/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=SHALLOWEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf language data_model -i ../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c -------------------------------------------------------------------------------- This is Ultimate 0.2.0-0f64333 [2020-10-26 19:06:18,770 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-26 19:06:18,774 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-26 19:06:18,817 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-26 19:06:18,817 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-26 19:06:18,819 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-26 19:06:18,820 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-26 19:06:18,823 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-26 19:06:18,834 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-26 19:06:18,838 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-26 19:06:18,839 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-26 19:06:18,843 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-26 19:06:18,843 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-26 19:06:18,844 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-26 19:06:18,847 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-26 19:06:18,849 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-26 19:06:18,850 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-26 19:06:18,855 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-26 19:06:18,857 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-26 19:06:18,866 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-26 19:06:18,867 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-26 19:06:18,870 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-26 19:06:18,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-26 19:06:18,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-26 19:06:18,882 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-26 19:06:18,882 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-26 19:06:18,882 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-26 19:06:18,885 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-26 19:06:18,885 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-26 19:06:18,886 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-26 19:06:18,886 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-26 19:06:18,887 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-26 19:06:18,888 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-26 19:06:18,889 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-26 19:06:18,890 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-26 19:06:18,891 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-26 19:06:18,894 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-26 19:06:18,894 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-26 19:06:18,895 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-26 19:06:18,896 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-26 19:06:18,897 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-26 19:06:18,898 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 [2020-10-26 19:06:18,952 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-26 19:06:18,953 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-26 19:06:18,957 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-26 19:06:18,957 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-26 19:06:18,958 INFO L138 SettingsManager]: * Use SBE=true [2020-10-26 19:06:18,958 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-26 19:06:18,958 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-26 19:06:18,959 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-26 19:06:18,959 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-26 19:06:18,959 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-26 19:06:18,960 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-26 19:06:18,960 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-26 19:06:18,960 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-26 19:06:18,961 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-26 19:06:18,961 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-26 19:06:18,961 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-26 19:06:18,961 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-26 19:06:18,961 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-26 19:06:18,962 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-26 19:06:18,962 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-26 19:06:18,962 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-26 19:06:18,962 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-26 19:06:18,963 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-26 19:06:18,963 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-26 19:06:18,963 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-26 19:06:18,963 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-26 19:06:18,963 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-26 19:06:18,964 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-26 19:06:18,964 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-26 19:06:18,964 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=SHALLOWEST;log-additional-information=true;unknown-allowed=true; [2020-10-26 19:06:19,399 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-26 19:06:19,426 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-26 19:06:19,429 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-26 19:06:19,431 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-26 19:06:19,431 INFO L275 PluginConnector]: CDTParser initialized [2020-10-26 19:06:19,432 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2020-10-26 19:06:19,510 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03280f3be/ca077f478dc544fa840a32dc107351ed/FLAG61ee59a7c [2020-10-26 19:06:20,192 INFO L306 CDTParser]: Found 1 translation units. [2020-10-26 19:06:20,193 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-crafted/zero_sum_const4.c [2020-10-26 19:06:20,203 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03280f3be/ca077f478dc544fa840a32dc107351ed/FLAG61ee59a7c [2020-10-26 19:06:20,533 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/03280f3be/ca077f478dc544fa840a32dc107351ed [2020-10-26 19:06:20,537 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-26 19:06:20,546 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-26 19:06:20,550 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-26 19:06:20,550 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-26 19:06:20,554 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-26 19:06:20,555 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,562 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1cb8dd41 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20, skipping insertion in model container [2020-10-26 19:06:20,562 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,571 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-26 19:06:20,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-26 19:06:20,789 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:06:20,800 INFO L203 MainTranslator]: Completed pre-run [2020-10-26 19:06:20,826 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-26 19:06:20,844 INFO L208 MainTranslator]: Completed translation [2020-10-26 19:06:20,844 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20 WrapperNode [2020-10-26 19:06:20,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-26 19:06:20,846 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-26 19:06:20,846 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-26 19:06:20,846 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-26 19:06:20,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,860 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,869 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,870 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,879 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,887 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,889 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (1/1) ... [2020-10-26 19:06:20,892 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-26 19:06:20,893 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-26 19:06:20,893 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-26 19:06:20,894 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-26 19:06:20,894 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (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 [2020-10-26 19:06:20,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-26 19:06:20,974 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-26 19:06:20,974 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2020-10-26 19:06:20,975 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-26 19:06:20,975 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-26 19:06:20,975 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-26 19:06:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-26 19:06:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2020-10-26 19:06:20,975 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2020-10-26 19:06:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-26 19:06:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-26 19:06:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-26 19:06:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_long [2020-10-26 19:06:20,976 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-26 19:06:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-26 19:06:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-26 19:06:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-26 19:06:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-26 19:06:20,977 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-26 19:06:20,978 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-26 19:06:20,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-26 19:06:20,978 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-26 19:06:21,780 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-26 19:06:21,780 INFO L298 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-26 19:06:21,782 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:06:21 BoogieIcfgContainer [2020-10-26 19:06:21,783 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-26 19:06:21,786 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-26 19:06:21,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-26 19:06:21,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-26 19:06:21,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 26.10 07:06:20" (1/3) ... [2020-10-26 19:06:21,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2d7ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:06:21, skipping insertion in model container [2020-10-26 19:06:21,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 26.10 07:06:20" (2/3) ... [2020-10-26 19:06:21,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7e2d7ee1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 26.10 07:06:21, skipping insertion in model container [2020-10-26 19:06:21,793 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 26.10 07:06:21" (3/3) ... [2020-10-26 19:06:21,795 INFO L111 eAbstractionObserver]: Analyzing ICFG zero_sum_const4.c [2020-10-26 19:06:21,807 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-26 19:06:21,813 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-26 19:06:21,830 INFO L253 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-26 19:06:21,868 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-26 19:06:21,869 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-26 19:06:21,869 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-26 19:06:21,869 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-26 19:06:21,869 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-26 19:06:21,869 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-26 19:06:21,869 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-26 19:06:21,870 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-26 19:06:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states. [2020-10-26 19:06:21,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-10-26 19:06:21,898 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:21,899 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:21,899 INFO L429 AbstractCegarLoop]: === Iteration 1 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:21,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:21,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1429331599, now seen corresponding path program 1 times [2020-10-26 19:06:21,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:21,916 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1759056160] [2020-10-26 19:06:21,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:22,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:22,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,205 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,253 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,333 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:22,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:23,140 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:26,134 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 39 [2020-10-26 19:06:26,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:06:26,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4082 [2020-10-26 19:06:26,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:26,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-26 19:06:26,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:26,138 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-26 19:06:26,139 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-26 19:06:26,252 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:26,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:26,259 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,266 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:26,266 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:26,266 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:26,266 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:06:26,267 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:26,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:26,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:26,267 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:26,267 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:26,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:06:26,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1759056160] [2020-10-26 19:06:26,281 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:26,281 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-26 19:06:26,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939046334] [2020-10-26 19:06:26,286 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-26 19:06:26,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:26,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-26 19:06:26,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:06:26,304 INFO L87 Difference]: Start difference. First operand 49 states. Second operand 4 states. [2020-10-26 19:06:26,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:26,644 INFO L93 Difference]: Finished difference Result 88 states and 127 transitions. [2020-10-26 19:06:26,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-26 19:06:26,646 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-10-26 19:06:26,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:26,654 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:06:26,654 INFO L226 Difference]: Without dead ends: 41 [2020-10-26 19:06:26,658 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-26 19:06:26,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-26 19:06:26,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-26 19:06:26,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-26 19:06:26,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2020-10-26 19:06:26,702 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 29 [2020-10-26 19:06:26,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:26,703 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2020-10-26 19:06:26,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-26 19:06:26,703 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2020-10-26 19:06:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-10-26 19:06:26,704 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:26,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:26,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-26 19:06:26,705 INFO L429 AbstractCegarLoop]: === Iteration 2 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:26,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:26,706 INFO L82 PathProgramCache]: Analyzing trace with hash 1683543203, now seen corresponding path program 1 times [2020-10-26 19:06:26,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:26,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119100859] [2020-10-26 19:06:26,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:26,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:26,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,770 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:26,866 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:27,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:27,534 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:29,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:31,731 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:31,731 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-26 19:06:31,731 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-10-26 19:06:31,733 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-26 19:06:31,733 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:31,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:31,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:31,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-26 19:06:31,744 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 10 [2020-10-26 19:06:31,868 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:31,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:31,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:31,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:31,886 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:31,886 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:06:31,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:31,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:31,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:31,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:31,887 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-26 19:06:31,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119100859] [2020-10-26 19:06:31,894 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-26 19:06:31,894 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-10-26 19:06:31,894 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116671356] [2020-10-26 19:06:31,897 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:06:31,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:31,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:06:31,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:31,909 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand 5 states. [2020-10-26 19:06:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:32,335 INFO L93 Difference]: Finished difference Result 84 states and 106 transitions. [2020-10-26 19:06:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-26 19:06:32,336 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 31 [2020-10-26 19:06:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:32,338 INFO L225 Difference]: With dead ends: 84 [2020-10-26 19:06:32,338 INFO L226 Difference]: Without dead ends: 57 [2020-10-26 19:06:32,341 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-10-26 19:06:32,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-26 19:06:32,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 48. [2020-10-26 19:06:32,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-26 19:06:32,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2020-10-26 19:06:32,367 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 31 [2020-10-26 19:06:32,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:32,367 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2020-10-26 19:06:32,368 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:06:32,368 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2020-10-26 19:06:32,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-26 19:06:32,369 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:32,369 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] [2020-10-26 19:06:32,370 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-26 19:06:32,370 INFO L429 AbstractCegarLoop]: === Iteration 3 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:32,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:32,370 INFO L82 PathProgramCache]: Analyzing trace with hash 551314867, now seen corresponding path program 1 times [2020-10-26 19:06:32,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:32,371 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890423110] [2020-10-26 19:06:32,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:32,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:32,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:32,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:32,454 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:32,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:32,484 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:32,497 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:32,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:35,479 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:37,396 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-26 19:06:37,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:06:37,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-26 19:06:37,399 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:37,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-26 19:06:37,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:37,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-26 19:06:37,400 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:37,525 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:37,531 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,537 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:37,537 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:37,537 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:37,537 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-26 19:06:37,538 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:37,538 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:37,538 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:37,546 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-26 19:06:37,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890423110] [2020-10-26 19:06:37,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:37,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-26 19:06:37,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474553365] [2020-10-26 19:06:37,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-26 19:06:37,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:37,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-26 19:06:37,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:37,549 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand 5 states. [2020-10-26 19:06:37,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:37,748 INFO L93 Difference]: Finished difference Result 88 states and 104 transitions. [2020-10-26 19:06:37,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-26 19:06:37,749 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 47 [2020-10-26 19:06:37,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:37,750 INFO L225 Difference]: With dead ends: 88 [2020-10-26 19:06:37,750 INFO L226 Difference]: Without dead ends: 50 [2020-10-26 19:06:37,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-26 19:06:37,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-26 19:06:37,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2020-10-26 19:06:37,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-26 19:06:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 58 transitions. [2020-10-26 19:06:37,760 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 58 transitions. Word has length 47 [2020-10-26 19:06:37,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:37,761 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 58 transitions. [2020-10-26 19:06:37,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-26 19:06:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 58 transitions. [2020-10-26 19:06:37,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-26 19:06:37,762 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:37,763 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:06:37,763 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-26 19:06:37,763 INFO L429 AbstractCegarLoop]: === Iteration 4 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:37,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:37,764 INFO L82 PathProgramCache]: Analyzing trace with hash 1638767733, now seen corresponding path program 2 times [2020-10-26 19:06:37,764 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:37,764 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1051291620] [2020-10-26 19:06:37,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:37,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:37,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,851 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:37,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:38,037 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:39,078 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:42,791 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:42,792 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-26 19:06:42,792 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:06:42,792 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:06:42,793 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-26 19:06:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:42,793 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:06:42,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-26 19:06:42,918 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:42,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:42,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:42,929 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:42,929 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:42,929 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:42,929 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:06:42,929 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:42,929 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:42,930 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:42,930 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:42,941 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2020-10-26 19:06:42,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1051291620] [2020-10-26 19:06:42,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:42,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-26 19:06:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812044293] [2020-10-26 19:06:42,943 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-26 19:06:42,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:42,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-26 19:06:42,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-26 19:06:42,945 INFO L87 Difference]: Start difference. First operand 50 states and 58 transitions. Second operand 6 states. [2020-10-26 19:06:43,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:43,379 INFO L93 Difference]: Finished difference Result 100 states and 122 transitions. [2020-10-26 19:06:43,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-26 19:06:43,380 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 49 [2020-10-26 19:06:43,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:43,381 INFO L225 Difference]: With dead ends: 100 [2020-10-26 19:06:43,381 INFO L226 Difference]: Without dead ends: 66 [2020-10-26 19:06:43,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2020-10-26 19:06:43,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-26 19:06:43,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2020-10-26 19:06:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-26 19:06:43,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 74 transitions. [2020-10-26 19:06:43,392 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 74 transitions. Word has length 49 [2020-10-26 19:06:43,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:43,392 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 74 transitions. [2020-10-26 19:06:43,392 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-26 19:06:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 74 transitions. [2020-10-26 19:06:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2020-10-26 19:06:43,394 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:43,394 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-26 19:06:43,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-26 19:06:43,395 INFO L429 AbstractCegarLoop]: === Iteration 5 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:43,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:43,395 INFO L82 PathProgramCache]: Analyzing trace with hash 998541701, now seen corresponding path program 3 times [2020-10-26 19:06:43,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:43,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1380392418] [2020-10-26 19:06:43,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:43,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:43,571 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:44,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:44,717 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:46,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:47,171 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:47,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:48,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:48,617 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:48,619 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-26 19:06:48,619 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:06:48,619 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5111 [2020-10-26 19:06:48,620 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:48,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-26 19:06:48,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:06:48,620 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-26 19:06:48,620 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:49,614 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2020-10-26 19:06:49,885 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 17 [2020-10-26 19:06:50,328 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 32 [2020-10-26 19:06:50,516 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 31 [2020-10-26 19:06:50,810 WARN L193 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2020-10-26 19:06:50,987 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2020-10-26 19:06:51,163 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 25 [2020-10-26 19:06:51,341 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2020-10-26 19:06:51,952 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 17 [2020-10-26 19:06:52,568 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 30 [2020-10-26 19:06:53,590 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:06:53,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:53,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:53,605 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:06:53,605 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:06:53,606 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:06:53,606 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-26 19:06:53,606 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:06:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:06:53,606 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:06:53,607 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:06:53,607 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:06:53,647 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:06:53,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1380392418] [2020-10-26 19:06:53,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:06:53,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-26 19:06:53,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964009010] [2020-10-26 19:06:53,649 INFO L461 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-26 19:06:53,650 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:06:53,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-26 19:06:53,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=1249, Unknown=0, NotChecked=0, Total=1406 [2020-10-26 19:06:53,652 INFO L87 Difference]: Start difference. First operand 66 states and 74 transitions. Second operand 38 states. [2020-10-26 19:06:54,175 WARN L193 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 50 [2020-10-26 19:06:55,006 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 40 [2020-10-26 19:06:55,334 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 34 [2020-10-26 19:06:55,713 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 54 [2020-10-26 19:06:55,928 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 35 [2020-10-26 19:06:56,714 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 31 [2020-10-26 19:06:56,930 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2020-10-26 19:06:57,491 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 30 [2020-10-26 19:06:59,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:06:59,558 INFO L93 Difference]: Finished difference Result 149 states and 171 transitions. [2020-10-26 19:06:59,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-26 19:06:59,560 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 65 [2020-10-26 19:06:59,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:06:59,563 INFO L225 Difference]: With dead ends: 149 [2020-10-26 19:06:59,563 INFO L226 Difference]: Without dead ends: 143 [2020-10-26 19:06:59,565 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 6 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 908 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=376, Invalid=3046, Unknown=0, NotChecked=0, Total=3422 [2020-10-26 19:06:59,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-26 19:06:59,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 127. [2020-10-26 19:06:59,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-26 19:06:59,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 147 transitions. [2020-10-26 19:06:59,587 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 147 transitions. Word has length 65 [2020-10-26 19:06:59,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:06:59,588 INFO L481 AbstractCegarLoop]: Abstraction has 127 states and 147 transitions. [2020-10-26 19:06:59,588 INFO L482 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-26 19:06:59,588 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 147 transitions. [2020-10-26 19:06:59,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-26 19:06:59,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:06:59,590 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 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] [2020-10-26 19:06:59,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-26 19:06:59,590 INFO L429 AbstractCegarLoop]: === Iteration 6 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:06:59,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:06:59,591 INFO L82 PathProgramCache]: Analyzing trace with hash 817790087, now seen corresponding path program 4 times [2020-10-26 19:06:59,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:06:59,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [871912577] [2020-10-26 19:06:59,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:06:59,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:06:59,640 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,762 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:06:59,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:00,216 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:04,629 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:04,629 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-26 19:07:04,629 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:07:04,629 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:07:04,630 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:07:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:04,630 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-26 19:07:04,630 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:04,800 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:04,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:04,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:04,808 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:04,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:04,809 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:04,809 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-26 19:07:04,809 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:04,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:04,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:04,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:04,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2020-10-26 19:07:04,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [871912577] [2020-10-26 19:07:04,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:04,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:07:04,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511048380] [2020-10-26 19:07:04,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:07:04,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:04,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:07:04,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:07:04,821 INFO L87 Difference]: Start difference. First operand 127 states and 147 transitions. Second operand 10 states. [2020-10-26 19:07:05,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:05,699 INFO L93 Difference]: Finished difference Result 280 states and 325 transitions. [2020-10-26 19:07:05,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-26 19:07:05,700 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-26 19:07:05,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:05,702 INFO L225 Difference]: With dead ends: 280 [2020-10-26 19:07:05,702 INFO L226 Difference]: Without dead ends: 135 [2020-10-26 19:07:05,704 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:07:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-26 19:07:05,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 118. [2020-10-26 19:07:05,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-26 19:07:05,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 132 transitions. [2020-10-26 19:07:05,729 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 132 transitions. Word has length 67 [2020-10-26 19:07:05,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:05,729 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 132 transitions. [2020-10-26 19:07:05,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:07:05,730 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 132 transitions. [2020-10-26 19:07:05,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-26 19:07:05,735 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:05,737 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2020-10-26 19:07:05,737 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-26 19:07:05,737 INFO L429 AbstractCegarLoop]: === Iteration 7 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:05,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:05,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1555963337, now seen corresponding path program 5 times [2020-10-26 19:07:05,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:05,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1978990312] [2020-10-26 19:07:05,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:05,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:05,776 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,802 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,827 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:05,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:06,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:06,645 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:08,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:10,766 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:10,767 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-10-26 19:07:10,767 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-26 19:07:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:07:10,768 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-26 19:07:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:10,768 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-26 19:07:10,768 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:10,921 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:10,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:10,926 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:10,933 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:10,934 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:10,934 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:10,934 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-10-26 19:07:10,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:10,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:10,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:10,951 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2020-10-26 19:07:10,952 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1978990312] [2020-10-26 19:07:10,952 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:10,952 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-26 19:07:10,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785167541] [2020-10-26 19:07:10,953 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-26 19:07:10,953 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:10,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-26 19:07:10,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-26 19:07:10,954 INFO L87 Difference]: Start difference. First operand 118 states and 132 transitions. Second operand 10 states. [2020-10-26 19:07:11,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:11,833 INFO L93 Difference]: Finished difference Result 126 states and 140 transitions. [2020-10-26 19:07:11,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-26 19:07:11,834 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-10-26 19:07:11,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:11,835 INFO L225 Difference]: With dead ends: 126 [2020-10-26 19:07:11,836 INFO L226 Difference]: Without dead ends: 84 [2020-10-26 19:07:11,837 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:07:11,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-26 19:07:11,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2020-10-26 19:07:11,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-26 19:07:11,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 92 transitions. [2020-10-26 19:07:11,849 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 92 transitions. Word has length 69 [2020-10-26 19:07:11,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:11,850 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 92 transitions. [2020-10-26 19:07:11,850 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-26 19:07:11,850 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 92 transitions. [2020-10-26 19:07:11,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-26 19:07:11,851 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:11,852 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:11,852 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-26 19:07:11,852 INFO L429 AbstractCegarLoop]: === Iteration 8 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:11,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:11,853 INFO L82 PathProgramCache]: Analyzing trace with hash 854432983, now seen corresponding path program 6 times [2020-10-26 19:07:11,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:11,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1181402170] [2020-10-26 19:07:11,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:11,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:12,906 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:13,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:15,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:16,922 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:16,923 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-26 19:07:16,923 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-26 19:07:16,923 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:07:16,923 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:16,923 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 58 [2020-10-26 19:07:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:16,924 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-10-26 19:07:16,924 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:18,555 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 36 [2020-10-26 19:07:18,710 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 30 [2020-10-26 19:07:19,055 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-10-26 19:07:19,238 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 31 [2020-10-26 19:07:19,595 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 20 [2020-10-26 19:07:19,810 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 26 [2020-10-26 19:07:20,038 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2020-10-26 19:07:20,256 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 27 [2020-10-26 19:07:20,518 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 41 [2020-10-26 19:07:20,736 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 27 [2020-10-26 19:07:20,966 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2020-10-26 19:07:21,204 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-26 19:07:21,457 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 30 [2020-10-26 19:07:21,699 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 26 [2020-10-26 19:07:21,930 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2020-10-26 19:07:22,417 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 33 [2020-10-26 19:07:22,668 WARN L193 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 29 [2020-10-26 19:07:22,916 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-10-26 19:07:23,273 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 29 [2020-10-26 19:07:23,547 WARN L193 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 33 [2020-10-26 19:07:24,007 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 22 [2020-10-26 19:07:24,340 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 16 [2020-10-26 19:07:24,625 WARN L193 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 23 [2020-10-26 19:07:24,904 WARN L193 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 22 [2020-10-26 19:07:25,196 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 27 [2020-10-26 19:07:25,440 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2020-10-26 19:07:26,931 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:26,937 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:26,939 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:26,939 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:26,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:26,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:07:26,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:26,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:26,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:26,940 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:26,940 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:27,013 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 1 proven. 80 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:07:27,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1181402170] [2020-10-26 19:07:27,014 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:27,014 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53] total 53 [2020-10-26 19:07:27,014 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606089414] [2020-10-26 19:07:27,015 INFO L461 AbstractCegarLoop]: Interpolant automaton has 53 states [2020-10-26 19:07:27,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:27,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2020-10-26 19:07:27,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2020-10-26 19:07:27,017 INFO L87 Difference]: Start difference. First operand 84 states and 92 transitions. Second operand 53 states. [2020-10-26 19:07:27,671 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 39 [2020-10-26 19:07:28,151 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 34 [2020-10-26 19:07:28,932 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 49 [2020-10-26 19:07:29,270 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 47 [2020-10-26 19:07:29,572 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 47 [2020-10-26 19:07:29,936 WARN L193 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 46 [2020-10-26 19:07:30,237 WARN L193 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 40 [2020-10-26 19:07:30,642 WARN L193 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 37 [2020-10-26 19:07:31,124 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 37 [2020-10-26 19:07:31,834 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 19:07:32,130 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 42 [2020-10-26 19:07:32,455 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 47 [2020-10-26 19:07:32,964 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 42 [2020-10-26 19:07:36,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:36,478 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2020-10-26 19:07:36,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-26 19:07:36,479 INFO L78 Accepts]: Start accepts. Automaton has 53 states. Word has length 83 [2020-10-26 19:07:36,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:36,481 INFO L225 Difference]: With dead ends: 173 [2020-10-26 19:07:36,481 INFO L226 Difference]: Without dead ends: 167 [2020-10-26 19:07:36,485 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 7 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=479, Invalid=5221, Unknown=0, NotChecked=0, Total=5700 [2020-10-26 19:07:36,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-26 19:07:36,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 145. [2020-10-26 19:07:36,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-26 19:07:36,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 161 transitions. [2020-10-26 19:07:36,512 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 161 transitions. Word has length 83 [2020-10-26 19:07:36,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:36,512 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 161 transitions. [2020-10-26 19:07:36,512 INFO L482 AbstractCegarLoop]: Interpolant automaton has 53 states. [2020-10-26 19:07:36,512 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 161 transitions. [2020-10-26 19:07:36,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:07:36,514 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:36,514 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:36,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-26 19:07:36,515 INFO L429 AbstractCegarLoop]: === Iteration 9 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2119785625, now seen corresponding path program 7 times [2020-10-26 19:07:36,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:36,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2018819310] [2020-10-26 19:07:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:36,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:36,546 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:36,572 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:36,653 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:36,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:36,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:36,824 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,536 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:41,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:07:41,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:07:41,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-26 19:07:41,537 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:07:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:41,537 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 72 [2020-10-26 19:07:41,537 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:41,733 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:41,736 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:41,739 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:41,739 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:41,740 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:41,740 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:07:41,740 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:41,740 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:41,741 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:07:41,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2018819310] [2020-10-26 19:07:41,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:41,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:07:41,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2922354] [2020-10-26 19:07:41,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:07:41,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:41,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:07:41,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:07:41,757 INFO L87 Difference]: Start difference. First operand 145 states and 161 transitions. Second operand 12 states. [2020-10-26 19:07:42,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:42,953 INFO L93 Difference]: Finished difference Result 346 states and 389 transitions. [2020-10-26 19:07:42,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:07:42,955 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-26 19:07:42,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:42,957 INFO L225 Difference]: With dead ends: 346 [2020-10-26 19:07:42,957 INFO L226 Difference]: Without dead ends: 173 [2020-10-26 19:07:42,959 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:07:42,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-26 19:07:42,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 156. [2020-10-26 19:07:42,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-26 19:07:42,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 171 transitions. [2020-10-26 19:07:42,976 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 171 transitions. Word has length 85 [2020-10-26 19:07:42,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:42,977 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 171 transitions. [2020-10-26 19:07:42,977 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:07:42,977 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 171 transitions. [2020-10-26 19:07:42,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-26 19:07:42,978 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:42,979 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:42,979 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-26 19:07:42,979 INFO L429 AbstractCegarLoop]: === Iteration 10 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:42,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:42,980 INFO L82 PathProgramCache]: Analyzing trace with hash 1795824281, now seen corresponding path program 8 times [2020-10-26 19:07:42,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:42,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649546223] [2020-10-26 19:07:42,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:43,012 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,096 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,157 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:43,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:47,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:47,999 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-26 19:07:47,999 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-26 19:07:47,999 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:07:47,999 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-26 19:07:47,999 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:48,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-26 19:07:48,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:48,215 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:07:48,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:48,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:48,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:48,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:07:48,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:07:48,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-26 19:07:48,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:48,223 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:07:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:07:48,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:07:48,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:48,231 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 21 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2020-10-26 19:07:48,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649546223] [2020-10-26 19:07:48,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:07:48,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-26 19:07:48,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785609844] [2020-10-26 19:07:48,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-26 19:07:48,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:07:48,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-26 19:07:48,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-26 19:07:48,233 INFO L87 Difference]: Start difference. First operand 156 states and 171 transitions. Second operand 12 states. [2020-10-26 19:07:49,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:07:49,482 INFO L93 Difference]: Finished difference Result 164 states and 179 transitions. [2020-10-26 19:07:49,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-26 19:07:49,483 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-26 19:07:49,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:07:49,485 INFO L225 Difference]: With dead ends: 164 [2020-10-26 19:07:49,485 INFO L226 Difference]: Without dead ends: 102 [2020-10-26 19:07:49,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-26 19:07:49,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-26 19:07:49,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2020-10-26 19:07:49,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-26 19:07:49,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 110 transitions. [2020-10-26 19:07:49,496 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 110 transitions. Word has length 85 [2020-10-26 19:07:49,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:07:49,497 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 110 transitions. [2020-10-26 19:07:49,497 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-26 19:07:49,497 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 110 transitions. [2020-10-26 19:07:49,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2020-10-26 19:07:49,498 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:07:49,498 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:07:49,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-26 19:07:49,499 INFO L429 AbstractCegarLoop]: === Iteration 11 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:07:49,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:07:49,499 INFO L82 PathProgramCache]: Analyzing trace with hash -1021657175, now seen corresponding path program 9 times [2020-10-26 19:07:49,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:07:49,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2138422535] [2020-10-26 19:07:49,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:07:49,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:07:49,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:50,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:53,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:07:55,317 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:07:55,317 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 111 [2020-10-26 19:07:55,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-26 19:07:55,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5754 [2020-10-26 19:07:55,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:07:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 76 [2020-10-26 19:07:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:07:55,318 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 95 [2020-10-26 19:07:55,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:07:57,498 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2020-10-26 19:07:57,918 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 43 [2020-10-26 19:07:58,158 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2020-10-26 19:07:58,378 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2020-10-26 19:07:58,611 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-26 19:07:58,804 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 37 [2020-10-26 19:07:59,005 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 40 [2020-10-26 19:07:59,220 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 39 [2020-10-26 19:07:59,450 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-26 19:07:59,663 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2020-10-26 19:07:59,892 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-26 19:08:00,124 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2020-10-26 19:08:00,330 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2020-10-26 19:08:00,536 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 34 [2020-10-26 19:08:00,828 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2020-10-26 19:08:01,056 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2020-10-26 19:08:01,368 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 33 [2020-10-26 19:08:01,617 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 34 [2020-10-26 19:08:01,860 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-26 19:08:02,110 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2020-10-26 19:08:02,363 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-26 19:08:02,631 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2020-10-26 19:08:02,905 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2020-10-26 19:08:03,214 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-26 19:08:03,554 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-26 19:08:03,799 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2020-10-26 19:08:04,057 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-10-26 19:08:04,321 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-26 19:08:04,582 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 29 [2020-10-26 19:08:04,833 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 25 [2020-10-26 19:08:05,498 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 31 [2020-10-26 19:08:05,756 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2020-10-26 19:08:06,015 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2020-10-26 19:08:06,296 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2020-10-26 19:08:06,545 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 32 [2020-10-26 19:08:06,782 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2020-10-26 19:08:09,418 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:09,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:09,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:09,428 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:09,428 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:09,429 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:09,429 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:09,429 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:09,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:09,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:09,518 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:08:09,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2138422535] [2020-10-26 19:08:09,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:09,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75] total 75 [2020-10-26 19:08:09,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640720788] [2020-10-26 19:08:09,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 75 states [2020-10-26 19:08:09,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:09,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2020-10-26 19:08:09,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=4915, Unknown=0, NotChecked=0, Total=5550 [2020-10-26 19:08:09,522 INFO L87 Difference]: Start difference. First operand 102 states and 110 transitions. Second operand 75 states. [2020-10-26 19:08:10,890 WARN L193 SmtUtils]: Spent 832.00 ms on a formula simplification. DAG size of input: 178 DAG size of output: 98 [2020-10-26 19:08:11,760 WARN L193 SmtUtils]: Spent 415.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 90 [2020-10-26 19:08:13,329 WARN L193 SmtUtils]: Spent 692.00 ms on a formula simplification. DAG size of input: 169 DAG size of output: 96 [2020-10-26 19:08:14,150 WARN L193 SmtUtils]: Spent 551.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 89 [2020-10-26 19:08:15,237 WARN L193 SmtUtils]: Spent 633.00 ms on a formula simplification. DAG size of input: 173 DAG size of output: 87 [2020-10-26 19:08:16,270 WARN L193 SmtUtils]: Spent 716.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 105 [2020-10-26 19:08:16,595 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 33 [2020-10-26 19:08:17,305 WARN L193 SmtUtils]: Spent 426.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 92 [2020-10-26 19:08:18,369 WARN L193 SmtUtils]: Spent 668.00 ms on a formula simplification. DAG size of input: 197 DAG size of output: 94 [2020-10-26 19:08:18,760 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 52 [2020-10-26 19:08:19,480 WARN L193 SmtUtils]: Spent 508.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 93 [2020-10-26 19:08:19,871 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 51 [2020-10-26 19:08:20,248 WARN L193 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 49 [2020-10-26 19:08:20,807 WARN L193 SmtUtils]: Spent 365.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 75 [2020-10-26 19:08:21,849 WARN L193 SmtUtils]: Spent 652.00 ms on a formula simplification. DAG size of input: 177 DAG size of output: 95 [2020-10-26 19:08:22,455 WARN L193 SmtUtils]: Spent 388.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 79 [2020-10-26 19:08:22,960 WARN L193 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 62 [2020-10-26 19:08:23,836 WARN L193 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 174 DAG size of output: 35 [2020-10-26 19:08:24,584 WARN L193 SmtUtils]: Spent 538.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 90 [2020-10-26 19:08:25,476 WARN L193 SmtUtils]: Spent 583.00 ms on a formula simplification. DAG size of input: 158 DAG size of output: 87 [2020-10-26 19:08:26,423 WARN L193 SmtUtils]: Spent 592.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 89 [2020-10-26 19:08:27,318 WARN L193 SmtUtils]: Spent 534.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 88 [2020-10-26 19:08:28,229 WARN L193 SmtUtils]: Spent 579.00 ms on a formula simplification. DAG size of input: 192 DAG size of output: 82 [2020-10-26 19:08:29,006 WARN L193 SmtUtils]: Spent 487.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 80 [2020-10-26 19:08:30,031 WARN L193 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 78 [2020-10-26 19:08:30,817 WARN L193 SmtUtils]: Spent 406.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 70 [2020-10-26 19:08:31,426 WARN L193 SmtUtils]: Spent 317.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 71 [2020-10-26 19:08:31,917 WARN L193 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 54 [2020-10-26 19:08:41,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:41,324 INFO L93 Difference]: Finished difference Result 343 states and 391 transitions. [2020-10-26 19:08:41,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2020-10-26 19:08:41,326 INFO L78 Accepts]: Start accepts. Automaton has 75 states. Word has length 101 [2020-10-26 19:08:41,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:41,329 INFO L225 Difference]: With dead ends: 343 [2020-10-26 19:08:41,329 INFO L226 Difference]: Without dead ends: 335 [2020-10-26 19:08:41,333 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3334 ImplicationChecksByTransitivity, 32.5s TimeCoverageRelationStatistics Valid=1450, Invalid=10540, Unknown=0, NotChecked=0, Total=11990 [2020-10-26 19:08:41,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2020-10-26 19:08:41,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 288. [2020-10-26 19:08:41,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 288 states. [2020-10-26 19:08:41,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 332 transitions. [2020-10-26 19:08:41,367 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 332 transitions. Word has length 101 [2020-10-26 19:08:41,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:41,369 INFO L481 AbstractCegarLoop]: Abstraction has 288 states and 332 transitions. [2020-10-26 19:08:41,369 INFO L482 AbstractCegarLoop]: Interpolant automaton has 75 states. [2020-10-26 19:08:41,369 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 332 transitions. [2020-10-26 19:08:41,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-26 19:08:41,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:41,380 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:41,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-26 19:08:41,380 INFO L429 AbstractCegarLoop]: === Iteration 12 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:41,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:41,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1606525549, now seen corresponding path program 10 times [2020-10-26 19:08:41,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:41,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [953842095] [2020-10-26 19:08:41,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:41,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:41,422 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:41,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:41,493 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:41,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:41,552 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:46,416 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:46,416 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-26 19:08:46,417 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:08:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-26 19:08:46,417 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-26 19:08:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:46,417 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-26 19:08:46,417 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:46,755 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:46,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:46,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:46,760 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:46,761 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:46,761 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:46,761 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-26 19:08:46,761 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:46,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:46,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:46,762 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:46,762 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:46,775 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2020-10-26 19:08:46,775 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [953842095] [2020-10-26 19:08:46,776 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:46,776 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-26 19:08:46,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687265385] [2020-10-26 19:08:46,777 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-26 19:08:46,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:46,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-26 19:08:46,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-26 19:08:46,778 INFO L87 Difference]: Start difference. First operand 288 states and 332 transitions. Second operand 14 states. [2020-10-26 19:08:49,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:49,122 INFO L93 Difference]: Finished difference Result 536 states and 619 transitions. [2020-10-26 19:08:49,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-26 19:08:49,124 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-10-26 19:08:49,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:49,127 INFO L225 Difference]: With dead ends: 536 [2020-10-26 19:08:49,127 INFO L226 Difference]: Without dead ends: 318 [2020-10-26 19:08:49,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-26 19:08:49,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2020-10-26 19:08:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 299. [2020-10-26 19:08:49,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-26 19:08:49,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 336 transitions. [2020-10-26 19:08:49,161 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 336 transitions. Word has length 105 [2020-10-26 19:08:49,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:49,161 INFO L481 AbstractCegarLoop]: Abstraction has 299 states and 336 transitions. [2020-10-26 19:08:49,161 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-26 19:08:49,161 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 336 transitions. [2020-10-26 19:08:49,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2020-10-26 19:08:49,163 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:49,163 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:49,163 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-26 19:08:49,163 INFO L429 AbstractCegarLoop]: === Iteration 13 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:49,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:49,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1071503793, now seen corresponding path program 11 times [2020-10-26 19:08:49,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:49,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438667727] [2020-10-26 19:08:49,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:49,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:49,241 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:49,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:49,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:49,391 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:49,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:50,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:54,191 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:54,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-26 19:08:54,192 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-26 19:08:54,192 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-26 19:08:54,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-26 19:08:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:08:54,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 96 [2020-10-26 19:08:54,193 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:54,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:08:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:54,598 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:54,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:08:54,601 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:08:54,601 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:08:54,601 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:08:54,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:08:54,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:08:54,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:08:54,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:08:54,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:08:54,617 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 64 proven. 16 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2020-10-26 19:08:54,618 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438667727] [2020-10-26 19:08:54,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:08:54,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-26 19:08:54,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564477165] [2020-10-26 19:08:54,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-26 19:08:54,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:08:54,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-26 19:08:54,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-26 19:08:54,620 INFO L87 Difference]: Start difference. First operand 299 states and 336 transitions. Second operand 17 states. [2020-10-26 19:08:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:08:56,226 INFO L93 Difference]: Finished difference Result 410 states and 454 transitions. [2020-10-26 19:08:56,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-26 19:08:56,228 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 109 [2020-10-26 19:08:56,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:08:56,229 INFO L225 Difference]: With dead ends: 410 [2020-10-26 19:08:56,229 INFO L226 Difference]: Without dead ends: 129 [2020-10-26 19:08:56,231 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-26 19:08:56,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-26 19:08:56,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 120. [2020-10-26 19:08:56,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-26 19:08:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2020-10-26 19:08:56,242 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 109 [2020-10-26 19:08:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:08:56,242 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2020-10-26 19:08:56,242 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-26 19:08:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2020-10-26 19:08:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2020-10-26 19:08:56,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:08:56,243 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:08:56,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-26 19:08:56,243 INFO L429 AbstractCegarLoop]: === Iteration 14 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:08:56,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:08:56,244 INFO L82 PathProgramCache]: Analyzing trace with hash 629608955, now seen corresponding path program 12 times [2020-10-26 19:08:56,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:08:56,244 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [13100758] [2020-10-26 19:08:56,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:08:56,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:08:56,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:08:58,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:01,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:01,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-26 19:09:01,327 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-26 19:09:01,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-26 19:09:01,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 91 [2020-10-26 19:09:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:01,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 113 [2020-10-26 19:09:01,327 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:03,878 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2020-10-26 19:09:04,084 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 29 [2020-10-26 19:09:06,287 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-26 19:09:06,541 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2020-10-26 19:09:07,241 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 41 [2020-10-26 19:09:07,531 WARN L193 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 39 [2020-10-26 19:09:07,821 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2020-10-26 19:09:08,123 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 41 [2020-10-26 19:09:08,388 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 36 [2020-10-26 19:09:08,650 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2020-10-26 19:09:08,936 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2020-10-26 19:09:09,201 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2020-10-26 19:09:09,459 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2020-10-26 19:09:10,021 WARN L193 SmtUtils]: Spent 154.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-26 19:09:10,347 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2020-10-26 19:09:10,658 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 37 [2020-10-26 19:09:10,973 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 39 [2020-10-26 19:09:11,272 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 44 [2020-10-26 19:09:11,568 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2020-10-26 19:09:11,836 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-26 19:09:12,118 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 40 [2020-10-26 19:09:12,372 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 35 [2020-10-26 19:09:13,431 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 35 [2020-10-26 19:09:13,748 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 33 [2020-10-26 19:09:14,021 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 36 [2020-10-26 19:09:15,599 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 37 [2020-10-26 19:09:15,894 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-26 19:09:20,622 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:09:20,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:20,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:20,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:20,633 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:09:20,633 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:09:20,633 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:09:20,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:09:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:09:20,634 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:09:20,634 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:09:20,754 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 2 proven. 223 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-26 19:09:20,754 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [13100758] [2020-10-26 19:09:20,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:09:20,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88] total 88 [2020-10-26 19:09:20,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695227636] [2020-10-26 19:09:20,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 88 states [2020-10-26 19:09:20,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:09:20,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2020-10-26 19:09:20,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=404, Invalid=7252, Unknown=0, NotChecked=0, Total=7656 [2020-10-26 19:09:20,757 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand 88 states. [2020-10-26 19:09:21,978 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 46 [2020-10-26 19:09:22,718 WARN L193 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 33 [2020-10-26 19:09:24,781 WARN L193 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 61 [2020-10-26 19:09:25,414 WARN L193 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 45 [2020-10-26 19:09:26,099 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 36 [2020-10-26 19:09:26,631 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 35 [2020-10-26 19:09:27,317 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 41 [2020-10-26 19:09:31,663 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 56 [2020-10-26 19:09:32,564 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 46 [2020-10-26 19:09:32,973 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2020-10-26 19:09:33,938 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 41 [2020-10-26 19:09:35,064 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 24 [2020-10-26 19:09:35,661 WARN L193 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 27 [2020-10-26 19:09:36,223 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 29 [2020-10-26 19:09:36,697 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 26 [2020-10-26 19:09:37,183 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 30 [2020-10-26 19:09:37,670 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 32 [2020-10-26 19:09:54,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-26 19:09:54,912 INFO L93 Difference]: Finished difference Result 387 states and 423 transitions. [2020-10-26 19:09:54,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2020-10-26 19:09:54,914 INFO L78 Accepts]: Start accepts. Automaton has 88 states. Word has length 119 [2020-10-26 19:09:54,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-26 19:09:54,916 INFO L225 Difference]: With dead ends: 387 [2020-10-26 19:09:54,916 INFO L226 Difference]: Without dead ends: 209 [2020-10-26 19:09:54,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 3 SyntacticMatches, 5 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3768 ImplicationChecksByTransitivity, 28.5s TimeCoverageRelationStatistics Valid=899, Invalid=13621, Unknown=0, NotChecked=0, Total=14520 [2020-10-26 19:09:54,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-26 19:09:54,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 199. [2020-10-26 19:09:54,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 199 states. [2020-10-26 19:09:54,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 214 transitions. [2020-10-26 19:09:54,939 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 214 transitions. Word has length 119 [2020-10-26 19:09:54,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-26 19:09:54,939 INFO L481 AbstractCegarLoop]: Abstraction has 199 states and 214 transitions. [2020-10-26 19:09:54,939 INFO L482 AbstractCegarLoop]: Interpolant automaton has 88 states. [2020-10-26 19:09:54,939 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 214 transitions. [2020-10-26 19:09:54,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-26 19:09:54,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-26 19:09:54,941 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-26 19:09:54,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-26 19:09:54,941 INFO L429 AbstractCegarLoop]: === Iteration 15 === [reach_errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-26 19:09:54,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-26 19:09:54,942 INFO L82 PathProgramCache]: Analyzing trace with hash -849171521, now seen corresponding path program 13 times [2020-10-26 19:09:54,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-26 19:09:54,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [753444898] [2020-10-26 19:09:54,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-26 19:09:54,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:09:54,981 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:55,010 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:55,036 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:55,060 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:55,080 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:09:59,969 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:09:59,970 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-26 19:09:59,970 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-26 19:09:59,970 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-10-26 19:09:59,970 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:09:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-26 19:09:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-26 19:09:59,970 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-26 19:09:59,970 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:00,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-26 19:10:00,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-26 19:10:00,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-26 19:10:00,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-26 19:10:00,366 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-26 19:10:00,366 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-26 19:10:00,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-26 19:10:00,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: SHALLOWEST [2020-10-26 19:10:00,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-26 19:10:00,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-26 19:10:00,367 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-26 19:10:00,367 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-26 19:10:00,377 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 25 proven. 36 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2020-10-26 19:10:00,377 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [753444898] [2020-10-26 19:10:00,377 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-26 19:10:00,377 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-26 19:10:00,377 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037327061] [2020-10-26 19:10:00,378 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-26 19:10:00,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-26 19:10:00,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-26 19:10:00,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2020-10-26 19:10:00,378 INFO L87 Difference]: Start difference. First operand 199 states and 214 transitions. Second operand 16 states.