10-27 00:17:58,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:17:58,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159889057] [2020-10-27 00:17:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:17:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:17:58,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:59,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:59,222 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:17:59,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:00,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,132 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:01,132 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-27 00:18:01,132 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:18:01,134 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2214 [2020-10-27 00:18:01,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:18:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:01,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 100 [2020-10-27 00:18:01,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:01,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:01,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,299 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:01,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:01,300 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:01,300 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 23 [2020-10-27 00:18:01,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:01,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:01,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:01,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:01,301 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:01,338 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:01,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:01,381 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,449 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:01,628 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:01,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 97 [2020-10-27 00:18:01,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:18:01,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 264 [2020-10-27 00:18:01,629 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:01,629 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 97 [2020-10-27 00:18:01,629 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:01,778 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 00:18:01,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159889057] [2020-10-27 00:18:01,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 00:18:01,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-27 00:18:01,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552140221] [2020-10-27 00:18:01,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:18:01,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:01,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:18:01,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:18:01,793 INFO L87 Difference]: Start difference. First operand 3675 states and 5308 transitions. Second operand 7 states. [2020-10-27 00:18:01,966 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:18:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:17,637 INFO L93 Difference]: Finished difference Result 6090 states and 9190 transitions. [2020-10-27 00:18:17,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-27 00:18:17,643 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 138 [2020-10-27 00:18:17,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:17,665 INFO L225 Difference]: With dead ends: 6090 [2020-10-27 00:18:17,665 INFO L226 Difference]: Without dead ends: 2421 [2020-10-27 00:18:17,675 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:18:17,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2421 states. [2020-10-27 00:18:17,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2421 to 2352. [2020-10-27 00:18:17,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2352 states. [2020-10-27 00:18:17,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2352 states to 2352 states and 3697 transitions. [2020-10-27 00:18:17,763 INFO L78 Accepts]: Start accepts. Automaton has 2352 states and 3697 transitions. Word has length 138 [2020-10-27 00:18:17,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:17,763 INFO L481 AbstractCegarLoop]: Abstraction has 2352 states and 3697 transitions. [2020-10-27 00:18:17,763 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:18:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 2352 states and 3697 transitions. [2020-10-27 00:18:17,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2020-10-27 00:18:17,768 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:17,768 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:17,768 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 00:18:17,769 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:17,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:17,769 INFO L82 PathProgramCache]: Analyzing trace with hash -517862526, now seen corresponding path program 1 times [2020-10-27 00:18:17,770 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:17,770 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253281597] [2020-10-27 00:18:17,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:17,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:17,905 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:18,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:18,630 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:19,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:22,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:22,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 218 [2020-10-27 00:18:22,883 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:18:22,883 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-27 00:18:22,883 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:22,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:18:22,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:18:22,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 170 [2020-10-27 00:18:22,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:23,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:23,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:23,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:23,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:23,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:23,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:23,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 18 [2020-10-27 00:18:23,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:23,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:23,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:23,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:18:23,070 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:23,105 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:23,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:23,142 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:23,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:23,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:18:23,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:23,321 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 194 [2020-10-27 00:18:23,321 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:18:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:23,321 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:18:23,321 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:23,411 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:18:23,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:23,455 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:23,612 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:23,613 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 00:18:23,613 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:23,613 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-27 00:18:23,613 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:23,613 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:23,615 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:23,619 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 76 [2020-10-27 00:18:23,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-27 00:18:23,909 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 69 proven. 73 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:18:23,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253281597] [2020-10-27 00:18:23,910 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:23,910 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 00:18:23,910 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229937733] [2020-10-27 00:18:23,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:18:23,911 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:23,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:18:23,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:18:23,912 INFO L87 Difference]: Start difference. First operand 2352 states and 3697 transitions. Second operand 10 states. [2020-10-27 00:18:24,120 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 66 [2020-10-27 00:18:29,094 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 70 [2020-10-27 00:18:48,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:18:48,015 INFO L93 Difference]: Finished difference Result 5313 states and 8975 transitions. [2020-10-27 00:18:48,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-27 00:18:48,017 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 204 [2020-10-27 00:18:48,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:18:48,038 INFO L225 Difference]: With dead ends: 5313 [2020-10-27 00:18:48,039 INFO L226 Difference]: Without dead ends: 3400 [2020-10-27 00:18:48,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2020-10-27 00:18:48,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3400 states. [2020-10-27 00:18:48,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3400 to 2822. [2020-10-27 00:18:48,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2822 states. [2020-10-27 00:18:48,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2822 states to 2822 states and 4235 transitions. [2020-10-27 00:18:48,201 INFO L78 Accepts]: Start accepts. Automaton has 2822 states and 4235 transitions. Word has length 204 [2020-10-27 00:18:48,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:18:48,202 INFO L481 AbstractCegarLoop]: Abstraction has 2822 states and 4235 transitions. [2020-10-27 00:18:48,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-27 00:18:48,202 INFO L276 IsEmpty]: Start isEmpty. Operand 2822 states and 4235 transitions. [2020-10-27 00:18:48,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2020-10-27 00:18:48,207 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:18:48,207 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:18:48,207 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 00:18:48,207 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:18:48,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:18:48,208 INFO L82 PathProgramCache]: Analyzing trace with hash -330406214, now seen corresponding path program 1 times [2020-10-27 00:18:48,208 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:18:48,208 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2000209848] [2020-10-27 00:18:48,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:18:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:48,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:48,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:49,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:49,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 222 [2020-10-27 00:18:49,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:18:49,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1123 [2020-10-27 00:18:49,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:49,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:49,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:18:49,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:18:49,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:49,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:18:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:49,540 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:49,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:49,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:18:49,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:49,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-27 00:18:49,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:18:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:49,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:18:49,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:49,574 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:18:49,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:49,609 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:49,691 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:49,691 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:18:49,691 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-10-27 00:18:49,692 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:18:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:18:49,692 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:18:49,692 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:49,721 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:18:49,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:18:49,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:18:49,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:18:49,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-27 00:18:49,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:18:49,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 159 [2020-10-27 00:18:49,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:18:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:18:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:18:49,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 00:18:49,905 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:18:50,056 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 144 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 00:18:50,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2000209848] [2020-10-27 00:18:50,057 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:18:50,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:18:50,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747720774] [2020-10-27 00:18:50,058 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:18:50,058 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:18:50,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:18:50,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:18:50,059 INFO L87 Difference]: Start difference. First operand 2822 states and 4235 transitions. Second operand 7 states. [2020-10-27 00:18:55,873 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:19:07,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:07,603 INFO L93 Difference]: Finished difference Result 6258 states and 10438 transitions. [2020-10-27 00:19:07,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:19:07,606 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 208 [2020-10-27 00:19:07,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:07,631 INFO L225 Difference]: With dead ends: 6258 [2020-10-27 00:19:07,631 INFO L226 Difference]: Without dead ends: 4310 [2020-10-27 00:19:07,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:19:07,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4310 states. [2020-10-27 00:19:07,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4310 to 4224. [2020-10-27 00:19:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4224 states. [2020-10-27 00:19:07,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4224 states to 4224 states and 6176 transitions. [2020-10-27 00:19:07,787 INFO L78 Accepts]: Start accepts. Automaton has 4224 states and 6176 transitions. Word has length 208 [2020-10-27 00:19:07,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:07,787 INFO L481 AbstractCegarLoop]: Abstraction has 4224 states and 6176 transitions. [2020-10-27 00:19:07,787 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:19:07,787 INFO L276 IsEmpty]: Start isEmpty. Operand 4224 states and 6176 transitions. [2020-10-27 00:19:07,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2020-10-27 00:19:07,791 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:07,791 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:07,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 00:19:07,792 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:07,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash 2080481336, now seen corresponding path program 1 times [2020-10-27 00:19:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:07,793 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [224514827] [2020-10-27 00:19:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:07,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:07,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:08,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:08,155 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:12,902 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:12,903 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 229 [2020-10-27 00:19:12,903 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 00:19:12,903 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-27 00:19:12,903 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:12,903 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 00:19:12,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 128 [2020-10-27 00:19:12,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:13,061 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:13,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:13,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:13,072 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:13,072 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:13,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:13,073 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-27 00:19:13,073 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:13,073 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:13,074 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:13,074 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:13,104 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:13,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:13,146 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:13,221 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:13,221 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:13,221 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:13,221 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 91 [2020-10-27 00:19:13,222 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:13,222 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 00:19:13,222 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:13,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:13,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:13,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:13,457 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:13,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 00:19:13,457 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 00:19:13,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 183 [2020-10-27 00:19:13,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:13,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:13,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:13,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 00:19:13,458 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:13,565 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 115 proven. 34 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:19:13,565 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [224514827] [2020-10-27 00:19:13,566 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:13,566 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 00:19:13,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1172925140] [2020-10-27 00:19:13,567 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 00:19:13,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:13,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 00:19:13,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-27 00:19:13,569 INFO L87 Difference]: Start difference. First operand 4224 states and 6176 transitions. Second operand 6 states. [2020-10-27 00:19:14,234 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:19:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:27,410 INFO L93 Difference]: Finished difference Result 7640 states and 12146 transitions. [2020-10-27 00:19:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-27 00:19:27,413 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 215 [2020-10-27 00:19:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:27,438 INFO L225 Difference]: With dead ends: 7640 [2020-10-27 00:19:27,438 INFO L226 Difference]: Without dead ends: 4729 [2020-10-27 00:19:27,448 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-27 00:19:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4729 states. [2020-10-27 00:19:27,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4729 to 4235. [2020-10-27 00:19:27,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4235 states. [2020-10-27 00:19:27,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4235 states to 4235 states and 6194 transitions. [2020-10-27 00:19:27,607 INFO L78 Accepts]: Start accepts. Automaton has 4235 states and 6194 transitions. Word has length 215 [2020-10-27 00:19:27,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:27,607 INFO L481 AbstractCegarLoop]: Abstraction has 4235 states and 6194 transitions. [2020-10-27 00:19:27,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 00:19:27,608 INFO L276 IsEmpty]: Start isEmpty. Operand 4235 states and 6194 transitions. [2020-10-27 00:19:27,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2020-10-27 00:19:27,610 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:27,610 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:27,611 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 00:19:27,611 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:27,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:27,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1819591529, now seen corresponding path program 1 times [2020-10-27 00:19:27,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:27,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1648884498] [2020-10-27 00:19:27,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:27,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:27,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:27,767 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:28,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:29,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:32,593 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:32,673 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:32,673 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 242 [2020-10-27 00:19:32,673 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-27 00:19:32,673 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-27 00:19:32,673 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 00:19:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:32,674 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 121 [2020-10-27 00:19:32,674 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:32,833 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 00:19:32,835 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:32,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:32,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:32,869 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:32,869 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:32,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 27 [2020-10-27 00:19:32,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:32,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:32,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:32,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:32,871 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:32,916 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:32,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:32,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:33,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:33,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 116 [2020-10-27 00:19:33,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:33,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 342 [2020-10-27 00:19:33,298 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:33,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:33,298 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:33,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 116 [2020-10-27 00:19:33,299 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:33,406 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2020-10-27 00:19:33,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:33,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:33,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:33,468 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:19:33,468 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:33,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 45 [2020-10-27 00:19:33,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:19:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:19:33,469 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:19:33,469 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:33,554 INFO L134 CoverageAnalysis]: Checked inductivity of 139 backedges. 68 proven. 66 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2020-10-27 00:19:33,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1648884498] [2020-10-27 00:19:33,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:19:33,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 00:19:33,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118626664] [2020-10-27 00:19:33,556 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 00:19:33,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:19:33,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 00:19:33,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 00:19:33,558 INFO L87 Difference]: Start difference. First operand 4235 states and 6194 transitions. Second operand 7 states. [2020-10-27 00:19:33,712 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:19:54,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 00:19:54,041 INFO L93 Difference]: Finished difference Result 8495 states and 12886 transitions. [2020-10-27 00:19:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 00:19:54,044 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 228 [2020-10-27 00:19:54,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 00:19:54,076 INFO L225 Difference]: With dead ends: 8495 [2020-10-27 00:19:54,077 INFO L226 Difference]: Without dead ends: 4701 [2020-10-27 00:19:54,087 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 00:19:54,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4701 states. [2020-10-27 00:19:54,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4701 to 4633. [2020-10-27 00:19:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4633 states. [2020-10-27 00:19:54,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 6177 transitions. [2020-10-27 00:19:54,210 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 6177 transitions. Word has length 228 [2020-10-27 00:19:54,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 00:19:54,211 INFO L481 AbstractCegarLoop]: Abstraction has 4633 states and 6177 transitions. [2020-10-27 00:19:54,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 00:19:54,211 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 6177 transitions. [2020-10-27 00:19:54,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2020-10-27 00:19:54,216 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 00:19:54,217 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 00:19:54,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 00:19:54,217 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 00:19:54,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 00:19:54,218 INFO L82 PathProgramCache]: Analyzing trace with hash 1458282469, now seen corresponding path program 1 times [2020-10-27 00:19:54,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 00:19:54,223 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1581677038] [2020-10-27 00:19:54,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 00:19:54,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:54,325 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:54,410 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:54,796 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:56,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:59,323 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:59,323 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 294 [2020-10-27 00:19:59,323 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-27 00:19:59,323 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-27 00:19:59,324 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 00:19:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 00:19:59,324 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 173 [2020-10-27 00:19:59,324 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:59,484 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 00:19:59,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:59,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:59,501 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:59,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 00:19:59,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:59,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 11 [2020-10-27 00:19:59,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:59,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 00:19:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 00:19:59,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 00:19:59,503 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 00:19:59,540 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 00:19:59,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:59,577 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:59,747 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:59,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 00:19:59,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:59,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 184 [2020-10-27 00:19:59,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 00:19:59,748 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:59,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 00:19:59,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:19:59,826 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 00:19:59,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:19:59,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:19:59,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:19:59,964 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-27 00:19:59,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:19:59,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 115 [2020-10-27 00:19:59,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:19:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 00:19:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 00:19:59,965 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 00:19:59,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:00,044 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2020-10-27 00:20:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 00:20:00,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 00:20:00,098 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 00:20:00,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 00:20:00,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 00:20:00,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 37 [2020-10-27 00:20:00,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-27 00:20:00,099 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 00:20:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 69 [2020-10-27 00:20:00,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 00:20:00,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 00:20:00,256 INFO L134 CoverageAnalysis]: Checked inductivity of 322 backedges. 110 proven. 205 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2020-10-27 00:20:00,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1581677038] [2020-10-27 00:20:00,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 00:20:00,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-27 00:20:00,258 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392708487] [2020-10-27 00:20:00,259 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 00:20:00,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 00:20:00,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 00:20:00,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-27 00:20:00,261 INFO L87 Difference]: Start difference. First operand 4633 states and 6177 transitions. Second operand 10 states. [2020-10-27 00:20:00,434 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 66 [2020-10-27 00:20:01,521 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 68 [2020-10-27 00:20:07,137 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 70