/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=NARROWEST --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-tiling/revcpyswp2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 05:26:09,777 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 05:26:09,781 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 05:26:09,832 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 05:26:09,833 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 05:26:09,842 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 05:26:09,845 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 05:26:09,849 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 05:26:09,852 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 05:26:09,855 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 05:26:09,857 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 05:26:09,858 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 05:26:09,858 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 05:26:09,861 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 05:26:09,865 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 05:26:09,866 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 05:26:09,868 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 05:26:09,870 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 05:26:09,871 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 05:26:09,881 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 05:26:09,884 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 05:26:09,885 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 05:26:09,886 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 05:26:09,887 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 05:26:09,900 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 05:26:09,901 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 05:26:09,905 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 05:26:09,906 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 05:26:09,907 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 05:26:09,908 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 05:26:09,912 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 05:26:09,913 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 05:26:09,914 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 05:26:09,915 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 05:26:09,919 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 05:26:09,919 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 05:26:09,920 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 05:26:09,920 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 05:26:09,920 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 05:26:09,922 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 05:26:09,924 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 05:26:09,925 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 [2020-10-13 05:26:09,969 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 05:26:09,969 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 05:26:09,972 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 05:26:09,972 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 05:26:09,972 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 05:26:09,973 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 05:26:09,973 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 05:26:09,973 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 05:26:09,974 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 05:26:09,974 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 05:26:09,975 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 05:26:09,975 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 05:26:09,975 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 05:26:09,976 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 05:26:09,976 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 05:26:09,976 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 05:26:09,977 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 05:26:09,977 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 05:26:09,977 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 05:26:09,977 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 05:26:09,977 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 05:26:09,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 05:26:09,978 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 05:26:09,978 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 05:26:09,978 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 05:26:09,978 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 05:26:09,978 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 05:26:09,979 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 05:26:09,979 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 05:26:09,979 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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;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=NARROWEST;log-additional-information=true;unknown-allowed=true; [2020-10-13 05:26:10,314 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 05:26:10,327 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 05:26:10,331 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 05:26:10,334 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 05:26:10,334 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 05:26:10,335 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-tiling/revcpyswp2.c [2020-10-13 05:26:10,400 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c20d1ce0f/7fb1b5ffb4db4b76b8f3f2941e5cac0d/FLAGc8c589d00 [2020-10-13 05:26:10,888 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 05:26:10,889 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-tiling/revcpyswp2.c [2020-10-13 05:26:10,900 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c20d1ce0f/7fb1b5ffb4db4b76b8f3f2941e5cac0d/FLAGc8c589d00 [2020-10-13 05:26:11,230 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/c20d1ce0f/7fb1b5ffb4db4b76b8f3f2941e5cac0d [2020-10-13 05:26:11,242 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 05:26:11,244 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 05:26:11,246 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 05:26:11,246 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 05:26:11,250 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 05:26:11,251 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,256 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@490952e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11, skipping insertion in model container [2020-10-13 05:26:11,256 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,265 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 05:26:11,286 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 05:26:11,495 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:26:11,509 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 05:26:11,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 05:26:11,655 INFO L208 MainTranslator]: Completed translation [2020-10-13 05:26:11,656 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11 WrapperNode [2020-10-13 05:26:11,656 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 05:26:11,657 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 05:26:11,657 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 05:26:11,657 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 05:26:11,675 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,676 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,688 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,689 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,718 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,728 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,730 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (1/1) ... [2020-10-13 05:26:11,733 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 05:26:11,734 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 05:26:11,734 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 05:26:11,735 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 05:26:11,736 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (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 [2020-10-13 05:26:11,816 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 05:26:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 05:26:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-10-13 05:26:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 05:26:11,817 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 05:26:11,817 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 05:26:11,818 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-10-13 05:26:11,820 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-10-13 05:26:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 05:26:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 05:26:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure malloc [2020-10-13 05:26:11,821 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 05:26:11,822 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2020-10-13 05:26:11,822 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 05:26:11,823 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 05:26:11,824 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 05:26:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 05:26:11,825 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 05:26:12,257 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 05:26:12,258 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 05:26:12,262 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:26:12 BoogieIcfgContainer [2020-10-13 05:26:12,263 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 05:26:12,264 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 05:26:12,264 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 05:26:12,267 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 05:26:12,268 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 05:26:11" (1/3) ... [2020-10-13 05:26:12,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5507a8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:26:12, skipping insertion in model container [2020-10-13 05:26:12,269 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 05:26:11" (2/3) ... [2020-10-13 05:26:12,269 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5507a8c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 05:26:12, skipping insertion in model container [2020-10-13 05:26:12,270 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 05:26:12" (3/3) ... [2020-10-13 05:26:12,272 INFO L109 eAbstractionObserver]: Analyzing ICFG revcpyswp2.c [2020-10-13 05:26:12,283 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 05:26:12,295 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 05:26:12,312 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 05:26:12,334 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 05:26:12,334 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 05:26:12,334 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 05:26:12,334 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 05:26:12,335 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 05:26:12,335 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 05:26:12,335 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 05:26:12,335 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 05:26:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states. [2020-10-13 05:26:12,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:26:12,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:12,362 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] [2020-10-13 05:26:12,362 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:12,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:12,367 INFO L82 PathProgramCache]: Analyzing trace with hash -1502106170, now seen corresponding path program 1 times [2020-10-13 05:26:12,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:12,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561171287] [2020-10-13 05:26:12,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:12,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:12,530 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:12,563 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:12,624 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:12,639 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:12,813 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:12,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 05:26:12,814 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:26:12,814 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 313 [2020-10-13 05:26:12,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:12,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:12,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 05:26:12,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:12,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 6 [2020-10-13 05:26:12,883 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:12,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:12,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:12,894 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:12,895 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:12,895 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:12,895 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 7 [2020-10-13 05:26:12,896 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:12,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:12,896 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:12,897 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:12,897 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:12,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:12,907 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561171287] [2020-10-13 05:26:12,909 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:26:12,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 05:26:12,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021081892] [2020-10-13 05:26:12,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 05:26:12,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:12,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 05:26:12,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:26:12,934 INFO L87 Difference]: Start difference. First operand 34 states. Second operand 3 states. [2020-10-13 05:26:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:13,090 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2020-10-13 05:26:13,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 05:26:13,092 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 20 [2020-10-13 05:26:13,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:13,101 INFO L225 Difference]: With dead ends: 59 [2020-10-13 05:26:13,101 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 05:26:13,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 05:26:13,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 05:26:13,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2020-10-13 05:26:13,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 05:26:13,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 05:26:13,149 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 20 [2020-10-13 05:26:13,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:13,149 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 05:26:13,149 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 05:26:13,150 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 05:26:13,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-13 05:26:13,151 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:13,151 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] [2020-10-13 05:26:13,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 05:26:13,152 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:13,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:13,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1914404788, now seen corresponding path program 1 times [2020-10-13 05:26:13,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:13,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1184050805] [2020-10-13 05:26:13,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:13,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:13,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:13,230 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:13,283 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:13,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:13,433 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:13,458 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:13,543 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:14,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:14,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-10-13 05:26:14,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:26:14,021 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 849 [2020-10-13 05:26:14,021 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:14,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:14,022 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 05:26:14,022 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:14,062 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:14,065 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:14,068 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:14,068 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:14,068 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:14,069 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:14,069 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:14,069 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:14,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:14,070 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:14,071 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:14,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:14,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1184050805] [2020-10-13 05:26:14,075 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:26:14,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 05:26:14,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230628765] [2020-10-13 05:26:14,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 05:26:14,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:14,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 05:26:14,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 05:26:14,079 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2020-10-13 05:26:14,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:14,192 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2020-10-13 05:26:14,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 05:26:14,192 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 20 [2020-10-13 05:26:14,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:14,194 INFO L225 Difference]: With dead ends: 51 [2020-10-13 05:26:14,194 INFO L226 Difference]: Without dead ends: 31 [2020-10-13 05:26:14,195 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 [2020-10-13 05:26:14,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-10-13 05:26:14,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2020-10-13 05:26:14,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2020-10-13 05:26:14,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2020-10-13 05:26:14,208 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 20 [2020-10-13 05:26:14,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:14,209 INFO L479 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2020-10-13 05:26:14,211 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 05:26:14,211 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2020-10-13 05:26:14,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 05:26:14,213 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:14,213 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] [2020-10-13 05:26:14,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 05:26:14,213 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:14,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:14,214 INFO L82 PathProgramCache]: Analyzing trace with hash 897785874, now seen corresponding path program 1 times [2020-10-13 05:26:14,214 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:14,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [6360727] [2020-10-13 05:26:14,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:14,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:14,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:14,254 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:14,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:14,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:14,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:14,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:14,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:15,697 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:15,698 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 05:26:15,698 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:26:15,698 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1463 [2020-10-13 05:26:15,699 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:15,699 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:26:15,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 20 [2020-10-13 05:26:15,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:26:15,700 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:15,763 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:15,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:15,768 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:15,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:15,773 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:15,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:15,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5 [2020-10-13 05:26:15,775 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:15,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:15,776 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:15,776 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:15,804 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:26:15,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [6360727] [2020-10-13 05:26:15,805 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 05:26:15,805 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-10-13 05:26:15,806 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919647129] [2020-10-13 05:26:15,806 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:26:15,806 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:15,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:26:15,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:26:15,807 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand 6 states. [2020-10-13 05:26:16,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:16,054 INFO L93 Difference]: Finished difference Result 63 states and 75 transitions. [2020-10-13 05:26:16,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 05:26:16,055 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 22 [2020-10-13 05:26:16,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:16,058 INFO L225 Difference]: With dead ends: 63 [2020-10-13 05:26:16,059 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 05:26:16,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-13 05:26:16,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 05:26:16,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 33. [2020-10-13 05:26:16,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-10-13 05:26:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2020-10-13 05:26:16,072 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 22 [2020-10-13 05:26:16,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:16,072 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2020-10-13 05:26:16,072 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:26:16,072 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2020-10-13 05:26:16,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-13 05:26:16,073 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:16,074 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] [2020-10-13 05:26:16,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 05:26:16,077 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:16,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:16,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1028332884, now seen corresponding path program 1 times [2020-10-13 05:26:16,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:16,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285357788] [2020-10-13 05:26:16,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:16,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:16,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:16,126 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:16,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:18,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:18,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:21,097 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:21,103 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-10-13 05:26:21,104 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:26:21,104 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:26:21,106 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:21,106 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 05:26:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:21,107 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 05:26:21,107 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:21,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:21,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:21,189 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:21,189 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:21,189 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:21,189 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:26:21,190 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:21,198 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:21,199 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 9 [2020-10-13 05:26:21,206 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 05:26:21,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285357788] [2020-10-13 05:26:21,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:21,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 05:26:21,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515319766] [2020-10-13 05:26:21,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 05:26:21,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:21,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 05:26:21,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 05:26:21,216 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand 5 states. [2020-10-13 05:26:21,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:21,410 INFO L93 Difference]: Finished difference Result 58 states and 66 transitions. [2020-10-13 05:26:21,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 05:26:21,411 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 28 [2020-10-13 05:26:21,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:21,412 INFO L225 Difference]: With dead ends: 58 [2020-10-13 05:26:21,412 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 05:26:21,413 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 [2020-10-13 05:26:21,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 05:26:21,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2020-10-13 05:26:21,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2020-10-13 05:26:21,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 39 transitions. [2020-10-13 05:26:21,433 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 39 transitions. Word has length 28 [2020-10-13 05:26:21,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:21,433 INFO L479 AbstractCegarLoop]: Abstraction has 35 states and 39 transitions. [2020-10-13 05:26:21,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 05:26:21,434 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 39 transitions. [2020-10-13 05:26:21,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2020-10-13 05:26:21,438 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:21,438 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:21,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 05:26:21,439 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:21,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1704805642, now seen corresponding path program 2 times [2020-10-13 05:26:21,440 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:21,440 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307025098] [2020-10-13 05:26:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:21,477 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:21,523 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:21,574 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:22,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:22,886 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:24,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:24,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 38 [2020-10-13 05:26:24,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 05:26:24,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3440 [2020-10-13 05:26:24,906 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 05:26:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:24,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 05:26:24,907 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:24,972 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:24,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:24,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:24,980 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:24,980 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:24,981 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:24,981 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:26:24,981 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:24,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:24,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:24,982 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:24,982 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2020-10-13 05:26:24,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307025098] [2020-10-13 05:26:24,988 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:24,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 05:26:24,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162529726] [2020-10-13 05:26:24,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 05:26:24,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:24,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 05:26:24,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-13 05:26:24,991 INFO L87 Difference]: Start difference. First operand 35 states and 39 transitions. Second operand 6 states. [2020-10-13 05:26:25,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:25,191 INFO L93 Difference]: Finished difference Result 65 states and 75 transitions. [2020-10-13 05:26:25,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 05:26:25,191 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 30 [2020-10-13 05:26:25,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:25,193 INFO L225 Difference]: With dead ends: 65 [2020-10-13 05:26:25,193 INFO L226 Difference]: Without dead ends: 46 [2020-10-13 05:26:25,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-13 05:26:25,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-10-13 05:26:25,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2020-10-13 05:26:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-13 05:26:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 45 transitions. [2020-10-13 05:26:25,201 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 45 transitions. Word has length 30 [2020-10-13 05:26:25,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:25,202 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 45 transitions. [2020-10-13 05:26:25,202 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 05:26:25,202 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 45 transitions. [2020-10-13 05:26:25,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2020-10-13 05:26:25,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:25,204 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:26:25,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 05:26:25,204 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:25,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:25,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1544999516, now seen corresponding path program 3 times [2020-10-13 05:26:25,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:25,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418171537] [2020-10-13 05:26:25,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:25,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:25,249 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:25,509 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:26,365 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:27,071 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:27,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:29,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:30,235 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:30,236 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-10-13 05:26:30,236 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:26:30,236 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:26:30,236 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:30,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:26:30,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:30,237 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 05:26:30,237 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:30,759 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 54 [2020-10-13 05:26:31,047 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2020-10-13 05:26:31,203 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2020-10-13 05:26:31,950 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:31,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:31,955 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:31,958 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:31,960 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:31,960 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:31,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:26:31,961 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:31,961 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:31,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:31,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:31,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:31,988 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:26:31,989 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418171537] [2020-10-13 05:26:31,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:31,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:26:31,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577341844] [2020-10-13 05:26:31,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:26:31,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:31,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:26:31,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:26:31,991 INFO L87 Difference]: Start difference. First operand 41 states and 45 transitions. Second operand 22 states. [2020-10-13 05:26:32,246 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 56 [2020-10-13 05:26:33,799 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 64 [2020-10-13 05:26:33,978 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 56 [2020-10-13 05:26:36,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:36,325 INFO L93 Difference]: Finished difference Result 133 states and 157 transitions. [2020-10-13 05:26:36,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 05:26:36,326 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 36 [2020-10-13 05:26:36,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:36,329 INFO L225 Difference]: With dead ends: 133 [2020-10-13 05:26:36,329 INFO L226 Difference]: Without dead ends: 131 [2020-10-13 05:26:36,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=472, Invalid=2180, Unknown=0, NotChecked=0, Total=2652 [2020-10-13 05:26:36,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-13 05:26:36,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 80. [2020-10-13 05:26:36,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 05:26:36,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 92 transitions. [2020-10-13 05:26:36,350 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 92 transitions. Word has length 36 [2020-10-13 05:26:36,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:36,350 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 92 transitions. [2020-10-13 05:26:36,350 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:26:36,351 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 92 transitions. [2020-10-13 05:26:36,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:26:36,352 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:36,352 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:36,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 05:26:36,352 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:36,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1073103234, now seen corresponding path program 4 times [2020-10-13 05:26:36,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:36,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [906432398] [2020-10-13 05:26:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:36,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:36,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:36,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:41,378 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:41,379 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:26:41,379 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:26:41,379 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5011 [2020-10-13 05:26:41,379 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:41,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:26:41,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 18 [2020-10-13 05:26:41,380 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 05:26:41,380 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:41,443 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:41,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:41,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:41,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:41,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:41,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:26:41,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:41,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:41,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:41,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:41,453 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:26:41,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [906432398] [2020-10-13 05:26:41,454 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:41,454 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:26:41,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780201180] [2020-10-13 05:26:41,455 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:26:41,455 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:41,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:26:41,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:26:41,456 INFO L87 Difference]: Start difference. First operand 80 states and 92 transitions. Second operand 10 states. [2020-10-13 05:26:41,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:41,809 INFO L93 Difference]: Finished difference Result 170 states and 196 transitions. [2020-10-13 05:26:41,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 05:26:41,810 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 05:26:41,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:41,813 INFO L225 Difference]: With dead ends: 170 [2020-10-13 05:26:41,813 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 05:26:41,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:26:41,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 05:26:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 97. [2020-10-13 05:26:41,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 05:26:41,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 106 transitions. [2020-10-13 05:26:41,834 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 106 transitions. Word has length 38 [2020-10-13 05:26:41,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:41,834 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 106 transitions. [2020-10-13 05:26:41,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:26:41,835 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 106 transitions. [2020-10-13 05:26:41,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2020-10-13 05:26:41,836 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:41,836 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:41,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 05:26:41,836 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:41,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:41,837 INFO L82 PathProgramCache]: Analyzing trace with hash -2106568190, now seen corresponding path program 5 times [2020-10-13 05:26:41,837 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:41,837 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [353231559] [2020-10-13 05:26:41,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:41,858 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:41,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:41,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:46,866 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:46,866 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 46 [2020-10-13 05:26:46,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:26:46,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:26:46,867 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:46,867 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 05:26:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:46,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 05:26:46,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:46,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:46,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:46,946 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:46,946 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:46,947 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:46,947 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 05:26:46,947 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:46,947 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:46,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:46,949 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:26:46,954 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 05:26:46,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [353231559] [2020-10-13 05:26:46,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:46,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 05:26:46,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040508556] [2020-10-13 05:26:46,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 05:26:46,956 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:46,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 05:26:46,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2020-10-13 05:26:46,957 INFO L87 Difference]: Start difference. First operand 97 states and 106 transitions. Second operand 10 states. [2020-10-13 05:26:47,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:47,471 INFO L93 Difference]: Finished difference Result 118 states and 127 transitions. [2020-10-13 05:26:47,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:26:47,473 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 38 [2020-10-13 05:26:47,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:47,475 INFO L225 Difference]: With dead ends: 118 [2020-10-13 05:26:47,475 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 05:26:47,476 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2020-10-13 05:26:47,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 05:26:47,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-13 05:26:47,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 05:26:47,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 85 transitions. [2020-10-13 05:26:47,506 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 85 transitions. Word has length 38 [2020-10-13 05:26:47,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:47,506 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 85 transitions. [2020-10-13 05:26:47,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 05:26:47,507 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 85 transitions. [2020-10-13 05:26:47,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:26:47,510 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:47,510 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:26:47,511 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 05:26:47,511 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:47,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:47,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1757695963, now seen corresponding path program 1 times [2020-10-13 05:26:47,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:47,512 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1585193107] [2020-10-13 05:26:47,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:47,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:47,568 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:47,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:47,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:48,625 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:49,044 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:49,533 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:50,511 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:51,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:51,992 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:52,554 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:52,555 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:26:52,555 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-10-13 05:26:52,555 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 05:26:52,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 05:26:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:26:52,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 05:26:52,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:54,078 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:26:54,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:54,082 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:54,083 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:54,084 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:26:54,084 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:54,084 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:26:54,084 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:26:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:54,084 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:26:54,084 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:54,085 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2020-10-13 05:26:54,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:54,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:54,091 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:26:54,092 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:26:54,092 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:26:54,092 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:26:54,092 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:26:54,092 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:26:54,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:26:54,093 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:26:54,093 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:26:54,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2020-10-13 05:26:54,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1585193107] [2020-10-13 05:26:54,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:26:54,119 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 05:26:54,119 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88984385] [2020-10-13 05:26:54,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 05:26:54,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:26:54,120 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 05:26:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2020-10-13 05:26:54,121 INFO L87 Difference]: Start difference. First operand 80 states and 85 transitions. Second operand 23 states. [2020-10-13 05:26:54,903 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 60 [2020-10-13 05:26:56,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:26:56,443 INFO L93 Difference]: Finished difference Result 91 states and 97 transitions. [2020-10-13 05:26:56,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 05:26:56,443 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 44 [2020-10-13 05:26:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:26:56,444 INFO L225 Difference]: With dead ends: 91 [2020-10-13 05:26:56,444 INFO L226 Difference]: Without dead ends: 58 [2020-10-13 05:26:56,448 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=306, Invalid=1416, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 05:26:56,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-13 05:26:56,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 49. [2020-10-13 05:26:56,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-13 05:26:56,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2020-10-13 05:26:56,463 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 44 [2020-10-13 05:26:56,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:26:56,468 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2020-10-13 05:26:56,468 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 05:26:56,468 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2020-10-13 05:26:56,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-10-13 05:26:56,469 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:26:56,469 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:26:56,469 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 05:26:56,469 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:26:56,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:26:56,470 INFO L82 PathProgramCache]: Analyzing trace with hash -1717542756, now seen corresponding path program 6 times [2020-10-13 05:26:56,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:26:56,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017986667] [2020-10-13 05:26:56,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:26:56,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:26:56,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:57,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:58,940 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:26:59,749 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:00,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:00,439 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:00,871 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:01,541 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-10-13 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:01,542 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 05:27:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:01,543 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 05:27:01,543 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:03,651 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:03,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:03,654 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:03,656 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:03,656 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:03,657 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:03,657 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:03,657 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:03,657 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:03,658 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:03,658 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:03,700 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 2 proven. 25 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2020-10-13 05:27:03,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017986667] [2020-10-13 05:27:03,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:03,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 05:27:03,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761371980] [2020-10-13 05:27:03,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 05:27:03,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:03,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 05:27:03,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:27:03,705 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand 26 states. [2020-10-13 05:27:04,012 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 59 [2020-10-13 05:27:04,483 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 73 [2020-10-13 05:27:04,766 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 49 [2020-10-13 05:27:05,412 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 62 [2020-10-13 05:27:05,699 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 83 [2020-10-13 05:27:06,067 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 77 [2020-10-13 05:27:06,481 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 75 [2020-10-13 05:27:06,833 WARN L193 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 66 [2020-10-13 05:27:07,062 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 73 [2020-10-13 05:27:07,433 WARN L193 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 74 [2020-10-13 05:27:07,667 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 69 [2020-10-13 05:27:07,912 WARN L193 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 59 [2020-10-13 05:27:08,237 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 70 [2020-10-13 05:27:08,644 WARN L193 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 114 DAG size of output: 69 [2020-10-13 05:27:08,992 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 76 [2020-10-13 05:27:09,372 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 64 [2020-10-13 05:27:09,533 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-10-13 05:27:09,911 WARN L193 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 84 [2020-10-13 05:27:10,240 WARN L193 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 77 [2020-10-13 05:27:10,463 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 66 [2020-10-13 05:27:10,686 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 63 [2020-10-13 05:27:11,023 WARN L193 SmtUtils]: Spent 248.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 73 [2020-10-13 05:27:11,603 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 59 [2020-10-13 05:27:12,135 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 59 [2020-10-13 05:27:12,341 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 58 [2020-10-13 05:27:12,568 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 56 [2020-10-13 05:27:12,815 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 70 [2020-10-13 05:27:13,055 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 69 [2020-10-13 05:27:13,377 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 72 [2020-10-13 05:27:13,627 WARN L193 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 69 [2020-10-13 05:27:14,019 WARN L193 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 76 [2020-10-13 05:27:14,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:14,129 INFO L93 Difference]: Finished difference Result 127 states and 144 transitions. [2020-10-13 05:27:14,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2020-10-13 05:27:14,130 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 44 [2020-10-13 05:27:14,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:14,131 INFO L225 Difference]: With dead ends: 127 [2020-10-13 05:27:14,131 INFO L226 Difference]: Without dead ends: 125 [2020-10-13 05:27:14,137 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=1121, Invalid=4885, Unknown=0, NotChecked=0, Total=6006 [2020-10-13 05:27:14,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-13 05:27:14,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 74. [2020-10-13 05:27:14,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-13 05:27:14,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 81 transitions. [2020-10-13 05:27:14,167 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 81 transitions. Word has length 44 [2020-10-13 05:27:14,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:14,168 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 81 transitions. [2020-10-13 05:27:14,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 05:27:14,168 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 81 transitions. [2020-10-13 05:27:14,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2020-10-13 05:27:14,175 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:14,175 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:14,175 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 05:27:14,175 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:14,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:14,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1941895494, now seen corresponding path program 7 times [2020-10-13 05:27:14,176 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:14,179 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755013928] [2020-10-13 05:27:14,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:14,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:14,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:14,226 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:14,486 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:19,205 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:19,205 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 54 [2020-10-13 05:27:19,205 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:27:19,205 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 05:27:19,205 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:27:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:19,206 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 05:27:19,206 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:19,293 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:19,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:19,296 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:19,298 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:19,298 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:19,299 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:19,299 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:19,299 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:19,299 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:19,300 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:19,300 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:19,302 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 05:27:19,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755013928] [2020-10-13 05:27:19,303 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:19,303 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:27:19,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120362693] [2020-10-13 05:27:19,304 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:27:19,304 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:19,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:27:19,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:27:19,305 INFO L87 Difference]: Start difference. First operand 74 states and 81 transitions. Second operand 12 states. [2020-10-13 05:27:19,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:19,811 INFO L93 Difference]: Finished difference Result 182 states and 205 transitions. [2020-10-13 05:27:19,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 05:27:19,812 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 46 [2020-10-13 05:27:19,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:19,814 INFO L225 Difference]: With dead ends: 182 [2020-10-13 05:27:19,814 INFO L226 Difference]: Without dead ends: 133 [2020-10-13 05:27:19,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-13 05:27:19,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-13 05:27:19,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 111. [2020-10-13 05:27:19,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-13 05:27:19,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 121 transitions. [2020-10-13 05:27:19,840 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 121 transitions. Word has length 46 [2020-10-13 05:27:19,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:19,840 INFO L479 AbstractCegarLoop]: Abstraction has 111 states and 121 transitions. [2020-10-13 05:27:19,840 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:27:19,840 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 121 transitions. [2020-10-13 05:27:19,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2020-10-13 05:27:19,841 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:19,841 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:19,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 05:27:19,842 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:19,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:19,842 INFO L82 PathProgramCache]: Analyzing trace with hash 52743576, now seen corresponding path program 8 times [2020-10-13 05:27:19,842 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:19,843 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1729270662] [2020-10-13 05:27:19,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:19,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:19,867 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:19,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:20,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:20,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:24,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:24,868 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-10-13 05:27:24,868 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:27:24,868 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5010 [2020-10-13 05:27:24,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 05:27:24,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 05:27:24,869 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 05:27:24,869 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:24,958 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:24,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:24,961 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:24,962 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:24,962 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:24,962 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:24,962 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:27:24,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:24,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:24,963 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:24,965 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2020-10-13 05:27:24,966 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1729270662] [2020-10-13 05:27:24,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:24,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 05:27:24,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903955297] [2020-10-13 05:27:24,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 05:27:24,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:24,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 05:27:24,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-13 05:27:24,968 INFO L87 Difference]: Start difference. First operand 111 states and 121 transitions. Second operand 12 states. [2020-10-13 05:27:25,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:25,694 INFO L93 Difference]: Finished difference Result 163 states and 175 transitions. [2020-10-13 05:27:25,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 05:27:25,695 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 48 [2020-10-13 05:27:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:25,696 INFO L225 Difference]: With dead ends: 163 [2020-10-13 05:27:25,696 INFO L226 Difference]: Without dead ends: 115 [2020-10-13 05:27:25,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=349, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:27:25,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-13 05:27:25,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 100. [2020-10-13 05:27:25,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-13 05:27:25,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 106 transitions. [2020-10-13 05:27:25,715 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 106 transitions. Word has length 48 [2020-10-13 05:27:25,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:25,715 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 106 transitions. [2020-10-13 05:27:25,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 05:27:25,715 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 106 transitions. [2020-10-13 05:27:25,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:27:25,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:25,716 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:27:25,717 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 05:27:25,717 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:25,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:25,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1217066285, now seen corresponding path program 2 times [2020-10-13 05:27:25,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:25,718 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734860852] [2020-10-13 05:27:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:25,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:25,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:26,069 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:26,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:27,343 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:28,337 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:29,018 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:30,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:30,784 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:30,785 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:27:30,785 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-10-13 05:27:30,786 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 05:27:30,786 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:30,786 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:27:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:30,787 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 05:27:30,787 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:27:32,240 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 48 [2020-10-13 05:27:32,749 WARN L193 SmtUtils]: Spent 300.00 ms on a formula simplification. DAG size of input: 163 DAG size of output: 50 [2020-10-13 05:27:33,140 WARN L193 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 61 [2020-10-13 05:27:33,458 WARN L193 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 138 DAG size of output: 74 [2020-10-13 05:27:33,706 WARN L193 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 134 DAG size of output: 60 [2020-10-13 05:27:34,013 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 62 [2020-10-13 05:27:34,486 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 167 DAG size of output: 63 [2020-10-13 05:27:34,882 WARN L193 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 152 DAG size of output: 58 [2020-10-13 05:27:35,054 WARN L193 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 80 DAG size of output: 53 [2020-10-13 05:27:35,743 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:35,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:35,748 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:35,750 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:35,750 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:35,750 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:35,750 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:27:35,751 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:35,751 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:35,751 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:35,753 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 05:27:35,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:35,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:35,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:35,759 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:27:35,759 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:35,759 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:27:35,759 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:27:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:35,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:27:35,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 34 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 05:27:35,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734860852] [2020-10-13 05:27:35,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:35,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 05:27:35,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046262355] [2020-10-13 05:27:35,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 05:27:35,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:35,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 05:27:35,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=794, Unknown=0, NotChecked=0, Total=870 [2020-10-13 05:27:35,786 INFO L87 Difference]: Start difference. First operand 100 states and 106 transitions. Second operand 30 states. [2020-10-13 05:27:36,543 WARN L193 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 75 [2020-10-13 05:27:37,252 WARN L193 SmtUtils]: Spent 296.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 81 [2020-10-13 05:27:38,285 WARN L193 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 87 [2020-10-13 05:27:38,926 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 56 [2020-10-13 05:27:39,173 WARN L193 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 110 DAG size of output: 67 [2020-10-13 05:27:39,545 WARN L193 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 142 DAG size of output: 60 [2020-10-13 05:27:40,309 WARN L193 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 81 [2020-10-13 05:27:40,559 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 59 [2020-10-13 05:27:40,834 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 60 [2020-10-13 05:27:41,097 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 117 DAG size of output: 70 [2020-10-13 05:27:41,366 WARN L193 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 76 [2020-10-13 05:27:41,619 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 69 [2020-10-13 05:27:41,865 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 70 [2020-10-13 05:27:42,363 WARN L193 SmtUtils]: Spent 335.00 ms on a formula simplification. DAG size of input: 155 DAG size of output: 73 [2020-10-13 05:27:42,587 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 35 [2020-10-13 05:27:42,991 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 43 [2020-10-13 05:27:43,234 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 123 DAG size of output: 46 [2020-10-13 05:27:44,032 WARN L193 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 75 [2020-10-13 05:27:44,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:27:44,102 INFO L93 Difference]: Finished difference Result 107 states and 112 transitions. [2020-10-13 05:27:44,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 05:27:44,103 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 52 [2020-10-13 05:27:44,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:27:44,104 INFO L225 Difference]: With dead ends: 107 [2020-10-13 05:27:44,105 INFO L226 Difference]: Without dead ends: 103 [2020-10-13 05:27:44,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=554, Invalid=3478, Unknown=0, NotChecked=0, Total=4032 [2020-10-13 05:27:44,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-13 05:27:44,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2020-10-13 05:27:44,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 05:27:44,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 107 transitions. [2020-10-13 05:27:44,126 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 107 transitions. Word has length 52 [2020-10-13 05:27:44,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:27:44,126 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 107 transitions. [2020-10-13 05:27:44,126 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 05:27:44,127 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 107 transitions. [2020-10-13 05:27:44,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 05:27:44,127 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:27:44,127 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:27:44,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 05:27:44,128 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:27:44,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:27:44,128 INFO L82 PathProgramCache]: Analyzing trace with hash 834829204, now seen corresponding path program 9 times [2020-10-13 05:27:44,129 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:27:44,129 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693853608] [2020-10-13 05:27:44,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:27:44,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:44,247 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:46,466 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:48,976 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:49,837 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:49,838 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 05:27:49,838 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:27:49,838 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5650 [2020-10-13 05:27:49,838 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:49,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 05:27:49,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:27:49,839 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 47 [2020-10-13 05:27:49,839 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:50,607 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 67 [2020-10-13 05:27:50,942 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 51 [2020-10-13 05:27:51,117 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 50 [2020-10-13 05:27:51,378 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 48 [2020-10-13 05:27:51,677 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 52 [2020-10-13 05:27:52,153 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 51 [2020-10-13 05:27:52,698 WARN L193 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 53 [2020-10-13 05:27:52,967 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 74 DAG size of output: 52 [2020-10-13 05:27:53,561 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:27:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:27:53,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:27:53,566 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:27:53,566 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:27:53,566 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:27:53,566 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:27:53,566 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:27:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:27:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:27:53,567 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:27:53,567 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:27:53,595 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 3 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:27:53,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693853608] [2020-10-13 05:27:53,595 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:27:53,595 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 05:27:53,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517645882] [2020-10-13 05:27:53,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 05:27:53,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:27:53,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 05:27:53,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2020-10-13 05:27:53,597 INFO L87 Difference]: Start difference. First operand 102 states and 107 transitions. Second operand 31 states. [2020-10-13 05:27:54,565 WARN L193 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 65 [2020-10-13 05:27:54,742 WARN L193 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 51 [2020-10-13 05:27:55,625 WARN L193 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 50 [2020-10-13 05:27:55,887 WARN L193 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 66 [2020-10-13 05:27:56,169 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 144 DAG size of output: 68 [2020-10-13 05:27:56,472 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 67 [2020-10-13 05:27:56,810 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 162 DAG size of output: 82 [2020-10-13 05:27:56,972 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 52 [2020-10-13 05:27:57,172 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 56 [2020-10-13 05:27:57,490 WARN L193 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 150 DAG size of output: 65 [2020-10-13 05:27:57,725 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 60 [2020-10-13 05:27:58,020 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 153 DAG size of output: 64 [2020-10-13 05:27:58,246 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 61 [2020-10-13 05:27:58,561 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 61 [2020-10-13 05:27:58,828 WARN L193 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 136 DAG size of output: 64 [2020-10-13 05:27:59,248 WARN L193 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 156 DAG size of output: 66 [2020-10-13 05:27:59,586 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 54 [2020-10-13 05:27:59,788 WARN L193 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 53 [2020-10-13 05:28:00,402 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2020-10-13 05:28:00,943 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 61 [2020-10-13 05:28:01,949 WARN L193 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 46 [2020-10-13 05:28:02,260 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 47 [2020-10-13 05:28:02,666 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 47 [2020-10-13 05:28:03,067 WARN L193 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 127 DAG size of output: 50 [2020-10-13 05:28:03,498 WARN L193 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 147 DAG size of output: 56 [2020-10-13 05:28:05,752 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 44 [2020-10-13 05:28:06,030 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 137 DAG size of output: 44 [2020-10-13 05:28:06,471 WARN L193 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 149 DAG size of output: 45 [2020-10-13 05:28:06,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:06,612 INFO L93 Difference]: Finished difference Result 190 states and 208 transitions. [2020-10-13 05:28:06,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2020-10-13 05:28:06,613 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 52 [2020-10-13 05:28:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:06,615 INFO L225 Difference]: With dead ends: 190 [2020-10-13 05:28:06,615 INFO L226 Difference]: Without dead ends: 188 [2020-10-13 05:28:06,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 8 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 13.7s TimeCoverageRelationStatistics Valid=1541, Invalid=6649, Unknown=0, NotChecked=0, Total=8190 [2020-10-13 05:28:06,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2020-10-13 05:28:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 141. [2020-10-13 05:28:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-13 05:28:06,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 150 transitions. [2020-10-13 05:28:06,644 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 150 transitions. Word has length 52 [2020-10-13 05:28:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:06,644 INFO L479 AbstractCegarLoop]: Abstraction has 141 states and 150 transitions. [2020-10-13 05:28:06,644 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 05:28:06,644 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 150 transitions. [2020-10-13 05:28:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:28:06,645 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:06,645 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 05:28:06,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 05:28:06,646 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:06,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:06,646 INFO L82 PathProgramCache]: Analyzing trace with hash 1951511410, now seen corresponding path program 10 times [2020-10-13 05:28:06,646 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:06,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072347414] [2020-10-13 05:28:06,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:06,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:06,672 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:07,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:11,677 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:11,677 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:28:11,677 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:28:11,677 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:28:11,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 05:28:11,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:11,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-10-13 05:28:11,678 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:12,668 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 54 [2020-10-13 05:28:12,872 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 42 [2020-10-13 05:28:13,067 WARN L193 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 43 [2020-10-13 05:28:13,253 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 47 [2020-10-13 05:28:13,438 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 46 [2020-10-13 05:28:13,580 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2020-10-13 05:28:13,797 WARN L193 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 43 [2020-10-13 05:28:13,999 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 38 [2020-10-13 05:28:14,330 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 140 DAG size of output: 45 [2020-10-13 05:28:15,045 WARN L193 SmtUtils]: Spent 401.00 ms on a formula simplification. DAG size of input: 146 DAG size of output: 53 [2020-10-13 05:28:15,697 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 133 DAG size of output: 56 [2020-10-13 05:28:15,943 WARN L193 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 48 [2020-10-13 05:28:16,267 WARN L193 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 55 [2020-10-13 05:28:16,566 WARN L193 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 45 [2020-10-13 05:28:16,791 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 40 [2020-10-13 05:28:17,089 WARN L193 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 49 [2020-10-13 05:28:17,396 WARN L193 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 44 [2020-10-13 05:28:17,735 WARN L193 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 113 DAG size of output: 47 [2020-10-13 05:28:18,016 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 41 [2020-10-13 05:28:18,863 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:18,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:18,869 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:18,869 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:18,870 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:18,870 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:18,870 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:18,870 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:18,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:18,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:18,870 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:18,870 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:18,898 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 5 proven. 68 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:28:18,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072347414] [2020-10-13 05:28:18,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:18,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 05:28:18,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335166346] [2020-10-13 05:28:18,899 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 05:28:18,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:18,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 05:28:18,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1229, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:28:18,900 INFO L87 Difference]: Start difference. First operand 141 states and 150 transitions. Second operand 37 states. [2020-10-13 05:28:19,750 WARN L193 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 79 [2020-10-13 05:28:20,801 WARN L193 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 81 [2020-10-13 05:28:21,168 WARN L193 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2020-10-13 05:28:21,543 WARN L193 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 82 [2020-10-13 05:28:21,927 WARN L193 SmtUtils]: Spent 246.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 76 [2020-10-13 05:28:22,387 WARN L193 SmtUtils]: Spent 295.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 85 [2020-10-13 05:28:23,176 WARN L193 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 100 DAG size of output: 78 [2020-10-13 05:28:23,383 WARN L193 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 49 [2020-10-13 05:28:23,736 WARN L193 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 75 [2020-10-13 05:28:24,172 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 51 [2020-10-13 05:28:24,408 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 52 [2020-10-13 05:28:25,105 WARN L193 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 139 DAG size of output: 90 [2020-10-13 05:28:25,429 WARN L193 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 60 [2020-10-13 05:28:25,703 WARN L193 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 56 [2020-10-13 05:28:25,982 WARN L193 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 57 [2020-10-13 05:28:26,245 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 52 [2020-10-13 05:28:26,555 WARN L193 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 65 [2020-10-13 05:28:27,126 WARN L193 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 120 DAG size of output: 66 [2020-10-13 05:28:27,495 WARN L193 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 118 DAG size of output: 65 [2020-10-13 05:28:27,712 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 49 [2020-10-13 05:28:28,256 WARN L193 SmtUtils]: Spent 420.00 ms on a formula simplification. DAG size of input: 145 DAG size of output: 95 [2020-10-13 05:28:28,499 WARN L193 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 48 [2020-10-13 05:28:28,970 WARN L193 SmtUtils]: Spent 302.00 ms on a formula simplification. DAG size of input: 111 DAG size of output: 81 [2020-10-13 05:28:29,292 WARN L193 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 112 DAG size of output: 59 [2020-10-13 05:28:29,692 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-13 05:28:30,051 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 64 [2020-10-13 05:28:30,356 WARN L193 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 60 [2020-10-13 05:28:30,696 WARN L193 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 59 [2020-10-13 05:28:31,718 WARN L193 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 52 [2020-10-13 05:28:32,176 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 50 [2020-10-13 05:28:32,443 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 45 [2020-10-13 05:28:33,335 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 66 [2020-10-13 05:28:33,638 WARN L193 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 83 DAG size of output: 67 [2020-10-13 05:28:34,300 WARN L193 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 56 [2020-10-13 05:28:34,549 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 57 [2020-10-13 05:28:35,148 WARN L193 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 55 [2020-10-13 05:28:35,560 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 54 [2020-10-13 05:28:36,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:36,597 INFO L93 Difference]: Finished difference Result 238 states and 267 transitions. [2020-10-13 05:28:36,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2020-10-13 05:28:36,598 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 54 [2020-10-13 05:28:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:36,601 INFO L225 Difference]: With dead ends: 238 [2020-10-13 05:28:36,602 INFO L226 Difference]: Without dead ends: 236 [2020-10-13 05:28:36,606 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 4 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2716 ImplicationChecksByTransitivity, 20.5s TimeCoverageRelationStatistics Valid=1486, Invalid=9020, Unknown=0, NotChecked=0, Total=10506 [2020-10-13 05:28:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2020-10-13 05:28:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 153. [2020-10-13 05:28:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-13 05:28:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 164 transitions. [2020-10-13 05:28:36,639 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 164 transitions. Word has length 54 [2020-10-13 05:28:36,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:36,639 INFO L479 AbstractCegarLoop]: Abstraction has 153 states and 164 transitions. [2020-10-13 05:28:36,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 05:28:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 164 transitions. [2020-10-13 05:28:36,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2020-10-13 05:28:36,640 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:36,640 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 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] [2020-10-13 05:28:36,641 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 05:28:36,641 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1545526286, now seen corresponding path program 11 times [2020-10-13 05:28:36,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:36,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572188652] [2020-10-13 05:28:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:36,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:36,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:36,848 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:37,375 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:41,688 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:41,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-10-13 05:28:41,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 05:28:41,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5029 [2020-10-13 05:28:41,689 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:41,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:28:41,689 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:41,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 05:28:41,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:41,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:41,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:41,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:41,883 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:41,883 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:41,884 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:41,884 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:41,884 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:41,884 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:41,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:41,885 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:41,885 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:41,892 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 05:28:41,893 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572188652] [2020-10-13 05:28:41,893 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:41,893 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:28:41,893 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192578938] [2020-10-13 05:28:41,894 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:28:41,894 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:41,894 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:28:41,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:28:41,895 INFO L87 Difference]: Start difference. First operand 153 states and 164 transitions. Second operand 14 states. [2020-10-13 05:28:43,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:43,360 INFO L93 Difference]: Finished difference Result 266 states and 292 transitions. [2020-10-13 05:28:43,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:28:43,362 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 54 [2020-10-13 05:28:43,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:43,364 INFO L225 Difference]: With dead ends: 266 [2020-10-13 05:28:43,364 INFO L226 Difference]: Without dead ends: 218 [2020-10-13 05:28:43,366 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=155, Invalid=495, Unknown=0, NotChecked=0, Total=650 [2020-10-13 05:28:43,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-13 05:28:43,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 147. [2020-10-13 05:28:43,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 05:28:43,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 156 transitions. [2020-10-13 05:28:43,418 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 156 transitions. Word has length 54 [2020-10-13 05:28:43,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:43,418 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 156 transitions. [2020-10-13 05:28:43,418 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:28:43,418 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 156 transitions. [2020-10-13 05:28:43,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2020-10-13 05:28:43,419 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:43,419 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:43,419 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 05:28:43,419 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:43,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:43,420 INFO L82 PathProgramCache]: Analyzing trace with hash -1590314096, now seen corresponding path program 12 times [2020-10-13 05:28:43,420 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:43,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1329550720] [2020-10-13 05:28:43,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:43,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:43,441 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:43,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:43,847 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:44,407 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:48,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:48,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-10-13 05:28:48,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:28:48,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5015 [2020-10-13 05:28:48,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:48,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 05:28:48,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 22 [2020-10-13 05:28:48,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 05:28:48,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:48,609 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:48,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:48,612 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:48,614 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:48,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:48,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:48,615 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:48,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:48,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:48,617 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:48,617 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 05:28:48,624 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 41 trivial. 0 not checked. [2020-10-13 05:28:48,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1329550720] [2020-10-13 05:28:48,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:48,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 05:28:48,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606750311] [2020-10-13 05:28:48,628 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 05:28:48,628 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:48,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 05:28:48,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-13 05:28:48,629 INFO L87 Difference]: Start difference. First operand 147 states and 156 transitions. Second operand 14 states. [2020-10-13 05:28:49,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:49,881 INFO L93 Difference]: Finished difference Result 238 states and 258 transitions. [2020-10-13 05:28:49,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 05:28:49,883 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 56 [2020-10-13 05:28:49,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:49,884 INFO L225 Difference]: With dead ends: 238 [2020-10-13 05:28:49,885 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 05:28:49,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2020-10-13 05:28:49,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 05:28:49,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 163. [2020-10-13 05:28:49,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-13 05:28:49,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 171 transitions. [2020-10-13 05:28:49,920 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 171 transitions. Word has length 56 [2020-10-13 05:28:49,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:49,921 INFO L479 AbstractCegarLoop]: Abstraction has 163 states and 171 transitions. [2020-10-13 05:28:49,921 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 05:28:49,921 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 171 transitions. [2020-10-13 05:28:49,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:28:49,922 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:49,922 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:49,922 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 05:28:49,922 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:49,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:49,923 INFO L82 PathProgramCache]: Analyzing trace with hash 229871114, now seen corresponding path program 3 times [2020-10-13 05:28:49,923 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:49,923 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [879520659] [2020-10-13 05:28:49,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:49,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:49,959 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:50,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:50,621 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:50,872 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:51,438 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:54,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:54,947 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:54,948 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-10-13 05:28:54,948 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 6 [2020-10-13 05:28:54,948 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 05:28:54,948 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:54,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 05:28:54,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:28:54,948 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-10-13 05:28:54,948 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:56,587 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:28:56,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:56,589 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:56,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:56,591 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:28:56,591 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:56,591 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 05:28:56,591 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:28:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:56,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:28:56,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:56,593 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2020-10-13 05:28:56,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:56,595 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:56,596 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:56,597 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:56,597 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:56,597 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:56,597 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:56,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:56,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:56,597 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:56,598 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:56,599 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 05:28:56,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:56,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:56,602 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:28:56,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:28:56,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:28:56,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:28:56,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:28:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:28:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:28:56,603 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:28:56,603 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:28:56,620 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 35 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2020-10-13 05:28:56,620 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [879520659] [2020-10-13 05:28:56,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:28:56,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 05:28:56,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357043843] [2020-10-13 05:28:56,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 05:28:56,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:28:56,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 05:28:56,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2020-10-13 05:28:56,622 INFO L87 Difference]: Start difference. First operand 163 states and 171 transitions. Second operand 22 states. [2020-10-13 05:28:58,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:28:58,857 INFO L93 Difference]: Finished difference Result 177 states and 187 transitions. [2020-10-13 05:28:58,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 05:28:58,860 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 60 [2020-10-13 05:28:58,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:28:58,861 INFO L225 Difference]: With dead ends: 177 [2020-10-13 05:28:58,861 INFO L226 Difference]: Without dead ends: 130 [2020-10-13 05:28:58,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=159, Invalid=1173, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 05:28:58,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-13 05:28:58,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 118. [2020-10-13 05:28:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 05:28:58,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 125 transitions. [2020-10-13 05:28:58,895 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 125 transitions. Word has length 60 [2020-10-13 05:28:58,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:28:58,895 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 125 transitions. [2020-10-13 05:28:58,895 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 05:28:58,895 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 125 transitions. [2020-10-13 05:28:58,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:28:58,896 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:28:58,896 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 05:28:58,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 05:28:58,896 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:28:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:28:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash -1557615157, now seen corresponding path program 4 times [2020-10-13 05:28:58,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:28:58,897 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1230710007] [2020-10-13 05:28:58,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:28:58,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:28:58,956 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:28:59,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:01,175 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:03,648 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:04,497 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:04,497 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 05:29:04,497 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 05:29:04,498 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5563 [2020-10-13 05:29:04,498 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 05:29:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:04,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-10-13 05:29:04,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:05,221 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2020-10-13 05:29:05,379 WARN L193 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 45 [2020-10-13 05:29:05,794 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2020-10-13 05:29:06,691 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:06,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:06,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:06,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:06,696 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:06,696 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:06,696 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 05:29:06,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:06,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:06,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:06,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:06,697 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:06,698 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2020-10-13 05:29:06,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:06,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:06,705 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:06,705 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 9 [2020-10-13 05:29:06,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:06,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:06,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 05:29:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:06,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 05:29:06,706 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 2 proven. 44 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2020-10-13 05:29:06,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1230710007] [2020-10-13 05:29:06,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:06,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 05:29:06,730 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646004666] [2020-10-13 05:29:06,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 05:29:06,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:06,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 05:29:06,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2020-10-13 05:29:06,731 INFO L87 Difference]: Start difference. First operand 118 states and 125 transitions. Second operand 25 states. [2020-10-13 05:29:07,302 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 43 [2020-10-13 05:29:07,685 WARN L193 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-13 05:29:08,014 WARN L193 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 52 [2020-10-13 05:29:09,021 WARN L193 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 58 [2020-10-13 05:29:10,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 05:29:10,855 INFO L93 Difference]: Finished difference Result 141 states and 151 transitions. [2020-10-13 05:29:10,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 05:29:10,857 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 60 [2020-10-13 05:29:10,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 05:29:10,858 INFO L225 Difference]: With dead ends: 141 [2020-10-13 05:29:10,858 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 05:29:10,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 7 SyntacticMatches, 4 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=320, Invalid=1936, Unknown=0, NotChecked=0, Total=2256 [2020-10-13 05:29:10,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 05:29:10,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 122. [2020-10-13 05:29:10,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 05:29:10,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 128 transitions. [2020-10-13 05:29:10,887 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 128 transitions. Word has length 60 [2020-10-13 05:29:10,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 05:29:10,887 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 128 transitions. [2020-10-13 05:29:10,887 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 05:29:10,887 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 128 transitions. [2020-10-13 05:29:10,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-10-13 05:29:10,887 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 05:29:10,888 INFO L422 BasicCegarLoop]: trace histogram [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] [2020-10-13 05:29:10,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 05:29:10,888 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 05:29:10,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 05:29:10,888 INFO L82 PathProgramCache]: Analyzing trace with hash 70745740, now seen corresponding path program 13 times [2020-10-13 05:29:10,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 05:29:10,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1050613385] [2020-10-13 05:29:10,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 05:29:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:10,946 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:12,771 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:16,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:16,019 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-10-13 05:29:16,019 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 05:29:16,019 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5098 [2020-10-13 05:29:16,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 05:29:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 05:29:16,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 55 [2020-10-13 05:29:16,020 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:17,372 WARN L193 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 54 [2020-10-13 05:29:17,552 WARN L193 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2020-10-13 05:29:17,731 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 55 [2020-10-13 05:29:18,234 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 52 [2020-10-13 05:29:18,491 WARN L193 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 53 [2020-10-13 05:29:19,117 WARN L193 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 57 [2020-10-13 05:29:19,348 WARN L193 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 53 [2020-10-13 05:29:19,551 WARN L193 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-13 05:29:19,990 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 56 [2020-10-13 05:29:20,404 WARN L193 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 54 [2020-10-13 05:29:20,834 WARN L193 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 55 [2020-10-13 05:29:21,594 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 05:29:21,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 05:29:21,597 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 05:29:21,600 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 05:29:21,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 05:29:21,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 05:29:21,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 05:29:21,600 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 05:29:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 05:29:21,600 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 05:29:21,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 05:29:21,601 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 05:29:21,641 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 19 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-13 05:29:21,641 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1050613385] [2020-10-13 05:29:21,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 05:29:21,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 05:29:21,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116152673] [2020-10-13 05:29:21,642 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 05:29:21,642 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 05:29:21,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 05:29:21,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1271, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 05:29:21,643 INFO L87 Difference]: Start difference. First operand 122 states and 128 transitions. Second operand 38 states. [2020-10-13 05:29:22,352 WARN L193 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 63 [2020-10-13 05:29:22,785 WARN L193 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 55 [2020-10-13 05:29:23,265 WARN L193 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 59 [2020-10-13 05:29:23,575 WARN L193 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 54 [2020-10-13 05:29:23,898 WARN L193 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 54 [2020-10-13 05:29:24,694 WARN L193 SmtUtils]: Spent 344.00 ms on a formula simplification. DAG size of input: 105 DAG size of output: 69 [2020-10-13 05:29:24,998 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 52 [2020-10-13 05:29:25,578 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 64 [2020-10-13 05:29:25,829 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-13 05:29:26,543 WARN L193 SmtUtils]: Spent 424.00 ms on a formula simplification. DAG size of input: 116 DAG size of output: 80 [2020-10-13 05:29:26,906 WARN L193 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 64 [2020-10-13 05:29:27,581 WARN L193 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 121 DAG size of output: 83 [2020-10-13 05:29:27,867 WARN L193 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 84 DAG size of output: 59 [2020-10-13 05:29:28,737 WARN L193 SmtUtils]: Spent 518.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 99 [2020-10-13 05:29:29,160 WARN L193 SmtUtils]: Spent 290.00 ms on a formula simplification. DAG size of input: 98 DAG size of output: 73 [2020-10-13 05:29:29,802 WARN L193 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 105 [2020-10-13 05:29:30,157 WARN L193 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 79 [2020-10-13 05:29:31,039 WARN L193 SmtUtils]: Spent 601.00 ms on a formula simplification. DAG size of input: 135 DAG size of output: 115 [2020-10-13 05:29:31,567 WARN L193 SmtUtils]: Spent 387.00 ms on a formula simplification. DAG size of input: 115 DAG size of output: 93 [2020-10-13 05:29:32,143 WARN L193 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 97 DAG size of output: 88 [2020-10-13 05:29:32,706 WARN L193 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 69 [2020-10-13 05:29:33,279 WARN L193 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 106 DAG size of output: 90 [2020-10-13 05:29:33,766 WARN L193 SmtUtils]: Spent 304.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 63 [2020-10-13 05:29:34,411 WARN L193 SmtUtils]: Spent 384.00 ms on a formula simplification. DAG size of input: 108 DAG size of output: 97 [2020-10-13 05:29:35,006 WARN L193 SmtUtils]: Spent 392.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 78 [2020-10-13 05:29:36,137 WARN L193 SmtUtils]: Spent 674.00 ms on a formula simplification. DAG size of input: 141 DAG size of output: 117 [2020-10-13 05:29:36,664 WARN L193 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 65 [2020-10-13 05:29:37,279 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 48 [2020-10-13 05:29:37,993 WARN L193 SmtUtils]: Spent 480.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 80 [2020-10-13 05:29:38,621 WARN L193 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 67 [2020-10-13 05:29:39,253 WARN L193 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 65 [2020-10-13 05:29:40,150 WARN L193 SmtUtils]: Spent 623.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 67 [2020-10-13 05:29:40,954 WARN L193 SmtUtils]: Spent 511.00 ms on a formula simplification. DAG size of input: 92 DAG size of output: 80 [2020-10-13 05:29:41,758 WARN L193 SmtUtils]: Spent 345.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 67 [2020-10-13 05:29:42,478 WARN L193 SmtUtils]: Spent 438.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 81 [2020-10-13 05:29:43,030 WARN L193 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 78 DAG size of output: 68 [2020-10-13 05:29:43,730 WARN L193 SmtUtils]: Spent 433.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 82 [2020-10-13 05:29:44,283 WARN L193 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 67 [2020-10-13 05:29:44,756 WARN L193 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 81 [2020-10-13 05:29:45,160 WARN L193 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 77 DAG size of output: 64 [2020-10-13 05:29:45,772 WARN L193 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 99 DAG size of output: 82 [2020-10-13 05:29:46,086 WARN L193 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 50 [2020-10-13 05:29:46,510 WARN L193 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 74 [2020-10-13 05:29:46,934 WARN L193 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 87 DAG size of output: 60 [2020-10-13 05:29:47,570 WARN L193 SmtUtils]: Spent 399.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 85 [2020-10-13 05:29:47,951 WARN L193 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 53 [2020-10-13 05:29:48,312 WARN L193 SmtUtils]: Spent 228.00 ms on a formula simplification. DAG size of input: 94 DAG size of output: 65 [2020-10-13 05:29:48,777 WARN L193 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 90 DAG size of output: 69 [2020-10-13 05:29:49,161 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 54 [2020-10-13 05:29:49,660 WARN L193 SmtUtils]: Spent 310.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 71 [2020-10-13 05:29:50,060 WARN L193 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 54 [2020-10-13 05:29:50,647 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 89 DAG size of output: 71 [2020-10-13 05:29:51,063 WARN L193 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 53 [2020-10-13 05:29:51,778 WARN L193 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 66 [2020-10-13 05:29:52,436 WARN L193 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 64 [2020-10-13 05:29:53,440 WARN L193 SmtUtils]: Spent 516.00 ms on a formula simplification. DAG size of input: 88 DAG size of output: 76 [2020-10-13 05:29:53,944 WARN L193 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 86 DAG size of output: 54 [2020-10-13 05:29:54,667 WARN L193 SmtUtils]: Spent 318.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 70 [2020-10-13 05:29:55,792 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification. DAG size of input: 109 DAG size of output: 80