/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=DEEPEST --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_label00.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-27 18:47:08,688 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-27 18:47:08,691 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-27 18:47:08,750 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-27 18:47:08,751 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-27 18:47:08,758 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-27 18:47:08,760 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-27 18:47:08,765 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-27 18:47:08,768 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-27 18:47:08,774 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-27 18:47:08,775 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-27 18:47:08,777 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-27 18:47:08,777 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-27 18:47:08,780 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-27 18:47:08,784 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-27 18:47:08,786 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-27 18:47:08,787 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-27 18:47:08,791 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-27 18:47:08,799 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-27 18:47:08,806 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-27 18:47:08,810 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-27 18:47:08,812 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-27 18:47:08,813 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-27 18:47:08,817 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-27 18:47:08,822 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-27 18:47:08,823 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-27 18:47:08,823 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-27 18:47:08,829 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-27 18:47:08,830 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-27 18:47:08,830 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-27 18:47:08,831 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-27 18:47:08,832 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-27 18:47:08,833 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-27 18:47:08,834 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-27 18:47:08,836 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-27 18:47:08,836 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-27 18:47:08,837 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-27 18:47:08,837 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-27 18:47:08,837 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-27 18:47:08,839 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-27 18:47:08,840 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-27 18:47:08,844 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 18:47:08,894 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-27 18:47:08,894 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-27 18:47:08,899 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-27 18:47:08,900 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-27 18:47:08,900 INFO L138 SettingsManager]: * Use SBE=true [2020-10-27 18:47:08,900 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-27 18:47:08,900 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-27 18:47:08,901 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-27 18:47:08,901 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-27 18:47:08,901 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-27 18:47:08,901 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-27 18:47:08,901 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-27 18:47:08,902 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-27 18:47:08,902 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-27 18:47:08,902 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-27 18:47:08,903 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-27 18:47:08,903 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-27 18:47:08,903 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-27 18:47:08,904 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-27 18:47:08,904 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-27 18:47:08,904 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-27 18:47:08,904 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-27 18:47:08,905 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-27 18:47:08,905 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-27 18:47:08,905 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-27 18:47:08,905 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-27 18:47:08,905 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-27 18:47:08,906 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-27 18:47:08,906 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-27 18:47:08,907 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=DEEPEST;log-additional-information=true;unknown-allowed=true; [2020-10-27 18:47:09,302 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-27 18:47:09,344 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-27 18:47:09,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-27 18:47:09,348 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-27 18:47:09,349 INFO L275 PluginConnector]: CDTParser initialized [2020-10-27 18:47:09,353 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem17_label00.c [2020-10-27 18:47:09,439 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c5fe15c9/2fba305ccdfd410a90343b94e7d78fad/FLAGe7091c7be [2020-10-27 18:47:10,517 INFO L306 CDTParser]: Found 1 translation units. [2020-10-27 18:47:10,518 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/eca-rers2012/Problem17_label00.c [2020-10-27 18:47:10,547 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c5fe15c9/2fba305ccdfd410a90343b94e7d78fad/FLAGe7091c7be [2020-10-27 18:47:11,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/6c5fe15c9/2fba305ccdfd410a90343b94e7d78fad [2020-10-27 18:47:11,023 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-27 18:47:11,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-27 18:47:11,032 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-27 18:47:11,032 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-27 18:47:11,036 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-27 18:47:11,037 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:47:11" (1/1) ... [2020-10-27 18:47:11,041 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24b223a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:11, skipping insertion in model container [2020-10-27 18:47:11,041 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.10 06:47:11" (1/1) ... [2020-10-27 18:47:11,050 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-27 18:47:11,143 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-27 18:47:12,247 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:47:12,258 INFO L203 MainTranslator]: Completed pre-run [2020-10-27 18:47:12,662 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-27 18:47:12,689 INFO L208 MainTranslator]: Completed translation [2020-10-27 18:47:12,690 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12 WrapperNode [2020-10-27 18:47:12,690 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-27 18:47:12,691 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-27 18:47:12,691 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-27 18:47:12,691 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-27 18:47:12,707 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (1/1) ... [2020-10-27 18:47:12,709 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (1/1) ... [2020-10-27 18:47:12,781 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (1/1) ... [2020-10-27 18:47:12,781 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (1/1) ... [2020-10-27 18:47:12,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (1/1) ... [2020-10-27 18:47:12,918 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (1/1) ... [2020-10-27 18:47:12,953 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (1/1) ... [2020-10-27 18:47:12,989 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-27 18:47:12,991 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-27 18:47:12,991 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-27 18:47:12,991 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-27 18:47:12,992 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (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 18:47:13,065 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-27 18:47:13,066 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-27 18:47:13,066 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-27 18:47:13,066 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2020-10-27 18:47:13,066 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2020-10-27 18:47:13,066 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-27 18:47:13,066 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2020-10-27 18:47:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2020-10-27 18:47:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-27 18:47:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-27 18:47:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-27 18:47:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-27 18:47:13,067 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-27 18:47:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2020-10-27 18:47:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-27 18:47:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-27 18:47:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-27 18:47:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-27 18:47:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-27 18:47:13,068 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-27 18:47:13,069 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-27 18:47:22,108 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-27 18:47:22,108 INFO L298 CfgBuilder]: Removed 1 assume(true) statements. [2020-10-27 18:47:22,111 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:47:22 BoogieIcfgContainer [2020-10-27 18:47:22,111 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-27 18:47:22,113 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-27 18:47:22,113 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-27 18:47:22,117 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-27 18:47:22,117 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.10 06:47:11" (1/3) ... [2020-10-27 18:47:22,118 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40af2d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:47:22, skipping insertion in model container [2020-10-27 18:47:22,118 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.10 06:47:12" (2/3) ... [2020-10-27 18:47:22,119 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40af2d1a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.10 06:47:22, skipping insertion in model container [2020-10-27 18:47:22,119 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.10 06:47:22" (3/3) ... [2020-10-27 18:47:22,121 INFO L111 eAbstractionObserver]: Analyzing ICFG Problem17_label00.c [2020-10-27 18:47:22,134 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-27 18:47:22,141 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-27 18:47:22,155 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-27 18:47:22,187 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-27 18:47:22,188 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-27 18:47:22,188 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-27 18:47:22,188 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-27 18:47:22,188 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-27 18:47:22,188 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-27 18:47:22,188 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-27 18:47:22,189 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-27 18:47:22,220 INFO L276 IsEmpty]: Start isEmpty. Operand 607 states. [2020-10-27 18:47:22,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-27 18:47:22,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:47:22,233 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:47:22,234 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:47:22,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:47:22,241 INFO L82 PathProgramCache]: Analyzing trace with hash 759334979, now seen corresponding path program 1 times [2020-10-27 18:47:22,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:47:22,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150286707] [2020-10-27 18:47:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:47:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:22,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:23,128 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:23,129 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-10-27 18:47:23,129 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:47:23,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 660 [2020-10-27 18:47:23,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:23,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-27 18:47:23,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:47:23,132 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-27 18:47:23,132 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-10-27 18:47:23,319 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:47:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:23,354 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:23,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:23,405 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:47:23,405 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:47:23,406 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 57 [2020-10-27 18:47:23,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:23,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:47:23,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:47:23,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:47:23,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:47:23,446 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 18:47:23,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150286707] [2020-10-27 18:47:23,450 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-27 18:47:23,450 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-27 18:47:23,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989681325] [2020-10-27 18:47:23,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-27 18:47:23,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:47:23,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-27 18:47:23,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-27 18:47:23,483 INFO L87 Difference]: Start difference. First operand 607 states. Second operand 4 states. [2020-10-27 18:47:38,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:47:38,850 INFO L93 Difference]: Finished difference Result 1697 states and 3097 transitions. [2020-10-27 18:47:38,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:47:38,855 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 61 [2020-10-27 18:47:38,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:47:38,880 INFO L225 Difference]: With dead ends: 1697 [2020-10-27 18:47:38,880 INFO L226 Difference]: Without dead ends: 1013 [2020-10-27 18:47:38,894 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 18:47:38,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1013 states. [2020-10-27 18:47:39,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1013 to 1003. [2020-10-27 18:47:39,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1003 states. [2020-10-27 18:47:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1543 transitions. [2020-10-27 18:47:39,045 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1543 transitions. Word has length 61 [2020-10-27 18:47:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:47:39,046 INFO L481 AbstractCegarLoop]: Abstraction has 1003 states and 1543 transitions. [2020-10-27 18:47:39,046 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-27 18:47:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1543 transitions. [2020-10-27 18:47:39,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-27 18:47:39,054 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:47:39,054 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, 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] [2020-10-27 18:47:39,055 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-27 18:47:39,055 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:47:39,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:47:39,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1732491678, now seen corresponding path program 1 times [2020-10-27 18:47:39,056 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:47:39,056 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683891484] [2020-10-27 18:47:39,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:47:39,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:39,151 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:39,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:40,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:40,892 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:40,892 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 144 [2020-10-27 18:47:40,892 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:47:40,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1779 [2020-10-27 18:47:40,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:40,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:47:40,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 81 [2020-10-27 18:47:40,895 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:47:40,895 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:47:41,056 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:47:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:41,067 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:41,088 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:41,088 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:47:41,088 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:47:41,089 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 22 [2020-10-27 18:47:41,090 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:47:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:47:41,090 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:47:41,091 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:47:41,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:47:41,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:41,172 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:41,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:41,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-27 18:47:41,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:47:41,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 123 [2020-10-27 18:47:41,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:41,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:47:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:47:41,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-27 18:47:41,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:47:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:47:41,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683891484] [2020-10-27 18:47:41,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:47:41,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:47:41,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182371287] [2020-10-27 18:47:41,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:47:41,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:47:41,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:47:41,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:47:41,367 INFO L87 Difference]: Start difference. First operand 1003 states and 1543 transitions. Second operand 5 states. [2020-10-27 18:47:51,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:47:51,764 INFO L93 Difference]: Finished difference Result 2922 states and 4546 transitions. [2020-10-27 18:47:51,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:47:51,767 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 132 [2020-10-27 18:47:51,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:47:51,780 INFO L225 Difference]: With dead ends: 2922 [2020-10-27 18:47:51,780 INFO L226 Difference]: Without dead ends: 1925 [2020-10-27 18:47:51,784 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 18:47:51,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1925 states. [2020-10-27 18:47:51,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1925 to 1898. [2020-10-27 18:47:51,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1898 states. [2020-10-27 18:47:51,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1898 states to 1898 states and 2705 transitions. [2020-10-27 18:47:51,852 INFO L78 Accepts]: Start accepts. Automaton has 1898 states and 2705 transitions. Word has length 132 [2020-10-27 18:47:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:47:51,853 INFO L481 AbstractCegarLoop]: Abstraction has 1898 states and 2705 transitions. [2020-10-27 18:47:51,853 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:47:51,853 INFO L276 IsEmpty]: Start isEmpty. Operand 1898 states and 2705 transitions. [2020-10-27 18:47:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2020-10-27 18:47:51,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:47:51,860 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, 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] [2020-10-27 18:47:51,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-27 18:47:51,860 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:47:51,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:47:51,861 INFO L82 PathProgramCache]: Analyzing trace with hash -1047342761, now seen corresponding path program 1 times [2020-10-27 18:47:51,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:47:51,861 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [342406700] [2020-10-27 18:47:51,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:47:51,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:51,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:52,133 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:53,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:53,852 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-27 18:47:53,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:47:53,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1932 [2020-10-27 18:47:53,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:53,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 18:47:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:47:53,853 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-27 18:47:53,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:47:54,029 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:47:54,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:54,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:54,073 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:54,073 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:47:54,073 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:47:54,076 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-10-27 18:47:54,076 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:47:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:47:54,077 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:47:54,077 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:47:54,111 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:47:54,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:47:54,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:47:54,351 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:47:54,351 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-27 18:47:54,352 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:47:54,352 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 202 [2020-10-27 18:47:54,352 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:47:54,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:47:54,352 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:47:54,353 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 75 [2020-10-27 18:47:54,353 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:47:54,542 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 28 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:47:54,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [342406700] [2020-10-27 18:47:54,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:47:54,545 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:47:54,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013053704] [2020-10-27 18:47:54,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-27 18:47:54,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:47:54,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-27 18:47:54,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-27 18:47:54,550 INFO L87 Difference]: Start difference. First operand 1898 states and 2705 transitions. Second operand 8 states. [2020-10-27 18:48:13,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:13,902 INFO L93 Difference]: Finished difference Result 5183 states and 7552 transitions. [2020-10-27 18:48:13,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-27 18:48:13,903 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 135 [2020-10-27 18:48:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:13,922 INFO L225 Difference]: With dead ends: 5183 [2020-10-27 18:48:13,923 INFO L226 Difference]: Without dead ends: 3260 [2020-10-27 18:48:13,929 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-27 18:48:13,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3260 states. [2020-10-27 18:48:14,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3260 to 3233. [2020-10-27 18:48:14,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3233 states. [2020-10-27 18:48:14,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3233 states to 3233 states and 4071 transitions. [2020-10-27 18:48:14,047 INFO L78 Accepts]: Start accepts. Automaton has 3233 states and 4071 transitions. Word has length 135 [2020-10-27 18:48:14,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:14,048 INFO L481 AbstractCegarLoop]: Abstraction has 3233 states and 4071 transitions. [2020-10-27 18:48:14,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-27 18:48:14,048 INFO L276 IsEmpty]: Start isEmpty. Operand 3233 states and 4071 transitions. [2020-10-27 18:48:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2020-10-27 18:48:14,058 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:14,059 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, 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] [2020-10-27 18:48:14,059 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-27 18:48:14,059 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:14,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1592304386, now seen corresponding path program 1 times [2020-10-27 18:48:14,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:14,063 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1752683925] [2020-10-27 18:48:14,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:14,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:14,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:14,493 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:14,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-27 18:48:14,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:14,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 358 [2020-10-27 18:48:14,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:14,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:14,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 18:48:14,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:48:14,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-27 18:48:14,611 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:14,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:14,616 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:14,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:14,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:14,631 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:14,631 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14 [2020-10-27 18:48:14,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:14,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:48:14,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:14,632 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:48:14,632 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:14,647 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:14,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:14,690 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:14,775 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:14,775 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:48:14,775 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:14,775 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 101 [2020-10-27 18:48:14,776 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:14,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 18:48:14,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:14,868 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 52 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-27 18:48:14,868 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1752683925] [2020-10-27 18:48:14,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:14,869 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:48:14,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894120446] [2020-10-27 18:48:14,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:48:14,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:14,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:48:14,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:14,872 INFO L87 Difference]: Start difference. First operand 3233 states and 4071 transitions. Second operand 5 states. [2020-10-27 18:48:27,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:27,405 INFO L93 Difference]: Finished difference Result 6922 states and 9419 transitions. [2020-10-27 18:48:27,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:48:27,408 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 148 [2020-10-27 18:48:27,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:27,434 INFO L225 Difference]: With dead ends: 6922 [2020-10-27 18:48:27,434 INFO L226 Difference]: Without dead ends: 5004 [2020-10-27 18:48:27,441 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 18:48:27,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5004 states. [2020-10-27 18:48:27,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5004 to 4135. [2020-10-27 18:48:27,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4135 states. [2020-10-27 18:48:27,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4135 states to 4135 states and 5498 transitions. [2020-10-27 18:48:27,590 INFO L78 Accepts]: Start accepts. Automaton has 4135 states and 5498 transitions. Word has length 148 [2020-10-27 18:48:27,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:27,591 INFO L481 AbstractCegarLoop]: Abstraction has 4135 states and 5498 transitions. [2020-10-27 18:48:27,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:48:27,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4135 states and 5498 transitions. [2020-10-27 18:48:27,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-27 18:48:27,595 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:27,595 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, 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, 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 18:48:27,596 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-27 18:48:27,596 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:27,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:27,596 INFO L82 PathProgramCache]: Analyzing trace with hash -752052085, now seen corresponding path program 1 times [2020-10-27 18:48:27,598 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:27,598 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [612903994] [2020-10-27 18:48:27,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:27,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:27,699 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:27,919 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:28,578 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:31,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:31,501 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 237 [2020-10-27 18:48:31,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:48:31,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3841 [2020-10-27 18:48:31,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:31,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 174 [2020-10-27 18:48:31,502 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:48:31,502 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:31,644 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:31,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:31,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:31,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:31,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:31,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:31,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:48:31,654 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:48:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:31,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:48:31,655 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:31,673 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:31,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:31,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:31,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:31,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:48:31,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:31,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 35 [2020-10-27 18:48:31,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:31,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:48:31,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:31,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:48:31,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:31,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:48:31,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:31,794 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:31,877 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:31,877 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-10-27 18:48:31,877 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:31,877 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 98 [2020-10-27 18:48:31,878 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:31,878 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-27 18:48:31,878 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:31,963 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-27 18:48:31,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [612903994] [2020-10-27 18:48:31,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:31,965 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:48:31,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779015155] [2020-10-27 18:48:31,968 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:48:31,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:31,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:48:31,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:48:31,969 INFO L87 Difference]: Start difference. First operand 4135 states and 5498 transitions. Second operand 5 states. [2020-10-27 18:48:47,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:48:47,453 INFO L93 Difference]: Finished difference Result 9595 states and 13776 transitions. [2020-10-27 18:48:47,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:48:47,455 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 223 [2020-10-27 18:48:47,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:48:47,492 INFO L225 Difference]: With dead ends: 9595 [2020-10-27 18:48:47,492 INFO L226 Difference]: Without dead ends: 6775 [2020-10-27 18:48:47,503 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 1 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 18:48:47,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2020-10-27 18:48:47,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 6772. [2020-10-27 18:48:47,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6772 states. [2020-10-27 18:48:47,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6772 states to 6772 states and 8541 transitions. [2020-10-27 18:48:47,778 INFO L78 Accepts]: Start accepts. Automaton has 6772 states and 8541 transitions. Word has length 223 [2020-10-27 18:48:47,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:48:47,779 INFO L481 AbstractCegarLoop]: Abstraction has 6772 states and 8541 transitions. [2020-10-27 18:48:47,779 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:48:47,780 INFO L276 IsEmpty]: Start isEmpty. Operand 6772 states and 8541 transitions. [2020-10-27 18:48:47,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2020-10-27 18:48:47,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:48:47,784 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, 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, 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 18:48:47,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-27 18:48:47,785 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:48:47,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:48:47,785 INFO L82 PathProgramCache]: Analyzing trace with hash -215848198, now seen corresponding path program 1 times [2020-10-27 18:48:47,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:48:47,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [503542732] [2020-10-27 18:48:47,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:48:47,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:47,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:48,356 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:48,356 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 238 [2020-10-27 18:48:48,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:48,357 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 489 [2020-10-27 18:48:48,357 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:48,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:48,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-27 18:48:48,357 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 79 [2020-10-27 18:48:48,358 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:48,555 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2020-10-27 18:48:48,556 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:48:48,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:48,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:48,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:48,565 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:48:48,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:48,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:48:48,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:48:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:48,566 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:48:48,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:48,588 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:48:48,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:48,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:48,715 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:48,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:48:48,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:48,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:48:48,716 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:48,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:48:48,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:48:48,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-10-27 18:48:48,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:48,760 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:48:48,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:48:48,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:48:48,936 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:48:48,937 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-27 18:48:48,937 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:48:48,937 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 153 [2020-10-27 18:48:48,937 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:48:48,937 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:48:48,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:48:48,938 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-27 18:48:48,938 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:48:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 179 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:48:49,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [503542732] [2020-10-27 18:48:49,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:48:49,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-27 18:48:49,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445393247] [2020-10-27 18:48:49,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-27 18:48:49,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:48:49,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-27 18:48:49,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:48:49,055 INFO L87 Difference]: Start difference. First operand 6772 states and 8541 transitions. Second operand 7 states. [2020-10-27 18:49:08,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:08,183 INFO L93 Difference]: Finished difference Result 15119 states and 20358 transitions. [2020-10-27 18:49:08,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-27 18:49:08,185 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 224 [2020-10-27 18:49:08,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:08,237 INFO L225 Difference]: With dead ends: 15119 [2020-10-27 18:49:08,237 INFO L226 Difference]: Without dead ends: 9662 [2020-10-27 18:49:08,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-27 18:49:08,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9662 states. [2020-10-27 18:49:08,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9662 to 9641. [2020-10-27 18:49:08,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9641 states. [2020-10-27 18:49:08,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9641 states to 9641 states and 12306 transitions. [2020-10-27 18:49:08,514 INFO L78 Accepts]: Start accepts. Automaton has 9641 states and 12306 transitions. Word has length 224 [2020-10-27 18:49:08,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:08,514 INFO L481 AbstractCegarLoop]: Abstraction has 9641 states and 12306 transitions. [2020-10-27 18:49:08,515 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-27 18:49:08,515 INFO L276 IsEmpty]: Start isEmpty. Operand 9641 states and 12306 transitions. [2020-10-27 18:49:08,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2020-10-27 18:49:08,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:08,520 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:08,521 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-27 18:49:08,521 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:08,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:08,521 INFO L82 PathProgramCache]: Analyzing trace with hash 201088927, now seen corresponding path program 1 times [2020-10-27 18:49:08,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:08,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582865928] [2020-10-27 18:49:08,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:08,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:08,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:09,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:09,546 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:09,547 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 247 [2020-10-27 18:49:09,547 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:49:09,547 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 960 [2020-10-27 18:49:09,547 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:09,547 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:09,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 184 [2020-10-27 18:49:09,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:49:09,548 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:09,748 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:09,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:09,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:09,761 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:09,762 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:09,762 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:09,762 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-10-27 18:49:09,763 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:09,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:09,763 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:09,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:09,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:49:09,789 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:09,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:09,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:09,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:09,831 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:49:09,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:09,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:49:09,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:09,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:09,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:09,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:09,861 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:49:09,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:09,898 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:09,977 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:09,977 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-10-27 18:49:09,978 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:09,978 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 93 [2020-10-27 18:49:09,978 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:09,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:09,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:09,978 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 80 [2020-10-27 18:49:09,979 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:10,060 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2020-10-27 18:49:10,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582865928] [2020-10-27 18:49:10,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:10,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:49:10,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412236764] [2020-10-27 18:49:10,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:49:10,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:10,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:49:10,063 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:49:10,063 INFO L87 Difference]: Start difference. First operand 9641 states and 12306 transitions. Second operand 5 states. [2020-10-27 18:49:25,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:25,332 INFO L93 Difference]: Finished difference Result 22009 states and 29881 transitions. [2020-10-27 18:49:25,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:25,335 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 233 [2020-10-27 18:49:25,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:25,388 INFO L225 Difference]: With dead ends: 22009 [2020-10-27 18:49:25,388 INFO L226 Difference]: Without dead ends: 13683 [2020-10-27 18:49:25,452 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 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 18:49:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13683 states. [2020-10-27 18:49:25,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13683 to 13228. [2020-10-27 18:49:25,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13228 states. [2020-10-27 18:49:25,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13228 states to 13228 states and 17653 transitions. [2020-10-27 18:49:25,812 INFO L78 Accepts]: Start accepts. Automaton has 13228 states and 17653 transitions. Word has length 233 [2020-10-27 18:49:25,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:25,813 INFO L481 AbstractCegarLoop]: Abstraction has 13228 states and 17653 transitions. [2020-10-27 18:49:25,813 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:49:25,813 INFO L276 IsEmpty]: Start isEmpty. Operand 13228 states and 17653 transitions. [2020-10-27 18:49:25,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2020-10-27 18:49:25,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:25,818 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:25,819 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-27 18:49:25,819 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:25,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:25,820 INFO L82 PathProgramCache]: Analyzing trace with hash -441705003, now seen corresponding path program 1 times [2020-10-27 18:49:25,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:25,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616504537] [2020-10-27 18:49:25,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:25,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:26,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:26,154 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:30,919 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:30,920 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 248 [2020-10-27 18:49:30,920 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:49:30,920 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-27 18:49:30,920 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:30,920 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:30,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 185 [2020-10-27 18:49:30,921 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:49:30,921 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:31,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:31,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:31,106 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:31,111 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:31,111 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:31,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:31,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:49:31,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:31,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:31,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:31,113 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:31,113 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-27 18:49:31,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:31,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:31,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:31,176 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:31,177 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:49:31,177 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:31,177 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:49:31,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:31,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:31,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:31,207 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:49:31,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:31,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:31,355 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:31,355 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-10-27 18:49:31,356 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:31,356 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 122 [2020-10-27 18:49:31,356 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:31,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:31,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:31,356 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 81 [2020-10-27 18:49:31,356 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:31,487 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 83 trivial. 0 not checked. [2020-10-27 18:49:31,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616504537] [2020-10-27 18:49:31,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:31,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-27 18:49:31,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888813898] [2020-10-27 18:49:31,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-27 18:49:31,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:31,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-27 18:49:31,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:49:31,491 INFO L87 Difference]: Start difference. First operand 13228 states and 17653 transitions. Second operand 6 states. [2020-10-27 18:49:46,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:49:46,122 INFO L93 Difference]: Finished difference Result 29066 states and 39624 transitions. [2020-10-27 18:49:46,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:49:46,123 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 234 [2020-10-27 18:49:46,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:49:46,197 INFO L225 Difference]: With dead ends: 29066 [2020-10-27 18:49:46,197 INFO L226 Difference]: Without dead ends: 17153 [2020-10-27 18:49:46,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-27 18:49:46,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17153 states. [2020-10-27 18:49:46,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17153 to 13677. [2020-10-27 18:49:46,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13677 states. [2020-10-27 18:49:46,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13677 states to 13677 states and 18667 transitions. [2020-10-27 18:49:46,635 INFO L78 Accepts]: Start accepts. Automaton has 13677 states and 18667 transitions. Word has length 234 [2020-10-27 18:49:46,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:49:46,636 INFO L481 AbstractCegarLoop]: Abstraction has 13677 states and 18667 transitions. [2020-10-27 18:49:46,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-27 18:49:46,636 INFO L276 IsEmpty]: Start isEmpty. Operand 13677 states and 18667 transitions. [2020-10-27 18:49:46,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2020-10-27 18:49:46,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:49:46,642 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:49:46,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-27 18:49:46,642 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:49:46,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:49:46,643 INFO L82 PathProgramCache]: Analyzing trace with hash 149154849, now seen corresponding path program 1 times [2020-10-27 18:49:46,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:49:46,643 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397002304] [2020-10-27 18:49:46,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:49:46,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:46,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:47,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:47,764 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:47,765 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 254 [2020-10-27 18:49:47,765 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-27 18:49:47,765 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1057 [2020-10-27 18:49:47,765 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:47,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:49:47,765 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 191 [2020-10-27 18:49:47,766 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:49:47,766 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:47,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:49:47,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:47,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:47,949 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:47,949 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:49:47,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:47,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-27 18:49:47,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:47,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:47,950 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:47,977 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:49:47,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:47,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:48,017 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:48,017 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:49:48,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:48,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 32 [2020-10-27 18:49:48,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:49:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:48,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:49:48,018 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:48,047 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:49:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:49:48,095 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:49:48,184 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:49:48,185 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-27 18:49:48,185 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:49:48,185 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 107 [2020-10-27 18:49:48,185 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:49:48,185 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:49:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:49:48,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 87 [2020-10-27 18:49:48,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:49:48,336 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:49:48,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397002304] [2020-10-27 18:49:48,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:49:48,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:49:48,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148675087] [2020-10-27 18:49:48,342 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:49:48,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:49:48,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:49:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:49:48,344 INFO L87 Difference]: Start difference. First operand 13677 states and 18667 transitions. Second operand 5 states. [2020-10-27 18:50:11,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:11,467 INFO L93 Difference]: Finished difference Result 33678 states and 48215 transitions. [2020-10-27 18:50:11,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:50:11,470 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 240 [2020-10-27 18:50:11,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:11,561 INFO L225 Difference]: With dead ends: 33678 [2020-10-27 18:50:11,561 INFO L226 Difference]: Without dead ends: 21316 [2020-10-27 18:50:11,600 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:50:11,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21316 states. [2020-10-27 18:50:12,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21316 to 20421. [2020-10-27 18:50:12,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20421 states. [2020-10-27 18:50:12,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20421 states to 20421 states and 28657 transitions. [2020-10-27 18:50:12,231 INFO L78 Accepts]: Start accepts. Automaton has 20421 states and 28657 transitions. Word has length 240 [2020-10-27 18:50:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:12,232 INFO L481 AbstractCegarLoop]: Abstraction has 20421 states and 28657 transitions. [2020-10-27 18:50:12,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:50:12,233 INFO L276 IsEmpty]: Start isEmpty. Operand 20421 states and 28657 transitions. [2020-10-27 18:50:12,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2020-10-27 18:50:12,239 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:12,239 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-27 18:50:12,240 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-27 18:50:12,240 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:12,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:12,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1379936595, now seen corresponding path program 1 times [2020-10-27 18:50:12,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:12,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [482954902] [2020-10-27 18:50:12,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:12,355 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:12,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:13,735 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:14,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:14,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 257 [2020-10-27 18:50:14,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-27 18:50:14,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2348 [2020-10-27 18:50:14,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 194 [2020-10-27 18:50:14,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-27 18:50:14,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:14,828 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:14,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:14,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:14,839 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:14,839 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:14,839 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:14,839 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-27 18:50:14,839 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:14,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:14,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:14,840 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:14,840 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:14,870 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:14,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:14,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:14,907 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:14,908 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:50:14,908 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:14,908 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 30 [2020-10-27 18:50:14,908 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-27 18:50:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:14,908 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-27 18:50:14,909 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:14,937 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:50:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:14,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:15,071 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:15,071 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-10-27 18:50:15,072 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:15,072 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 106 [2020-10-27 18:50:15,072 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:15,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:15,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:15,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-10-27 18:50:15,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:15,168 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 107 proven. 2 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2020-10-27 18:50:15,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [482954902] [2020-10-27 18:50:15,168 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:15,168 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-27 18:50:15,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539736025] [2020-10-27 18:50:15,169 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-27 18:50:15,169 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:15,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-27 18:50:15,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-27 18:50:15,170 INFO L87 Difference]: Start difference. First operand 20421 states and 28657 transitions. Second operand 5 states. [2020-10-27 18:50:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:50:31,990 INFO L93 Difference]: Finished difference Result 45290 states and 66930 transitions. [2020-10-27 18:50:31,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-27 18:50:31,994 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 243 [2020-10-27 18:50:31,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:50:32,116 INFO L225 Difference]: With dead ends: 45290 [2020-10-27 18:50:32,116 INFO L226 Difference]: Without dead ends: 26184 [2020-10-27 18:50:32,153 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-27 18:50:32,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26184 states. [2020-10-27 18:50:32,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26184 to 26170. [2020-10-27 18:50:32,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26170 states. [2020-10-27 18:50:32,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26170 states to 26170 states and 38473 transitions. [2020-10-27 18:50:32,879 INFO L78 Accepts]: Start accepts. Automaton has 26170 states and 38473 transitions. Word has length 243 [2020-10-27 18:50:32,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-27 18:50:32,880 INFO L481 AbstractCegarLoop]: Abstraction has 26170 states and 38473 transitions. [2020-10-27 18:50:32,880 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-27 18:50:32,880 INFO L276 IsEmpty]: Start isEmpty. Operand 26170 states and 38473 transitions. [2020-10-27 18:50:32,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2020-10-27 18:50:32,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-27 18:50:32,887 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, 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, 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 18:50:32,887 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-27 18:50:32,887 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-27 18:50:32,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-27 18:50:32,888 INFO L82 PathProgramCache]: Analyzing trace with hash 1050907124, now seen corresponding path program 1 times [2020-10-27 18:50:32,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-27 18:50:32,888 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1871063484] [2020-10-27 18:50:32,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-27 18:50:32,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:33,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:33,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:33,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 260 [2020-10-27 18:50:33,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:33,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1003 [2020-10-27 18:50:33,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-27 18:50:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 5 [2020-10-27 18:50:33,963 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 193 [2020-10-27 18:50:33,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:34,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-27 18:50:34,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:34,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:34,147 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:34,147 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-27 18:50:34,147 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:34,147 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-10-27 18:50:34,147 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:34,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-27 18:50:34,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-27 18:50:34,148 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-27 18:50:34,148 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:34,197 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 8 [2020-10-27 18:50:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:34,231 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:34,391 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:34,391 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-10-27 18:50:34,391 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:34,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 173 [2020-10-27 18:50:34,392 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:34,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-27 18:50:34,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:50:34,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 88 [2020-10-27 18:50:34,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:34,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2020-10-27 18:50:34,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-27 18:50:34,605 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-27 18:50:34,742 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-27 18:50:34,742 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-27 18:50:34,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-27 18:50:34,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-10-27 18:50:34,743 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-10-27 18:50:34,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-27 18:50:34,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 0 [2020-10-27 18:50:34,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 99 [2020-10-27 18:50:34,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-27 18:50:34,896 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 187 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-27 18:50:34,896 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1871063484] [2020-10-27 18:50:34,896 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-27 18:50:34,897 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-27 18:50:34,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573069753] [2020-10-27 18:50:34,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-27 18:50:34,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-27 18:50:34,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-27 18:50:34,898 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-27 18:50:34,898 INFO L87 Difference]: Start difference. First operand 26170 states and 38473 transitions. Second operand 10 states. [2020-10-27 18:50:35,121 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 66 [2020-10-27 18:51:05,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-27 18:51:05,668 INFO L93 Difference]: Finished difference Result 60134 states and 98243 transitions. [2020-10-27 18:51:05,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-27 18:51:05,672 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 246 [2020-10-27 18:51:05,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-27 18:51:05,903 INFO L225 Difference]: With dead ends: 60134 [2020-10-27 18:51:05,904 INFO L226 Difference]: Without dead ends: 34403 [2020-10-27 18:51:05,966 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2020-10-27 18:51:06,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34403 states.