/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 SequenceOfStatements --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=BIGGEST --traceabstraction.additional.smt.options log-additional-information=true --traceabstraction.additional.smt.options unknown-allowed=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-12 09:51:14,721 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-12 09:51:14,724 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-12 09:51:14,771 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-12 09:51:14,772 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-12 09:51:14,783 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-12 09:51:14,784 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-12 09:51:14,787 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-12 09:51:14,789 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-12 09:51:14,792 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-12 09:51:14,793 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-12 09:51:14,795 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-12 09:51:14,796 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-12 09:51:14,799 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-12 09:51:14,802 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-12 09:51:14,805 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-12 09:51:14,806 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-12 09:51:14,808 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-12 09:51:14,810 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-12 09:51:14,816 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-12 09:51:14,818 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-12 09:51:14,822 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-12 09:51:14,823 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-12 09:51:14,824 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-12 09:51:14,826 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-12 09:51:14,826 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-12 09:51:14,826 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-12 09:51:14,827 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-12 09:51:14,827 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-12 09:51:14,828 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-12 09:51:14,828 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-12 09:51:14,829 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-12 09:51:14,830 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-12 09:51:14,830 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-12 09:51:14,831 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-12 09:51:14,832 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-12 09:51:14,832 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-12 09:51:14,832 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-12 09:51:14,833 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-12 09:51:14,833 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-12 09:51:14,834 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-12 09:51:14,835 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-12 09:51:14,856 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-12 09:51:14,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-12 09:51:14,858 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-12 09:51:14,858 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-12 09:51:14,858 INFO L138 SettingsManager]: * Use SBE=true [2020-10-12 09:51:14,859 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-12 09:51:14,859 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-12 09:51:14,859 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-12 09:51:14,859 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-12 09:51:14,859 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-12 09:51:14,860 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-12 09:51:14,860 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-12 09:51:14,860 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-12 09:51:14,860 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-12 09:51:14,860 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-12 09:51:14,861 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-12 09:51:14,861 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-12 09:51:14,861 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-12 09:51:14,861 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-12 09:51:14,862 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-12 09:51:14,862 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-12 09:51:14,862 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:14,862 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-12 09:51:14,862 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-12 09:51:14,863 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-12 09:51:14,863 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-12 09:51:14,863 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-12 09:51:14,863 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-12 09:51:14,863 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-12 09:51:14,864 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 -> SequenceOfStatements Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=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=BIGGEST;log-additional-information=true;unknown-allowed=true; [2020-10-12 09:51:15,156 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-12 09:51:15,168 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-12 09:51:15,172 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-12 09:51:15,174 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-12 09:51:15,174 INFO L275 PluginConnector]: CDTParser initialized [2020-10-12 09:51:15,175 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2020-10-12 09:51:15,239 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0cc839d6/9c16165ac5c3472dbd0c2b010faa0e4c/FLAGf67391bea [2020-10-12 09:51:15,745 INFO L306 CDTParser]: Found 1 translation units. [2020-10-12 09:51:15,746 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy7_ground-2.i [2020-10-12 09:51:15,753 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0cc839d6/9c16165ac5c3472dbd0c2b010faa0e4c/FLAGf67391bea [2020-10-12 09:51:16,179 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b0cc839d6/9c16165ac5c3472dbd0c2b010faa0e4c [2020-10-12 09:51:16,190 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-12 09:51:16,192 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-12 09:51:16,196 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:16,196 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-12 09:51:16,200 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-12 09:51:16,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,204 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@f7e743c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16, skipping insertion in model container [2020-10-12 09:51:16,204 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,211 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-12 09:51:16,227 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-12 09:51:16,406 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:16,410 INFO L203 MainTranslator]: Completed pre-run [2020-10-12 09:51:16,442 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-12 09:51:16,463 INFO L208 MainTranslator]: Completed translation [2020-10-12 09:51:16,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16 WrapperNode [2020-10-12 09:51:16,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-12 09:51:16,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-12 09:51:16,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-12 09:51:16,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-12 09:51:16,562 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,562 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,571 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,571 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,592 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,601 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,605 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... [2020-10-12 09:51:16,608 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-12 09:51:16,609 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-12 09:51:16,609 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-12 09:51:16,609 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-12 09:51:16,610 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-12 09:51:16,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-12 09:51:16,670 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-12 09:51:16,670 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-12 09:51:16,670 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-12 09:51:16,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-12 09:51:16,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-12 09:51:16,671 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-12 09:51:16,671 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-12 09:51:16,671 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-12 09:51:16,671 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-12 09:51:16,672 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-12 09:51:16,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-12 09:51:16,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-12 09:51:16,672 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-12 09:51:17,009 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-12 09:51:17,009 INFO L295 CfgBuilder]: Removed 9 assume(true) statements. [2020-10-12 09:51:17,014 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:17 BoogieIcfgContainer [2020-10-12 09:51:17,014 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-12 09:51:17,016 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-12 09:51:17,016 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-12 09:51:17,020 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-12 09:51:17,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.10 09:51:16" (1/3) ... [2020-10-12 09:51:17,023 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cc159e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:17, skipping insertion in model container [2020-10-12 09:51:17,023 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.10 09:51:16" (2/3) ... [2020-10-12 09:51:17,024 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@25cc159e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.10 09:51:17, skipping insertion in model container [2020-10-12 09:51:17,024 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.10 09:51:17" (3/3) ... [2020-10-12 09:51:17,026 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy7_ground-2.i [2020-10-12 09:51:17,041 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-12 09:51:17,051 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-12 09:51:17,070 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-12 09:51:17,107 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-12 09:51:17,107 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-12 09:51:17,108 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-12 09:51:17,108 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-12 09:51:17,108 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-12 09:51:17,109 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-12 09:51:17,109 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-12 09:51:17,109 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-12 09:51:17,133 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states. [2020-10-12 09:51:17,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-12 09:51:17,142 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:17,146 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:17,147 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:17,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:17,159 INFO L82 PathProgramCache]: Analyzing trace with hash -2029657296, now seen corresponding path program 1 times [2020-10-12 09:51:17,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:17,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1102239591] [2020-10-12 09:51:17,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:17,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:17,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,709 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:17,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:19,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-12 09:51:19,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:51:19,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1975 [2020-10-12 09:51:19,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:19,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-12 09:51:19,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:19,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-12 09:51:19,278 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:19,337 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:19,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:19,341 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,343 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:19,343 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:19,344 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:19,344 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:19,344 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:19,345 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:19,345 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:19,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-12 09:51:19,355 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1102239591] [2020-10-12 09:51:19,357 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-12 09:51:19,357 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-12 09:51:19,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824688879] [2020-10-12 09:51:19,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-12 09:51:19,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:19,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-12 09:51:19,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:19,384 INFO L87 Difference]: Start difference. First operand 45 states. Second operand 4 states. [2020-10-12 09:51:19,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:19,600 INFO L93 Difference]: Finished difference Result 96 states and 145 transitions. [2020-10-12 09:51:19,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-12 09:51:19,602 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 27 [2020-10-12 09:51:19,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:19,613 INFO L225 Difference]: With dead ends: 96 [2020-10-12 09:51:19,613 INFO L226 Difference]: Without dead ends: 54 [2020-10-12 09:51:19,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-12 09:51:19,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-12 09:51:19,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 47. [2020-10-12 09:51:19,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-12 09:51:19,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 55 transitions. [2020-10-12 09:51:19,663 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 55 transitions. Word has length 27 [2020-10-12 09:51:19,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:19,664 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 55 transitions. [2020-10-12 09:51:19,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-12 09:51:19,664 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 55 transitions. [2020-10-12 09:51:19,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-12 09:51:19,666 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:19,666 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:19,666 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-12 09:51:19,666 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:19,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:19,667 INFO L82 PathProgramCache]: Analyzing trace with hash -864373520, now seen corresponding path program 1 times [2020-10-12 09:51:19,667 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:19,668 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [836712826] [2020-10-12 09:51:19,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:19,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:19,689 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:19,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:20,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:21,697 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:24,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-12 09:51:24,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 8 [2020-10-12 09:51:24,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-12 09:51:24,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:24,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-12 09:51:24,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 25 [2020-10-12 09:51:24,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-12 09:51:24,704 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-10-12 09:51:24,749 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:24,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:24,755 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:24,759 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:24,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:24,760 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:24,760 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-12 09:51:24,760 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:24,760 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:24,761 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:24,761 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:24,768 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-12 09:51:24,770 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [836712826] [2020-10-12 09:51:24,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:24,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-12 09:51:24,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030549353] [2020-10-12 09:51:24,777 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-12 09:51:24,778 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:24,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-12 09:51:24,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:24,779 INFO L87 Difference]: Start difference. First operand 47 states and 55 transitions. Second operand 5 states. [2020-10-12 09:51:25,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:25,034 INFO L93 Difference]: Finished difference Result 103 states and 124 transitions. [2020-10-12 09:51:25,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-12 09:51:25,035 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 41 [2020-10-12 09:51:25,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:25,037 INFO L225 Difference]: With dead ends: 103 [2020-10-12 09:51:25,038 INFO L226 Difference]: Without dead ends: 68 [2020-10-12 09:51:25,039 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-12 09:51:25,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-12 09:51:25,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 61. [2020-10-12 09:51:25,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-12 09:51:25,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 69 transitions. [2020-10-12 09:51:25,064 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 69 transitions. Word has length 41 [2020-10-12 09:51:25,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:25,065 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 69 transitions. [2020-10-12 09:51:25,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-12 09:51:25,065 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 69 transitions. [2020-10-12 09:51:25,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-10-12 09:51:25,070 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:25,071 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:25,071 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-12 09:51:25,071 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:25,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:25,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1301663170, now seen corresponding path program 2 times [2020-10-12 09:51:25,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:25,074 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [138957067] [2020-10-12 09:51:25,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:25,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:25,105 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,174 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,232 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:25,392 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,103 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:30,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 63 [2020-10-12 09:51:30,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:30,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-12 09:51:30,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:30,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-12 09:51:30,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:51:30,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-12 09:51:30,106 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:30,161 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:30,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:30,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,166 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:30,166 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:30,167 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:30,167 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-12 09:51:30,168 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:30,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:30,168 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:30,169 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:30,169 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:30,178 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2020-10-12 09:51:30,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [138957067] [2020-10-12 09:51:30,179 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:30,179 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-12 09:51:30,179 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447911715] [2020-10-12 09:51:30,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-12 09:51:30,182 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:30,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-12 09:51:30,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:30,183 INFO L87 Difference]: Start difference. First operand 61 states and 69 transitions. Second operand 6 states. [2020-10-12 09:51:30,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:30,499 INFO L93 Difference]: Finished difference Result 129 states and 150 transitions. [2020-10-12 09:51:30,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-12 09:51:30,499 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 55 [2020-10-12 09:51:30,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:30,502 INFO L225 Difference]: With dead ends: 129 [2020-10-12 09:51:30,503 INFO L226 Difference]: Without dead ends: 82 [2020-10-12 09:51:30,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-12 09:51:30,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-12 09:51:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 75. [2020-10-12 09:51:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-12 09:51:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 83 transitions. [2020-10-12 09:51:30,525 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 83 transitions. Word has length 55 [2020-10-12 09:51:30,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:30,526 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 83 transitions. [2020-10-12 09:51:30,526 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-12 09:51:30,527 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 83 transitions. [2020-10-12 09:51:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-10-12 09:51:30,531 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:30,532 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:30,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-12 09:51:30,533 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:30,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:30,533 INFO L82 PathProgramCache]: Analyzing trace with hash 1157140244, now seen corresponding path program 3 times [2020-10-12 09:51:30,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:30,534 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1966784882] [2020-10-12 09:51:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:30,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:30,560 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,573 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:30,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,565 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:35,572 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 77 [2020-10-12 09:51:35,573 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:35,573 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-12 09:51:35,574 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-12 09:51:35,574 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-12 09:51:35,575 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-12 09:51:35,575 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:35,635 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:35,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:35,637 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,639 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:35,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:35,640 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:35,640 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:35,640 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:35,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:35,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:35,641 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:35,641 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:35,655 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2020-10-12 09:51:35,656 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1966784882] [2020-10-12 09:51:35,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:35,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-12 09:51:35,657 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152454780] [2020-10-12 09:51:35,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-12 09:51:35,659 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:35,659 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-12 09:51:35,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:35,660 INFO L87 Difference]: Start difference. First operand 75 states and 83 transitions. Second operand 7 states. [2020-10-12 09:51:35,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:35,941 INFO L93 Difference]: Finished difference Result 155 states and 176 transitions. [2020-10-12 09:51:35,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-12 09:51:35,942 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 69 [2020-10-12 09:51:35,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:35,943 INFO L225 Difference]: With dead ends: 155 [2020-10-12 09:51:35,943 INFO L226 Difference]: Without dead ends: 96 [2020-10-12 09:51:35,946 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-12 09:51:35,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-12 09:51:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 89. [2020-10-12 09:51:35,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-12 09:51:35,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 97 transitions. [2020-10-12 09:51:35,964 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 97 transitions. Word has length 69 [2020-10-12 09:51:35,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:35,965 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 97 transitions. [2020-10-12 09:51:35,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-12 09:51:35,965 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 97 transitions. [2020-10-12 09:51:35,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-12 09:51:35,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:35,968 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:35,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-12 09:51:35,969 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:35,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:35,969 INFO L82 PathProgramCache]: Analyzing trace with hash 81926374, now seen corresponding path program 4 times [2020-10-12 09:51:35,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:35,970 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [842528992] [2020-10-12 09:51:35,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:35,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:35,995 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,016 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,032 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:36,051 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:37,239 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:40,984 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:40,985 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-12 09:51:40,985 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:40,986 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-12 09:51:40,986 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:40,986 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-12 09:51:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 33 [2020-10-12 09:51:40,987 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-12 09:51:40,987 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:41,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:41,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,066 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:41,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:41,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:41,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:41,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:41,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:41,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:41,077 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 96 trivial. 0 not checked. [2020-10-12 09:51:41,077 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [842528992] [2020-10-12 09:51:41,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:41,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-12 09:51:41,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152342106] [2020-10-12 09:51:41,079 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-12 09:51:41,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:41,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-12 09:51:41,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:41,080 INFO L87 Difference]: Start difference. First operand 89 states and 97 transitions. Second operand 8 states. [2020-10-12 09:51:41,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:41,362 INFO L93 Difference]: Finished difference Result 181 states and 202 transitions. [2020-10-12 09:51:41,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-12 09:51:41,363 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 83 [2020-10-12 09:51:41,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:41,364 INFO L225 Difference]: With dead ends: 181 [2020-10-12 09:51:41,364 INFO L226 Difference]: Without dead ends: 110 [2020-10-12 09:51:41,365 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-12 09:51:41,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-12 09:51:41,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 103. [2020-10-12 09:51:41,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-12 09:51:41,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 111 transitions. [2020-10-12 09:51:41,375 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 111 transitions. Word has length 83 [2020-10-12 09:51:41,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:41,375 INFO L479 AbstractCegarLoop]: Abstraction has 103 states and 111 transitions. [2020-10-12 09:51:41,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-12 09:51:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 111 transitions. [2020-10-12 09:51:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-12 09:51:41,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:41,377 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:41,377 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-12 09:51:41,378 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:41,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:41,378 INFO L82 PathProgramCache]: Analyzing trace with hash -2036757704, now seen corresponding path program 5 times [2020-10-12 09:51:41,378 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:41,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2047909261] [2020-10-12 09:51:41,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:41,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:41,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:41,460 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:42,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,427 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:46,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-12 09:51:46,428 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:46,428 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-12 09:51:46,428 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-12 09:51:46,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:51:46,429 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-12 09:51:46,429 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:46,524 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:46,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:46,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:46,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:46,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:46,529 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:46,529 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:46,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:46,530 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:46,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:46,534 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-12 09:51:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 175 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 150 trivial. 0 not checked. [2020-10-12 09:51:46,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2047909261] [2020-10-12 09:51:46,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:46,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-12 09:51:46,549 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441811482] [2020-10-12 09:51:46,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-12 09:51:46,550 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:46,550 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-12 09:51:46,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:46,551 INFO L87 Difference]: Start difference. First operand 103 states and 111 transitions. Second operand 9 states. [2020-10-12 09:51:46,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:46,876 INFO L93 Difference]: Finished difference Result 207 states and 228 transitions. [2020-10-12 09:51:46,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-12 09:51:46,876 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 97 [2020-10-12 09:51:46,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:46,877 INFO L225 Difference]: With dead ends: 207 [2020-10-12 09:51:46,878 INFO L226 Difference]: Without dead ends: 124 [2020-10-12 09:51:46,879 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-12 09:51:46,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-12 09:51:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2020-10-12 09:51:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-12 09:51:46,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 125 transitions. [2020-10-12 09:51:46,889 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 125 transitions. Word has length 97 [2020-10-12 09:51:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:46,890 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 125 transitions. [2020-10-12 09:51:46,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-12 09:51:46,890 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 125 transitions. [2020-10-12 09:51:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2020-10-12 09:51:46,891 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:46,892 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:46,892 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-12 09:51:46,892 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:46,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:46,893 INFO L82 PathProgramCache]: Analyzing trace with hash 2087585290, now seen corresponding path program 6 times [2020-10-12 09:51:46,893 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:46,893 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [646659017] [2020-10-12 09:51:46,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:46,907 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,939 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:46,982 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:49,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:51,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:51,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 119 [2020-10-12 09:51:51,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:51,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-12 09:51:51,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:51,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-12 09:51:51,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 27 [2020-10-12 09:51:51,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-12 09:51:51,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:52,005 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:52,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:52,008 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:52,008 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:52,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:51:52,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:52,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:52,009 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:52,009 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2020-10-12 09:51:52,019 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [646659017] [2020-10-12 09:51:52,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:52,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-12 09:51:52,020 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412992183] [2020-10-12 09:51:52,020 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-12 09:51:52,020 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:52,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-12 09:51:52,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:52,021 INFO L87 Difference]: Start difference. First operand 117 states and 125 transitions. Second operand 10 states. [2020-10-12 09:51:52,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:52,329 INFO L93 Difference]: Finished difference Result 233 states and 254 transitions. [2020-10-12 09:51:52,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-12 09:51:52,330 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 111 [2020-10-12 09:51:52,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:52,331 INFO L225 Difference]: With dead ends: 233 [2020-10-12 09:51:52,331 INFO L226 Difference]: Without dead ends: 138 [2020-10-12 09:51:52,332 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-12 09:51:52,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-12 09:51:52,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 131. [2020-10-12 09:51:52,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-12 09:51:52,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 139 transitions. [2020-10-12 09:51:52,349 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 139 transitions. Word has length 111 [2020-10-12 09:51:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:52,350 INFO L479 AbstractCegarLoop]: Abstraction has 131 states and 139 transitions. [2020-10-12 09:51:52,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-12 09:51:52,350 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 139 transitions. [2020-10-12 09:51:52,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2020-10-12 09:51:52,351 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:52,352 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:52,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-12 09:51:52,352 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:52,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:52,353 INFO L82 PathProgramCache]: Analyzing trace with hash -474568356, now seen corresponding path program 7 times [2020-10-12 09:51:52,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:52,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [391106049] [2020-10-12 09:51:52,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:52,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:52,370 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:52,476 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:55,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:57,398 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:57,398 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 133 [2020-10-12 09:51:57,398 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-12 09:51:57,398 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-12 09:51:57,398 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:57,398 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-12 09:51:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 61 [2020-10-12 09:51:57,399 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-12 09:51:57,399 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:51:57,515 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:51:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:57,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:57,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:51:57,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:51:57,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:51:57,522 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-12 09:51:57,522 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:51:57,522 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:51:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:51:57,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:51:57,523 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:51:57,546 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 294 trivial. 0 not checked. [2020-10-12 09:51:57,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [391106049] [2020-10-12 09:51:57,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:51:57,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-12 09:51:57,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689401867] [2020-10-12 09:51:57,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-12 09:51:57,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:51:57,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-12 09:51:57,550 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:57,550 INFO L87 Difference]: Start difference. First operand 131 states and 139 transitions. Second operand 11 states. [2020-10-12 09:51:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:51:58,052 INFO L93 Difference]: Finished difference Result 259 states and 280 transitions. [2020-10-12 09:51:58,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-12 09:51:58,053 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 125 [2020-10-12 09:51:58,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:51:58,054 INFO L225 Difference]: With dead ends: 259 [2020-10-12 09:51:58,055 INFO L226 Difference]: Without dead ends: 152 [2020-10-12 09:51:58,056 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-12 09:51:58,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2020-10-12 09:51:58,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 145. [2020-10-12 09:51:58,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-12 09:51:58,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 153 transitions. [2020-10-12 09:51:58,080 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 153 transitions. Word has length 125 [2020-10-12 09:51:58,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:51:58,080 INFO L479 AbstractCegarLoop]: Abstraction has 145 states and 153 transitions. [2020-10-12 09:51:58,081 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-12 09:51:58,081 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 153 transitions. [2020-10-12 09:51:58,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-12 09:51:58,086 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:51:58,086 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:51:58,087 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-12 09:51:58,087 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:51:58,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:51:58,087 INFO L82 PathProgramCache]: Analyzing trace with hash 382899502, now seen corresponding path program 8 times [2020-10-12 09:51:58,088 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:51:58,091 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343483766] [2020-10-12 09:51:58,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:51:58,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:51:58,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:51:58,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,197 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:03,198 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-12 09:52:03,198 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:03,198 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5090 [2020-10-12 09:52:03,198 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-12 09:52:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-12 09:52:03,199 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-12 09:52:03,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:03,309 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:03,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:03,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:03,312 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:03,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:03,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:03,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:03,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:03,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:03,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:03,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:03,335 INFO L134 CoverageAnalysis]: Checked inductivity of 448 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 384 trivial. 0 not checked. [2020-10-12 09:52:03,340 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343483766] [2020-10-12 09:52:03,340 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:03,341 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-12 09:52:03,341 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366479986] [2020-10-12 09:52:03,341 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-12 09:52:03,342 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:03,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-12 09:52:03,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:03,342 INFO L87 Difference]: Start difference. First operand 145 states and 153 transitions. Second operand 12 states. [2020-10-12 09:52:03,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:03,759 INFO L93 Difference]: Finished difference Result 285 states and 306 transitions. [2020-10-12 09:52:03,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-12 09:52:03,759 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 139 [2020-10-12 09:52:03,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:03,761 INFO L225 Difference]: With dead ends: 285 [2020-10-12 09:52:03,763 INFO L226 Difference]: Without dead ends: 166 [2020-10-12 09:52:03,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-12 09:52:03,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-12 09:52:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 159. [2020-10-12 09:52:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-12 09:52:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 167 transitions. [2020-10-12 09:52:03,774 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 167 transitions. Word has length 139 [2020-10-12 09:52:03,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:03,775 INFO L479 AbstractCegarLoop]: Abstraction has 159 states and 167 transitions. [2020-10-12 09:52:03,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-12 09:52:03,775 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 167 transitions. [2020-10-12 09:52:03,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-12 09:52:03,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:03,777 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:03,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-12 09:52:03,777 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:03,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:03,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1596516736, now seen corresponding path program 9 times [2020-10-12 09:52:03,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:03,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [27444569] [2020-10-12 09:52:03,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:03,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,810 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,840 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,863 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:03,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:08,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-12 09:52:08,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:08,844 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5051 [2020-10-12 09:52:08,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-12 09:52:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:08,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-12 09:52:08,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:08,960 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:08,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:08,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:08,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:08,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:08,963 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:08,963 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:08,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:08,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:08,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:08,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:08,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:08,983 INFO L134 CoverageAnalysis]: Checked inductivity of 567 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 486 trivial. 0 not checked. [2020-10-12 09:52:08,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [27444569] [2020-10-12 09:52:08,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:08,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-12 09:52:08,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178832595] [2020-10-12 09:52:08,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-12 09:52:08,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:08,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-12 09:52:08,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:08,985 INFO L87 Difference]: Start difference. First operand 159 states and 167 transitions. Second operand 13 states. [2020-10-12 09:52:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:09,465 INFO L93 Difference]: Finished difference Result 311 states and 332 transitions. [2020-10-12 09:52:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-12 09:52:09,466 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 153 [2020-10-12 09:52:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:09,468 INFO L225 Difference]: With dead ends: 311 [2020-10-12 09:52:09,468 INFO L226 Difference]: Without dead ends: 180 [2020-10-12 09:52:09,469 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-12 09:52:09,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-12 09:52:09,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 173. [2020-10-12 09:52:09,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 173 states. [2020-10-12 09:52:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 181 transitions. [2020-10-12 09:52:09,484 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 181 transitions. Word has length 153 [2020-10-12 09:52:09,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:09,484 INFO L479 AbstractCegarLoop]: Abstraction has 173 states and 181 transitions. [2020-10-12 09:52:09,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-12 09:52:09,484 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 181 transitions. [2020-10-12 09:52:09,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-12 09:52:09,487 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:09,488 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:09,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-12 09:52:09,488 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:09,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:09,488 INFO L82 PathProgramCache]: Analyzing trace with hash 120112722, now seen corresponding path program 10 times [2020-10-12 09:52:09,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:09,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [809838023] [2020-10-12 09:52:09,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:09,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:09,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,584 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:09,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,535 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:14,536 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-12 09:52:14,536 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5025 [2020-10-12 09:52:14,536 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-12 09:52:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-12 09:52:14,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-12 09:52:14,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:14,681 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:14,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:14,684 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:14,684 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:14,684 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:14,685 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:14,685 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:14,685 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:14,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:14,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:14,685 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:14,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:14,705 INFO L134 CoverageAnalysis]: Checked inductivity of 700 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 600 trivial. 0 not checked. [2020-10-12 09:52:14,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [809838023] [2020-10-12 09:52:14,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:14,706 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-12 09:52:14,706 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141844931] [2020-10-12 09:52:14,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-12 09:52:14,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:14,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-12 09:52:14,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:14,708 INFO L87 Difference]: Start difference. First operand 173 states and 181 transitions. Second operand 14 states. [2020-10-12 09:52:15,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:15,244 INFO L93 Difference]: Finished difference Result 337 states and 358 transitions. [2020-10-12 09:52:15,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-12 09:52:15,245 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 167 [2020-10-12 09:52:15,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:15,246 INFO L225 Difference]: With dead ends: 337 [2020-10-12 09:52:15,246 INFO L226 Difference]: Without dead ends: 194 [2020-10-12 09:52:15,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-12 09:52:15,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-12 09:52:15,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 187. [2020-10-12 09:52:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-12 09:52:15,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 195 transitions. [2020-10-12 09:52:15,254 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 195 transitions. Word has length 167 [2020-10-12 09:52:15,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:15,255 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 195 transitions. [2020-10-12 09:52:15,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-12 09:52:15,255 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 195 transitions. [2020-10-12 09:52:15,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-12 09:52:15,257 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:15,257 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:15,257 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-12 09:52:15,258 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:15,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:15,258 INFO L82 PathProgramCache]: Analyzing trace with hash -330740828, now seen corresponding path program 11 times [2020-10-12 09:52:15,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:15,258 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1435614820] [2020-10-12 09:52:15,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:15,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,279 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,300 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,323 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:15,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,269 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,270 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-12 09:52:20,270 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:20,270 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5002 [2020-10-12 09:52:20,270 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-12 09:52:20,270 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 85 [2020-10-12 09:52:20,271 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-12 09:52:20,271 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:20,425 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:20,425 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:20,425 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:20,426 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:20,426 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:20,426 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:20,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:20,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:20,426 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:20,426 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:20,442 INFO L134 CoverageAnalysis]: Checked inductivity of 847 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 726 trivial. 0 not checked. [2020-10-12 09:52:20,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1435614820] [2020-10-12 09:52:20,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:20,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-12 09:52:20,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322460240] [2020-10-12 09:52:20,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-12 09:52:20,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:20,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-12 09:52:20,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:20,444 INFO L87 Difference]: Start difference. First operand 187 states and 195 transitions. Second operand 15 states. [2020-10-12 09:52:20,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:20,973 INFO L93 Difference]: Finished difference Result 363 states and 384 transitions. [2020-10-12 09:52:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-12 09:52:20,973 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 181 [2020-10-12 09:52:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:20,975 INFO L225 Difference]: With dead ends: 363 [2020-10-12 09:52:20,975 INFO L226 Difference]: Without dead ends: 208 [2020-10-12 09:52:20,976 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-12 09:52:20,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-12 09:52:20,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 201. [2020-10-12 09:52:20,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 201 states. [2020-10-12 09:52:20,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 209 transitions. [2020-10-12 09:52:20,983 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 209 transitions. Word has length 181 [2020-10-12 09:52:20,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:20,984 INFO L479 AbstractCegarLoop]: Abstraction has 201 states and 209 transitions. [2020-10-12 09:52:20,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-12 09:52:20,984 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 209 transitions. [2020-10-12 09:52:20,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-12 09:52:20,986 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:20,986 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:20,987 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-12 09:52:20,987 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:20,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:20,987 INFO L82 PathProgramCache]: Analyzing trace with hash -1861641866, now seen corresponding path program 12 times [2020-10-12 09:52:20,987 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:20,988 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [82471006] [2020-10-12 09:52:20,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:21,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,079 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:21,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,010 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:26,010 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-12 09:52:26,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:26,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-12 09:52:26,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-12 09:52:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 91 [2020-10-12 09:52:26,011 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-12 09:52:26,011 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:26,177 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:26,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:26,179 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:26,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:26,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:26,181 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:26,181 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:26,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:26,182 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:26,182 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:26,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1008 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 864 trivial. 0 not checked. [2020-10-12 09:52:26,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [82471006] [2020-10-12 09:52:26,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:26,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-12 09:52:26,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411361985] [2020-10-12 09:52:26,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-12 09:52:26,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:26,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-12 09:52:26,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:26,200 INFO L87 Difference]: Start difference. First operand 201 states and 209 transitions. Second operand 16 states. [2020-10-12 09:52:26,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:26,782 INFO L93 Difference]: Finished difference Result 389 states and 410 transitions. [2020-10-12 09:52:26,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-12 09:52:26,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 195 [2020-10-12 09:52:26,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:26,784 INFO L225 Difference]: With dead ends: 389 [2020-10-12 09:52:26,784 INFO L226 Difference]: Without dead ends: 222 [2020-10-12 09:52:26,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-12 09:52:26,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-12 09:52:26,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 215. [2020-10-12 09:52:26,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 215 states. [2020-10-12 09:52:26,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 223 transitions. [2020-10-12 09:52:26,797 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 223 transitions. Word has length 195 [2020-10-12 09:52:26,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:26,798 INFO L479 AbstractCegarLoop]: Abstraction has 215 states and 223 transitions. [2020-10-12 09:52:26,798 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-12 09:52:26,798 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 223 transitions. [2020-10-12 09:52:26,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2020-10-12 09:52:26,800 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:26,801 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:26,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-12 09:52:26,801 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:26,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:26,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1359949880, now seen corresponding path program 13 times [2020-10-12 09:52:26,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:26,802 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1113630877] [2020-10-12 09:52:26,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:26,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:26,818 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:26,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:32,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 217 [2020-10-12 09:52:32,046 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:32,046 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5231 [2020-10-12 09:52:32,046 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:32,046 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-12 09:52:32,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:32,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-12 09:52:32,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:32,231 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:32,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:32,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:32,235 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:32,235 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:32,235 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:32,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:32,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:32,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:32,236 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:32,236 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:32,254 INFO L134 CoverageAnalysis]: Checked inductivity of 1183 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 1014 trivial. 0 not checked. [2020-10-12 09:52:32,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1113630877] [2020-10-12 09:52:32,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:32,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-12 09:52:32,255 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051437377] [2020-10-12 09:52:32,255 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-12 09:52:32,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:32,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-12 09:52:32,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:32,256 INFO L87 Difference]: Start difference. First operand 215 states and 223 transitions. Second operand 17 states. [2020-10-12 09:52:32,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:32,822 INFO L93 Difference]: Finished difference Result 415 states and 436 transitions. [2020-10-12 09:52:32,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-12 09:52:32,822 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 209 [2020-10-12 09:52:32,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:32,824 INFO L225 Difference]: With dead ends: 415 [2020-10-12 09:52:32,824 INFO L226 Difference]: Without dead ends: 236 [2020-10-12 09:52:32,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-12 09:52:32,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-12 09:52:32,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2020-10-12 09:52:32,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 229 states. [2020-10-12 09:52:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 237 transitions. [2020-10-12 09:52:32,834 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 237 transitions. Word has length 209 [2020-10-12 09:52:32,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:32,835 INFO L479 AbstractCegarLoop]: Abstraction has 229 states and 237 transitions. [2020-10-12 09:52:32,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-12 09:52:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 237 transitions. [2020-10-12 09:52:32,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2020-10-12 09:52:32,837 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:32,837 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:32,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-12 09:52:32,838 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:32,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:32,838 INFO L82 PathProgramCache]: Analyzing trace with hash 1217269402, now seen corresponding path program 14 times [2020-10-12 09:52:32,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:32,839 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492428104] [2020-10-12 09:52:32,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:32,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:32,859 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,913 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:32,991 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,349 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:38,350 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 231 [2020-10-12 09:52:38,350 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:38,350 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5494 [2020-10-12 09:52:38,350 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-12 09:52:38,350 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:52:38,351 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-12 09:52:38,351 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,548 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:38,550 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:38,551 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:38,551 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:38,551 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:38,551 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:38,551 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:38,552 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:38,552 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:38,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1372 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1176 trivial. 0 not checked. [2020-10-12 09:52:38,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492428104] [2020-10-12 09:52:38,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:38,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-12 09:52:38,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830156933] [2020-10-12 09:52:38,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-12 09:52:38,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:38,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-12 09:52:38,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:38,574 INFO L87 Difference]: Start difference. First operand 229 states and 237 transitions. Second operand 18 states. [2020-10-12 09:52:39,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:39,231 INFO L93 Difference]: Finished difference Result 441 states and 462 transitions. [2020-10-12 09:52:39,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-12 09:52:39,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 223 [2020-10-12 09:52:39,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:39,234 INFO L225 Difference]: With dead ends: 441 [2020-10-12 09:52:39,235 INFO L226 Difference]: Without dead ends: 250 [2020-10-12 09:52:39,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-12 09:52:39,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-12 09:52:39,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 243. [2020-10-12 09:52:39,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 243 states. [2020-10-12 09:52:39,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 251 transitions. [2020-10-12 09:52:39,246 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 251 transitions. Word has length 223 [2020-10-12 09:52:39,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:39,246 INFO L479 AbstractCegarLoop]: Abstraction has 243 states and 251 transitions. [2020-10-12 09:52:39,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-12 09:52:39,246 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 251 transitions. [2020-10-12 09:52:39,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 238 [2020-10-12 09:52:39,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:39,248 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:39,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-12 09:52:39,248 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:39,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:39,249 INFO L82 PathProgramCache]: Analyzing trace with hash 997750252, now seen corresponding path program 15 times [2020-10-12 09:52:39,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:39,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385950536] [2020-10-12 09:52:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:39,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:39,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:39,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:39,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:39,347 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:39,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 245 [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5071 [2020-10-12 09:52:44,334 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-12 09:52:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 77 [2020-10-12 09:52:44,335 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-12 09:52:44,335 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:44,545 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:44,547 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:44,547 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:44,548 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:44,548 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:44,548 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:44,548 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:44,548 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:44,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:44,549 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:44,549 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 1350 trivial. 0 not checked. [2020-10-12 09:52:44,572 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385950536] [2020-10-12 09:52:44,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:44,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-12 09:52:44,573 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616566685] [2020-10-12 09:52:44,573 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-12 09:52:44,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:44,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-12 09:52:44,574 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:44,574 INFO L87 Difference]: Start difference. First operand 243 states and 251 transitions. Second operand 19 states. [2020-10-12 09:52:45,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:45,233 INFO L93 Difference]: Finished difference Result 467 states and 488 transitions. [2020-10-12 09:52:45,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-12 09:52:45,234 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 237 [2020-10-12 09:52:45,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:45,236 INFO L225 Difference]: With dead ends: 467 [2020-10-12 09:52:45,236 INFO L226 Difference]: Without dead ends: 264 [2020-10-12 09:52:45,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-12 09:52:45,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2020-10-12 09:52:45,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 257. [2020-10-12 09:52:45,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 257 states. [2020-10-12 09:52:45,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 265 transitions. [2020-10-12 09:52:45,248 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 265 transitions. Word has length 237 [2020-10-12 09:52:45,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:45,249 INFO L479 AbstractCegarLoop]: Abstraction has 257 states and 265 transitions. [2020-10-12 09:52:45,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-12 09:52:45,249 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 265 transitions. [2020-10-12 09:52:45,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2020-10-12 09:52:45,250 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:45,250 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:45,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-12 09:52:45,251 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:45,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:45,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1380918718, now seen corresponding path program 16 times [2020-10-12 09:52:45,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:45,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52250607] [2020-10-12 09:52:45,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:45,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:45,269 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:45,287 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:45,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:45,346 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:45,378 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:50,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 259 [2020-10-12 09:52:50,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:50,584 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5318 [2020-10-12 09:52:50,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-12 09:52:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:52:50,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-12 09:52:50,585 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:50,822 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:50,825 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:50,826 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:50,851 INFO L134 CoverageAnalysis]: Checked inductivity of 1792 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 1536 trivial. 0 not checked. [2020-10-12 09:52:50,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52250607] [2020-10-12 09:52:50,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:50,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-12 09:52:50,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880917142] [2020-10-12 09:52:50,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-12 09:52:50,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:50,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-12 09:52:50,854 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:50,854 INFO L87 Difference]: Start difference. First operand 257 states and 265 transitions. Second operand 20 states. [2020-10-12 09:52:51,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:51,587 INFO L93 Difference]: Finished difference Result 493 states and 514 transitions. [2020-10-12 09:52:51,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-12 09:52:51,588 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 251 [2020-10-12 09:52:51,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:51,590 INFO L225 Difference]: With dead ends: 493 [2020-10-12 09:52:51,590 INFO L226 Difference]: Without dead ends: 278 [2020-10-12 09:52:51,591 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-12 09:52:51,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-12 09:52:51,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 271. [2020-10-12 09:52:51,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 271 states. [2020-10-12 09:52:51,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 279 transitions. [2020-10-12 09:52:51,600 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 279 transitions. Word has length 251 [2020-10-12 09:52:51,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:51,600 INFO L479 AbstractCegarLoop]: Abstraction has 271 states and 279 transitions. [2020-10-12 09:52:51,601 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-12 09:52:51,601 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 279 transitions. [2020-10-12 09:52:51,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2020-10-12 09:52:51,602 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:51,602 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:51,602 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-12 09:52:51,602 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:51,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:51,603 INFO L82 PathProgramCache]: Analyzing trace with hash -692503024, now seen corresponding path program 17 times [2020-10-12 09:52:51,603 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:51,603 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [878023198] [2020-10-12 09:52:51,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:51,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:51,617 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:51,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:51,669 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:51,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:51,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:56,725 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:56,725 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 273 [2020-10-12 09:52:56,725 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:52:56,726 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-12 09:52:56,726 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:56,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-12 09:52:56,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 121 [2020-10-12 09:52:56,726 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-12 09:52:56,726 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:57,007 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:52:57,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:57,008 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:57,009 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:52:57,009 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:52:57,010 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:52:57,010 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:52:57,010 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:52:57,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:52:57,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:52:57,010 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:52:57,010 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:52:57,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2023 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 1734 trivial. 0 not checked. [2020-10-12 09:52:57,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [878023198] [2020-10-12 09:52:57,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:52:57,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-12 09:52:57,038 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952592368] [2020-10-12 09:52:57,039 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-12 09:52:57,039 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:52:57,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-12 09:52:57,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:57,040 INFO L87 Difference]: Start difference. First operand 271 states and 279 transitions. Second operand 21 states. [2020-10-12 09:52:57,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:52:57,866 INFO L93 Difference]: Finished difference Result 519 states and 540 transitions. [2020-10-12 09:52:57,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-12 09:52:57,867 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 265 [2020-10-12 09:52:57,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:52:57,869 INFO L225 Difference]: With dead ends: 519 [2020-10-12 09:52:57,869 INFO L226 Difference]: Without dead ends: 292 [2020-10-12 09:52:57,871 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-12 09:52:57,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 292 states. [2020-10-12 09:52:57,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 292 to 285. [2020-10-12 09:52:57,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 285 states. [2020-10-12 09:52:57,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 293 transitions. [2020-10-12 09:52:57,884 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 293 transitions. Word has length 265 [2020-10-12 09:52:57,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:52:57,884 INFO L479 AbstractCegarLoop]: Abstraction has 285 states and 293 transitions. [2020-10-12 09:52:57,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-12 09:52:57,885 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 293 transitions. [2020-10-12 09:52:57,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2020-10-12 09:52:57,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:52:57,888 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:52:57,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-12 09:52:57,888 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:52:57,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:52:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash -1553604894, now seen corresponding path program 18 times [2020-10-12 09:52:57,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:52:57,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661814130] [2020-10-12 09:52:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:52:57,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:52:57,918 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:57,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,027 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:52:58,163 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:03,223 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:03,223 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 287 [2020-10-12 09:53:03,223 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:03,223 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5310 [2020-10-12 09:53:03,223 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:03,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-12 09:53:03,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 127 [2020-10-12 09:53:03,224 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-12 09:53:03,224 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:03,514 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:03,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:03,516 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:03,517 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:03,517 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:03,518 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:03,518 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:03,518 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:03,518 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:03,549 INFO L134 CoverageAnalysis]: Checked inductivity of 2268 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1944 trivial. 0 not checked. [2020-10-12 09:53:03,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661814130] [2020-10-12 09:53:03,550 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:03,550 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-12 09:53:03,550 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440719532] [2020-10-12 09:53:03,550 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-12 09:53:03,551 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:03,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-12 09:53:03,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:03,551 INFO L87 Difference]: Start difference. First operand 285 states and 293 transitions. Second operand 22 states. [2020-10-12 09:53:04,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:04,245 INFO L93 Difference]: Finished difference Result 545 states and 566 transitions. [2020-10-12 09:53:04,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-12 09:53:04,245 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 279 [2020-10-12 09:53:04,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:04,247 INFO L225 Difference]: With dead ends: 545 [2020-10-12 09:53:04,247 INFO L226 Difference]: Without dead ends: 306 [2020-10-12 09:53:04,249 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-12 09:53:04,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-12 09:53:04,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 299. [2020-10-12 09:53:04,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 299 states. [2020-10-12 09:53:04,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 307 transitions. [2020-10-12 09:53:04,259 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 307 transitions. Word has length 279 [2020-10-12 09:53:04,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:04,259 INFO L479 AbstractCegarLoop]: Abstraction has 299 states and 307 transitions. [2020-10-12 09:53:04,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-12 09:53:04,260 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 307 transitions. [2020-10-12 09:53:04,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2020-10-12 09:53:04,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:04,262 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:04,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-12 09:53:04,262 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:04,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:04,262 INFO L82 PathProgramCache]: Analyzing trace with hash -1240717260, now seen corresponding path program 19 times [2020-10-12 09:53:04,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:04,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1065561777] [2020-10-12 09:53:04,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:04,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:04,282 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,336 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,380 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:04,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,487 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:09,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 301 [2020-10-12 09:53:09,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:09,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5209 [2020-10-12 09:53:09,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-12 09:53:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:09,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-12 09:53:09,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:09,806 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:09,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:09,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:09,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:09,809 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:09,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:09,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:09,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:09,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:09,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2527 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2166 trivial. 0 not checked. [2020-10-12 09:53:09,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1065561777] [2020-10-12 09:53:09,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:09,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-12 09:53:09,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509868380] [2020-10-12 09:53:09,844 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-12 09:53:09,844 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:09,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-12 09:53:09,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:09,845 INFO L87 Difference]: Start difference. First operand 299 states and 307 transitions. Second operand 23 states. [2020-10-12 09:53:10,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:10,608 INFO L93 Difference]: Finished difference Result 571 states and 592 transitions. [2020-10-12 09:53:10,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-12 09:53:10,609 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 293 [2020-10-12 09:53:10,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:10,610 INFO L225 Difference]: With dead ends: 571 [2020-10-12 09:53:10,611 INFO L226 Difference]: Without dead ends: 320 [2020-10-12 09:53:10,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-12 09:53:10,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2020-10-12 09:53:10,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 313. [2020-10-12 09:53:10,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 313 states. [2020-10-12 09:53:10,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 321 transitions. [2020-10-12 09:53:10,622 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 321 transitions. Word has length 293 [2020-10-12 09:53:10,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:10,623 INFO L479 AbstractCegarLoop]: Abstraction has 313 states and 321 transitions. [2020-10-12 09:53:10,623 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-12 09:53:10,623 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 321 transitions. [2020-10-12 09:53:10,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2020-10-12 09:53:10,625 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:10,625 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:10,625 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-12 09:53:10,626 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:10,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:10,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1097546246, now seen corresponding path program 20 times [2020-10-12 09:53:10,626 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:10,626 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1635402245] [2020-10-12 09:53:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:10,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:10,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:10,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:10,821 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:10,868 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:15,708 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:15,708 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 315 [2020-10-12 09:53:15,708 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:15,709 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-12 09:53:15,709 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-12 09:53:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:15,709 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-12 09:53:15,709 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:16,147 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:16,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:16,149 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:16,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:16,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:16,151 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:16,151 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:16,151 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:16,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:16,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:16,152 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:16,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-12 09:53:16,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2800 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2400 trivial. 0 not checked. [2020-10-12 09:53:16,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1635402245] [2020-10-12 09:53:16,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:16,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-12 09:53:16,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597405343] [2020-10-12 09:53:16,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-12 09:53:16,253 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:16,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-12 09:53:16,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:16,256 INFO L87 Difference]: Start difference. First operand 313 states and 321 transitions. Second operand 24 states. [2020-10-12 09:53:17,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:17,104 INFO L93 Difference]: Finished difference Result 597 states and 618 transitions. [2020-10-12 09:53:17,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-12 09:53:17,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 307 [2020-10-12 09:53:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:17,107 INFO L225 Difference]: With dead ends: 597 [2020-10-12 09:53:17,108 INFO L226 Difference]: Without dead ends: 334 [2020-10-12 09:53:17,109 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-12 09:53:17,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2020-10-12 09:53:17,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 327. [2020-10-12 09:53:17,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 327 states. [2020-10-12 09:53:17,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 327 states to 327 states and 335 transitions. [2020-10-12 09:53:17,120 INFO L78 Accepts]: Start accepts. Automaton has 327 states and 335 transitions. Word has length 307 [2020-10-12 09:53:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:17,120 INFO L479 AbstractCegarLoop]: Abstraction has 327 states and 335 transitions. [2020-10-12 09:53:17,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-12 09:53:17,121 INFO L276 IsEmpty]: Start isEmpty. Operand 327 states and 335 transitions. [2020-10-12 09:53:17,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 322 [2020-10-12 09:53:17,122 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:17,123 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:17,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-12 09:53:17,123 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:17,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:17,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1061827672, now seen corresponding path program 21 times [2020-10-12 09:53:17,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:17,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [864475208] [2020-10-12 09:53:17,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:17,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:17,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:17,160 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:17,201 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:17,248 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:17,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:22,502 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:22,503 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 329 [2020-10-12 09:53:22,503 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:22,503 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5362 [2020-10-12 09:53:22,503 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:22,503 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-12 09:53:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-12 09:53:22,504 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-12 09:53:22,504 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:22,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:22,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:22,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:22,912 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:22,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:22,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:22,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:22,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:22,912 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:22,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:22,913 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:22,974 INFO L134 CoverageAnalysis]: Checked inductivity of 3087 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2646 trivial. 0 not checked. [2020-10-12 09:53:22,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [864475208] [2020-10-12 09:53:22,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:22,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-12 09:53:22,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631894152] [2020-10-12 09:53:22,976 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-12 09:53:22,976 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:22,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-12 09:53:22,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:22,977 INFO L87 Difference]: Start difference. First operand 327 states and 335 transitions. Second operand 25 states. [2020-10-12 09:53:23,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:23,792 INFO L93 Difference]: Finished difference Result 623 states and 644 transitions. [2020-10-12 09:53:23,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-12 09:53:23,794 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 321 [2020-10-12 09:53:23,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:23,796 INFO L225 Difference]: With dead ends: 623 [2020-10-12 09:53:23,797 INFO L226 Difference]: Without dead ends: 348 [2020-10-12 09:53:23,798 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-12 09:53:23,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2020-10-12 09:53:23,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 341. [2020-10-12 09:53:23,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 341 states. [2020-10-12 09:53:23,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 349 transitions. [2020-10-12 09:53:23,811 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 349 transitions. Word has length 321 [2020-10-12 09:53:23,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:23,811 INFO L479 AbstractCegarLoop]: Abstraction has 341 states and 349 transitions. [2020-10-12 09:53:23,811 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-12 09:53:23,811 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 349 transitions. [2020-10-12 09:53:23,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2020-10-12 09:53:23,813 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:23,813 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:23,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-12 09:53:23,814 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:23,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:23,814 INFO L82 PathProgramCache]: Analyzing trace with hash -2106050774, now seen corresponding path program 22 times [2020-10-12 09:53:23,814 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:23,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10137610] [2020-10-12 09:53:23,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:23,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:23,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:23,958 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,054 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:24,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:28,999 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:29,000 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 343 [2020-10-12 09:53:29,000 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:29,000 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5156 [2020-10-12 09:53:29,000 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:29,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-12 09:53:29,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 59 [2020-10-12 09:53:29,000 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-12 09:53:29,000 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:29,403 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:29,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:29,405 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:29,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:29,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:29,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:29,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:29,407 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:29,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:29,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:29,407 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:29,407 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3388 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2904 trivial. 0 not checked. [2020-10-12 09:53:29,449 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10137610] [2020-10-12 09:53:29,449 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:29,449 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-12 09:53:29,450 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709364644] [2020-10-12 09:53:29,450 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-12 09:53:29,450 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:29,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-12 09:53:29,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:29,451 INFO L87 Difference]: Start difference. First operand 341 states and 349 transitions. Second operand 26 states. [2020-10-12 09:53:30,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:30,448 INFO L93 Difference]: Finished difference Result 649 states and 670 transitions. [2020-10-12 09:53:30,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-12 09:53:30,449 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 335 [2020-10-12 09:53:30,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:30,451 INFO L225 Difference]: With dead ends: 649 [2020-10-12 09:53:30,451 INFO L226 Difference]: Without dead ends: 362 [2020-10-12 09:53:30,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-12 09:53:30,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2020-10-12 09:53:30,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 355. [2020-10-12 09:53:30,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 355 states. [2020-10-12 09:53:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 363 transitions. [2020-10-12 09:53:30,463 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 363 transitions. Word has length 335 [2020-10-12 09:53:30,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:30,463 INFO L479 AbstractCegarLoop]: Abstraction has 355 states and 363 transitions. [2020-10-12 09:53:30,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-12 09:53:30,463 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 363 transitions. [2020-10-12 09:53:30,465 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 350 [2020-10-12 09:53:30,465 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:30,465 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:30,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-12 09:53:30,466 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:30,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:30,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1221354108, now seen corresponding path program 23 times [2020-10-12 09:53:30,466 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:30,467 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634598719] [2020-10-12 09:53:30,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:30,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:30,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,635 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:30,687 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:35,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:35,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 357 [2020-10-12 09:53:35,954 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:35,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5470 [2020-10-12 09:53:35,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:35,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-12 09:53:35,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:35,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 48 [2020-10-12 09:53:35,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:36,398 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:36,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:36,401 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:36,401 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:36,402 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:36,402 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:36,402 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:36,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:36,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:36,402 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:36,403 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3703 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 3174 trivial. 0 not checked. [2020-10-12 09:53:36,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634598719] [2020-10-12 09:53:36,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:36,470 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-12 09:53:36,470 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66400327] [2020-10-12 09:53:36,470 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-12 09:53:36,470 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-12 09:53:36,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:36,471 INFO L87 Difference]: Start difference. First operand 355 states and 363 transitions. Second operand 27 states. [2020-10-12 09:53:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:37,472 INFO L93 Difference]: Finished difference Result 675 states and 696 transitions. [2020-10-12 09:53:37,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-12 09:53:37,473 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 349 [2020-10-12 09:53:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:37,475 INFO L225 Difference]: With dead ends: 675 [2020-10-12 09:53:37,476 INFO L226 Difference]: Without dead ends: 376 [2020-10-12 09:53:37,477 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-12 09:53:37,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2020-10-12 09:53:37,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 369. [2020-10-12 09:53:37,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 369 states. [2020-10-12 09:53:37,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 377 transitions. [2020-10-12 09:53:37,486 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 377 transitions. Word has length 349 [2020-10-12 09:53:37,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:37,486 INFO L479 AbstractCegarLoop]: Abstraction has 369 states and 377 transitions. [2020-10-12 09:53:37,486 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-12 09:53:37,486 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 377 transitions. [2020-10-12 09:53:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2020-10-12 09:53:37,488 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:37,489 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:37,489 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-12 09:53:37,489 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:37,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:37,490 INFO L82 PathProgramCache]: Analyzing trace with hash 1294325326, now seen corresponding path program 24 times [2020-10-12 09:53:37,490 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:37,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318632026] [2020-10-12 09:53:37,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:37,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:37,512 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,535 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,643 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:37,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:42,901 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:42,901 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 371 [2020-10-12 09:53:42,901 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:42,902 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5393 [2020-10-12 09:53:42,902 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-12 09:53:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 163 [2020-10-12 09:53:42,902 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-10-12 09:53:42,902 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:43,395 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:43,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:43,398 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:43,400 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:43,400 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:43,400 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:43,400 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:43,400 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:43,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:43,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:43,400 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:43,401 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:43,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4032 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 3456 trivial. 0 not checked. [2020-10-12 09:53:43,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318632026] [2020-10-12 09:53:43,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:43,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-12 09:53:43,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269185315] [2020-10-12 09:53:43,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-12 09:53:43,453 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:43,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-12 09:53:43,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:43,453 INFO L87 Difference]: Start difference. First operand 369 states and 377 transitions. Second operand 28 states. [2020-10-12 09:53:44,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:44,503 INFO L93 Difference]: Finished difference Result 701 states and 722 transitions. [2020-10-12 09:53:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-12 09:53:44,503 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 363 [2020-10-12 09:53:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:44,506 INFO L225 Difference]: With dead ends: 701 [2020-10-12 09:53:44,506 INFO L226 Difference]: Without dead ends: 390 [2020-10-12 09:53:44,507 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-12 09:53:44,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2020-10-12 09:53:44,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 383. [2020-10-12 09:53:44,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 383 states. [2020-10-12 09:53:44,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 391 transitions. [2020-10-12 09:53:44,517 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 391 transitions. Word has length 363 [2020-10-12 09:53:44,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:44,517 INFO L479 AbstractCegarLoop]: Abstraction has 383 states and 391 transitions. [2020-10-12 09:53:44,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-12 09:53:44,518 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 391 transitions. [2020-10-12 09:53:44,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 378 [2020-10-12 09:53:44,520 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:44,520 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:44,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-12 09:53:44,520 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1500230304, now seen corresponding path program 25 times [2020-10-12 09:53:44,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:44,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790864002] [2020-10-12 09:53:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:44,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:44,545 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,569 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,661 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,795 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:44,908 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:50,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:50,104 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 385 [2020-10-12 09:53:50,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:50,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5565 [2020-10-12 09:53:50,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-12 09:53:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:53:50,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 52 [2020-10-12 09:53:50,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:50,626 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:50,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:50,630 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:50,630 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:50,630 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:50,630 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:50,631 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:50,631 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:50,631 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4375 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 3750 trivial. 0 not checked. [2020-10-12 09:53:50,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790864002] [2020-10-12 09:53:50,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:50,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-12 09:53:50,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472254170] [2020-10-12 09:53:50,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-12 09:53:50,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-12 09:53:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:50,687 INFO L87 Difference]: Start difference. First operand 383 states and 391 transitions. Second operand 29 states. [2020-10-12 09:53:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:51,755 INFO L93 Difference]: Finished difference Result 727 states and 748 transitions. [2020-10-12 09:53:51,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-12 09:53:51,755 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 377 [2020-10-12 09:53:51,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:51,758 INFO L225 Difference]: With dead ends: 727 [2020-10-12 09:53:51,759 INFO L226 Difference]: Without dead ends: 404 [2020-10-12 09:53:51,760 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-12 09:53:51,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2020-10-12 09:53:51,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 397. [2020-10-12 09:53:51,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 397 states. [2020-10-12 09:53:51,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 405 transitions. [2020-10-12 09:53:51,769 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 405 transitions. Word has length 377 [2020-10-12 09:53:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:51,770 INFO L479 AbstractCegarLoop]: Abstraction has 397 states and 405 transitions. [2020-10-12 09:53:51,770 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-12 09:53:51,770 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 405 transitions. [2020-10-12 09:53:51,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 392 [2020-10-12 09:53:51,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:51,773 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:51,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-12 09:53:51,773 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:51,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:51,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1485641586, now seen corresponding path program 26 times [2020-10-12 09:53:51,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:51,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067086572] [2020-10-12 09:53:51,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:51,797 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:51,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:51,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:51,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:52,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:56,997 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:56,997 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 399 [2020-10-12 09:53:56,997 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:53:56,997 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5205 [2020-10-12 09:53:56,998 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-12 09:53:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-12 09:53:56,998 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-10-12 09:53:56,998 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:57,531 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:53:57,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:57,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:57,534 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:53:57,535 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:53:57,535 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:53:57,535 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:53:57,535 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:53:57,535 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:53:57,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:53:57,536 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:53:57,536 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:53:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4732 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 4056 trivial. 0 not checked. [2020-10-12 09:53:57,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067086572] [2020-10-12 09:53:57,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:53:57,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-12 09:53:57,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011434622] [2020-10-12 09:53:57,592 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-12 09:53:57,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:53:57,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-12 09:53:57,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:57,593 INFO L87 Difference]: Start difference. First operand 397 states and 405 transitions. Second operand 30 states. [2020-10-12 09:53:58,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:53:58,637 INFO L93 Difference]: Finished difference Result 753 states and 774 transitions. [2020-10-12 09:53:58,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-12 09:53:58,639 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 391 [2020-10-12 09:53:58,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:53:58,642 INFO L225 Difference]: With dead ends: 753 [2020-10-12 09:53:58,642 INFO L226 Difference]: Without dead ends: 418 [2020-10-12 09:53:58,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-12 09:53:58,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2020-10-12 09:53:58,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 411. [2020-10-12 09:53:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 411 states. [2020-10-12 09:53:58,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 419 transitions. [2020-10-12 09:53:58,652 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 419 transitions. Word has length 391 [2020-10-12 09:53:58,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:53:58,653 INFO L479 AbstractCegarLoop]: Abstraction has 411 states and 419 transitions. [2020-10-12 09:53:58,653 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-12 09:53:58,653 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 419 transitions. [2020-10-12 09:53:58,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 406 [2020-10-12 09:53:58,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:53:58,656 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:53:58,656 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-12 09:53:58,656 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:53:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:53:58,657 INFO L82 PathProgramCache]: Analyzing trace with hash -394189628, now seen corresponding path program 27 times [2020-10-12 09:53:58,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:53:58,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898411550] [2020-10-12 09:53:58,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:53:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:53:58,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:58,705 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:58,790 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:58,865 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:53:58,934 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:03,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:03,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 413 [2020-10-12 09:54:03,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:03,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5019 [2020-10-12 09:54:03,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:03,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-12 09:54:03,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 125 [2020-10-12 09:54:03,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 56 [2020-10-12 09:54:03,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:04,269 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:04,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:04,271 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:04,272 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:04,273 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:04,273 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:04,273 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:04,273 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:04,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:04,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:04,273 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:04,273 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 5103 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 4374 trivial. 0 not checked. [2020-10-12 09:54:04,334 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898411550] [2020-10-12 09:54:04,334 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:04,334 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-12 09:54:04,334 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377038370] [2020-10-12 09:54:04,335 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-12 09:54:04,335 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:04,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-12 09:54:04,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:04,336 INFO L87 Difference]: Start difference. First operand 411 states and 419 transitions. Second operand 31 states. [2020-10-12 09:54:05,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:05,537 INFO L93 Difference]: Finished difference Result 779 states and 800 transitions. [2020-10-12 09:54:05,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-12 09:54:05,537 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 405 [2020-10-12 09:54:05,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:05,540 INFO L225 Difference]: With dead ends: 779 [2020-10-12 09:54:05,540 INFO L226 Difference]: Without dead ends: 432 [2020-10-12 09:54:05,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-12 09:54:05,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2020-10-12 09:54:05,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 425. [2020-10-12 09:54:05,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 425 states. [2020-10-12 09:54:05,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 433 transitions. [2020-10-12 09:54:05,550 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 433 transitions. Word has length 405 [2020-10-12 09:54:05,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:05,551 INFO L479 AbstractCegarLoop]: Abstraction has 425 states and 433 transitions. [2020-10-12 09:54:05,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-12 09:54:05,551 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 433 transitions. [2020-10-12 09:54:05,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2020-10-12 09:54:05,559 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:05,560 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:05,560 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-12 09:54:05,560 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:05,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1816590998, now seen corresponding path program 28 times [2020-10-12 09:54:05,561 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:05,561 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1015807544] [2020-10-12 09:54:05,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:05,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:05,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:05,650 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:05,712 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:05,774 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:11,963 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:11,963 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 427 [2020-10-12 09:54:11,964 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:11,964 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6385 [2020-10-12 09:54:11,964 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:11,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-12 09:54:11,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 129 [2020-10-12 09:54:11,964 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-10-12 09:54:11,964 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:12,573 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:12,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:12,575 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:12,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:12,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:12,576 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:12,576 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:12,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:12,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:12,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:12,577 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:12,643 INFO L134 CoverageAnalysis]: Checked inductivity of 5488 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 4704 trivial. 0 not checked. [2020-10-12 09:54:12,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1015807544] [2020-10-12 09:54:12,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:12,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-12 09:54:12,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772117283] [2020-10-12 09:54:12,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-12 09:54:12,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:12,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-12 09:54:12,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:12,645 INFO L87 Difference]: Start difference. First operand 425 states and 433 transitions. Second operand 32 states. [2020-10-12 09:54:13,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:13,820 INFO L93 Difference]: Finished difference Result 805 states and 826 transitions. [2020-10-12 09:54:13,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-12 09:54:13,821 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 419 [2020-10-12 09:54:13,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:13,824 INFO L225 Difference]: With dead ends: 805 [2020-10-12 09:54:13,827 INFO L226 Difference]: Without dead ends: 446 [2020-10-12 09:54:13,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-12 09:54:13,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 446 states. [2020-10-12 09:54:13,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 446 to 439. [2020-10-12 09:54:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 439 states. [2020-10-12 09:54:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 447 transitions. [2020-10-12 09:54:13,839 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 447 transitions. Word has length 419 [2020-10-12 09:54:13,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:13,840 INFO L479 AbstractCegarLoop]: Abstraction has 439 states and 447 transitions. [2020-10-12 09:54:13,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-12 09:54:13,840 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 447 transitions. [2020-10-12 09:54:13,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 434 [2020-10-12 09:54:13,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:13,843 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:13,844 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-12 09:54:13,844 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:13,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:13,844 INFO L82 PathProgramCache]: Analyzing trace with hash -1645889304, now seen corresponding path program 29 times [2020-10-12 09:54:13,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:13,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438115680] [2020-10-12 09:54:13,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:13,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:13,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,883 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:13,945 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:14,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:19,259 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:19,260 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 441 [2020-10-12 09:54:19,260 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:19,260 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5396 [2020-10-12 09:54:19,260 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:19,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-12 09:54:19,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 73 [2020-10-12 09:54:19,260 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 60 [2020-10-12 09:54:19,260 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:20,002 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:20,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:20,004 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:20,005 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:20,005 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:20,006 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:20,006 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:20,006 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:20,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:20,006 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:20,007 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:20,007 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 5887 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 5046 trivial. 0 not checked. [2020-10-12 09:54:20,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438115680] [2020-10-12 09:54:20,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:20,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-12 09:54:20,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966228116] [2020-10-12 09:54:20,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-12 09:54:20,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:20,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-12 09:54:20,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:20,083 INFO L87 Difference]: Start difference. First operand 439 states and 447 transitions. Second operand 33 states. [2020-10-12 09:54:21,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:21,356 INFO L93 Difference]: Finished difference Result 831 states and 852 transitions. [2020-10-12 09:54:21,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-12 09:54:21,357 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 433 [2020-10-12 09:54:21,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:21,360 INFO L225 Difference]: With dead ends: 831 [2020-10-12 09:54:21,360 INFO L226 Difference]: Without dead ends: 460 [2020-10-12 09:54:21,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-12 09:54:21,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2020-10-12 09:54:21,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 453. [2020-10-12 09:54:21,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 453 states. [2020-10-12 09:54:21,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 461 transitions. [2020-10-12 09:54:21,370 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 461 transitions. Word has length 433 [2020-10-12 09:54:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:21,371 INFO L479 AbstractCegarLoop]: Abstraction has 453 states and 461 transitions. [2020-10-12 09:54:21,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-12 09:54:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 461 transitions. [2020-10-12 09:54:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 448 [2020-10-12 09:54:21,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:21,374 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:21,374 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-12 09:54:21,375 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:21,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:21,375 INFO L82 PathProgramCache]: Analyzing trace with hash -1603502150, now seen corresponding path program 30 times [2020-10-12 09:54:21,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:21,375 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [708481965] [2020-10-12 09:54:21,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:21,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:21,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:21,638 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:27,346 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:27,346 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 455 [2020-10-12 09:54:27,346 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:27,346 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5950 [2020-10-12 09:54:27,346 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-12 09:54:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 75 [2020-10-12 09:54:27,346 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-10-12 09:54:27,347 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,023 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:28,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:28,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:28,025 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:28,026 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:28,026 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:28,026 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:28,026 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:28,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:28,026 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:28,027 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:28,027 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:28,184 INFO L134 CoverageAnalysis]: Checked inductivity of 6300 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 5400 trivial. 0 not checked. [2020-10-12 09:54:28,185 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [708481965] [2020-10-12 09:54:28,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:28,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-12 09:54:28,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635796679] [2020-10-12 09:54:28,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-12 09:54:28,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:28,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-12 09:54:28,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:28,186 INFO L87 Difference]: Start difference. First operand 453 states and 461 transitions. Second operand 34 states. [2020-10-12 09:54:29,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:29,569 INFO L93 Difference]: Finished difference Result 857 states and 878 transitions. [2020-10-12 09:54:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-12 09:54:29,569 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 447 [2020-10-12 09:54:29,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:29,572 INFO L225 Difference]: With dead ends: 857 [2020-10-12 09:54:29,572 INFO L226 Difference]: Without dead ends: 474 [2020-10-12 09:54:29,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-12 09:54:29,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 474 states. [2020-10-12 09:54:29,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 474 to 467. [2020-10-12 09:54:29,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 467 states. [2020-10-12 09:54:29,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 467 states to 467 states and 475 transitions. [2020-10-12 09:54:29,583 INFO L78 Accepts]: Start accepts. Automaton has 467 states and 475 transitions. Word has length 447 [2020-10-12 09:54:29,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:29,583 INFO L479 AbstractCegarLoop]: Abstraction has 467 states and 475 transitions. [2020-10-12 09:54:29,583 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-12 09:54:29,583 INFO L276 IsEmpty]: Start isEmpty. Operand 467 states and 475 transitions. [2020-10-12 09:54:29,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 462 [2020-10-12 09:54:29,585 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:29,586 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:29,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-12 09:54:29,586 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:29,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:29,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1846382836, now seen corresponding path program 31 times [2020-10-12 09:54:29,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:29,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171427758] [2020-10-12 09:54:29,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:29,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:29,613 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:29,634 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:29,688 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:29,777 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:29,854 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:44,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:44,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 469 [2020-10-12 09:54:44,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:44,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 14752 [2020-10-12 09:54:44,359 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:44,359 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-12 09:54:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 205 [2020-10-12 09:54:44,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 64 [2020-10-12 09:54:44,360 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:45,102 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:45,104 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:45,105 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:45,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:45,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:45,106 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:45,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:45,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:45,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:45,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:45,183 INFO L134 CoverageAnalysis]: Checked inductivity of 6727 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 5766 trivial. 0 not checked. [2020-10-12 09:54:45,184 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171427758] [2020-10-12 09:54:45,184 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:45,184 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-12 09:54:45,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424144796] [2020-10-12 09:54:45,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-12 09:54:45,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:45,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-12 09:54:45,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:45,186 INFO L87 Difference]: Start difference. First operand 467 states and 475 transitions. Second operand 35 states. [2020-10-12 09:54:46,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:46,630 INFO L93 Difference]: Finished difference Result 883 states and 904 transitions. [2020-10-12 09:54:46,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-12 09:54:46,630 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 461 [2020-10-12 09:54:46,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:46,633 INFO L225 Difference]: With dead ends: 883 [2020-10-12 09:54:46,634 INFO L226 Difference]: Without dead ends: 488 [2020-10-12 09:54:46,635 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-12 09:54:46,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2020-10-12 09:54:46,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 481. [2020-10-12 09:54:46,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 481 states. [2020-10-12 09:54:46,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 481 states to 481 states and 489 transitions. [2020-10-12 09:54:46,644 INFO L78 Accepts]: Start accepts. Automaton has 481 states and 489 transitions. Word has length 461 [2020-10-12 09:54:46,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:46,645 INFO L479 AbstractCegarLoop]: Abstraction has 481 states and 489 transitions. [2020-10-12 09:54:46,645 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-12 09:54:46,645 INFO L276 IsEmpty]: Start isEmpty. Operand 481 states and 489 transitions. [2020-10-12 09:54:46,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2020-10-12 09:54:46,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:46,648 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:46,649 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-12 09:54:46,649 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:46,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:46,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1651071266, now seen corresponding path program 32 times [2020-10-12 09:54:46,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:46,650 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101051395] [2020-10-12 09:54:46,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:46,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:46,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,701 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:46,925 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:52,870 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:52,871 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 483 [2020-10-12 09:54:52,871 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:54:52,871 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6200 [2020-10-12 09:54:52,871 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:52,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-12 09:54:52,871 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:54:52,872 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-10-12 09:54:52,872 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:53,645 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:54:53,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:53,647 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:53,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:54:53,648 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:54:53,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:54:53,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:54:53,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:54:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:54:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:54:53,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:54:53,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:54:53,729 INFO L134 CoverageAnalysis]: Checked inductivity of 7168 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 6144 trivial. 0 not checked. [2020-10-12 09:54:53,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101051395] [2020-10-12 09:54:53,730 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:54:53,730 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-12 09:54:53,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102923334] [2020-10-12 09:54:53,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-12 09:54:53,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:54:53,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-12 09:54:53,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:53,731 INFO L87 Difference]: Start difference. First operand 481 states and 489 transitions. Second operand 36 states. [2020-10-12 09:54:55,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:54:55,124 INFO L93 Difference]: Finished difference Result 909 states and 930 transitions. [2020-10-12 09:54:55,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-12 09:54:55,125 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 475 [2020-10-12 09:54:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:54:55,128 INFO L225 Difference]: With dead ends: 909 [2020-10-12 09:54:55,128 INFO L226 Difference]: Without dead ends: 502 [2020-10-12 09:54:55,129 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-12 09:54:55,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2020-10-12 09:54:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 495. [2020-10-12 09:54:55,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 495 states. [2020-10-12 09:54:55,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 503 transitions. [2020-10-12 09:54:55,139 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 503 transitions. Word has length 475 [2020-10-12 09:54:55,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:54:55,139 INFO L479 AbstractCegarLoop]: Abstraction has 495 states and 503 transitions. [2020-10-12 09:54:55,139 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-12 09:54:55,139 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 503 transitions. [2020-10-12 09:54:55,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 490 [2020-10-12 09:54:55,143 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:54:55,143 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:54:55,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-12 09:54:55,143 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:54:55,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:54:55,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1920973008, now seen corresponding path program 33 times [2020-10-12 09:54:55,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:54:55,144 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [247012608] [2020-10-12 09:54:55,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:54:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:54:55,170 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,265 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,353 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:54:55,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:02,361 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:02,361 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 497 [2020-10-12 09:55:02,361 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:02,361 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7196 [2020-10-12 09:55:02,361 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:02,361 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-12 09:55:02,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:55:02,362 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-10-12 09:55:02,362 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:03,190 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:03,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:03,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:03,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:03,193 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:03,193 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:03,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:03,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:03,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:03,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:03,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:03,279 INFO L134 CoverageAnalysis]: Checked inductivity of 7623 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 6534 trivial. 0 not checked. [2020-10-12 09:55:03,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [247012608] [2020-10-12 09:55:03,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:03,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-12 09:55:03,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488351794] [2020-10-12 09:55:03,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-12 09:55:03,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:03,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-12 09:55:03,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:55:03,282 INFO L87 Difference]: Start difference. First operand 495 states and 503 transitions. Second operand 37 states. [2020-10-12 09:55:04,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:04,867 INFO L93 Difference]: Finished difference Result 935 states and 956 transitions. [2020-10-12 09:55:04,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-12 09:55:04,867 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 489 [2020-10-12 09:55:04,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:04,870 INFO L225 Difference]: With dead ends: 935 [2020-10-12 09:55:04,870 INFO L226 Difference]: Without dead ends: 516 [2020-10-12 09:55:04,872 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-12 09:55:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 516 states. [2020-10-12 09:55:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 516 to 509. [2020-10-12 09:55:04,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 509 states. [2020-10-12 09:55:04,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 517 transitions. [2020-10-12 09:55:04,882 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 517 transitions. Word has length 489 [2020-10-12 09:55:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:04,882 INFO L479 AbstractCegarLoop]: Abstraction has 509 states and 517 transitions. [2020-10-12 09:55:04,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-12 09:55:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 517 transitions. [2020-10-12 09:55:04,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 504 [2020-10-12 09:55:04,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:04,887 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:04,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-12 09:55:04,887 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:04,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:04,888 INFO L82 PathProgramCache]: Analyzing trace with hash -589402110, now seen corresponding path program 34 times [2020-10-12 09:55:04,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:04,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1524123064] [2020-10-12 09:55:04,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:04,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:04,917 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:04,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,031 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:05,233 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:10,389 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:10,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 511 [2020-10-12 09:55:10,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-12 09:55:10,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5479 [2020-10-12 09:55:10,390 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:10,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-12 09:55:10,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-10-12 09:55:10,390 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-10-12 09:55:10,390 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:11,272 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-12 09:55:11,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:11,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:11,274 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-12 09:55:11,274 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-12 09:55:11,274 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-12 09:55:11,275 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-12 09:55:11,275 FATAL L256 erpolLogProxyWrapper]: Heuristic: BIGGEST [2020-10-12 09:55:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-12 09:55:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-12 09:55:11,275 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-12 09:55:11,275 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-12 09:55:11,366 INFO L134 CoverageAnalysis]: Checked inductivity of 8092 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 6936 trivial. 0 not checked. [2020-10-12 09:55:11,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1524123064] [2020-10-12 09:55:11,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-12 09:55:11,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-12 09:55:11,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450604012] [2020-10-12 09:55:11,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-12 09:55:11,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-12 09:55:11,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-12 09:55:11,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:55:11,369 INFO L87 Difference]: Start difference. First operand 509 states and 517 transitions. Second operand 38 states. [2020-10-12 09:55:12,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-12 09:55:12,839 INFO L93 Difference]: Finished difference Result 961 states and 982 transitions. [2020-10-12 09:55:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-12 09:55:12,839 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 503 [2020-10-12 09:55:12,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-12 09:55:12,843 INFO L225 Difference]: With dead ends: 961 [2020-10-12 09:55:12,843 INFO L226 Difference]: Without dead ends: 530 [2020-10-12 09:55:12,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-12 09:55:12,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2020-10-12 09:55:12,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 523. [2020-10-12 09:55:12,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 523 states. [2020-10-12 09:55:12,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 531 transitions. [2020-10-12 09:55:12,855 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 531 transitions. Word has length 503 [2020-10-12 09:55:12,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-12 09:55:12,855 INFO L479 AbstractCegarLoop]: Abstraction has 523 states and 531 transitions. [2020-10-12 09:55:12,856 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-12 09:55:12,856 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 531 transitions. [2020-10-12 09:55:12,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2020-10-12 09:55:12,859 INFO L414 BasicCegarLoop]: Found error trace [2020-10-12 09:55:12,860 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-12 09:55:12,860 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-12 09:55:12,860 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-12 09:55:12,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-12 09:55:12,861 INFO L82 PathProgramCache]: Analyzing trace with hash 1239957844, now seen corresponding path program 35 times [2020-10-12 09:55:12,861 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-12 09:55:12,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559157722] [2020-10-12 09:55:12,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-12 09:55:12,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-12 09:55:12,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:12,923 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:13,100 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:13,275 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-12 09:55:13,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking...