/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.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 SingleStatement --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=NARROWEST --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 02:17:54,808 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 02:17:54,813 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 02:17:54,846 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 02:17:54,847 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 02:17:54,848 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 02:17:54,850 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 02:17:54,852 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 02:17:54,854 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 02:17:54,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 02:17:54,856 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 02:17:54,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 02:17:54,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 02:17:54,859 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 02:17:54,861 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 02:17:54,862 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 02:17:54,863 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 02:17:54,864 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 02:17:54,866 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 02:17:54,868 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 02:17:54,870 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 02:17:54,871 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 02:17:54,873 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 02:17:54,874 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 02:17:54,876 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 02:17:54,877 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 02:17:54,877 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 02:17:54,878 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 02:17:54,879 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 02:17:54,880 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 02:17:54,880 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 02:17:54,881 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 02:17:54,882 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 02:17:54,883 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 02:17:54,885 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 02:17:54,885 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 02:17:54,886 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 02:17:54,886 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 02:17:54,886 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 02:17:54,888 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 02:17:54,889 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 02:17:54,890 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 [2020-09-25 02:17:54,917 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 02:17:54,917 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 02:17:54,918 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 02:17:54,919 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 02:17:54,919 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 02:17:54,919 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 02:17:54,919 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 02:17:54,919 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 02:17:54,920 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 02:17:54,920 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 02:17:54,920 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 02:17:54,920 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 02:17:54,920 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 02:17:54,921 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 02:17:54,921 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 02:17:54,921 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 02:17:54,921 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 02:17:54,921 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 02:17:54,922 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 02:17:54,922 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 02:17:54,922 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 02:17:54,922 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 02:17:54,922 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 02:17:54,923 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 02:17:54,923 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 02:17:54,923 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 02:17:54,923 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 02:17:54,924 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 02:17:54,924 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 02:17:54,924 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode 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 -> SingleStatement 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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=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=NARROWEST;log-additional-information=true; [2020-09-25 02:17:55,626 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 02:17:55,654 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 02:17:55,659 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 02:17:55,662 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 02:17:55,663 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 02:17:55,664 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-25 02:17:55,760 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc16ac2a9/e142a0720c0c41d8843d2a38f4eb8c3b/FLAG6accb7d5d [2020-09-25 02:17:56,392 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 02:17:56,393 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-industry-pattern/array_of_struct_ptr_flag_init.i [2020-09-25 02:17:56,401 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc16ac2a9/e142a0720c0c41d8843d2a38f4eb8c3b/FLAG6accb7d5d [2020-09-25 02:17:56,685 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/dc16ac2a9/e142a0720c0c41d8843d2a38f4eb8c3b [2020-09-25 02:17:56,699 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 02:17:56,705 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 02:17:56,707 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 02:17:56,707 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 02:17:56,711 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 02:17:56,712 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:17:56" (1/1) ... [2020-09-25 02:17:56,717 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@632a6d5a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:56, skipping insertion in model container [2020-09-25 02:17:56,717 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 02:17:56" (1/1) ... [2020-09-25 02:17:56,726 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 02:17:56,756 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 02:17:56,979 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:17:56,987 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 02:17:57,007 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 02:17:57,025 INFO L208 MainTranslator]: Completed translation [2020-09-25 02:17:57,025 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57 WrapperNode [2020-09-25 02:17:57,026 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 02:17:57,027 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 02:17:57,027 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 02:17:57,027 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 02:17:57,116 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (1/1) ... [2020-09-25 02:17:57,116 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (1/1) ... [2020-09-25 02:17:57,128 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (1/1) ... [2020-09-25 02:17:57,128 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (1/1) ... [2020-09-25 02:17:57,136 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (1/1) ... [2020-09-25 02:17:57,143 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (1/1) ... [2020-09-25 02:17:57,144 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (1/1) ... [2020-09-25 02:17:57,147 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 02:17:57,147 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 02:17:57,148 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 02:17:57,148 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 02:17:57,149 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (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 [2020-09-25 02:17:57,227 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 02:17:57,228 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 02:17:57,229 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 02:17:57,229 INFO L138 BoogieDeclarations]: Found implementation of procedure init [2020-09-25 02:17:57,230 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 02:17:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-09-25 02:17:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 02:17:57,230 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 02:17:57,231 INFO L130 BoogieDeclarations]: Found specification of procedure init [2020-09-25 02:17:57,231 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-09-25 02:17:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2020-09-25 02:17:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 02:17:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-25 02:17:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2020-09-25 02:17:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-25 02:17:57,232 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 02:17:57,233 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 02:17:57,589 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 02:17:57,589 INFO L295 CfgBuilder]: Removed 3 assume(true) statements. [2020-09-25 02:17:57,594 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:17:57 BoogieIcfgContainer [2020-09-25 02:17:57,595 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 02:17:57,596 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 02:17:57,596 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 02:17:57,600 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 02:17:57,600 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 02:17:56" (1/3) ... [2020-09-25 02:17:57,601 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1566dce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:17:57, skipping insertion in model container [2020-09-25 02:17:57,601 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 02:17:57" (2/3) ... [2020-09-25 02:17:57,602 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1566dce1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 02:17:57, skipping insertion in model container [2020-09-25 02:17:57,602 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 02:17:57" (3/3) ... [2020-09-25 02:17:57,604 INFO L109 eAbstractionObserver]: Analyzing ICFG array_of_struct_ptr_flag_init.i [2020-09-25 02:17:57,616 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 02:17:57,626 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 02:17:57,645 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 02:17:57,674 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 02:17:57,675 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 02:17:57,675 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 02:17:57,675 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 02:17:57,675 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 02:17:57,675 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 02:17:57,675 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 02:17:57,675 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 02:17:57,700 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states. [2020-09-25 02:17:57,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 02:17:57,709 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:17:57,711 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] [2020-09-25 02:17:57,711 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:17:57,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:17:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1392671971, now seen corresponding path program 1 times [2020-09-25 02:17:57,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:17:57,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011203067] [2020-09-25 02:17:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:17:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:17:57,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:57,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:58,170 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:17:58,170 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 02:17:58,171 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:17:58,171 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 295 [2020-09-25 02:17:58,177 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:17:58,177 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:17:58,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-09-25 02:17:58,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:17:58,178 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-09-25 02:17:58,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:17:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:17:58,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:58,321 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:17:58,322 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:17:58,324 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:17:58,324 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 20 [2020-09-25 02:17:58,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:17:58,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:17:58,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:17:58,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:17:58,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:17:58,377 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:17:58,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:17:58,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:58,395 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:17:58,395 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:17:58,396 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:17:58,396 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 13 [2020-09-25 02:17:58,396 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:17:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:17:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 7 [2020-09-25 02:17:58,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:17:58,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:17:58,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:17:58,408 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011203067] [2020-09-25 02:17:58,410 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:17:58,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 02:17:58,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737266476] [2020-09-25 02:17:58,418 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 02:17:58,418 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:17:58,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 02:17:58,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 02:17:58,435 INFO L87 Difference]: Start difference. First operand 56 states. Second operand 4 states. [2020-09-25 02:17:58,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:17:58,672 INFO L93 Difference]: Finished difference Result 94 states and 111 transitions. [2020-09-25 02:17:58,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-25 02:17:58,674 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 29 [2020-09-25 02:17:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:17:58,694 INFO L225 Difference]: With dead ends: 94 [2020-09-25 02:17:58,694 INFO L226 Difference]: Without dead ends: 53 [2020-09-25 02:17:58,700 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:17:58,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-09-25 02:17:58,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2020-09-25 02:17:58,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-25 02:17:58,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-09-25 02:17:58,772 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2020-09-25 02:17:58,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:17:58,773 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-09-25 02:17:58,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 02:17:58,775 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-09-25 02:17:58,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-25 02:17:58,778 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:17:58,779 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] [2020-09-25 02:17:58,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 02:17:58,780 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:17:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:17:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash 31734745, now seen corresponding path program 1 times [2020-09-25 02:17:58,782 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:17:58,783 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899581482] [2020-09-25 02:17:58,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:17:58,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:17:58,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:58,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:59,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:17:59,142 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-25 02:17:59,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:17:59,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 320 [2020-09-25 02:17:59,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:17:59,143 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-25 02:17:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 28 [2020-09-25 02:17:59,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-25 02:17:59,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:17:59,178 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:17:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:17:59,183 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:59,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:17:59,190 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:17:59,190 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:17:59,190 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 8 [2020-09-25 02:17:59,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:17:59,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:17:59,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:17:59,191 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:17:59,191 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:17:59,214 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:17:59,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:17:59,218 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:59,223 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:59,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:17:59,254 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:17:59,254 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:17:59,254 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 36 [2020-09-25 02:17:59,254 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:17:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:17:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:17:59,255 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:17:59,255 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:17:59,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 02:17:59,261 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899581482] [2020-09-25 02:17:59,261 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:17:59,261 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2020-09-25 02:17:59,262 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855891305] [2020-09-25 02:17:59,264 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 02:17:59,264 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:17:59,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 02:17:59,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-09-25 02:17:59,265 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 5 states. [2020-09-25 02:17:59,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:17:59,452 INFO L93 Difference]: Finished difference Result 83 states and 93 transitions. [2020-09-25 02:17:59,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 02:17:59,453 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 29 [2020-09-25 02:17:59,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:17:59,456 INFO L225 Difference]: With dead ends: 83 [2020-09-25 02:17:59,457 INFO L226 Difference]: Without dead ends: 68 [2020-09-25 02:17:59,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-25 02:17:59,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-25 02:17:59,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 50. [2020-09-25 02:17:59,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-25 02:17:59,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 54 transitions. [2020-09-25 02:17:59,473 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 54 transitions. Word has length 29 [2020-09-25 02:17:59,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:17:59,474 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 54 transitions. [2020-09-25 02:17:59,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 02:17:59,474 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 54 transitions. [2020-09-25 02:17:59,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-09-25 02:17:59,476 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:17:59,476 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:17:59,476 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 02:17:59,476 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:17:59,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:17:59,477 INFO L82 PathProgramCache]: Analyzing trace with hash 215899159, now seen corresponding path program 1 times [2020-09-25 02:17:59,477 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:17:59,477 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117439018] [2020-09-25 02:17:59,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:17:59,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:17:59,502 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:59,527 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:17:59,778 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:01,181 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:01,181 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 47 [2020-09-25 02:18:01,181 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 02:18:01,182 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1688 [2020-09-25 02:18:01,182 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:01,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:18:01,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:18:01,183 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-09-25 02:18:01,183 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:01,209 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:01,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:01,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:01,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:01,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:18:01,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:01,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:18:01,219 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:01,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:01,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:01,219 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:01,220 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:01,234 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:18:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:01,242 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:01,264 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:01,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 13 [2020-09-25 02:18:01,265 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:01,265 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 24 [2020-09-25 02:18:01,265 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:01,265 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:18:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 02:18:01,266 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-09-25 02:18:01,266 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:01,300 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:18:01,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117439018] [2020-09-25 02:18:01,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 02:18:01,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2020-09-25 02:18:01,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983995956] [2020-09-25 02:18:01,302 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:18:01,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:01,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:18:01,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:18:01,303 INFO L87 Difference]: Start difference. First operand 50 states and 54 transitions. Second operand 7 states. [2020-09-25 02:18:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:01,613 INFO L93 Difference]: Finished difference Result 83 states and 91 transitions. [2020-09-25 02:18:01,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 02:18:01,613 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 36 [2020-09-25 02:18:01,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:01,617 INFO L225 Difference]: With dead ends: 83 [2020-09-25 02:18:01,617 INFO L226 Difference]: Without dead ends: 55 [2020-09-25 02:18:01,618 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-09-25 02:18:01,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-25 02:18:01,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 51. [2020-09-25 02:18:01,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 02:18:01,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 55 transitions. [2020-09-25 02:18:01,636 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 55 transitions. Word has length 36 [2020-09-25 02:18:01,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:01,638 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 55 transitions. [2020-09-25 02:18:01,638 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:18:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 55 transitions. [2020-09-25 02:18:01,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 02:18:01,640 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:01,640 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:18:01,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 02:18:01,641 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:01,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:01,642 INFO L82 PathProgramCache]: Analyzing trace with hash 1068819611, now seen corresponding path program 1 times [2020-09-25 02:18:01,642 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:01,643 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [83590482] [2020-09-25 02:18:01,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:01,671 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:01,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:01,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:02,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:03,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:06,662 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:06,663 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 02:18:06,663 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:18:06,663 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 02:18:06,663 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 02:18:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 34 [2020-09-25 02:18:06,664 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-09-25 02:18:06,664 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:06,710 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:06,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:06,713 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:06,718 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:06,718 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:18:06,719 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:06,719 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:18:06,719 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:06,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:06,719 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:06,720 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:06,720 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:06,736 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:18:06,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:06,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:06,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:06,827 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:06,828 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 02:18:06,828 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:18:06,828 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 88 [2020-09-25 02:18:06,828 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:06,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:06,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:06,829 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:06,829 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:06,836 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-09-25 02:18:06,837 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [83590482] [2020-09-25 02:18:06,837 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:18:06,837 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 02:18:06,837 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425184234] [2020-09-25 02:18:06,838 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 02:18:06,838 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:06,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 02:18:06,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 02:18:06,839 INFO L87 Difference]: Start difference. First operand 51 states and 55 transitions. Second operand 7 states. [2020-09-25 02:18:07,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:07,040 INFO L93 Difference]: Finished difference Result 90 states and 100 transitions. [2020-09-25 02:18:07,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 02:18:07,041 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-25 02:18:07,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:07,042 INFO L225 Difference]: With dead ends: 90 [2020-09-25 02:18:07,043 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 02:18:07,043 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2020-09-25 02:18:07,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 02:18:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 60. [2020-09-25 02:18:07,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 02:18:07,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2020-09-25 02:18:07,053 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 42 [2020-09-25 02:18:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:07,053 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2020-09-25 02:18:07,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 02:18:07,054 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2020-09-25 02:18:07,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-09-25 02:18:07,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:07,055 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 02:18:07,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 02:18:07,056 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:07,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:07,056 INFO L82 PathProgramCache]: Analyzing trace with hash 589608213, now seen corresponding path program 2 times [2020-09-25 02:18:07,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:07,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245300709] [2020-09-25 02:18:07,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:07,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:07,077 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:07,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:07,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:08,471 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:09,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:11,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:12,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:12,070 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 02:18:12,070 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-09-25 02:18:12,071 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-09-25 02:18:12,071 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:12,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:18:12,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:18:12,072 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 02:18:12,073 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:12,119 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:12,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:12,122 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:12,127 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:12,128 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:18:12,128 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:12,129 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 02:18:12,129 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:12,129 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:12,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:12,130 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:12,130 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:12,149 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:18:12,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:12,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:12,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:12,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 19 [2020-09-25 02:18:12,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:12,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 111 [2020-09-25 02:18:12,272 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:18:12,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 02:18:12,274 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 02:18:12,274 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:12,363 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-09-25 02:18:12,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245300709] [2020-09-25 02:18:12,365 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:18:12,365 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 02:18:12,365 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395180617] [2020-09-25 02:18:12,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 02:18:12,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:12,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 02:18:12,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:18:12,370 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand 9 states. [2020-09-25 02:18:12,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:12,824 INFO L93 Difference]: Finished difference Result 107 states and 117 transitions. [2020-09-25 02:18:12,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 02:18:12,825 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 49 [2020-09-25 02:18:12,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:12,827 INFO L225 Difference]: With dead ends: 107 [2020-09-25 02:18:12,827 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 02:18:12,829 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-25 02:18:12,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 02:18:12,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2020-09-25 02:18:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-25 02:18:12,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 71 transitions. [2020-09-25 02:18:12,847 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 71 transitions. Word has length 49 [2020-09-25 02:18:12,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:12,847 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 71 transitions. [2020-09-25 02:18:12,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 02:18:12,847 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 71 transitions. [2020-09-25 02:18:12,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-25 02:18:12,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:12,855 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 02:18:12,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 02:18:12,855 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:12,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:12,857 INFO L82 PathProgramCache]: Analyzing trace with hash 92742417, now seen corresponding path program 3 times [2020-09-25 02:18:12,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:12,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1378298269] [2020-09-25 02:18:12,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:12,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:12,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:12,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:13,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:14,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:17,887 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:17,888 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 66 [2020-09-25 02:18:17,888 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:18:17,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5013 [2020-09-25 02:18:17,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:17,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 02:18:17,893 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 40 [2020-09-25 02:18:17,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-09-25 02:18:17,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:18,003 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:18,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:18,016 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:18,016 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:18:18,016 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:18,016 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 10 [2020-09-25 02:18:18,017 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:18,017 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:18,017 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:18,034 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:18:18,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:18,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:18,052 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:18,160 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:18,160 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 02:18:18,160 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:18:18,160 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-25 02:18:18,161 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:18,161 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:18,162 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-09-25 02:18:18,173 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1378298269] [2020-09-25 02:18:18,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:18:18,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 02:18:18,175 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998893831] [2020-09-25 02:18:18,176 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 02:18:18,176 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:18,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 02:18:18,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-25 02:18:18,177 INFO L87 Difference]: Start difference. First operand 66 states and 71 transitions. Second operand 9 states. [2020-09-25 02:18:18,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:18,415 INFO L93 Difference]: Finished difference Result 104 states and 115 transitions. [2020-09-25 02:18:18,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 02:18:18,415 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 55 [2020-09-25 02:18:18,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:18,417 INFO L225 Difference]: With dead ends: 104 [2020-09-25 02:18:18,417 INFO L226 Difference]: Without dead ends: 89 [2020-09-25 02:18:18,418 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-09-25 02:18:18,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-25 02:18:18,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 75. [2020-09-25 02:18:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-25 02:18:18,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 81 transitions. [2020-09-25 02:18:18,426 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 81 transitions. Word has length 55 [2020-09-25 02:18:18,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:18,426 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 81 transitions. [2020-09-25 02:18:18,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 02:18:18,427 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 81 transitions. [2020-09-25 02:18:18,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 02:18:18,428 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:18,428 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 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] [2020-09-25 02:18:18,428 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 02:18:18,428 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:18,429 INFO L82 PathProgramCache]: Analyzing trace with hash -138713633, now seen corresponding path program 4 times [2020-09-25 02:18:18,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:18,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1677658972] [2020-09-25 02:18:18,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:18,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:18,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:18,501 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:18,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:18,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:18,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:23,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:23,454 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 73 [2020-09-25 02:18:23,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 02:18:23,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-09-25 02:18:23,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:23,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:18:23,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:18:23,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-09-25 02:18:23,460 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:23,489 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:23,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:23,492 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:23,496 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:23,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:18:23,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:23,496 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-25 02:18:23,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:23,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:23,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:23,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:23,511 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:18:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:23,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:23,623 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:23,624 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-09-25 02:18:23,624 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:23,624 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-25 02:18:23,624 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:18:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 02:18:23,625 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-09-25 02:18:23,625 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:23,904 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-09-25 02:18:23,905 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1677658972] [2020-09-25 02:18:23,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:18:23,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:18:23,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554489820] [2020-09-25 02:18:23,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:18:23,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:23,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:18:23,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:18:23,911 INFO L87 Difference]: Start difference. First operand 75 states and 81 transitions. Second operand 11 states. [2020-09-25 02:18:24,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:24,296 INFO L93 Difference]: Finished difference Result 131 states and 143 transitions. [2020-09-25 02:18:24,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 02:18:24,297 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 62 [2020-09-25 02:18:24,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:24,298 INFO L225 Difference]: With dead ends: 131 [2020-09-25 02:18:24,298 INFO L226 Difference]: Without dead ends: 85 [2020-09-25 02:18:24,299 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=93, Invalid=249, Unknown=0, NotChecked=0, Total=342 [2020-09-25 02:18:24,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-25 02:18:24,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 81. [2020-09-25 02:18:24,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 02:18:24,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 87 transitions. [2020-09-25 02:18:24,314 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 87 transitions. Word has length 62 [2020-09-25 02:18:24,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:24,316 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 87 transitions. [2020-09-25 02:18:24,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:18:24,317 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 87 transitions. [2020-09-25 02:18:24,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2020-09-25 02:18:24,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:24,320 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 02:18:24,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 02:18:24,320 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:24,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:24,321 INFO L82 PathProgramCache]: Analyzing trace with hash 1237619043, now seen corresponding path program 5 times [2020-09-25 02:18:24,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:24,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954877293] [2020-09-25 02:18:24,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:24,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:24,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:24,390 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:24,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:24,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:24,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:24,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:25,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:29,345 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:29,345 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 79 [2020-09-25 02:18:29,345 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 02:18:29,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-09-25 02:18:29,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 02:18:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 46 [2020-09-25 02:18:29,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 02:18:29,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:29,426 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:29,429 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:29,434 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:29,434 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:18:29,434 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:29,435 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:18:29,435 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:29,459 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:18:29,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:29,464 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:29,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:29,651 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:29,652 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 02:18:29,652 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 02:18:29,653 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 189 [2020-09-25 02:18:29,653 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:29,653 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:29,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:29,654 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:29,654 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:29,689 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2020-09-25 02:18:29,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954877293] [2020-09-25 02:18:29,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:18:29,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 02:18:29,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924566152] [2020-09-25 02:18:29,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 02:18:29,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:29,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 02:18:29,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-25 02:18:29,692 INFO L87 Difference]: Start difference. First operand 81 states and 87 transitions. Second operand 11 states. [2020-09-25 02:18:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:29,924 INFO L93 Difference]: Finished difference Result 119 states and 131 transitions. [2020-09-25 02:18:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-25 02:18:29,925 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 68 [2020-09-25 02:18:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:29,926 INFO L225 Difference]: With dead ends: 119 [2020-09-25 02:18:29,926 INFO L226 Difference]: Without dead ends: 104 [2020-09-25 02:18:29,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2020-09-25 02:18:29,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-25 02:18:29,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 90. [2020-09-25 02:18:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-25 02:18:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 97 transitions. [2020-09-25 02:18:29,935 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 97 transitions. Word has length 68 [2020-09-25 02:18:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:29,935 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 97 transitions. [2020-09-25 02:18:29,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 02:18:29,936 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 97 transitions. [2020-09-25 02:18:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-25 02:18:29,937 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:29,937 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 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] [2020-09-25 02:18:29,937 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 02:18:29,937 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:29,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:29,938 INFO L82 PathProgramCache]: Analyzing trace with hash -330918067, now seen corresponding path program 6 times [2020-09-25 02:18:29,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:29,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [773323438] [2020-09-25 02:18:29,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:29,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:29,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:30,007 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:30,061 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:30,187 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:30,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:30,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:30,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:30,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:31,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:31,240 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:34,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:34,956 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 86 [2020-09-25 02:18:34,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 10 [2020-09-25 02:18:34,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5001 [2020-09-25 02:18:34,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:18:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-09-25 02:18:34,958 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-09-25 02:18:34,959 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:34,994 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 02:18:34,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:34,996 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:35,001 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:35,001 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 11 [2020-09-25 02:18:35,001 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:35,002 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-09-25 02:18:35,002 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 02:18:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 02:18:35,002 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 02:18:35,003 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 02:18:35,016 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2020-09-25 02:18:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:35,034 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:35,216 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 02:18:35,216 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 31 [2020-09-25 02:18:35,217 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 02:18:35,217 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 190 [2020-09-25 02:18:35,217 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-09-25 02:18:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 02:18:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 4 [2020-09-25 02:18:35,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-25 02:18:35,219 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 02:18:35,603 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2020-09-25 02:18:35,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [773323438] [2020-09-25 02:18:35,611 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 02:18:35,611 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-25 02:18:35,612 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567925315] [2020-09-25 02:18:35,613 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-25 02:18:35,613 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 02:18:35,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-25 02:18:35,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-25 02:18:35,614 INFO L87 Difference]: Start difference. First operand 90 states and 97 transitions. Second operand 13 states. [2020-09-25 02:18:36,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 02:18:36,070 INFO L93 Difference]: Finished difference Result 155 states and 169 transitions. [2020-09-25 02:18:36,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-25 02:18:36,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 75 [2020-09-25 02:18:36,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 02:18:36,071 INFO L225 Difference]: With dead ends: 155 [2020-09-25 02:18:36,071 INFO L226 Difference]: Without dead ends: 100 [2020-09-25 02:18:36,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2020-09-25 02:18:36,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-25 02:18:36,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 96. [2020-09-25 02:18:36,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-25 02:18:36,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 103 transitions. [2020-09-25 02:18:36,081 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 103 transitions. Word has length 75 [2020-09-25 02:18:36,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 02:18:36,082 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 103 transitions. [2020-09-25 02:18:36,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-25 02:18:36,082 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 103 transitions. [2020-09-25 02:18:36,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2020-09-25 02:18:36,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 02:18:36,085 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-09-25 02:18:36,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 02:18:36,085 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 02:18:36,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 02:18:36,086 INFO L82 PathProgramCache]: Analyzing trace with hash -1474870711, now seen corresponding path program 7 times [2020-09-25 02:18:36,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 02:18:36,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1633797754] [2020-09-25 02:18:36,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 02:18:36,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 02:18:36,118 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:36,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:36,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:36,388 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:36,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:37,505 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:37,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:38,782 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 02:18:39,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking...