/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-examples/standard_copyInitSum2_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:50:05,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:50:05,667 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:50:05,712 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:50:05,712 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:50:05,720 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:50:05,723 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:50:05,726 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:50:05,729 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:50:05,732 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:50:05,733 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:50:05,734 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:50:05,734 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:50:05,737 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:50:05,739 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:50:05,741 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:50:05,743 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:50:05,744 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:50:05,745 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:50:05,753 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:50:05,755 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:50:05,757 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:50:05,757 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:50:05,759 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:50:05,771 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:50:05,771 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:50:05,772 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:50:05,778 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:50:05,778 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:50:05,782 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:50:05,782 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:50:05,783 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:50:05,784 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:50:05,785 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:50:05,788 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:50:05,789 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:50:05,789 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:50:05,790 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:50:05,790 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:50:05,791 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:50:05,792 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:50:05,793 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 04:50:05,835 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:50:05,836 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:50:05,839 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:50:05,839 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:50:05,839 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:50:05,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:50:05,840 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:50:05,840 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:50:05,840 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:50:05,841 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:50:05,842 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:50:05,842 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:50:05,842 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:50:05,843 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:50:05,843 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:50:05,843 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:50:05,843 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:50:05,844 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:50:05,844 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:50:05,844 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:50:05,844 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:50:05,844 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:50:05,845 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:50:05,845 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:50:05,845 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:50:05,846 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:50:05,846 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:50:05,846 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:50:05,846 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:50:05,846 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 04:50:06,195 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:50:06,206 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:50:06,212 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:50:06,213 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:50:06,214 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:50:06,215 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2020-10-13 04:50:06,289 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4e58ecb6/664e05a2d6924817851a79e308fef087/FLAG83a2361f6 [2020-10-13 04:50:06,754 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:50:06,754 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copyInitSum2_ground-2.i [2020-10-13 04:50:06,765 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4e58ecb6/664e05a2d6924817851a79e308fef087/FLAG83a2361f6 [2020-10-13 04:50:07,093 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/b4e58ecb6/664e05a2d6924817851a79e308fef087 [2020-10-13 04:50:07,104 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:50:07,105 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:50:07,109 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:50:07,109 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:50:07,112 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:50:07,113 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,117 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3afd2ce4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07, skipping insertion in model container [2020-10-13 04:50:07,118 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,126 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:50:07,142 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:50:07,315 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:50:07,320 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:50:07,339 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:50:07,354 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:50:07,355 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07 WrapperNode [2020-10-13 04:50:07,355 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:50:07,356 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:50:07,356 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:50:07,356 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:50:07,449 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,450 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,458 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,458 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,465 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,471 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,472 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (1/1) ... [2020-10-13 04:50:07,475 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:50:07,475 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:50:07,475 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:50:07,475 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:50:07,476 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (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 04:50:07,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:50:07,536 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:50:07,536 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:50:07,536 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:50:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:50:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:50:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:50:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:50:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:50:07,537 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:50:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:50:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:50:07,538 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:50:07,810 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:50:07,811 INFO L295 CfgBuilder]: Removed 4 assume(true) statements. [2020-10-13 04:50:07,820 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:50:07 BoogieIcfgContainer [2020-10-13 04:50:07,820 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:50:07,822 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:50:07,823 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:50:07,829 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:50:07,830 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:50:07" (1/3) ... [2020-10-13 04:50:07,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa2bc75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:50:07, skipping insertion in model container [2020-10-13 04:50:07,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:50:07" (2/3) ... [2020-10-13 04:50:07,831 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@fa2bc75 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:50:07, skipping insertion in model container [2020-10-13 04:50:07,831 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:50:07" (3/3) ... [2020-10-13 04:50:07,833 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copyInitSum2_ground-2.i [2020-10-13 04:50:07,843 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:50:07,849 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:50:07,861 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:50:07,881 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:50:07,882 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:50:07,882 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:50:07,882 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:50:07,882 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:50:07,882 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:50:07,882 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:50:07,882 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:50:07,898 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-10-13 04:50:07,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:50:07,903 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:07,904 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:07,905 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:07,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:07,909 INFO L82 PathProgramCache]: Analyzing trace with hash 1001985310, now seen corresponding path program 1 times [2020-10-13 04:50:07,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:07,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1565128287] [2020-10-13 04:50:07,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:08,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:08,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,115 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,406 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:08,406 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:50:08,406 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:08,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 379 [2020-10-13 04:50:08,413 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:08,415 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:50:08,416 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:08,416 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 5 [2020-10-13 04:50:08,485 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:08,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:08,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,495 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:08,496 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:08,496 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:08,497 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:50:08,497 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:08,497 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:08,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:08,498 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:08,498 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:08,507 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 04:50:08,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1565128287] [2020-10-13 04:50:08,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:50:08,511 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:50:08,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875956848] [2020-10-13 04:50:08,518 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:50:08,518 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:08,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:50:08,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:50:08,540 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 3 states. [2020-10-13 04:50:08,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:08,646 INFO L93 Difference]: Finished difference Result 51 states and 66 transitions. [2020-10-13 04:50:08,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:50:08,649 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 17 [2020-10-13 04:50:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:08,658 INFO L225 Difference]: With dead ends: 51 [2020-10-13 04:50:08,659 INFO L226 Difference]: Without dead ends: 24 [2020-10-13 04:50:08,663 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 04:50:08,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2020-10-13 04:50:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2020-10-13 04:50:08,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-10-13 04:50:08,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2020-10-13 04:50:08,703 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 17 [2020-10-13 04:50:08,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:08,704 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2020-10-13 04:50:08,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:50:08,704 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2020-10-13 04:50:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-13 04:50:08,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:08,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:08,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:50:08,706 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:08,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:08,707 INFO L82 PathProgramCache]: Analyzing trace with hash -400143846, now seen corresponding path program 1 times [2020-10-13 04:50:08,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:08,708 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559997220] [2020-10-13 04:50:08,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:08,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:08,726 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,737 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,751 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,930 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:08,930 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 25 [2020-10-13 04:50:08,930 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:08,931 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 209 [2020-10-13 04:50:08,934 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:08,934 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:50:08,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:08,935 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:50:08,935 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:08,981 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:08,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:08,985 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:08,988 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:08,989 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:08,989 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:08,989 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:50:08,989 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:08,990 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:08,991 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:08,995 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 04:50:08,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559997220] [2020-10-13 04:50:09,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:50:09,011 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:50:09,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394698428] [2020-10-13 04:50:09,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:50:09,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:09,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:50:09,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:50:09,014 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand 4 states. [2020-10-13 04:50:09,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:09,095 INFO L93 Difference]: Finished difference Result 46 states and 54 transitions. [2020-10-13 04:50:09,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:50:09,096 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 17 [2020-10-13 04:50:09,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:09,098 INFO L225 Difference]: With dead ends: 46 [2020-10-13 04:50:09,098 INFO L226 Difference]: Without dead ends: 29 [2020-10-13 04:50:09,099 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 04:50:09,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2020-10-13 04:50:09,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2020-10-13 04:50:09,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-10-13 04:50:09,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 30 transitions. [2020-10-13 04:50:09,108 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 30 transitions. Word has length 17 [2020-10-13 04:50:09,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:09,108 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 30 transitions. [2020-10-13 04:50:09,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:50:09,109 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 30 transitions. [2020-10-13 04:50:09,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-13 04:50:09,109 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:09,110 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 04:50:09,110 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:50:09,110 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:09,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:09,111 INFO L82 PathProgramCache]: Analyzing trace with hash -1150570790, now seen corresponding path program 1 times [2020-10-13 04:50:09,111 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:09,112 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [347901958] [2020-10-13 04:50:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:09,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:09,128 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,143 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:09,468 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,107 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:10,108 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 30 [2020-10-13 04:50:10,108 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:10,108 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 984 [2020-10-13 04:50:10,109 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:10,109 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:50:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:10,110 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 3 [2020-10-13 04:50:10,110 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:10,144 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:10,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:10,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,150 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:10,151 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:10,153 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:10,153 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:50:10,153 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:10,154 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:10,154 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2020-10-13 04:50:10,163 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [347901958] [2020-10-13 04:50:10,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:10,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:50:10,165 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893407512] [2020-10-13 04:50:10,165 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:50:10,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:10,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:50:10,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:50:10,168 INFO L87 Difference]: Start difference. First operand 27 states and 30 transitions. Second operand 5 states. [2020-10-13 04:50:10,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:10,277 INFO L93 Difference]: Finished difference Result 53 states and 61 transitions. [2020-10-13 04:50:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:50:10,278 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 22 [2020-10-13 04:50:10,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:10,279 INFO L225 Difference]: With dead ends: 53 [2020-10-13 04:50:10,279 INFO L226 Difference]: Without dead ends: 34 [2020-10-13 04:50:10,280 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 04:50:10,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-10-13 04:50:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-10-13 04:50:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:50:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 35 transitions. [2020-10-13 04:50:10,288 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 35 transitions. Word has length 22 [2020-10-13 04:50:10,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:10,288 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 35 transitions. [2020-10-13 04:50:10,289 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:50:10,289 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 35 transitions. [2020-10-13 04:50:10,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:50:10,290 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:10,290 INFO L422 BasicCegarLoop]: trace histogram [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 04:50:10,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:50:10,291 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:10,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1868122094, now seen corresponding path program 2 times [2020-10-13 04:50:10,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:10,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314374857] [2020-10-13 04:50:10,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:10,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:10,304 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,317 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:10,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:11,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,599 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:12,600 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:50:12,600 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:12,600 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2297 [2020-10-13 04:50:12,601 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:12,601 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:50:12,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:12,602 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:50:12,602 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:12,653 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:12,658 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,660 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:12,660 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:12,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:12,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:12,661 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:12,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:12,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:12,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:12,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2020-10-13 04:50:12,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314374857] [2020-10-13 04:50:12,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:12,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:50:12,668 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276052952] [2020-10-13 04:50:12,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:50:12,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:12,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:50:12,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:50:12,670 INFO L87 Difference]: Start difference. First operand 32 states and 35 transitions. Second operand 6 states. [2020-10-13 04:50:12,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:12,807 INFO L93 Difference]: Finished difference Result 62 states and 70 transitions. [2020-10-13 04:50:12,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:50:12,808 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 27 [2020-10-13 04:50:12,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:12,809 INFO L225 Difference]: With dead ends: 62 [2020-10-13 04:50:12,809 INFO L226 Difference]: Without dead ends: 39 [2020-10-13 04:50:12,810 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:50:12,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-10-13 04:50:12,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2020-10-13 04:50:12,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-13 04:50:12,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 40 transitions. [2020-10-13 04:50:12,818 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 40 transitions. Word has length 27 [2020-10-13 04:50:12,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:12,819 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 40 transitions. [2020-10-13 04:50:12,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:50:12,819 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 40 transitions. [2020-10-13 04:50:12,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2020-10-13 04:50:12,820 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:12,821 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:12,821 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:50:12,822 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash 150752210, now seen corresponding path program 3 times [2020-10-13 04:50:12,822 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:12,823 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1291367408] [2020-10-13 04:50:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:12,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:12,838 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:12,878 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:14,729 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:17,840 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:17,840 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-10-13 04:50:17,841 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:17,841 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:50:17,842 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:17,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:50:17,842 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:17,843 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 5 [2020-10-13 04:50:17,843 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:17,906 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:17,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:17,909 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:17,911 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:17,911 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:17,912 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:17,912 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:50:17,912 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:17,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:17,913 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:17,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:17,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2020-10-13 04:50:17,918 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1291367408] [2020-10-13 04:50:17,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:17,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:50:17,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666824210] [2020-10-13 04:50:17,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:50:17,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:17,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:50:17,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:50:17,921 INFO L87 Difference]: Start difference. First operand 37 states and 40 transitions. Second operand 7 states. [2020-10-13 04:50:18,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:18,062 INFO L93 Difference]: Finished difference Result 71 states and 79 transitions. [2020-10-13 04:50:18,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:50:18,063 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 32 [2020-10-13 04:50:18,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:18,064 INFO L225 Difference]: With dead ends: 71 [2020-10-13 04:50:18,064 INFO L226 Difference]: Without dead ends: 44 [2020-10-13 04:50:18,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:50:18,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2020-10-13 04:50:18,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 42. [2020-10-13 04:50:18,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-13 04:50:18,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 45 transitions. [2020-10-13 04:50:18,074 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 45 transitions. Word has length 32 [2020-10-13 04:50:18,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:18,074 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 45 transitions. [2020-10-13 04:50:18,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:50:18,075 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 45 transitions. [2020-10-13 04:50:18,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2020-10-13 04:50:18,077 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:18,077 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:18,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:50:18,078 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:18,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:18,078 INFO L82 PathProgramCache]: Analyzing trace with hash -125121014, now seen corresponding path program 4 times [2020-10-13 04:50:18,079 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:18,079 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722994151] [2020-10-13 04:50:18,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:18,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:18,103 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,136 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:18,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:21,941 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:23,102 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:23,102 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 45 [2020-10-13 04:50:23,103 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:23,103 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:50:23,104 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:23,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:50:23,104 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:23,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:50:23,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:23,183 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:23,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:23,190 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:23,191 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:23,191 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:23,191 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:50:23,192 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:23,192 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:23,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:23,195 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:23,196 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:50:23,201 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2020-10-13 04:50:23,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722994151] [2020-10-13 04:50:23,203 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:23,203 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:50:23,204 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412444706] [2020-10-13 04:50:23,204 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:50:23,204 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:23,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:50:23,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:50:23,206 INFO L87 Difference]: Start difference. First operand 42 states and 45 transitions. Second operand 8 states. [2020-10-13 04:50:23,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:23,391 INFO L93 Difference]: Finished difference Result 80 states and 88 transitions. [2020-10-13 04:50:23,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:50:23,391 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 37 [2020-10-13 04:50:23,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:23,393 INFO L225 Difference]: With dead ends: 80 [2020-10-13 04:50:23,393 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:50:23,396 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:50:23,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:50:23,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2020-10-13 04:50:23,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-13 04:50:23,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 50 transitions. [2020-10-13 04:50:23,408 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 50 transitions. Word has length 37 [2020-10-13 04:50:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:23,411 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 50 transitions. [2020-10-13 04:50:23,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:50:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 50 transitions. [2020-10-13 04:50:23,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-10-13 04:50:23,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:23,414 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:23,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:50:23,415 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:23,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:23,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1558523702, now seen corresponding path program 5 times [2020-10-13 04:50:23,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:23,416 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798821613] [2020-10-13 04:50:23,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:23,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:23,440 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:23,461 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:23,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:27,887 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,454 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:28,457 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 50 [2020-10-13 04:50:28,458 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:50:28,458 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:50:28,458 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:50:28,458 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:28,459 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 7 [2020-10-13 04:50:28,459 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:28,549 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:28,551 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,553 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:28,554 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:28,554 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:28,554 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-10-13 04:50:28,555 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:28,555 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:28,556 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:28,556 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:50:28,560 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 50 trivial. 0 not checked. [2020-10-13 04:50:28,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798821613] [2020-10-13 04:50:28,561 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:28,562 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:50:28,563 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327951127] [2020-10-13 04:50:28,563 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:50:28,564 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:28,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:50:28,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:50:28,565 INFO L87 Difference]: Start difference. First operand 47 states and 50 transitions. Second operand 9 states. [2020-10-13 04:50:28,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:28,728 INFO L93 Difference]: Finished difference Result 89 states and 97 transitions. [2020-10-13 04:50:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:50:28,729 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 42 [2020-10-13 04:50:28,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:28,730 INFO L225 Difference]: With dead ends: 89 [2020-10-13 04:50:28,730 INFO L226 Difference]: Without dead ends: 54 [2020-10-13 04:50:28,731 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:50:28,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-13 04:50:28,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-10-13 04:50:28,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-13 04:50:28,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2020-10-13 04:50:28,738 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 42 [2020-10-13 04:50:28,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:28,739 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2020-10-13 04:50:28,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:50:28,739 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2020-10-13 04:50:28,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-10-13 04:50:28,740 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:28,741 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:28,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:50:28,741 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:28,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:28,742 INFO L82 PathProgramCache]: Analyzing trace with hash -1349350398, now seen corresponding path program 6 times [2020-10-13 04:50:28,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:28,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203538674] [2020-10-13 04:50:28,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:28,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:28,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:28,891 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:33,756 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 55 [2020-10-13 04:50:33,756 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:33,756 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:50:33,757 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:50:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:33,757 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:50:33,757 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:33,841 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:33,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:33,842 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:33,843 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:33,843 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:33,843 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:33,843 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:33,844 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:33,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:33,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:33,844 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:33,844 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:33,847 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2020-10-13 04:50:33,848 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203538674] [2020-10-13 04:50:33,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:33,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:50:33,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499824128] [2020-10-13 04:50:33,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:50:33,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:33,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:50:33,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:50:33,850 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand 10 states. [2020-10-13 04:50:33,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:33,990 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-13 04:50:33,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:50:33,991 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 47 [2020-10-13 04:50:33,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:33,992 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:50:33,992 INFO L226 Difference]: Without dead ends: 59 [2020-10-13 04:50:33,993 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:50:33,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2020-10-13 04:50:33,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 57. [2020-10-13 04:50:33,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-13 04:50:33,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2020-10-13 04:50:34,000 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 47 [2020-10-13 04:50:34,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:34,000 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2020-10-13 04:50:34,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:50:34,000 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2020-10-13 04:50:34,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2020-10-13 04:50:34,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:34,001 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:34,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:50:34,002 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1128841790, now seen corresponding path program 7 times [2020-10-13 04:50:34,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:34,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049536239] [2020-10-13 04:50:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:34,017 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:34,039 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:34,158 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:39,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:39,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-10-13 04:50:39,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:39,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:50:39,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:39,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:50:39,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:39,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 9 [2020-10-13 04:50:39,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:39,107 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:39,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:39,110 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:39,110 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:39,111 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:39,111 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:39,111 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:39,112 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:39,112 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:39,116 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 98 trivial. 0 not checked. [2020-10-13 04:50:39,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049536239] [2020-10-13 04:50:39,122 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:39,122 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:50:39,123 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440094107] [2020-10-13 04:50:39,124 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:50:39,125 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:39,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:50:39,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:50:39,125 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand 11 states. [2020-10-13 04:50:39,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:39,287 INFO L93 Difference]: Finished difference Result 107 states and 115 transitions. [2020-10-13 04:50:39,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:50:39,288 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 52 [2020-10-13 04:50:39,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:39,289 INFO L225 Difference]: With dead ends: 107 [2020-10-13 04:50:39,289 INFO L226 Difference]: Without dead ends: 64 [2020-10-13 04:50:39,290 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:50:39,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2020-10-13 04:50:39,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 62. [2020-10-13 04:50:39,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:50:39,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 65 transitions. [2020-10-13 04:50:39,305 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 65 transitions. Word has length 52 [2020-10-13 04:50:39,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:39,305 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 65 transitions. [2020-10-13 04:50:39,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:50:39,305 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 65 transitions. [2020-10-13 04:50:39,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 04:50:39,306 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:39,306 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:39,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:50:39,307 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:39,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:39,308 INFO L82 PathProgramCache]: Analyzing trace with hash -612503046, now seen corresponding path program 8 times [2020-10-13 04:50:39,308 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:39,308 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952347184] [2020-10-13 04:50:39,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:39,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:39,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:39,352 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:39,508 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:44,325 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:44,325 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 04:50:44,325 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:44,325 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:50:44,325 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:44,325 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:50:44,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:44,326 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:50:44,326 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:44,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:44,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:44,426 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:44,426 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:44,427 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:44,427 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:44,427 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:44,427 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:44,427 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:44,428 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:44,428 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:44,433 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 128 trivial. 0 not checked. [2020-10-13 04:50:44,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952347184] [2020-10-13 04:50:44,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:44,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:50:44,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273735123] [2020-10-13 04:50:44,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:50:44,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:44,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:50:44,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:50:44,436 INFO L87 Difference]: Start difference. First operand 62 states and 65 transitions. Second operand 12 states. [2020-10-13 04:50:44,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:44,572 INFO L93 Difference]: Finished difference Result 116 states and 124 transitions. [2020-10-13 04:50:44,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:50:44,573 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 57 [2020-10-13 04:50:44,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:44,573 INFO L225 Difference]: With dead ends: 116 [2020-10-13 04:50:44,574 INFO L226 Difference]: Without dead ends: 69 [2020-10-13 04:50:44,574 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:50:44,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-13 04:50:44,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 67. [2020-10-13 04:50:44,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-13 04:50:44,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 70 transitions. [2020-10-13 04:50:44,587 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 70 transitions. Word has length 57 [2020-10-13 04:50:44,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:44,587 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 70 transitions. [2020-10-13 04:50:44,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:50:44,588 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 70 transitions. [2020-10-13 04:50:44,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-10-13 04:50:44,591 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:44,593 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:44,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:50:44,594 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:44,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:44,594 INFO L82 PathProgramCache]: Analyzing trace with hash -490630470, now seen corresponding path program 9 times [2020-10-13 04:50:44,594 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:44,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1555802528] [2020-10-13 04:50:44,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:44,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:44,611 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:44,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:44,787 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:49,627 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:49,628 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 70 [2020-10-13 04:50:49,628 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:49,628 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5020 [2020-10-13 04:50:49,628 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:49,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:50:49,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:49,628 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 11 [2020-10-13 04:50:49,628 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:49,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:49,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:49,752 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:49,753 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:49,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:49,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:49,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:49,754 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:49,754 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:49,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:49,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:49,761 INFO L134 CoverageAnalysis]: Checked inductivity of 207 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-13 04:50:49,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1555802528] [2020-10-13 04:50:49,762 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:49,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:50:49,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031253303] [2020-10-13 04:50:49,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:50:49,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:49,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:50:49,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:50:49,765 INFO L87 Difference]: Start difference. First operand 67 states and 70 transitions. Second operand 13 states. [2020-10-13 04:50:49,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:49,937 INFO L93 Difference]: Finished difference Result 125 states and 133 transitions. [2020-10-13 04:50:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:50:49,937 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 62 [2020-10-13 04:50:49,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:49,939 INFO L225 Difference]: With dead ends: 125 [2020-10-13 04:50:49,939 INFO L226 Difference]: Without dead ends: 74 [2020-10-13 04:50:49,940 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:50:49,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-13 04:50:49,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-10-13 04:50:49,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:50:49,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 75 transitions. [2020-10-13 04:50:49,952 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 75 transitions. Word has length 62 [2020-10-13 04:50:49,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:49,952 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 75 transitions. [2020-10-13 04:50:49,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:50:49,953 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 75 transitions. [2020-10-13 04:50:49,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:50:49,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:49,954 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:49,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:50:49,954 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:49,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:49,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1207107598, now seen corresponding path program 10 times [2020-10-13 04:50:49,954 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:49,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025288343] [2020-10-13 04:50:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:49,968 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:49,998 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:50,169 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:54,972 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:54,972 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:50:54,972 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:54,973 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:50:54,973 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:50:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:54,973 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:50:54,974 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:55,095 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:55,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:55,098 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:55,099 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:55,099 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:55,099 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:55,099 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:55,099 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:55,100 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:55,100 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 255 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 200 trivial. 0 not checked. [2020-10-13 04:50:55,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025288343] [2020-10-13 04:50:55,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:55,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:50:55,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893954255] [2020-10-13 04:50:55,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:50:55,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:55,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:50:55,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:50:55,107 INFO L87 Difference]: Start difference. First operand 72 states and 75 transitions. Second operand 14 states. [2020-10-13 04:50:55,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:55,301 INFO L93 Difference]: Finished difference Result 134 states and 142 transitions. [2020-10-13 04:50:55,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:50:55,302 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 67 [2020-10-13 04:50:55,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:55,303 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:50:55,304 INFO L226 Difference]: Without dead ends: 79 [2020-10-13 04:50:55,305 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:50:55,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-13 04:50:55,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2020-10-13 04:50:55,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-13 04:50:55,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 80 transitions. [2020-10-13 04:50:55,311 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 80 transitions. Word has length 67 [2020-10-13 04:50:55,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:55,311 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 80 transitions. [2020-10-13 04:50:55,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:50:55,312 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 80 transitions. [2020-10-13 04:50:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2020-10-13 04:50:55,313 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:55,313 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:55,313 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:50:55,313 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:55,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:55,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2083114930, now seen corresponding path program 11 times [2020-10-13 04:50:55,314 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:55,314 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1645951477] [2020-10-13 04:50:55,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:55,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:55,328 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:55,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:55,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:00,385 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:00,386 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-10-13 04:51:00,386 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:00,386 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5062 [2020-10-13 04:51:00,386 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:51:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:00,387 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-10-13 04:51:00,387 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:00,518 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:00,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:00,520 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:00,521 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:00,521 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:00,521 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:00,521 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:00,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:00,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:00,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:00,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:00,522 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:00,526 INFO L134 CoverageAnalysis]: Checked inductivity of 308 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 242 trivial. 0 not checked. [2020-10-13 04:51:00,526 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1645951477] [2020-10-13 04:51:00,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:00,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:51:00,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184231408] [2020-10-13 04:51:00,528 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:51:00,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:00,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:51:00,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:51:00,529 INFO L87 Difference]: Start difference. First operand 77 states and 80 transitions. Second operand 15 states. [2020-10-13 04:51:00,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:00,738 INFO L93 Difference]: Finished difference Result 143 states and 151 transitions. [2020-10-13 04:51:00,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:51:00,739 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 72 [2020-10-13 04:51:00,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:00,740 INFO L225 Difference]: With dead ends: 143 [2020-10-13 04:51:00,740 INFO L226 Difference]: Without dead ends: 84 [2020-10-13 04:51:00,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:51:00,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-13 04:51:00,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 82. [2020-10-13 04:51:00,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:51:00,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 85 transitions. [2020-10-13 04:51:00,751 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 85 transitions. Word has length 72 [2020-10-13 04:51:00,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:00,751 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 85 transitions. [2020-10-13 04:51:00,751 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:51:00,751 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 85 transitions. [2020-10-13 04:51:00,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 04:51:00,752 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:00,752 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:00,753 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:51:00,753 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 385857002, now seen corresponding path program 12 times [2020-10-13 04:51:00,753 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:00,754 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [45381293] [2020-10-13 04:51:00,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:00,766 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:00,789 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:00,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:05,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:05,764 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:51:05,764 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:51:05,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5000 [2020-10-13 04:51:05,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:05,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:51:05,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:05,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:51:05,765 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:05,909 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:05,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:05,911 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:05,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:05,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:05,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:05,914 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:05,914 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:05,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:05,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:05,915 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:05,915 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:51:05,923 INFO L134 CoverageAnalysis]: Checked inductivity of 366 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2020-10-13 04:51:05,923 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [45381293] [2020-10-13 04:51:05,924 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:05,924 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:51:05,924 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735492884] [2020-10-13 04:51:05,925 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:51:05,925 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:51:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:51:05,926 INFO L87 Difference]: Start difference. First operand 82 states and 85 transitions. Second operand 16 states. [2020-10-13 04:51:06,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:06,119 INFO L93 Difference]: Finished difference Result 152 states and 160 transitions. [2020-10-13 04:51:06,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:51:06,119 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 77 [2020-10-13 04:51:06,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:06,120 INFO L225 Difference]: With dead ends: 152 [2020-10-13 04:51:06,120 INFO L226 Difference]: Without dead ends: 89 [2020-10-13 04:51:06,121 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:51:06,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-13 04:51:06,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 87. [2020-10-13 04:51:06,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-13 04:51:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 90 transitions. [2020-10-13 04:51:06,127 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 90 transitions. Word has length 77 [2020-10-13 04:51:06,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:06,127 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 90 transitions. [2020-10-13 04:51:06,128 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:51:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 90 transitions. [2020-10-13 04:51:06,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2020-10-13 04:51:06,129 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:06,129 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:06,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:51:06,129 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:06,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:06,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1239413930, now seen corresponding path program 13 times [2020-10-13 04:51:06,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:06,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210421008] [2020-10-13 04:51:06,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:06,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:06,145 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:06,188 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:11,161 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:11,162 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 90 [2020-10-13 04:51:11,162 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:11,162 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5021 [2020-10-13 04:51:11,162 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:51:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:11,162 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 15 [2020-10-13 04:51:11,163 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:11,313 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:11,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:11,315 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:11,316 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:11,316 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:11,317 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:11,317 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:11,317 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:11,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:11,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:11,317 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:11,318 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:11,322 INFO L134 CoverageAnalysis]: Checked inductivity of 429 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 338 trivial. 0 not checked. [2020-10-13 04:51:11,322 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210421008] [2020-10-13 04:51:11,322 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:11,322 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:51:11,323 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665291730] [2020-10-13 04:51:11,323 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:51:11,323 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:11,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:51:11,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:51:11,324 INFO L87 Difference]: Start difference. First operand 87 states and 90 transitions. Second operand 17 states. [2020-10-13 04:51:11,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:11,542 INFO L93 Difference]: Finished difference Result 161 states and 169 transitions. [2020-10-13 04:51:11,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:51:11,543 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 82 [2020-10-13 04:51:11,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:11,544 INFO L225 Difference]: With dead ends: 161 [2020-10-13 04:51:11,544 INFO L226 Difference]: Without dead ends: 94 [2020-10-13 04:51:11,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:51:11,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-13 04:51:11,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-10-13 04:51:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-13 04:51:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 95 transitions. [2020-10-13 04:51:11,552 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 95 transitions. Word has length 82 [2020-10-13 04:51:11,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:11,553 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 95 transitions. [2020-10-13 04:51:11,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:51:11,553 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 95 transitions. [2020-10-13 04:51:11,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-10-13 04:51:11,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:11,554 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:11,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:51:11,555 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:11,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:11,555 INFO L82 PathProgramCache]: Analyzing trace with hash -535424030, now seen corresponding path program 14 times [2020-10-13 04:51:11,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:11,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1827287275] [2020-10-13 04:51:11,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:11,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:11,570 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:11,599 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:16,583 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:16,583 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 95 [2020-10-13 04:51:16,583 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:16,583 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5017 [2020-10-13 04:51:16,584 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:51:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:16,584 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:51:16,584 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:16,751 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:16,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:16,753 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:16,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:16,754 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:16,754 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:16,754 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:16,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:16,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:16,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:16,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:16,755 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 497 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2020-10-13 04:51:16,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1827287275] [2020-10-13 04:51:16,760 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:16,760 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:51:16,760 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359861739] [2020-10-13 04:51:16,761 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:51:16,761 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:16,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:51:16,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:51:16,762 INFO L87 Difference]: Start difference. First operand 92 states and 95 transitions. Second operand 18 states. [2020-10-13 04:51:16,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:16,976 INFO L93 Difference]: Finished difference Result 170 states and 178 transitions. [2020-10-13 04:51:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:51:16,976 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 87 [2020-10-13 04:51:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:16,977 INFO L225 Difference]: With dead ends: 170 [2020-10-13 04:51:16,977 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:51:16,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:51:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:51:16,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2020-10-13 04:51:16,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-13 04:51:16,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2020-10-13 04:51:16,983 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 87 [2020-10-13 04:51:16,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:16,983 INFO L479 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2020-10-13 04:51:16,984 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:51:16,984 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2020-10-13 04:51:16,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2020-10-13 04:51:16,985 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:16,985 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:16,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:51:16,985 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:16,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:16,986 INFO L82 PathProgramCache]: Analyzing trace with hash -422313566, now seen corresponding path program 15 times [2020-10-13 04:51:16,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:16,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549509417] [2020-10-13 04:51:16,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:16,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:17,002 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:17,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:22,029 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:22,029 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-10-13 04:51:22,030 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:22,030 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5032 [2020-10-13 04:51:22,030 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:22,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:51:22,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:22,030 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 17 [2020-10-13 04:51:22,031 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:22,289 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:22,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:22,293 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:22,294 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:22,294 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:22,294 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:51:22,295 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:22,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:22,295 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:22,296 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:22,296 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:51:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 570 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 450 trivial. 0 not checked. [2020-10-13 04:51:22,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549509417] [2020-10-13 04:51:22,309 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:22,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:51:22,310 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104456973] [2020-10-13 04:51:22,311 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:51:22,311 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:22,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:51:22,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:51:22,313 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand 19 states. [2020-10-13 04:51:22,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:22,644 INFO L93 Difference]: Finished difference Result 179 states and 187 transitions. [2020-10-13 04:51:22,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:51:22,645 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 92 [2020-10-13 04:51:22,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:22,646 INFO L225 Difference]: With dead ends: 179 [2020-10-13 04:51:22,646 INFO L226 Difference]: Without dead ends: 104 [2020-10-13 04:51:22,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:51:22,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-13 04:51:22,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 102. [2020-10-13 04:51:22,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:51:22,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 105 transitions. [2020-10-13 04:51:22,663 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 105 transitions. Word has length 92 [2020-10-13 04:51:22,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:22,664 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 105 transitions. [2020-10-13 04:51:22,664 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:51:22,664 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 105 transitions. [2020-10-13 04:51:22,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:51:22,671 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:22,672 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:22,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:51:22,672 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:22,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:22,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1861215782, now seen corresponding path program 16 times [2020-10-13 04:51:22,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:22,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1009026362] [2020-10-13 04:51:22,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:22,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:22,706 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:22,785 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:27,720 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:27,720 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:51:27,720 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:27,720 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:51:27,720 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:51:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:27,721 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:51:27,721 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:27,942 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:27,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:27,944 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:27,945 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:27,945 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:27,945 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:27,945 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:27,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:27,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:27,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:27,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 648 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 512 trivial. 0 not checked. [2020-10-13 04:51:27,954 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1009026362] [2020-10-13 04:51:27,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:27,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:51:27,960 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280688884] [2020-10-13 04:51:27,963 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:51:27,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:27,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:51:27,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:51:27,964 INFO L87 Difference]: Start difference. First operand 102 states and 105 transitions. Second operand 20 states. [2020-10-13 04:51:28,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:28,225 INFO L93 Difference]: Finished difference Result 188 states and 196 transitions. [2020-10-13 04:51:28,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:51:28,225 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 97 [2020-10-13 04:51:28,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:28,227 INFO L225 Difference]: With dead ends: 188 [2020-10-13 04:51:28,227 INFO L226 Difference]: Without dead ends: 109 [2020-10-13 04:51:28,228 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:51:28,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-13 04:51:28,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2020-10-13 04:51:28,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 107 states. [2020-10-13 04:51:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 110 transitions. [2020-10-13 04:51:28,234 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 110 transitions. Word has length 97 [2020-10-13 04:51:28,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:28,234 INFO L479 AbstractCegarLoop]: Abstraction has 107 states and 110 transitions. [2020-10-13 04:51:28,234 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:51:28,234 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 110 transitions. [2020-10-13 04:51:28,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2020-10-13 04:51:28,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:28,236 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:28,236 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:51:28,236 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:28,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1207301786, now seen corresponding path program 17 times [2020-10-13 04:51:28,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:28,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1156320411] [2020-10-13 04:51:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:28,251 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:28,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:33,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:33,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 110 [2020-10-13 04:51:33,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:33,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5080 [2020-10-13 04:51:33,329 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:51:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:33,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 19 [2020-10-13 04:51:33,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:33,555 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:33,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:33,557 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:33,558 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:33,559 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:33,559 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:33,559 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:33,559 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:33,559 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:33,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:33,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:33,566 INFO L134 CoverageAnalysis]: Checked inductivity of 731 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 578 trivial. 0 not checked. [2020-10-13 04:51:33,567 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1156320411] [2020-10-13 04:51:33,567 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:33,567 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:51:33,567 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513994378] [2020-10-13 04:51:33,568 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:51:33,568 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:33,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:51:33,568 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:51:33,569 INFO L87 Difference]: Start difference. First operand 107 states and 110 transitions. Second operand 21 states. [2020-10-13 04:51:33,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:33,866 INFO L93 Difference]: Finished difference Result 197 states and 205 transitions. [2020-10-13 04:51:33,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:51:33,866 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 102 [2020-10-13 04:51:33,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:33,867 INFO L225 Difference]: With dead ends: 197 [2020-10-13 04:51:33,867 INFO L226 Difference]: Without dead ends: 114 [2020-10-13 04:51:33,869 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:51:33,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-13 04:51:33,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 112. [2020-10-13 04:51:33,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:51:33,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 115 transitions. [2020-10-13 04:51:33,873 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 115 transitions. Word has length 102 [2020-10-13 04:51:33,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:33,873 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 115 transitions. [2020-10-13 04:51:33,873 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:51:33,874 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 115 transitions. [2020-10-13 04:51:33,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:51:33,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:33,875 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:33,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:51:33,875 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1112684590, now seen corresponding path program 18 times [2020-10-13 04:51:33,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:33,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1072971920] [2020-10-13 04:51:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:33,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:33,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:33,953 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:38,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:38,894 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:51:38,894 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:51:38,894 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:51:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:38,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:51:38,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:39,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:39,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:39,134 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:39,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:39,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:39,135 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:39,135 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:39,135 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:39,135 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:39,142 INFO L134 CoverageAnalysis]: Checked inductivity of 819 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 648 trivial. 0 not checked. [2020-10-13 04:51:39,142 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1072971920] [2020-10-13 04:51:39,142 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:39,142 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:51:39,142 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771838429] [2020-10-13 04:51:39,143 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:51:39,143 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:39,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:51:39,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:51:39,144 INFO L87 Difference]: Start difference. First operand 112 states and 115 transitions. Second operand 22 states. [2020-10-13 04:51:39,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:39,419 INFO L93 Difference]: Finished difference Result 206 states and 214 transitions. [2020-10-13 04:51:39,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:51:39,419 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 107 [2020-10-13 04:51:39,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:39,421 INFO L225 Difference]: With dead ends: 206 [2020-10-13 04:51:39,421 INFO L226 Difference]: Without dead ends: 119 [2020-10-13 04:51:39,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:51:39,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-13 04:51:39,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2020-10-13 04:51:39,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-13 04:51:39,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 120 transitions. [2020-10-13 04:51:39,427 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 120 transitions. Word has length 107 [2020-10-13 04:51:39,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:39,428 INFO L479 AbstractCegarLoop]: Abstraction has 117 states and 120 transitions. [2020-10-13 04:51:39,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:51:39,428 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 120 transitions. [2020-10-13 04:51:39,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2020-10-13 04:51:39,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:39,429 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:39,429 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:51:39,429 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:39,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:39,429 INFO L82 PathProgramCache]: Analyzing trace with hash 1010160530, now seen corresponding path program 19 times [2020-10-13 04:51:39,430 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:39,430 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [358815134] [2020-10-13 04:51:39,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:39,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:39,442 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:39,489 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:44,472 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:44,472 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 120 [2020-10-13 04:51:44,472 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:44,472 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 04:51:44,473 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:51:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:44,473 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 21 [2020-10-13 04:51:44,473 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:44,745 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:44,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:44,748 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:44,748 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:44,748 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:44,748 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:44,748 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:44,749 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:44,749 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:44,755 INFO L134 CoverageAnalysis]: Checked inductivity of 912 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 722 trivial. 0 not checked. [2020-10-13 04:51:44,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [358815134] [2020-10-13 04:51:44,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:44,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:51:44,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270836578] [2020-10-13 04:51:44,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:51:44,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:44,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:51:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:51:44,757 INFO L87 Difference]: Start difference. First operand 117 states and 120 transitions. Second operand 23 states. [2020-10-13 04:51:45,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:45,078 INFO L93 Difference]: Finished difference Result 215 states and 223 transitions. [2020-10-13 04:51:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:51:45,079 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 112 [2020-10-13 04:51:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:45,080 INFO L225 Difference]: With dead ends: 215 [2020-10-13 04:51:45,080 INFO L226 Difference]: Without dead ends: 124 [2020-10-13 04:51:45,081 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:51:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-13 04:51:45,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2020-10-13 04:51:45,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-13 04:51:45,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 125 transitions. [2020-10-13 04:51:45,088 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 125 transitions. Word has length 112 [2020-10-13 04:51:45,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:45,089 INFO L479 AbstractCegarLoop]: Abstraction has 122 states and 125 transitions. [2020-10-13 04:51:45,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:51:45,089 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 125 transitions. [2020-10-13 04:51:45,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2020-10-13 04:51:45,091 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:45,091 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:45,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:51:45,091 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:45,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:45,092 INFO L82 PathProgramCache]: Analyzing trace with hash -1884348982, now seen corresponding path program 20 times [2020-10-13 04:51:45,092 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:45,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782125978] [2020-10-13 04:51:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:45,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:45,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:45,192 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:50,143 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:50,144 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 125 [2020-10-13 04:51:50,144 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:51:50,144 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:51:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:50,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:51:50,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:50,435 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:50,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:50,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:50,437 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:50,438 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:50,438 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:50,438 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:50,438 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:50,439 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:50,439 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:50,445 INFO L134 CoverageAnalysis]: Checked inductivity of 1010 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 800 trivial. 0 not checked. [2020-10-13 04:51:50,446 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782125978] [2020-10-13 04:51:50,446 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:50,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:51:50,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281361187] [2020-10-13 04:51:50,447 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:51:50,447 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:50,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:51:50,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:51:50,447 INFO L87 Difference]: Start difference. First operand 122 states and 125 transitions. Second operand 24 states. [2020-10-13 04:51:50,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:50,773 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2020-10-13 04:51:50,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:51:50,776 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 117 [2020-10-13 04:51:50,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:50,777 INFO L225 Difference]: With dead ends: 224 [2020-10-13 04:51:50,778 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:51:50,778 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:51:50,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:51:50,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 127. [2020-10-13 04:51:50,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 127 states. [2020-10-13 04:51:50,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 130 transitions. [2020-10-13 04:51:50,784 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 130 transitions. Word has length 117 [2020-10-13 04:51:50,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:50,784 INFO L479 AbstractCegarLoop]: Abstraction has 127 states and 130 transitions. [2020-10-13 04:51:50,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:51:50,784 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 130 transitions. [2020-10-13 04:51:50,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2020-10-13 04:51:50,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:50,785 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:50,785 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:51:50,786 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:50,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:50,786 INFO L82 PathProgramCache]: Analyzing trace with hash -326920054, now seen corresponding path program 21 times [2020-10-13 04:51:50,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:50,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167459435] [2020-10-13 04:51:50,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:50,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:50,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:50,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:55,867 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:55,867 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 130 [2020-10-13 04:51:55,867 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:51:55,867 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 04:51:55,868 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:51:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:51:55,868 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-10-13 04:51:55,868 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:56,182 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:51:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:56,185 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:56,185 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:51:56,186 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:51:56,186 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:51:56,186 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:51:56,186 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:51:56,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:51:56,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:51:56,186 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:51:56,186 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:51:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1113 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 882 trivial. 0 not checked. [2020-10-13 04:51:56,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167459435] [2020-10-13 04:51:56,194 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:51:56,194 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:51:56,194 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409665115] [2020-10-13 04:51:56,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:51:56,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:51:56,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:51:56,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:51:56,196 INFO L87 Difference]: Start difference. First operand 127 states and 130 transitions. Second operand 25 states. [2020-10-13 04:51:56,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:51:56,527 INFO L93 Difference]: Finished difference Result 233 states and 241 transitions. [2020-10-13 04:51:56,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:51:56,527 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 122 [2020-10-13 04:51:56,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:51:56,529 INFO L225 Difference]: With dead ends: 233 [2020-10-13 04:51:56,529 INFO L226 Difference]: Without dead ends: 134 [2020-10-13 04:51:56,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:51:56,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-10-13 04:51:56,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 132. [2020-10-13 04:51:56,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-13 04:51:56,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 135 transitions. [2020-10-13 04:51:56,536 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 135 transitions. Word has length 122 [2020-10-13 04:51:56,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:51:56,536 INFO L479 AbstractCegarLoop]: Abstraction has 132 states and 135 transitions. [2020-10-13 04:51:56,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:51:56,536 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 135 transitions. [2020-10-13 04:51:56,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2020-10-13 04:51:56,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:51:56,538 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:51:56,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:51:56,538 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:51:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:51:56,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1188305858, now seen corresponding path program 22 times [2020-10-13 04:51:56,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:51:56,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1059637811] [2020-10-13 04:51:56,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:51:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:51:56,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:51:56,607 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:01,559 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:01,560 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 135 [2020-10-13 04:52:01,560 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:01,560 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5004 [2020-10-13 04:52:01,560 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:52:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:01,560 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:52:01,560 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:01,910 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:01,912 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:01,913 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:01,913 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:01,913 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:01,913 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:01,913 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:01,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:01,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:01,914 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:01,914 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:01,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1221 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 968 trivial. 0 not checked. [2020-10-13 04:52:01,922 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1059637811] [2020-10-13 04:52:01,922 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:01,922 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:52:01,922 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426737046] [2020-10-13 04:52:01,923 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:52:01,923 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:01,923 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:52:01,923 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:52:01,923 INFO L87 Difference]: Start difference. First operand 132 states and 135 transitions. Second operand 26 states. [2020-10-13 04:52:02,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:02,218 INFO L93 Difference]: Finished difference Result 242 states and 250 transitions. [2020-10-13 04:52:02,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:52:02,219 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 127 [2020-10-13 04:52:02,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:02,220 INFO L225 Difference]: With dead ends: 242 [2020-10-13 04:52:02,220 INFO L226 Difference]: Without dead ends: 139 [2020-10-13 04:52:02,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:52:02,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-13 04:52:02,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 137. [2020-10-13 04:52:02,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-13 04:52:02,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 140 transitions. [2020-10-13 04:52:02,227 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 140 transitions. Word has length 127 [2020-10-13 04:52:02,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:02,228 INFO L479 AbstractCegarLoop]: Abstraction has 137 states and 140 transitions. [2020-10-13 04:52:02,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:52:02,228 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 140 transitions. [2020-10-13 04:52:02,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2020-10-13 04:52:02,229 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:02,229 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:02,229 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:52:02,229 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:02,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:02,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1540310402, now seen corresponding path program 23 times [2020-10-13 04:52:02,230 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:02,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731408683] [2020-10-13 04:52:02,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:02,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:02,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:02,316 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:07,371 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:07,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 140 [2020-10-13 04:52:07,372 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:07,372 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5126 [2020-10-13 04:52:07,372 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 25 [2020-10-13 04:52:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:07,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 25 [2020-10-13 04:52:07,373 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:07,750 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:07,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:07,754 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:07,754 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:07,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:07,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:07,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:07,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:07,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:07,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:07,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:07,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:07,766 INFO L134 CoverageAnalysis]: Checked inductivity of 1334 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 1058 trivial. 0 not checked. [2020-10-13 04:52:07,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731408683] [2020-10-13 04:52:07,767 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:07,767 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-10-13 04:52:07,767 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371643087] [2020-10-13 04:52:07,768 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-10-13 04:52:07,768 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:07,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-10-13 04:52:07,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:52:07,769 INFO L87 Difference]: Start difference. First operand 137 states and 140 transitions. Second operand 27 states. [2020-10-13 04:52:08,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:08,157 INFO L93 Difference]: Finished difference Result 251 states and 259 transitions. [2020-10-13 04:52:08,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-13 04:52:08,159 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 132 [2020-10-13 04:52:08,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:08,160 INFO L225 Difference]: With dead ends: 251 [2020-10-13 04:52:08,160 INFO L226 Difference]: Without dead ends: 144 [2020-10-13 04:52:08,161 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2020-10-13 04:52:08,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-13 04:52:08,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 142. [2020-10-13 04:52:08,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:52:08,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 145 transitions. [2020-10-13 04:52:08,177 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 145 transitions. Word has length 132 [2020-10-13 04:52:08,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:08,177 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 145 transitions. [2020-10-13 04:52:08,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-10-13 04:52:08,177 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 145 transitions. [2020-10-13 04:52:08,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:52:08,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:08,179 INFO L422 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:08,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:52:08,182 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:08,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:08,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1193492038, now seen corresponding path program 24 times [2020-10-13 04:52:08,183 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:08,183 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248128018] [2020-10-13 04:52:08,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:08,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:08,288 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:13,332 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:13,332 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:52:13,332 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:13,332 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5125 [2020-10-13 04:52:13,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:13,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-10-13 04:52:13,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:13,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:52:13,333 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:13,719 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:13,720 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:13,722 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:13,722 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:13,722 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:13,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:52:13,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:13,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:13,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 1152 trivial. 0 not checked. [2020-10-13 04:52:13,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248128018] [2020-10-13 04:52:13,732 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:13,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28] total 28 [2020-10-13 04:52:13,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286944558] [2020-10-13 04:52:13,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 28 states [2020-10-13 04:52:13,733 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:13,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2020-10-13 04:52:13,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:52:13,734 INFO L87 Difference]: Start difference. First operand 142 states and 145 transitions. Second operand 28 states. [2020-10-13 04:52:14,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:14,118 INFO L93 Difference]: Finished difference Result 260 states and 268 transitions. [2020-10-13 04:52:14,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-13 04:52:14,119 INFO L78 Accepts]: Start accepts. Automaton has 28 states. Word has length 137 [2020-10-13 04:52:14,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:14,121 INFO L225 Difference]: With dead ends: 260 [2020-10-13 04:52:14,121 INFO L226 Difference]: Without dead ends: 149 [2020-10-13 04:52:14,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2020-10-13 04:52:14,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-13 04:52:14,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 147. [2020-10-13 04:52:14,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-13 04:52:14,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 150 transitions. [2020-10-13 04:52:14,129 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 150 transitions. Word has length 137 [2020-10-13 04:52:14,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:14,130 INFO L479 AbstractCegarLoop]: Abstraction has 147 states and 150 transitions. [2020-10-13 04:52:14,130 INFO L480 AbstractCegarLoop]: Interpolant automaton has 28 states. [2020-10-13 04:52:14,130 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 150 transitions. [2020-10-13 04:52:14,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2020-10-13 04:52:14,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:14,131 INFO L422 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:14,131 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:52:14,131 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:14,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:14,132 INFO L82 PathProgramCache]: Analyzing trace with hash -418850182, now seen corresponding path program 25 times [2020-10-13 04:52:14,132 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:14,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253565493] [2020-10-13 04:52:14,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:14,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:14,161 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:14,260 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:19,340 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:19,341 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 150 [2020-10-13 04:52:19,341 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:19,341 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5190 [2020-10-13 04:52:19,341 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 27 [2020-10-13 04:52:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:19,341 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 27 [2020-10-13 04:52:19,341 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:19,816 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:19,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:19,817 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:19,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:19,819 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:19,819 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:19,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:19,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:19,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:19,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:19,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:19,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:52:19,846 INFO L134 CoverageAnalysis]: Checked inductivity of 1575 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 1250 trivial. 0 not checked. [2020-10-13 04:52:19,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253565493] [2020-10-13 04:52:19,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:19,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-10-13 04:52:19,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910697740] [2020-10-13 04:52:19,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-10-13 04:52:19,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:19,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-10-13 04:52:19,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:52:19,852 INFO L87 Difference]: Start difference. First operand 147 states and 150 transitions. Second operand 29 states. [2020-10-13 04:52:20,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:20,151 INFO L93 Difference]: Finished difference Result 269 states and 277 transitions. [2020-10-13 04:52:20,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-13 04:52:20,152 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 142 [2020-10-13 04:52:20,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:20,153 INFO L225 Difference]: With dead ends: 269 [2020-10-13 04:52:20,154 INFO L226 Difference]: Without dead ends: 154 [2020-10-13 04:52:20,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2020-10-13 04:52:20,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-13 04:52:20,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 152. [2020-10-13 04:52:20,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:52:20,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 155 transitions. [2020-10-13 04:52:20,166 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 155 transitions. Word has length 142 [2020-10-13 04:52:20,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:20,166 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 155 transitions. [2020-10-13 04:52:20,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-10-13 04:52:20,166 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 155 transitions. [2020-10-13 04:52:20,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 04:52:20,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:20,169 INFO L422 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:20,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:52:20,169 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:20,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:20,170 INFO L82 PathProgramCache]: Analyzing trace with hash -779546702, now seen corresponding path program 26 times [2020-10-13 04:52:20,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:20,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [111587172] [2020-10-13 04:52:20,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:20,210 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:20,393 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:25,229 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:25,229 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 04:52:25,230 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:25,230 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5035 [2020-10-13 04:52:25,230 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-10-13 04:52:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:25,230 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:52:25,230 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:25,701 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:25,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:25,702 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:25,703 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:25,704 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:25,705 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:25,706 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:25,706 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:25,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:25,707 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:25,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:52:25,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1703 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 1352 trivial. 0 not checked. [2020-10-13 04:52:25,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [111587172] [2020-10-13 04:52:25,733 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:25,733 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30] total 30 [2020-10-13 04:52:25,733 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181593568] [2020-10-13 04:52:25,733 INFO L459 AbstractCegarLoop]: Interpolant automaton has 30 states [2020-10-13 04:52:25,734 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:25,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2020-10-13 04:52:25,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:52:25,735 INFO L87 Difference]: Start difference. First operand 152 states and 155 transitions. Second operand 30 states. [2020-10-13 04:52:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:26,191 INFO L93 Difference]: Finished difference Result 278 states and 286 transitions. [2020-10-13 04:52:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-13 04:52:26,191 INFO L78 Accepts]: Start accepts. Automaton has 30 states. Word has length 147 [2020-10-13 04:52:26,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:26,192 INFO L225 Difference]: With dead ends: 278 [2020-10-13 04:52:26,193 INFO L226 Difference]: Without dead ends: 159 [2020-10-13 04:52:26,193 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2020-10-13 04:52:26,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-13 04:52:26,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 157. [2020-10-13 04:52:26,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-13 04:52:26,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 160 transitions. [2020-10-13 04:52:26,200 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 160 transitions. Word has length 147 [2020-10-13 04:52:26,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:26,200 INFO L479 AbstractCegarLoop]: Abstraction has 157 states and 160 transitions. [2020-10-13 04:52:26,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 30 states. [2020-10-13 04:52:26,200 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 160 transitions. [2020-10-13 04:52:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2020-10-13 04:52:26,201 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:26,202 INFO L422 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:26,202 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:52:26,202 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:26,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:26,202 INFO L82 PathProgramCache]: Analyzing trace with hash -987736206, now seen corresponding path program 27 times [2020-10-13 04:52:26,202 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:26,203 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1215139217] [2020-10-13 04:52:26,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:26,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:26,229 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:26,322 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:31,353 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:31,353 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 160 [2020-10-13 04:52:31,353 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:31,354 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5131 [2020-10-13 04:52:31,354 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:31,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 29 [2020-10-13 04:52:31,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:31,354 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 29 [2020-10-13 04:52:31,354 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:32,004 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:32,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:32,006 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:32,007 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:32,007 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:32,007 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:32,008 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:32,008 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:32,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:32,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:32,008 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:32,008 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:32,036 INFO L134 CoverageAnalysis]: Checked inductivity of 1836 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1458 trivial. 0 not checked. [2020-10-13 04:52:32,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1215139217] [2020-10-13 04:52:32,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:32,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-10-13 04:52:32,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108710581] [2020-10-13 04:52:32,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-10-13 04:52:32,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:32,039 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-10-13 04:52:32,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:52:32,039 INFO L87 Difference]: Start difference. First operand 157 states and 160 transitions. Second operand 31 states. [2020-10-13 04:52:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:32,596 INFO L93 Difference]: Finished difference Result 287 states and 295 transitions. [2020-10-13 04:52:32,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-13 04:52:32,597 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 152 [2020-10-13 04:52:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:32,599 INFO L225 Difference]: With dead ends: 287 [2020-10-13 04:52:32,599 INFO L226 Difference]: Without dead ends: 164 [2020-10-13 04:52:32,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2020-10-13 04:52:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-13 04:52:32,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2020-10-13 04:52:32,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 04:52:32,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 165 transitions. [2020-10-13 04:52:32,609 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 165 transitions. Word has length 152 [2020-10-13 04:52:32,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:32,609 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 165 transitions. [2020-10-13 04:52:32,609 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-10-13 04:52:32,609 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 165 transitions. [2020-10-13 04:52:32,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 04:52:32,611 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:32,611 INFO L422 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:32,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:52:32,612 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:32,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:32,612 INFO L82 PathProgramCache]: Analyzing trace with hash 312018346, now seen corresponding path program 28 times [2020-10-13 04:52:32,613 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:32,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [178629458] [2020-10-13 04:52:32,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:32,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:32,659 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:32,747 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:37,696 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:37,697 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 04:52:37,697 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:37,697 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 04:52:37,697 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:37,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-10-13 04:52:37,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:37,697 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:52:37,698 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:38,325 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:38,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:38,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:38,328 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:38,328 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:38,328 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:38,328 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:38,328 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:38,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:38,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:38,329 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:38,329 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:38,353 INFO L134 CoverageAnalysis]: Checked inductivity of 1974 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 1568 trivial. 0 not checked. [2020-10-13 04:52:38,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [178629458] [2020-10-13 04:52:38,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:38,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32] total 32 [2020-10-13 04:52:38,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601187455] [2020-10-13 04:52:38,354 INFO L459 AbstractCegarLoop]: Interpolant automaton has 32 states [2020-10-13 04:52:38,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:38,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2020-10-13 04:52:38,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:52:38,355 INFO L87 Difference]: Start difference. First operand 162 states and 165 transitions. Second operand 32 states. [2020-10-13 04:52:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:38,842 INFO L93 Difference]: Finished difference Result 296 states and 304 transitions. [2020-10-13 04:52:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-13 04:52:38,843 INFO L78 Accepts]: Start accepts. Automaton has 32 states. Word has length 157 [2020-10-13 04:52:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:38,844 INFO L225 Difference]: With dead ends: 296 [2020-10-13 04:52:38,844 INFO L226 Difference]: Without dead ends: 169 [2020-10-13 04:52:38,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2020-10-13 04:52:38,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-13 04:52:38,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2020-10-13 04:52:38,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-13 04:52:38,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 170 transitions. [2020-10-13 04:52:38,852 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 170 transitions. Word has length 157 [2020-10-13 04:52:38,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:38,853 INFO L479 AbstractCegarLoop]: Abstraction has 167 states and 170 transitions. [2020-10-13 04:52:38,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 32 states. [2020-10-13 04:52:38,853 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 170 transitions. [2020-10-13 04:52:38,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2020-10-13 04:52:38,854 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:38,854 INFO L422 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:38,854 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:52:38,855 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:38,855 INFO L82 PathProgramCache]: Analyzing trace with hash -2029667222, now seen corresponding path program 29 times [2020-10-13 04:52:38,855 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:38,855 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383984302] [2020-10-13 04:52:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:38,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:38,889 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:39,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:43,903 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:43,904 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 170 [2020-10-13 04:52:43,904 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:43,904 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5026 [2020-10-13 04:52:43,904 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 31 [2020-10-13 04:52:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:43,904 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 31 [2020-10-13 04:52:43,904 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:44,497 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:44,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:44,498 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:44,499 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:44,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:44,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:44,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:44,500 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:44,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:44,500 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:44,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:44,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:44,518 INFO L134 CoverageAnalysis]: Checked inductivity of 2117 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 1682 trivial. 0 not checked. [2020-10-13 04:52:44,519 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383984302] [2020-10-13 04:52:44,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:44,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-10-13 04:52:44,519 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405395999] [2020-10-13 04:52:44,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-10-13 04:52:44,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:44,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-10-13 04:52:44,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:52:44,521 INFO L87 Difference]: Start difference. First operand 167 states and 170 transitions. Second operand 33 states. [2020-10-13 04:52:44,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:44,912 INFO L93 Difference]: Finished difference Result 305 states and 313 transitions. [2020-10-13 04:52:44,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-13 04:52:44,913 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 162 [2020-10-13 04:52:44,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:44,914 INFO L225 Difference]: With dead ends: 305 [2020-10-13 04:52:44,915 INFO L226 Difference]: Without dead ends: 174 [2020-10-13 04:52:44,916 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2020-10-13 04:52:44,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-13 04:52:44,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 172. [2020-10-13 04:52:44,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-13 04:52:44,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 175 transitions. [2020-10-13 04:52:44,928 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 175 transitions. Word has length 162 [2020-10-13 04:52:44,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:44,928 INFO L479 AbstractCegarLoop]: Abstraction has 172 states and 175 transitions. [2020-10-13 04:52:44,928 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-10-13 04:52:44,928 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 175 transitions. [2020-10-13 04:52:44,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2020-10-13 04:52:44,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:44,930 INFO L422 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:44,930 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:52:44,931 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:44,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:44,931 INFO L82 PathProgramCache]: Analyzing trace with hash 332178338, now seen corresponding path program 30 times [2020-10-13 04:52:44,932 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:44,932 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1873373853] [2020-10-13 04:52:44,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:44,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:44,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:45,087 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:50,094 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:50,095 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 175 [2020-10-13 04:52:50,095 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:50,095 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5132 [2020-10-13 04:52:50,095 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-10-13 04:52:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:50,095 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:52:50,096 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:50,668 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:50,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:50,670 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:50,671 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:50,671 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:50,671 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:50,671 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:52:50,671 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:50,672 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:50,672 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:50,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2265 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 1800 trivial. 0 not checked. [2020-10-13 04:52:50,685 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1873373853] [2020-10-13 04:52:50,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:50,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34] total 34 [2020-10-13 04:52:50,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673925610] [2020-10-13 04:52:50,685 INFO L459 AbstractCegarLoop]: Interpolant automaton has 34 states [2020-10-13 04:52:50,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:50,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2020-10-13 04:52:50,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:52:50,686 INFO L87 Difference]: Start difference. First operand 172 states and 175 transitions. Second operand 34 states. [2020-10-13 04:52:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:51,088 INFO L93 Difference]: Finished difference Result 314 states and 322 transitions. [2020-10-13 04:52:51,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-13 04:52:51,088 INFO L78 Accepts]: Start accepts. Automaton has 34 states. Word has length 167 [2020-10-13 04:52:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:51,090 INFO L225 Difference]: With dead ends: 314 [2020-10-13 04:52:51,090 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:52:51,091 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2020-10-13 04:52:51,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:52:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 177. [2020-10-13 04:52:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 177 states. [2020-10-13 04:52:51,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 180 transitions. [2020-10-13 04:52:51,097 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 180 transitions. Word has length 167 [2020-10-13 04:52:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:51,098 INFO L479 AbstractCegarLoop]: Abstraction has 177 states and 180 transitions. [2020-10-13 04:52:51,098 INFO L480 AbstractCegarLoop]: Interpolant automaton has 34 states. [2020-10-13 04:52:51,098 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 180 transitions. [2020-10-13 04:52:51,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2020-10-13 04:52:51,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:51,099 INFO L422 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:51,099 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:52:51,099 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:51,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:51,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1750529694, now seen corresponding path program 31 times [2020-10-13 04:52:51,100 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:51,100 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1221364220] [2020-10-13 04:52:51,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:51,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:51,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:51,250 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:56,263 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:56,264 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 180 [2020-10-13 04:52:56,264 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:52:56,264 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5144 [2020-10-13 04:52:56,264 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:56,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 33 [2020-10-13 04:52:56,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:52:56,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 33 [2020-10-13 04:52:56,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:56,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:52:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:56,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:56,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:52:56,881 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:52:56,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:52:56,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 0 [2020-10-13 04:52:56,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:52:56,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:52:56,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:52:56,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:52:56,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:52:56,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2418 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 1922 trivial. 0 not checked. [2020-10-13 04:52:56,895 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1221364220] [2020-10-13 04:52:56,895 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:52:56,895 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-10-13 04:52:56,895 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767668975] [2020-10-13 04:52:56,895 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-10-13 04:52:56,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:52:56,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-10-13 04:52:56,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:52:56,897 INFO L87 Difference]: Start difference. First operand 177 states and 180 transitions. Second operand 35 states. [2020-10-13 04:52:57,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:52:57,397 INFO L93 Difference]: Finished difference Result 323 states and 331 transitions. [2020-10-13 04:52:57,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-13 04:52:57,397 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 172 [2020-10-13 04:52:57,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:52:57,398 INFO L225 Difference]: With dead ends: 323 [2020-10-13 04:52:57,399 INFO L226 Difference]: Without dead ends: 184 [2020-10-13 04:52:57,400 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2020-10-13 04:52:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-13 04:52:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 182. [2020-10-13 04:52:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 182 states. [2020-10-13 04:52:57,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 185 transitions. [2020-10-13 04:52:57,407 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 185 transitions. Word has length 172 [2020-10-13 04:52:57,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:52:57,407 INFO L479 AbstractCegarLoop]: Abstraction has 182 states and 185 transitions. [2020-10-13 04:52:57,407 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-10-13 04:52:57,407 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 185 transitions. [2020-10-13 04:52:57,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2020-10-13 04:52:57,408 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:52:57,409 INFO L422 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:52:57,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:52:57,409 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:52:57,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:52:57,409 INFO L82 PathProgramCache]: Analyzing trace with hash 48490906, now seen corresponding path program 32 times [2020-10-13 04:52:57,410 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:52:57,410 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350878178] [2020-10-13 04:52:57,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:52:57,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:52:57,443 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:52:57,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:02,532 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:02,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 185 [2020-10-13 04:53:02,533 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:02,533 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5102 [2020-10-13 04:53:02,533 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:02,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-10-13 04:53:02,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:02,533 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:53:02,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:03,175 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:03,177 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:03,177 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:03,178 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:03,178 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:03,178 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:03,178 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:03,178 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:03,179 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:03,179 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:03,197 INFO L134 CoverageAnalysis]: Checked inductivity of 2576 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 2048 trivial. 0 not checked. [2020-10-13 04:53:03,198 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350878178] [2020-10-13 04:53:03,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:03,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36] total 36 [2020-10-13 04:53:03,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265189763] [2020-10-13 04:53:03,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 36 states [2020-10-13 04:53:03,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:03,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2020-10-13 04:53:03,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:53:03,200 INFO L87 Difference]: Start difference. First operand 182 states and 185 transitions. Second operand 36 states. [2020-10-13 04:53:03,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:03,723 INFO L93 Difference]: Finished difference Result 332 states and 340 transitions. [2020-10-13 04:53:03,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-13 04:53:03,725 INFO L78 Accepts]: Start accepts. Automaton has 36 states. Word has length 177 [2020-10-13 04:53:03,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:03,727 INFO L225 Difference]: With dead ends: 332 [2020-10-13 04:53:03,727 INFO L226 Difference]: Without dead ends: 189 [2020-10-13 04:53:03,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2020-10-13 04:53:03,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-13 04:53:03,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2020-10-13 04:53:03,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2020-10-13 04:53:03,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 190 transitions. [2020-10-13 04:53:03,735 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 190 transitions. Word has length 177 [2020-10-13 04:53:03,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:03,735 INFO L479 AbstractCegarLoop]: Abstraction has 187 states and 190 transitions. [2020-10-13 04:53:03,735 INFO L480 AbstractCegarLoop]: Interpolant automaton has 36 states. [2020-10-13 04:53:03,735 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 190 transitions. [2020-10-13 04:53:03,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2020-10-13 04:53:03,736 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:03,737 INFO L422 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:03,737 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:53:03,737 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1141227942, now seen corresponding path program 33 times [2020-10-13 04:53:03,738 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:03,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815971526] [2020-10-13 04:53:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:03,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:03,759 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:03,888 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:09,302 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:09,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 190 [2020-10-13 04:53:09,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:09,303 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5551 [2020-10-13 04:53:09,303 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:09,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 35 [2020-10-13 04:53:09,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:09,303 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 35 [2020-10-13 04:53:09,303 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:09,976 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:09,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:09,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:09,979 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:09,979 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:09,979 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:09,979 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:09,979 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:09,979 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:09,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:09,980 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:09,980 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2739 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 2178 trivial. 0 not checked. [2020-10-13 04:53:09,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815971526] [2020-10-13 04:53:09,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:09,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-10-13 04:53:09,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835732396] [2020-10-13 04:53:09,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-10-13 04:53:09,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:09,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-10-13 04:53:09,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:53:09,996 INFO L87 Difference]: Start difference. First operand 187 states and 190 transitions. Second operand 37 states. [2020-10-13 04:53:10,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:10,596 INFO L93 Difference]: Finished difference Result 341 states and 349 transitions. [2020-10-13 04:53:10,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-13 04:53:10,596 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 182 [2020-10-13 04:53:10,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:10,598 INFO L225 Difference]: With dead ends: 341 [2020-10-13 04:53:10,598 INFO L226 Difference]: Without dead ends: 194 [2020-10-13 04:53:10,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2020-10-13 04:53:10,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-13 04:53:10,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 192. [2020-10-13 04:53:10,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:53:10,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 195 transitions. [2020-10-13 04:53:10,610 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 195 transitions. Word has length 182 [2020-10-13 04:53:10,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:10,610 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 195 transitions. [2020-10-13 04:53:10,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-10-13 04:53:10,611 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 195 transitions. [2020-10-13 04:53:10,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 04:53:10,612 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:10,613 INFO L422 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:10,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:53:10,613 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:10,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:10,614 INFO L82 PathProgramCache]: Analyzing trace with hash 597612434, now seen corresponding path program 34 times [2020-10-13 04:53:10,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:10,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1359716983] [2020-10-13 04:53:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:10,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:10,664 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:10,967 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:15,758 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:15,758 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 04:53:15,758 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:15,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5110 [2020-10-13 04:53:15,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-10-13 04:53:15,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:15,759 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:53:15,759 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:16,498 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:16,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:16,500 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:16,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:16,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:16,501 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:16,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:16,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:16,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:16,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2907 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 2312 trivial. 0 not checked. [2020-10-13 04:53:16,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1359716983] [2020-10-13 04:53:16,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:16,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38] total 38 [2020-10-13 04:53:16,516 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27913046] [2020-10-13 04:53:16,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 38 states [2020-10-13 04:53:16,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:16,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2020-10-13 04:53:16,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:53:16,518 INFO L87 Difference]: Start difference. First operand 192 states and 195 transitions. Second operand 38 states. [2020-10-13 04:53:17,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:17,007 INFO L93 Difference]: Finished difference Result 350 states and 358 transitions. [2020-10-13 04:53:17,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-13 04:53:17,008 INFO L78 Accepts]: Start accepts. Automaton has 38 states. Word has length 187 [2020-10-13 04:53:17,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:17,009 INFO L225 Difference]: With dead ends: 350 [2020-10-13 04:53:17,009 INFO L226 Difference]: Without dead ends: 199 [2020-10-13 04:53:17,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2020-10-13 04:53:17,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-13 04:53:17,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 197. [2020-10-13 04:53:17,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 197 states. [2020-10-13 04:53:17,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 200 transitions. [2020-10-13 04:53:17,017 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 200 transitions. Word has length 187 [2020-10-13 04:53:17,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:17,017 INFO L479 AbstractCegarLoop]: Abstraction has 197 states and 200 transitions. [2020-10-13 04:53:17,017 INFO L480 AbstractCegarLoop]: Interpolant automaton has 38 states. [2020-10-13 04:53:17,017 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 200 transitions. [2020-10-13 04:53:17,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2020-10-13 04:53:17,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:17,019 INFO L422 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:17,019 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:53:17,019 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:17,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:17,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1830200494, now seen corresponding path program 35 times [2020-10-13 04:53:17,020 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:17,020 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1638760472] [2020-10-13 04:53:17,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:17,055 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:17,313 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:22,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:22,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 200 [2020-10-13 04:53:22,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:22,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5078 [2020-10-13 04:53:22,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 37 [2020-10-13 04:53:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:22,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 37 [2020-10-13 04:53:22,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:22,877 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:22,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:22,879 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:22,880 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:22,880 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:22,881 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:22,881 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:22,881 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:22,881 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:22,882 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 3080 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 2450 trivial. 0 not checked. [2020-10-13 04:53:22,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1638760472] [2020-10-13 04:53:22,898 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:22,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-10-13 04:53:22,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946965097] [2020-10-13 04:53:22,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-10-13 04:53:22,899 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:22,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-10-13 04:53:22,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:53:22,900 INFO L87 Difference]: Start difference. First operand 197 states and 200 transitions. Second operand 39 states. [2020-10-13 04:53:23,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:23,385 INFO L93 Difference]: Finished difference Result 359 states and 367 transitions. [2020-10-13 04:53:23,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-13 04:53:23,386 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 192 [2020-10-13 04:53:23,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:23,388 INFO L225 Difference]: With dead ends: 359 [2020-10-13 04:53:23,388 INFO L226 Difference]: Without dead ends: 204 [2020-10-13 04:53:23,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2020-10-13 04:53:23,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-13 04:53:23,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 202. [2020-10-13 04:53:23,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 202 states. [2020-10-13 04:53:23,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 205 transitions. [2020-10-13 04:53:23,397 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 205 transitions. Word has length 192 [2020-10-13 04:53:23,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:23,397 INFO L479 AbstractCegarLoop]: Abstraction has 202 states and 205 transitions. [2020-10-13 04:53:23,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-10-13 04:53:23,397 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 205 transitions. [2020-10-13 04:53:23,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2020-10-13 04:53:23,399 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:23,399 INFO L422 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:23,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:53:23,399 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:23,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:23,400 INFO L82 PathProgramCache]: Analyzing trace with hash 1337814410, now seen corresponding path program 36 times [2020-10-13 04:53:23,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:23,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383564441] [2020-10-13 04:53:23,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:23,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:23,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:23,590 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:28,648 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:28,649 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 205 [2020-10-13 04:53:28,649 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:28,649 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5227 [2020-10-13 04:53:28,649 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-10-13 04:53:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:28,649 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:53:28,649 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:29,471 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:29,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:29,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:29,475 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:29,475 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:29,475 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:29,476 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:29,476 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:29,476 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:29,476 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:29,492 INFO L134 CoverageAnalysis]: Checked inductivity of 3258 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 2592 trivial. 0 not checked. [2020-10-13 04:53:29,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383564441] [2020-10-13 04:53:29,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:29,493 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40] total 40 [2020-10-13 04:53:29,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865662067] [2020-10-13 04:53:29,493 INFO L459 AbstractCegarLoop]: Interpolant automaton has 40 states [2020-10-13 04:53:29,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:29,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2020-10-13 04:53:29,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:53:29,494 INFO L87 Difference]: Start difference. First operand 202 states and 205 transitions. Second operand 40 states. [2020-10-13 04:53:30,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:30,061 INFO L93 Difference]: Finished difference Result 368 states and 376 transitions. [2020-10-13 04:53:30,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-13 04:53:30,061 INFO L78 Accepts]: Start accepts. Automaton has 40 states. Word has length 197 [2020-10-13 04:53:30,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:30,063 INFO L225 Difference]: With dead ends: 368 [2020-10-13 04:53:30,063 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 04:53:30,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2020-10-13 04:53:30,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 04:53:30,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 207. [2020-10-13 04:53:30,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 207 states. [2020-10-13 04:53:30,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 210 transitions. [2020-10-13 04:53:30,070 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 210 transitions. Word has length 197 [2020-10-13 04:53:30,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:30,070 INFO L479 AbstractCegarLoop]: Abstraction has 207 states and 210 transitions. [2020-10-13 04:53:30,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 40 states. [2020-10-13 04:53:30,071 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 210 transitions. [2020-10-13 04:53:30,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2020-10-13 04:53:30,072 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:30,072 INFO L422 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:30,072 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:53:30,072 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:30,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:30,073 INFO L82 PathProgramCache]: Analyzing trace with hash 359030858, now seen corresponding path program 37 times [2020-10-13 04:53:30,073 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:30,073 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567581202] [2020-10-13 04:53:30,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:30,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:30,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:30,221 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:35,193 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:35,194 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 210 [2020-10-13 04:53:35,194 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:35,194 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5099 [2020-10-13 04:53:35,194 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:35,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 39 [2020-10-13 04:53:35,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:35,194 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-10-13 04:53:35,195 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:36,043 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:36,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:36,045 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:36,046 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:36,046 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:36,047 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:36,047 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:36,047 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:36,047 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:36,047 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:36,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3441 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 2738 trivial. 0 not checked. [2020-10-13 04:53:36,064 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567581202] [2020-10-13 04:53:36,064 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:36,064 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-10-13 04:53:36,064 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627621891] [2020-10-13 04:53:36,065 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-10-13 04:53:36,065 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:36,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-10-13 04:53:36,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:53:36,066 INFO L87 Difference]: Start difference. First operand 207 states and 210 transitions. Second operand 41 states. [2020-10-13 04:53:36,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:36,542 INFO L93 Difference]: Finished difference Result 377 states and 385 transitions. [2020-10-13 04:53:36,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-13 04:53:36,542 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 202 [2020-10-13 04:53:36,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:36,544 INFO L225 Difference]: With dead ends: 377 [2020-10-13 04:53:36,544 INFO L226 Difference]: Without dead ends: 214 [2020-10-13 04:53:36,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2020-10-13 04:53:36,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2020-10-13 04:53:36,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 212. [2020-10-13 04:53:36,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 212 states. [2020-10-13 04:53:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 215 transitions. [2020-10-13 04:53:36,552 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 215 transitions. Word has length 202 [2020-10-13 04:53:36,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:36,553 INFO L479 AbstractCegarLoop]: Abstraction has 212 states and 215 transitions. [2020-10-13 04:53:36,553 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-10-13 04:53:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 215 transitions. [2020-10-13 04:53:36,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2020-10-13 04:53:36,554 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:36,554 INFO L422 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:36,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:53:36,555 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1996467074, now seen corresponding path program 38 times [2020-10-13 04:53:36,555 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:36,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144555767] [2020-10-13 04:53:36,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:36,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:36,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:41,790 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:41,791 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 215 [2020-10-13 04:53:41,791 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:41,791 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5204 [2020-10-13 04:53:41,791 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-10-13 04:53:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:41,791 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:53:41,792 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:42,697 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:42,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:42,699 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:42,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:42,700 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:42,700 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:42,700 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:42,700 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:42,701 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:42,701 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:42,719 INFO L134 CoverageAnalysis]: Checked inductivity of 3629 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 2888 trivial. 0 not checked. [2020-10-13 04:53:42,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144555767] [2020-10-13 04:53:42,719 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:42,719 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42] total 42 [2020-10-13 04:53:42,719 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222354406] [2020-10-13 04:53:42,720 INFO L459 AbstractCegarLoop]: Interpolant automaton has 42 states [2020-10-13 04:53:42,720 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:42,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2020-10-13 04:53:42,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:53:42,721 INFO L87 Difference]: Start difference. First operand 212 states and 215 transitions. Second operand 42 states. [2020-10-13 04:53:43,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:43,220 INFO L93 Difference]: Finished difference Result 386 states and 394 transitions. [2020-10-13 04:53:43,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-13 04:53:43,220 INFO L78 Accepts]: Start accepts. Automaton has 42 states. Word has length 207 [2020-10-13 04:53:43,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:43,222 INFO L225 Difference]: With dead ends: 386 [2020-10-13 04:53:43,222 INFO L226 Difference]: Without dead ends: 219 [2020-10-13 04:53:43,224 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2020-10-13 04:53:43,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-13 04:53:43,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 217. [2020-10-13 04:53:43,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 217 states. [2020-10-13 04:53:43,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 220 transitions. [2020-10-13 04:53:43,231 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 220 transitions. Word has length 207 [2020-10-13 04:53:43,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:43,231 INFO L479 AbstractCegarLoop]: Abstraction has 217 states and 220 transitions. [2020-10-13 04:53:43,231 INFO L480 AbstractCegarLoop]: Interpolant automaton has 42 states. [2020-10-13 04:53:43,231 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 220 transitions. [2020-10-13 04:53:43,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2020-10-13 04:53:43,232 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:43,233 INFO L422 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:43,233 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:53:43,233 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:43,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:43,233 INFO L82 PathProgramCache]: Analyzing trace with hash 375475522, now seen corresponding path program 39 times [2020-10-13 04:53:43,234 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:43,234 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [40479288] [2020-10-13 04:53:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:43,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:43,270 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:43,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:48,370 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:48,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 220 [2020-10-13 04:53:48,371 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:48,371 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5114 [2020-10-13 04:53:48,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 41 [2020-10-13 04:53:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:48,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-10-13 04:53:48,371 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:49,316 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:49,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:49,318 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:49,319 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:49,319 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:49,319 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:49,319 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:49,319 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:49,319 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:49,320 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 3822 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 3042 trivial. 0 not checked. [2020-10-13 04:53:49,338 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [40479288] [2020-10-13 04:53:49,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:49,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-10-13 04:53:49,339 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060623560] [2020-10-13 04:53:49,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-10-13 04:53:49,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:49,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-10-13 04:53:49,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:53:49,340 INFO L87 Difference]: Start difference. First operand 217 states and 220 transitions. Second operand 43 states. [2020-10-13 04:53:49,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:49,955 INFO L93 Difference]: Finished difference Result 395 states and 403 transitions. [2020-10-13 04:53:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-13 04:53:49,956 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 212 [2020-10-13 04:53:49,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:49,958 INFO L225 Difference]: With dead ends: 395 [2020-10-13 04:53:49,958 INFO L226 Difference]: Without dead ends: 224 [2020-10-13 04:53:49,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2020-10-13 04:53:49,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-13 04:53:49,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 222. [2020-10-13 04:53:49,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 222 states. [2020-10-13 04:53:49,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 225 transitions. [2020-10-13 04:53:49,966 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 225 transitions. Word has length 212 [2020-10-13 04:53:49,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:49,966 INFO L479 AbstractCegarLoop]: Abstraction has 222 states and 225 transitions. [2020-10-13 04:53:49,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-10-13 04:53:49,967 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 225 transitions. [2020-10-13 04:53:49,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2020-10-13 04:53:49,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:49,968 INFO L422 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:49,968 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:53:49,968 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:49,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:49,969 INFO L82 PathProgramCache]: Analyzing trace with hash 522555770, now seen corresponding path program 40 times [2020-10-13 04:53:49,969 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:49,969 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1478473337] [2020-10-13 04:53:49,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:49,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:50,011 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:50,101 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:55,003 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:55,003 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 225 [2020-10-13 04:53:55,003 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:53:55,004 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:53:55,004 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-10-13 04:53:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:53:55,004 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:53:55,004 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:55,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:53:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:55,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:55,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:53:55,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:53:55,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:53:55,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:53:55,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:53:55,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:53:55,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:53:55,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:53:55,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:53:56,011 INFO L134 CoverageAnalysis]: Checked inductivity of 4020 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 3200 trivial. 0 not checked. [2020-10-13 04:53:56,012 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1478473337] [2020-10-13 04:53:56,012 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:53:56,012 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44] total 44 [2020-10-13 04:53:56,012 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849896716] [2020-10-13 04:53:56,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 44 states [2020-10-13 04:53:56,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:53:56,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2020-10-13 04:53:56,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:53:56,014 INFO L87 Difference]: Start difference. First operand 222 states and 225 transitions. Second operand 44 states. [2020-10-13 04:53:56,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:53:56,578 INFO L93 Difference]: Finished difference Result 404 states and 412 transitions. [2020-10-13 04:53:56,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-13 04:53:56,578 INFO L78 Accepts]: Start accepts. Automaton has 44 states. Word has length 217 [2020-10-13 04:53:56,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:53:56,579 INFO L225 Difference]: With dead ends: 404 [2020-10-13 04:53:56,580 INFO L226 Difference]: Without dead ends: 229 [2020-10-13 04:53:56,580 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2020-10-13 04:53:56,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-13 04:53:56,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2020-10-13 04:53:56,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 227 states. [2020-10-13 04:53:56,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 230 transitions. [2020-10-13 04:53:56,585 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 230 transitions. Word has length 217 [2020-10-13 04:53:56,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:53:56,586 INFO L479 AbstractCegarLoop]: Abstraction has 227 states and 230 transitions. [2020-10-13 04:53:56,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 44 states. [2020-10-13 04:53:56,586 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 230 transitions. [2020-10-13 04:53:56,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2020-10-13 04:53:56,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:53:56,587 INFO L422 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:53:56,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:53:56,588 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:53:56,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:53:56,588 INFO L82 PathProgramCache]: Analyzing trace with hash -1026940358, now seen corresponding path program 41 times [2020-10-13 04:53:56,588 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:53:56,589 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [306996568] [2020-10-13 04:53:56,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:53:56,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:53:56,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:53:56,811 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:01,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:01,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 230 [2020-10-13 04:54:01,716 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:01,716 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5105 [2020-10-13 04:54:01,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 43 [2020-10-13 04:54:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:01,717 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 43 [2020-10-13 04:54:01,717 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:02,754 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:02,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:02,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:02,757 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:02,757 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:02,757 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:02,758 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:02,758 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:02,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:02,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:02,758 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:02,758 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:02,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4223 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 3362 trivial. 0 not checked. [2020-10-13 04:54:02,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [306996568] [2020-10-13 04:54:02,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:02,779 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-10-13 04:54:02,779 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037577070] [2020-10-13 04:54:02,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-10-13 04:54:02,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:02,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-10-13 04:54:02,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:54:02,781 INFO L87 Difference]: Start difference. First operand 227 states and 230 transitions. Second operand 45 states. [2020-10-13 04:54:03,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:03,389 INFO L93 Difference]: Finished difference Result 413 states and 421 transitions. [2020-10-13 04:54:03,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-10-13 04:54:03,390 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 222 [2020-10-13 04:54:03,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:03,392 INFO L225 Difference]: With dead ends: 413 [2020-10-13 04:54:03,392 INFO L226 Difference]: Without dead ends: 234 [2020-10-13 04:54:03,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2020-10-13 04:54:03,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-13 04:54:03,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 232. [2020-10-13 04:54:03,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 232 states. [2020-10-13 04:54:03,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 235 transitions. [2020-10-13 04:54:03,401 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 235 transitions. Word has length 222 [2020-10-13 04:54:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:03,401 INFO L479 AbstractCegarLoop]: Abstraction has 232 states and 235 transitions. [2020-10-13 04:54:03,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-10-13 04:54:03,401 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 235 transitions. [2020-10-13 04:54:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2020-10-13 04:54:03,403 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:03,403 INFO L422 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:03,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:54:03,403 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:03,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:03,404 INFO L82 PathProgramCache]: Analyzing trace with hash -470868110, now seen corresponding path program 42 times [2020-10-13 04:54:03,404 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:03,404 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635272221] [2020-10-13 04:54:03,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:03,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:03,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:03,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:08,802 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:08,802 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 235 [2020-10-13 04:54:08,802 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-10-13 04:54:08,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5374 [2020-10-13 04:54:08,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:08,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-10-13 04:54:08,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:54:08,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:54:08,803 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:09,879 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:54:09,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:09,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:54:09,882 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:54:09,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:54:09,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:54:09,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:54:09,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:54:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:54:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:54:09,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:54:09,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:54:09,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4431 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 3528 trivial. 0 not checked. [2020-10-13 04:54:09,903 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635272221] [2020-10-13 04:54:09,903 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:54:09,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46] total 46 [2020-10-13 04:54:09,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449116411] [2020-10-13 04:54:09,904 INFO L459 AbstractCegarLoop]: Interpolant automaton has 46 states [2020-10-13 04:54:09,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:54:09,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2020-10-13 04:54:09,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:54:09,905 INFO L87 Difference]: Start difference. First operand 232 states and 235 transitions. Second operand 46 states. [2020-10-13 04:54:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:54:10,669 INFO L93 Difference]: Finished difference Result 422 states and 430 transitions. [2020-10-13 04:54:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2020-10-13 04:54:10,669 INFO L78 Accepts]: Start accepts. Automaton has 46 states. Word has length 227 [2020-10-13 04:54:10,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:54:10,671 INFO L225 Difference]: With dead ends: 422 [2020-10-13 04:54:10,671 INFO L226 Difference]: Without dead ends: 239 [2020-10-13 04:54:10,672 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2020-10-13 04:54:10,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-13 04:54:10,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 237. [2020-10-13 04:54:10,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 237 states. [2020-10-13 04:54:10,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 240 transitions. [2020-10-13 04:54:10,678 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 240 transitions. Word has length 227 [2020-10-13 04:54:10,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:54:10,679 INFO L479 AbstractCegarLoop]: Abstraction has 237 states and 240 transitions. [2020-10-13 04:54:10,679 INFO L480 AbstractCegarLoop]: Interpolant automaton has 46 states. [2020-10-13 04:54:10,679 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 240 transitions. [2020-10-13 04:54:10,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2020-10-13 04:54:10,680 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:54:10,680 INFO L422 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:54:10,681 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:54:10,681 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:54:10,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:54:10,681 INFO L82 PathProgramCache]: Analyzing trace with hash 563142450, now seen corresponding path program 43 times [2020-10-13 04:54:10,681 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:54:10,681 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1292494658] [2020-10-13 04:54:10,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:54:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:54:10,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking...