/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_copy3_ground-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-adbd35c [2020-10-13 04:46:01,614 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-13 04:46:01,620 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-13 04:46:01,657 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-13 04:46:01,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-13 04:46:01,666 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-13 04:46:01,668 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-13 04:46:01,671 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-13 04:46:01,674 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-13 04:46:01,677 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-13 04:46:01,678 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-13 04:46:01,679 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-13 04:46:01,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-13 04:46:01,682 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-13 04:46:01,686 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-13 04:46:01,688 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-13 04:46:01,689 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-13 04:46:01,690 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-13 04:46:01,691 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-13 04:46:01,700 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-13 04:46:01,702 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-13 04:46:01,703 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-13 04:46:01,704 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-13 04:46:01,705 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-13 04:46:01,717 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-13 04:46:01,717 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-13 04:46:01,718 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-13 04:46:01,721 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-13 04:46:01,721 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-13 04:46:01,722 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-13 04:46:01,722 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-13 04:46:01,723 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-13 04:46:01,727 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-13 04:46:01,727 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-13 04:46:01,732 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-13 04:46:01,732 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-13 04:46:01,732 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-13 04:46:01,733 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-13 04:46:01,735 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-13 04:46:01,737 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-13 04:46:01,737 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-13 04:46:01,739 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 04:46:01,775 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-13 04:46:01,776 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-13 04:46:01,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-13 04:46:01,778 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-13 04:46:01,778 INFO L138 SettingsManager]: * Use SBE=true [2020-10-13 04:46:01,778 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-13 04:46:01,779 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-13 04:46:01,779 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-13 04:46:01,779 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-13 04:46:01,779 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-13 04:46:01,780 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-13 04:46:01,780 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-13 04:46:01,781 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-13 04:46:01,781 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-13 04:46:01,781 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-13 04:46:01,781 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-13 04:46:01,782 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-13 04:46:01,782 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-13 04:46:01,782 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-13 04:46:01,782 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-13 04:46:01,783 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-13 04:46:01,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-13 04:46:01,783 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-13 04:46:01,783 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-13 04:46:01,783 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-13 04:46:01,784 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-13 04:46:01,784 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-13 04:46:01,784 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-13 04:46:01,784 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-13 04:46:01,784 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 04:46:02,107 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-13 04:46:02,121 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-13 04:46:02,125 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-13 04:46:02,127 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-13 04:46:02,127 INFO L275 PluginConnector]: CDTParser initialized [2020-10-13 04:46:02,128 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-13 04:46:02,188 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90c8ed073/df4f2dba07704e318f2edffa712e64e1/FLAG766a23381 [2020-10-13 04:46:02,622 INFO L306 CDTParser]: Found 1 translation units. [2020-10-13 04:46:02,623 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/array-examples/standard_copy3_ground-2.i [2020-10-13 04:46:02,628 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90c8ed073/df4f2dba07704e318f2edffa712e64e1/FLAG766a23381 [2020-10-13 04:46:03,020 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/90c8ed073/df4f2dba07704e318f2edffa712e64e1 [2020-10-13 04:46:03,028 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-13 04:46:03,030 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-10-13 04:46:03,031 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:03,031 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-13 04:46:03,035 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-13 04:46:03,036 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,039 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fb66ff0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03, skipping insertion in model container [2020-10-13 04:46:03,039 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,046 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-13 04:46:03,064 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-13 04:46:03,267 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:03,273 INFO L203 MainTranslator]: Completed pre-run [2020-10-13 04:46:03,316 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-13 04:46:03,337 INFO L208 MainTranslator]: Completed translation [2020-10-13 04:46:03,339 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03 WrapperNode [2020-10-13 04:46:03,339 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-13 04:46:03,341 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-13 04:46:03,341 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-13 04:46:03,341 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-13 04:46:03,429 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,429 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,437 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,438 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,454 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,460 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (1/1) ... [2020-10-13 04:46:03,464 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-13 04:46:03,464 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-13 04:46:03,464 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-13 04:46:03,465 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-13 04:46:03,465 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (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 04:46:03,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-10-13 04:46:03,521 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-13 04:46:03,521 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-10-13 04:46:03,521 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-10-13 04:46:03,521 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-10-13 04:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-10-13 04:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-10-13 04:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-10-13 04:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-13 04:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-13 04:46:03,522 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2020-10-13 04:46:03,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-13 04:46:03,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-10-13 04:46:03,523 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-13 04:46:03,784 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-13 04:46:03,785 INFO L295 CfgBuilder]: Removed 5 assume(true) statements. [2020-10-13 04:46:03,790 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:03 BoogieIcfgContainer [2020-10-13 04:46:03,790 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-13 04:46:03,791 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-13 04:46:03,791 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-13 04:46:03,795 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-13 04:46:03,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 04:46:03" (1/3) ... [2020-10-13 04:46:03,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d534267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:03, skipping insertion in model container [2020-10-13 04:46:03,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 04:46:03" (2/3) ... [2020-10-13 04:46:03,796 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d534267 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 04:46:03, skipping insertion in model container [2020-10-13 04:46:03,797 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 04:46:03" (3/3) ... [2020-10-13 04:46:03,798 INFO L109 eAbstractionObserver]: Analyzing ICFG standard_copy3_ground-2.i [2020-10-13 04:46:03,810 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-13 04:46:03,818 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-13 04:46:03,833 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-10-13 04:46:03,866 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-13 04:46:03,866 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-13 04:46:03,867 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-13 04:46:03,867 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-13 04:46:03,867 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-13 04:46:03,867 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-13 04:46:03,867 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-13 04:46:03,868 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-13 04:46:03,892 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states. [2020-10-13 04:46:03,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:46:03,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:03,900 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:03,900 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:03,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:03,907 INFO L82 PathProgramCache]: Analyzing trace with hash -496428460, now seen corresponding path program 1 times [2020-10-13 04:46:03,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:03,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907683048] [2020-10-13 04:46:03,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:04,064 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,164 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,194 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:04,700 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:46:04,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:04,702 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 659 [2020-10-13 04:46:04,705 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:04,705 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-10-13 04:46:04,706 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:04,707 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 4 [2020-10-13 04:46:04,784 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:04,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:04,792 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:04,796 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:04,796 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:04,796 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:04,798 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:46:04,798 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:04,798 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:04,799 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:04,800 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:04,812 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 04:46:04,813 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907683048] [2020-10-13 04:46:04,816 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:04,816 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-13 04:46:04,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845163506] [2020-10-13 04:46:04,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-10-13 04:46:04,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:04,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-10-13 04:46:04,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-10-13 04:46:04,844 INFO L87 Difference]: Start difference. First operand 33 states. Second operand 3 states. [2020-10-13 04:46:04,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:04,989 INFO L93 Difference]: Finished difference Result 58 states and 77 transitions. [2020-10-13 04:46:04,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-10-13 04:46:04,991 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 19 [2020-10-13 04:46:04,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:05,007 INFO L225 Difference]: With dead ends: 58 [2020-10-13 04:46:05,007 INFO L226 Difference]: Without dead ends: 28 [2020-10-13 04:46:05,013 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 04:46:05,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2020-10-13 04:46:05,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2020-10-13 04:46:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-10-13 04:46:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2020-10-13 04:46:05,057 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 19 [2020-10-13 04:46:05,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:05,058 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2020-10-13 04:46:05,058 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-10-13 04:46:05,058 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2020-10-13 04:46:05,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-13 04:46:05,059 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:05,060 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:05,060 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-13 04:46:05,060 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:05,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:05,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1263989582, now seen corresponding path program 1 times [2020-10-13 04:46:05,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:05,062 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1098829268] [2020-10-13 04:46:05,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:05,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,097 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,109 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,127 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,326 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:05,326 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 27 [2020-10-13 04:46:05,326 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:05,327 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 236 [2020-10-13 04:46:05,327 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:46:05,327 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:05,328 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:46:05,328 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:05,354 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:05,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,359 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:05,359 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:05,359 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:05,359 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:05,360 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:05,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:05,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:05,360 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:05,361 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:05,363 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 04:46:05,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1098829268] [2020-10-13 04:46:05,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:05,363 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:46:05,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702695767] [2020-10-13 04:46:05,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:46:05,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:05,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:46:05,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:05,367 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand 4 states. [2020-10-13 04:46:05,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:05,436 INFO L93 Difference]: Finished difference Result 50 states and 58 transitions. [2020-10-13 04:46:05,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:46:05,437 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 19 [2020-10-13 04:46:05,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:05,438 INFO L225 Difference]: With dead ends: 50 [2020-10-13 04:46:05,438 INFO L226 Difference]: Without dead ends: 30 [2020-10-13 04:46:05,439 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 04:46:05,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-10-13 04:46:05,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2020-10-13 04:46:05,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2020-10-13 04:46:05,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 33 transitions. [2020-10-13 04:46:05,447 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 33 transitions. Word has length 19 [2020-10-13 04:46:05,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:05,447 INFO L479 AbstractCegarLoop]: Abstraction has 29 states and 33 transitions. [2020-10-13 04:46:05,447 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:46:05,447 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 33 transitions. [2020-10-13 04:46:05,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-13 04:46:05,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:05,448 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] [2020-10-13 04:46:05,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-13 04:46:05,449 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1258945684, now seen corresponding path program 1 times [2020-10-13 04:46:05,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:05,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747660068] [2020-10-13 04:46:05,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:05,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,487 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,807 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:05,808 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 29 [2020-10-13 04:46:05,808 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:05,808 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 345 [2020-10-13 04:46:05,808 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:05,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-10-13 04:46:05,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:46:05,809 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-10-13 04:46:05,809 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:05,831 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:05,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,835 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:05,835 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:05,835 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:05,836 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:05,836 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:05,836 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:05,837 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:05,837 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:05,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-10-13 04:46:05,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747660068] [2020-10-13 04:46:05,840 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-13 04:46:05,840 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-13 04:46:05,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808406519] [2020-10-13 04:46:05,841 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-13 04:46:05,841 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:05,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-13 04:46:05,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-13 04:46:05,842 INFO L87 Difference]: Start difference. First operand 29 states and 33 transitions. Second operand 4 states. [2020-10-13 04:46:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:05,929 INFO L93 Difference]: Finished difference Result 52 states and 61 transitions. [2020-10-13 04:46:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-13 04:46:05,930 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 21 [2020-10-13 04:46:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:05,932 INFO L225 Difference]: With dead ends: 52 [2020-10-13 04:46:05,932 INFO L226 Difference]: Without dead ends: 35 [2020-10-13 04:46:05,932 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 04:46:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2020-10-13 04:46:05,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 32. [2020-10-13 04:46:05,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-10-13 04:46:05,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2020-10-13 04:46:05,939 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 21 [2020-10-13 04:46:05,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:05,939 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2020-10-13 04:46:05,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-13 04:46:05,940 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2020-10-13 04:46:05,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-13 04:46:05,941 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:05,941 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:05,941 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-13 04:46:05,941 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:05,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:05,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1930458438, now seen corresponding path program 1 times [2020-10-13 04:46:05,942 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:05,942 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384926858] [2020-10-13 04:46:05,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:05,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:05,954 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,966 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,977 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:05,987 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:07,258 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:08,578 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:08,578 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-10-13 04:46:08,587 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:46:08,587 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2626 [2020-10-13 04:46:08,587 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:46:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:46:08,588 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:46:08,588 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:08,627 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:08,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:08,629 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:08,633 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:08,634 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:08,634 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:08,634 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-10-13 04:46:08,634 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:08,635 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:08,635 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:08,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2020-10-13 04:46:08,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384926858] [2020-10-13 04:46:08,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:08,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:46:08,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114390057] [2020-10-13 04:46:08,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:46:08,645 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:08,650 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:46:08,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:08,651 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand 5 states. [2020-10-13 04:46:08,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:08,761 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2020-10-13 04:46:08,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:46:08,761 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 27 [2020-10-13 04:46:08,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:08,762 INFO L225 Difference]: With dead ends: 60 [2020-10-13 04:46:08,762 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:46:08,763 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 04:46:08,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:46:08,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2020-10-13 04:46:08,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-13 04:46:08,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2020-10-13 04:46:08,770 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 27 [2020-10-13 04:46:08,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:08,771 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2020-10-13 04:46:08,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:46:08,771 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2020-10-13 04:46:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-10-13 04:46:08,772 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:08,772 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:08,772 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-13 04:46:08,773 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:08,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:08,773 INFO L82 PathProgramCache]: Analyzing trace with hash 1864129440, now seen corresponding path program 2 times [2020-10-13 04:46:08,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:08,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371846761] [2020-10-13 04:46:08,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:08,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:08,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:08,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:08,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:08,857 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:12,203 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:13,782 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:13,782 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 41 [2020-10-13 04:46:13,783 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:46:13,783 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4999 [2020-10-13 04:46:13,783 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:13,783 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-10-13 04:46:13,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:13,784 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-10-13 04:46:13,784 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:13,817 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:13,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:13,819 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:13,821 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:13,821 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:13,822 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:13,822 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:46:13,822 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:13,822 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:13,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:13,823 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:13,823 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:13,827 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:46:13,828 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371846761] [2020-10-13 04:46:13,828 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:13,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-10-13 04:46:13,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042660393] [2020-10-13 04:46:13,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-13 04:46:13,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:13,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-13 04:46:13,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-13 04:46:13,830 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand 5 states. [2020-10-13 04:46:13,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:13,920 INFO L93 Difference]: Finished difference Result 70 states and 78 transitions. [2020-10-13 04:46:13,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-13 04:46:13,920 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 33 [2020-10-13 04:46:13,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:13,921 INFO L225 Difference]: With dead ends: 70 [2020-10-13 04:46:13,921 INFO L226 Difference]: Without dead ends: 41 [2020-10-13 04:46:13,922 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 04:46:13,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2020-10-13 04:46:13,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2020-10-13 04:46:13,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-13 04:46:13,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2020-10-13 04:46:13,933 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 33 [2020-10-13 04:46:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:13,934 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2020-10-13 04:46:13,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-13 04:46:13,934 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2020-10-13 04:46:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-10-13 04:46:13,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:13,935 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:13,936 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-13 04:46:13,937 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:13,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:13,938 INFO L82 PathProgramCache]: Analyzing trace with hash 1423302462, now seen corresponding path program 3 times [2020-10-13 04:46:13,938 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:13,938 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [39937355] [2020-10-13 04:46:13,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:13,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:13,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:13,994 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:14,048 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:18,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:18,964 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:18,965 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 43 [2020-10-13 04:46:18,965 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-10-13 04:46:18,965 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5007 [2020-10-13 04:46:18,965 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:46:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 29 [2020-10-13 04:46:18,966 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:46:18,966 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:19,011 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:19,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:19,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:19,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:19,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:19,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:19,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-10-13 04:46:19,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:19,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:19,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:19,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:19,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:19,024 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2020-10-13 04:46:19,024 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [39937355] [2020-10-13 04:46:19,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:19,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:46:19,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304021554] [2020-10-13 04:46:19,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:46:19,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:19,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:46:19,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:19,029 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand 6 states. [2020-10-13 04:46:19,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:19,168 INFO L93 Difference]: Finished difference Result 72 states and 81 transitions. [2020-10-13 04:46:19,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:46:19,168 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 35 [2020-10-13 04:46:19,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:19,169 INFO L225 Difference]: With dead ends: 72 [2020-10-13 04:46:19,169 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:46:19,170 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 04:46:19,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:46:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 46. [2020-10-13 04:46:19,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-13 04:46:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2020-10-13 04:46:19,177 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 35 [2020-10-13 04:46:19,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:19,178 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2020-10-13 04:46:19,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:46:19,178 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2020-10-13 04:46:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2020-10-13 04:46:19,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:19,179 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:19,180 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-13 04:46:19,180 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:19,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:19,180 INFO L82 PathProgramCache]: Analyzing trace with hash -808703080, now seen corresponding path program 4 times [2020-10-13 04:46:19,180 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:19,181 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095123077] [2020-10-13 04:46:19,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:19,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:19,197 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:19,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:19,225 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:19,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:24,200 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:24,200 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 49 [2020-10-13 04:46:24,200 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:24,201 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:46:24,201 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:24,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-10-13 04:46:24,201 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:24,202 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-10-13 04:46:24,202 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:24,243 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:24,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:24,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:24,246 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:24,246 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:24,247 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:24,247 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:24,247 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:24,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:24,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:24,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 04:46:24,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095123077] [2020-10-13 04:46:24,252 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:24,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-10-13 04:46:24,253 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115536747] [2020-10-13 04:46:24,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-13 04:46:24,255 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:24,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-13 04:46:24,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-13 04:46:24,255 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand 6 states. [2020-10-13 04:46:24,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:24,346 INFO L93 Difference]: Finished difference Result 84 states and 92 transitions. [2020-10-13 04:46:24,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-13 04:46:24,347 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 41 [2020-10-13 04:46:24,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:24,348 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:46:24,348 INFO L226 Difference]: Without dead ends: 49 [2020-10-13 04:46:24,349 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 04:46:24,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-13 04:46:24,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2020-10-13 04:46:24,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-13 04:46:24,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2020-10-13 04:46:24,355 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 41 [2020-10-13 04:46:24,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:24,356 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2020-10-13 04:46:24,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-13 04:46:24,356 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2020-10-13 04:46:24,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-10-13 04:46:24,357 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:24,357 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:24,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-13 04:46:24,358 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:24,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:24,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1938764086, now seen corresponding path program 5 times [2020-10-13 04:46:24,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:24,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333528472] [2020-10-13 04:46:24,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:24,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:24,373 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:24,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:24,399 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:24,764 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,375 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:29,375 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-10-13 04:46:29,375 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:29,375 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5006 [2020-10-13 04:46:29,376 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:29,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:46:29,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 19 [2020-10-13 04:46:29,376 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:46:29,376 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:29,432 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:29,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:29,434 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,435 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:29,435 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:29,436 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:29,436 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:29,436 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:29,436 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:29,437 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:29,437 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:46:29,441 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2020-10-13 04:46:29,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333528472] [2020-10-13 04:46:29,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:29,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:46:29,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363589740] [2020-10-13 04:46:29,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:46:29,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:29,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:46:29,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:46:29,444 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand 7 states. [2020-10-13 04:46:29,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:29,581 INFO L93 Difference]: Finished difference Result 84 states and 93 transitions. [2020-10-13 04:46:29,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:46:29,581 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 43 [2020-10-13 04:46:29,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:29,583 INFO L225 Difference]: With dead ends: 84 [2020-10-13 04:46:29,583 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:46:29,583 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 04:46:29,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:46:29,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-10-13 04:46:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-13 04:46:29,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 58 transitions. [2020-10-13 04:46:29,595 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 58 transitions. Word has length 43 [2020-10-13 04:46:29,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:29,595 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 58 transitions. [2020-10-13 04:46:29,595 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:46:29,596 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 58 transitions. [2020-10-13 04:46:29,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2020-10-13 04:46:29,599 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:29,599 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:29,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-10-13 04:46:29,600 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:29,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:29,600 INFO L82 PathProgramCache]: Analyzing trace with hash 1392108432, now seen corresponding path program 6 times [2020-10-13 04:46:29,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:29,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18377919] [2020-10-13 04:46:29,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:29,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:29,620 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:29,646 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:30,050 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,636 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:34,637 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 57 [2020-10-13 04:46:34,637 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:34,637 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5022 [2020-10-13 04:46:34,637 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-10-13 04:46:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:34,637 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 8 [2020-10-13 04:46:34,638 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:34,680 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:34,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:34,682 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:34,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:34,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:34,684 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:34,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:34,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:34,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:34,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:34,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 04:46:34,688 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18377919] [2020-10-13 04:46:34,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:34,688 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-10-13 04:46:34,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467968711] [2020-10-13 04:46:34,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-13 04:46:34,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:34,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-13 04:46:34,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-10-13 04:46:34,690 INFO L87 Difference]: Start difference. First operand 54 states and 58 transitions. Second operand 7 states. [2020-10-13 04:46:34,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:34,780 INFO L93 Difference]: Finished difference Result 98 states and 106 transitions. [2020-10-13 04:46:34,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-13 04:46:34,781 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 49 [2020-10-13 04:46:34,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:34,782 INFO L225 Difference]: With dead ends: 98 [2020-10-13 04:46:34,782 INFO L226 Difference]: Without dead ends: 57 [2020-10-13 04:46:34,783 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 04:46:34,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-10-13 04:46:34,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2020-10-13 04:46:34,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-13 04:46:34,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2020-10-13 04:46:34,789 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 49 [2020-10-13 04:46:34,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:34,789 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2020-10-13 04:46:34,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-13 04:46:34,789 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2020-10-13 04:46:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-10-13 04:46:34,790 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:34,790 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:34,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-13 04:46:34,791 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:34,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:34,791 INFO L82 PathProgramCache]: Analyzing trace with hash 1545890606, now seen corresponding path program 7 times [2020-10-13 04:46:34,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:34,792 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587603080] [2020-10-13 04:46:34,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:34,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,820 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:34,833 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:35,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:39,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 59 [2020-10-13 04:46:39,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:39,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5008 [2020-10-13 04:46:39,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:39,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:46:39,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 21 [2020-10-13 04:46:39,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:46:39,811 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:39,878 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:39,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:39,880 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:39,881 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:39,882 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:39,882 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:39,882 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:39,882 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:39,882 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:39,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:39,883 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:39,883 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:39,886 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2020-10-13 04:46:39,887 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587603080] [2020-10-13 04:46:39,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:39,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:46:39,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600706093] [2020-10-13 04:46:39,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:46:39,888 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:39,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:46:39,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:39,889 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand 8 states. [2020-10-13 04:46:40,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:40,054 INFO L93 Difference]: Finished difference Result 96 states and 105 transitions. [2020-10-13 04:46:40,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:46:40,055 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-10-13 04:46:40,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:40,056 INFO L225 Difference]: With dead ends: 96 [2020-10-13 04:46:40,056 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:46:40,057 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 04:46:40,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:46:40,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 62. [2020-10-13 04:46:40,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-13 04:46:40,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2020-10-13 04:46:40,075 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 51 [2020-10-13 04:46:40,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:40,076 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2020-10-13 04:46:40,076 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:46:40,076 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2020-10-13 04:46:40,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2020-10-13 04:46:40,080 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:40,081 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:40,081 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-13 04:46:40,081 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:40,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:40,081 INFO L82 PathProgramCache]: Analyzing trace with hash -846363768, now seen corresponding path program 8 times [2020-10-13 04:46:40,082 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:40,084 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274080686] [2020-10-13 04:46:40,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:40,107 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:40,124 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:40,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:41,033 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:45,104 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:45,105 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 65 [2020-10-13 04:46:45,105 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:45,105 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:45,105 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-10-13 04:46:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:45,105 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-10-13 04:46:45,105 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:45,176 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:45,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:45,180 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:45,180 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:45,180 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:45,180 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:45,180 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:45,180 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:45,181 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:45,181 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:45,185 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 04:46:45,186 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274080686] [2020-10-13 04:46:45,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:45,186 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-10-13 04:46:45,186 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281245485] [2020-10-13 04:46:45,187 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-13 04:46:45,187 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:45,187 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-13 04:46:45,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-10-13 04:46:45,188 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand 8 states. [2020-10-13 04:46:45,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:45,272 INFO L93 Difference]: Finished difference Result 112 states and 120 transitions. [2020-10-13 04:46:45,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-13 04:46:45,272 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 57 [2020-10-13 04:46:45,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:45,273 INFO L225 Difference]: With dead ends: 112 [2020-10-13 04:46:45,274 INFO L226 Difference]: Without dead ends: 65 [2020-10-13 04:46:45,275 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 04:46:45,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-13 04:46:45,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2020-10-13 04:46:45,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-13 04:46:45,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2020-10-13 04:46:45,281 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 57 [2020-10-13 04:46:45,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:45,281 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2020-10-13 04:46:45,281 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-13 04:46:45,281 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2020-10-13 04:46:45,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-10-13 04:46:45,282 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:45,282 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:45,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-13 04:46:45,283 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:45,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:45,283 INFO L82 PathProgramCache]: Analyzing trace with hash -1518498522, now seen corresponding path program 9 times [2020-10-13 04:46:45,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:45,284 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1212693728] [2020-10-13 04:46:45,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:45,298 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:45,311 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:45,327 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:46,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,296 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:50,297 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 67 [2020-10-13 04:46:50,297 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:50,297 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5003 [2020-10-13 04:46:50,297 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:50,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:46:50,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:46:50,297 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:46:50,298 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:50,369 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:50,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:50,371 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,372 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:50,372 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:50,373 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:50,373 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:50,373 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:50,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:50,373 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:50,374 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:50,374 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:50,380 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2020-10-13 04:46:50,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1212693728] [2020-10-13 04:46:50,381 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:50,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:46:50,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672460428] [2020-10-13 04:46:50,382 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:46:50,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:50,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:46:50,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:50,383 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand 9 states. [2020-10-13 04:46:50,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:50,483 INFO L93 Difference]: Finished difference Result 114 states and 122 transitions. [2020-10-13 04:46:50,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:46:50,484 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 59 [2020-10-13 04:46:50,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:50,485 INFO L225 Difference]: With dead ends: 114 [2020-10-13 04:46:50,485 INFO L226 Difference]: Without dead ends: 67 [2020-10-13 04:46:50,487 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 04:46:50,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-13 04:46:50,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2020-10-13 04:46:50,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-13 04:46:50,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 70 transitions. [2020-10-13 04:46:50,500 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 70 transitions. Word has length 59 [2020-10-13 04:46:50,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:50,500 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 70 transitions. [2020-10-13 04:46:50,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:46:50,500 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 70 transitions. [2020-10-13 04:46:50,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2020-10-13 04:46:50,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:50,501 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:50,501 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-13 04:46:50,502 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:50,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:50,505 INFO L82 PathProgramCache]: Analyzing trace with hash 1100064580, now seen corresponding path program 10 times [2020-10-13 04:46:50,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:50,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233472297] [2020-10-13 04:46:50,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:50,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:50,524 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:50,558 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:51,488 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,531 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:55,532 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-10-13 04:46:55,532 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:46:55,532 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:46:55,532 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-10-13 04:46:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 37 [2020-10-13 04:46:55,532 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 12 [2020-10-13 04:46:55,533 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:55,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:46:55,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:55,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:46:55,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:46:55,604 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:46:55,604 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:46:55,604 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:46:55,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:46:55,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:46:55,605 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:46:55,605 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:46:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2020-10-13 04:46:55,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233472297] [2020-10-13 04:46:55,610 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:46:55,610 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-10-13 04:46:55,611 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855408569] [2020-10-13 04:46:55,611 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-13 04:46:55,611 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:46:55,612 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-13 04:46:55,612 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-13 04:46:55,612 INFO L87 Difference]: Start difference. First operand 66 states and 70 transitions. Second operand 9 states. [2020-10-13 04:46:55,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:46:55,781 INFO L93 Difference]: Finished difference Result 110 states and 119 transitions. [2020-10-13 04:46:55,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-13 04:46:55,782 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 61 [2020-10-13 04:46:55,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:46:55,783 INFO L225 Difference]: With dead ends: 110 [2020-10-13 04:46:55,783 INFO L226 Difference]: Without dead ends: 75 [2020-10-13 04:46:55,784 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 04:46:55,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-13 04:46:55,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-10-13 04:46:55,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-13 04:46:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2020-10-13 04:46:55,791 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 61 [2020-10-13 04:46:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:46:55,791 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2020-10-13 04:46:55,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-13 04:46:55,792 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2020-10-13 04:46:55,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-10-13 04:46:55,792 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:46:55,793 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:46:55,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-10-13 04:46:55,793 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:46:55,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:46:55,793 INFO L82 PathProgramCache]: Analyzing trace with hash -259877090, now seen corresponding path program 11 times [2020-10-13 04:46:55,794 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:46:55,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [852347071] [2020-10-13 04:46:55,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:46:55,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:46:55,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,831 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:55,849 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:46:57,176 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,809 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:00,810 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 75 [2020-10-13 04:47:00,810 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:47:00,810 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5005 [2020-10-13 04:47:00,810 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:00,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:47:00,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 53 [2020-10-13 04:47:00,810 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:47:00,810 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:00,902 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:00,904 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:00,905 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:00,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:00,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:00,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:00,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:00,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:00,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:00,910 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2020-10-13 04:47:00,911 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [852347071] [2020-10-13 04:47:00,911 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:00,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:47:00,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528505338] [2020-10-13 04:47:00,912 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:47:00,912 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:00,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:47:00,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:00,913 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand 10 states. [2020-10-13 04:47:01,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:01,103 INFO L93 Difference]: Finished difference Result 120 states and 129 transitions. [2020-10-13 04:47:01,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:47:01,103 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 67 [2020-10-13 04:47:01,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:01,105 INFO L225 Difference]: With dead ends: 120 [2020-10-13 04:47:01,105 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:47:01,106 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 04:47:01,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:47:01,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 78. [2020-10-13 04:47:01,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-13 04:47:01,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2020-10-13 04:47:01,111 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 67 [2020-10-13 04:47:01,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:01,112 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2020-10-13 04:47:01,112 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:47:01,112 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2020-10-13 04:47:01,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2020-10-13 04:47:01,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:01,113 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:01,113 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-10-13 04:47:01,113 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:01,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:01,114 INFO L82 PathProgramCache]: Analyzing trace with hash 780565368, now seen corresponding path program 12 times [2020-10-13 04:47:01,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:01,114 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896494817] [2020-10-13 04:47:01,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:01,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:01,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:01,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:01,153 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:03,238 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,136 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:06,137 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 81 [2020-10-13 04:47:06,137 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:47:06,137 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:47:06,137 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-10-13 04:47:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:06,137 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-10-13 04:47:06,138 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:06,206 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:06,208 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,209 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:06,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:06,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:06,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:06,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:06,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:06,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:06,215 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 04:47:06,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896494817] [2020-10-13 04:47:06,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:06,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-10-13 04:47:06,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273452378] [2020-10-13 04:47:06,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-13 04:47:06,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:06,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-13 04:47:06,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-10-13 04:47:06,221 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand 10 states. [2020-10-13 04:47:06,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:06,351 INFO L93 Difference]: Finished difference Result 140 states and 148 transitions. [2020-10-13 04:47:06,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-13 04:47:06,351 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 73 [2020-10-13 04:47:06,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:06,352 INFO L225 Difference]: With dead ends: 140 [2020-10-13 04:47:06,353 INFO L226 Difference]: Without dead ends: 81 [2020-10-13 04:47:06,354 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 04:47:06,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-13 04:47:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2020-10-13 04:47:06,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-13 04:47:06,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2020-10-13 04:47:06,358 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 73 [2020-10-13 04:47:06,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:06,359 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2020-10-13 04:47:06,359 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-13 04:47:06,359 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2020-10-13 04:47:06,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-10-13 04:47:06,360 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:06,360 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:06,360 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-10-13 04:47:06,361 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:06,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:06,361 INFO L82 PathProgramCache]: Analyzing trace with hash -400848618, now seen corresponding path program 13 times [2020-10-13 04:47:06,361 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:06,362 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [99748105] [2020-10-13 04:47:06,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:06,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:06,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,419 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:06,474 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:09,758 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,382 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:11,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 83 [2020-10-13 04:47:11,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:47:11,383 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5009 [2020-10-13 04:47:11,383 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:11,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:47:11,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:11,383 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:47:11,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:11,468 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:11,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:11,469 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,470 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:11,470 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:11,471 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:11,471 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:11,471 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:11,471 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:11,472 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 147 trivial. 0 not checked. [2020-10-13 04:47:11,477 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [99748105] [2020-10-13 04:47:11,477 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:11,477 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:47:11,477 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026199054] [2020-10-13 04:47:11,478 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:47:11,478 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:11,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:47:11,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:11,478 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand 11 states. [2020-10-13 04:47:11,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:11,590 INFO L93 Difference]: Finished difference Result 142 states and 150 transitions. [2020-10-13 04:47:11,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:47:11,590 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 75 [2020-10-13 04:47:11,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:11,592 INFO L225 Difference]: With dead ends: 142 [2020-10-13 04:47:11,592 INFO L226 Difference]: Without dead ends: 83 [2020-10-13 04:47:11,593 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 04:47:11,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-13 04:47:11,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2020-10-13 04:47:11,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-13 04:47:11,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2020-10-13 04:47:11,598 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 75 [2020-10-13 04:47:11,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:11,599 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2020-10-13 04:47:11,599 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:47:11,599 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2020-10-13 04:47:11,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2020-10-13 04:47:11,600 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:11,600 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:11,600 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-10-13 04:47:11,600 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:11,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:11,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1868323020, now seen corresponding path program 14 times [2020-10-13 04:47:11,601 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:11,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383954771] [2020-10-13 04:47:11,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:11,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:11,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,655 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:11,683 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:15,432 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:16,638 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:16,639 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 85 [2020-10-13 04:47:16,639 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 4 [2020-10-13 04:47:16,639 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5023 [2020-10-13 04:47:16,639 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:16,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-10-13 04:47:16,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:47:16,639 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 16 [2020-10-13 04:47:16,639 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:16,724 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:16,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:16,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:16,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:16,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:16,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:16,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:16,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:16,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:16,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:16,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:16,728 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:16,733 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 162 trivial. 0 not checked. [2020-10-13 04:47:16,734 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383954771] [2020-10-13 04:47:16,734 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:16,734 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-10-13 04:47:16,735 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136472035] [2020-10-13 04:47:16,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-13 04:47:16,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:16,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-13 04:47:16,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-10-13 04:47:16,737 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand 11 states. [2020-10-13 04:47:16,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:16,971 INFO L93 Difference]: Finished difference Result 134 states and 143 transitions. [2020-10-13 04:47:16,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-13 04:47:16,971 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 77 [2020-10-13 04:47:16,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:16,972 INFO L225 Difference]: With dead ends: 134 [2020-10-13 04:47:16,972 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:47:16,973 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 04:47:16,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:47:16,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 88. [2020-10-13 04:47:16,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-13 04:47:16,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2020-10-13 04:47:16,980 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 77 [2020-10-13 04:47:16,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:16,982 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2020-10-13 04:47:16,982 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-13 04:47:16,982 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2020-10-13 04:47:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-10-13 04:47:16,983 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:16,983 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:16,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-10-13 04:47:16,984 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:16,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:16,984 INFO L82 PathProgramCache]: Analyzing trace with hash 1093690126, now seen corresponding path program 15 times [2020-10-13 04:47:16,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:16,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1269885723] [2020-10-13 04:47:16,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:17,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:17,009 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:17,035 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:17,063 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:22,018 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:22,018 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 91 [2020-10-13 04:47:22,018 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:22,018 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5014 [2020-10-13 04:47:22,018 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:22,018 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:47:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:22,019 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:47:22,019 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:22,118 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:22,120 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:22,121 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:22,121 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:22,121 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:22,121 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:22,122 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:22,122 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:22,122 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:22,126 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2020-10-13 04:47:22,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1269885723] [2020-10-13 04:47:22,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:22,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:47:22,127 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981505942] [2020-10-13 04:47:22,127 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:47:22,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:22,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:47:22,128 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:22,128 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand 12 states. [2020-10-13 04:47:22,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:22,222 INFO L93 Difference]: Finished difference Result 156 states and 164 transitions. [2020-10-13 04:47:22,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:47:22,222 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 83 [2020-10-13 04:47:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:22,224 INFO L225 Difference]: With dead ends: 156 [2020-10-13 04:47:22,224 INFO L226 Difference]: Without dead ends: 91 [2020-10-13 04:47:22,225 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 04:47:22,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-13 04:47:22,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2020-10-13 04:47:22,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-13 04:47:22,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2020-10-13 04:47:22,233 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 83 [2020-10-13 04:47:22,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:22,233 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2020-10-13 04:47:22,233 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:47:22,234 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2020-10-13 04:47:22,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2020-10-13 04:47:22,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:22,234 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:22,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-10-13 04:47:22,235 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:22,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:22,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1186956076, now seen corresponding path program 16 times [2020-10-13 04:47:22,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:22,235 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [815901034] [2020-10-13 04:47:22,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:22,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:22,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:22,290 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,291 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:27,291 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 93 [2020-10-13 04:47:27,291 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:27,292 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5044 [2020-10-13 04:47:27,292 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-10-13 04:47:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 31 [2020-10-13 04:47:27,292 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-10-13 04:47:27,292 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:27,380 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:27,382 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:27,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:27,383 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:27,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:27,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:27,384 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:27,388 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 209 trivial. 0 not checked. [2020-10-13 04:47:27,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [815901034] [2020-10-13 04:47:27,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:27,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-10-13 04:47:27,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908632465] [2020-10-13 04:47:27,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-13 04:47:27,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:27,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-13 04:47:27,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2020-10-13 04:47:27,390 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand 12 states. [2020-10-13 04:47:27,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:27,608 INFO L93 Difference]: Finished difference Result 146 states and 155 transitions. [2020-10-13 04:47:27,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-13 04:47:27,609 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 85 [2020-10-13 04:47:27,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:27,610 INFO L225 Difference]: With dead ends: 146 [2020-10-13 04:47:27,610 INFO L226 Difference]: Without dead ends: 99 [2020-10-13 04:47:27,611 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 04:47:27,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-13 04:47:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2020-10-13 04:47:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-13 04:47:27,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 100 transitions. [2020-10-13 04:47:27,617 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 100 transitions. Word has length 85 [2020-10-13 04:47:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:27,617 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 100 transitions. [2020-10-13 04:47:27,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-13 04:47:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 100 transitions. [2020-10-13 04:47:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-10-13 04:47:27,618 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:27,618 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:27,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-10-13 04:47:27,619 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:27,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:27,619 INFO L82 PathProgramCache]: Analyzing trace with hash -1163320058, now seen corresponding path program 17 times [2020-10-13 04:47:27,619 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:27,620 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428220474] [2020-10-13 04:47:27,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:27,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,651 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:27,668 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:32,661 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:32,661 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 99 [2020-10-13 04:47:32,661 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:32,661 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 04:47:32,662 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:47:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 51 [2020-10-13 04:47:32,662 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:47:32,662 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:32,770 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:32,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:32,772 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:32,773 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:32,774 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:32,774 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:32,774 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:32,774 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:32,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:32,774 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:32,775 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:32,775 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:32,780 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 243 trivial. 0 not checked. [2020-10-13 04:47:32,781 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428220474] [2020-10-13 04:47:32,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:32,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:47:32,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878324967] [2020-10-13 04:47:32,782 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:47:32,782 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:32,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:47:32,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:32,783 INFO L87 Difference]: Start difference. First operand 96 states and 100 transitions. Second operand 13 states. [2020-10-13 04:47:32,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:32,988 INFO L93 Difference]: Finished difference Result 156 states and 165 transitions. [2020-10-13 04:47:32,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:47:32,988 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 91 [2020-10-13 04:47:32,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:32,989 INFO L225 Difference]: With dead ends: 156 [2020-10-13 04:47:32,989 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:47:32,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:32,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:47:32,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 102. [2020-10-13 04:47:32,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-13 04:47:32,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2020-10-13 04:47:32,996 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 91 [2020-10-13 04:47:32,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:32,996 INFO L479 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2020-10-13 04:47:32,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:47:32,996 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2020-10-13 04:47:32,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2020-10-13 04:47:32,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:32,997 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:32,998 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-10-13 04:47:32,998 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:32,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:32,998 INFO L82 PathProgramCache]: Analyzing trace with hash -1994376352, now seen corresponding path program 18 times [2020-10-13 04:47:32,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:32,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549226084] [2020-10-13 04:47:32,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:33,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:33,015 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:33,041 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:33,070 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,065 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:38,065 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 105 [2020-10-13 04:47:38,065 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5055 [2020-10-13 04:47:38,066 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:38,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 11 [2020-10-13 04:47:38,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:38,066 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 20 [2020-10-13 04:47:38,066 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:38,180 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:38,182 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,183 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:38,183 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:38,183 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:38,183 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:38,183 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:38,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:38,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:38,184 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:38,184 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:38,190 INFO L134 CoverageAnalysis]: Checked inductivity of 381 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 04:47:38,190 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549226084] [2020-10-13 04:47:38,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:38,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-10-13 04:47:38,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22338203] [2020-10-13 04:47:38,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-13 04:47:38,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:38,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-13 04:47:38,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2020-10-13 04:47:38,192 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand 13 states. [2020-10-13 04:47:38,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:38,327 INFO L93 Difference]: Finished difference Result 182 states and 190 transitions. [2020-10-13 04:47:38,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-13 04:47:38,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 97 [2020-10-13 04:47:38,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:38,329 INFO L225 Difference]: With dead ends: 182 [2020-10-13 04:47:38,330 INFO L226 Difference]: Without dead ends: 105 [2020-10-13 04:47:38,330 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 04:47:38,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-13 04:47:38,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2020-10-13 04:47:38,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-13 04:47:38,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2020-10-13 04:47:38,335 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 97 [2020-10-13 04:47:38,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:38,335 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2020-10-13 04:47:38,335 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-13 04:47:38,336 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2020-10-13 04:47:38,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-10-13 04:47:38,336 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:38,337 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:38,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-10-13 04:47:38,337 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:38,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:38,337 INFO L82 PathProgramCache]: Analyzing trace with hash 493735678, now seen corresponding path program 19 times [2020-10-13 04:47:38,338 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:38,338 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232140055] [2020-10-13 04:47:38,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:38,363 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,387 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:38,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,396 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:43,397 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 107 [2020-10-13 04:47:43,397 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:43,397 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5043 [2020-10-13 04:47:43,397 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:47:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:47:43,397 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:47:43,397 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:43,516 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:43,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:43,518 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:43,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:43,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:43,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:43,520 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:43,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:43,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:43,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:43,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:43,526 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2020-10-13 04:47:43,527 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232140055] [2020-10-13 04:47:43,527 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:43,527 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:47:43,527 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975829836] [2020-10-13 04:47:43,527 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:47:43,528 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:43,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:47:43,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:43,528 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand 14 states. [2020-10-13 04:47:43,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:43,770 INFO L93 Difference]: Finished difference Result 168 states and 177 transitions. [2020-10-13 04:47:43,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:47:43,772 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 99 [2020-10-13 04:47:43,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:43,773 INFO L225 Difference]: With dead ends: 168 [2020-10-13 04:47:43,773 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:47:43,773 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 04:47:43,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:47:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2020-10-13 04:47:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-13 04:47:43,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2020-10-13 04:47:43,782 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 99 [2020-10-13 04:47:43,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:43,782 INFO L479 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2020-10-13 04:47:43,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:47:43,783 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2020-10-13 04:47:43,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2020-10-13 04:47:43,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:43,784 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:43,784 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-10-13 04:47:43,784 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:43,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:43,784 INFO L82 PathProgramCache]: Analyzing trace with hash 1998539608, now seen corresponding path program 20 times [2020-10-13 04:47:43,785 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:43,785 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1450016496] [2020-10-13 04:47:43,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:43,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:43,812 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,834 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:43,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:48,817 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:48,818 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 113 [2020-10-13 04:47:48,818 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:48,818 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5012 [2020-10-13 04:47:48,818 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-10-13 04:47:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:48,818 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-10-13 04:47:48,818 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:48,940 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:48,943 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:48,944 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:48,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:48,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:48,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:47:48,944 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:48,944 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:48,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:48,945 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:48,950 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-13 04:47:48,951 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1450016496] [2020-10-13 04:47:48,951 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:48,951 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14] total 14 [2020-10-13 04:47:48,951 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026213182] [2020-10-13 04:47:48,952 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-13 04:47:48,952 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:48,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-13 04:47:48,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2020-10-13 04:47:48,953 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand 14 states. [2020-10-13 04:47:49,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:49,058 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2020-10-13 04:47:49,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-13 04:47:49,059 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 105 [2020-10-13 04:47:49,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:49,060 INFO L225 Difference]: With dead ends: 196 [2020-10-13 04:47:49,060 INFO L226 Difference]: Without dead ends: 113 [2020-10-13 04:47:49,061 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 04:47:49,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-13 04:47:49,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2020-10-13 04:47:49,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-13 04:47:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 116 transitions. [2020-10-13 04:47:49,067 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 116 transitions. Word has length 105 [2020-10-13 04:47:49,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:49,067 INFO L479 AbstractCegarLoop]: Abstraction has 112 states and 116 transitions. [2020-10-13 04:47:49,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-13 04:47:49,067 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 116 transitions. [2020-10-13 04:47:49,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2020-10-13 04:47:49,068 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:49,068 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:49,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-10-13 04:47:49,069 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:49,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:49,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1013342454, now seen corresponding path program 21 times [2020-10-13 04:47:49,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:49,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2052548214] [2020-10-13 04:47:49,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:49,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:49,088 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:49,111 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:49,137 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:54,114 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 115 [2020-10-13 04:47:54,114 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:54,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5031 [2020-10-13 04:47:54,114 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:54,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:47:54,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 35 [2020-10-13 04:47:54,114 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:47:54,114 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:54,250 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:54,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:54,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,253 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:54,253 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:54,253 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:54,253 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:54,253 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:54,253 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:54,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:54,254 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:54,254 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:54,260 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 363 trivial. 0 not checked. [2020-10-13 04:47:54,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2052548214] [2020-10-13 04:47:54,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:54,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:47:54,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754852906] [2020-10-13 04:47:54,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:47:54,261 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:54,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:47:54,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:54,261 INFO L87 Difference]: Start difference. First operand 112 states and 116 transitions. Second operand 15 states. [2020-10-13 04:47:54,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:54,526 INFO L93 Difference]: Finished difference Result 180 states and 189 transitions. [2020-10-13 04:47:54,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:47:54,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 107 [2020-10-13 04:47:54,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:54,528 INFO L225 Difference]: With dead ends: 180 [2020-10-13 04:47:54,529 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 04:47:54,529 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 04:47:54,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 04:47:54,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 118. [2020-10-13 04:47:54,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-13 04:47:54,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2020-10-13 04:47:54,535 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 107 [2020-10-13 04:47:54,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:54,536 INFO L479 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2020-10-13 04:47:54,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:47:54,536 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2020-10-13 04:47:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2020-10-13 04:47:54,537 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:54,537 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:54,537 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2020-10-13 04:47:54,538 INFO L427 AbstractCegarLoop]: === Iteration 25 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:54,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:54,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1188840272, now seen corresponding path program 22 times [2020-10-13 04:47:54,538 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:54,538 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1217458174] [2020-10-13 04:47:54,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:54,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:54,561 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:54,608 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,590 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:59,590 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 121 [2020-10-13 04:47:59,590 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:47:59,590 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5036 [2020-10-13 04:47:59,590 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:59,590 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 13 [2020-10-13 04:47:59,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:47:59,591 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 24 [2020-10-13 04:47:59,591 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:59,741 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:47:59,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:59,743 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,743 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:47:59,744 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:47:59,744 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:47:59,744 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:47:59,744 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:47:59,744 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:47:59,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:47:59,745 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:47:59,745 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:47:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-10-13 04:47:59,752 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1217458174] [2020-10-13 04:47:59,753 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:47:59,753 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-10-13 04:47:59,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630993260] [2020-10-13 04:47:59,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-13 04:47:59,754 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:47:59,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-13 04:47:59,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2020-10-13 04:47:59,754 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand 15 states. [2020-10-13 04:47:59,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:47:59,898 INFO L93 Difference]: Finished difference Result 210 states and 218 transitions. [2020-10-13 04:47:59,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-13 04:47:59,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 113 [2020-10-13 04:47:59,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:47:59,901 INFO L225 Difference]: With dead ends: 210 [2020-10-13 04:47:59,901 INFO L226 Difference]: Without dead ends: 121 [2020-10-13 04:47:59,902 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 04:47:59,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-13 04:47:59,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2020-10-13 04:47:59,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-13 04:47:59,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 124 transitions. [2020-10-13 04:47:59,907 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 124 transitions. Word has length 113 [2020-10-13 04:47:59,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:47:59,908 INFO L479 AbstractCegarLoop]: Abstraction has 120 states and 124 transitions. [2020-10-13 04:47:59,908 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-13 04:47:59,908 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 124 transitions. [2020-10-13 04:47:59,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2020-10-13 04:47:59,909 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:47:59,909 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:47:59,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2020-10-13 04:47:59,910 INFO L427 AbstractCegarLoop]: === Iteration 26 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:47:59,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:47:59,910 INFO L82 PathProgramCache]: Analyzing trace with hash -193275154, now seen corresponding path program 23 times [2020-10-13 04:47:59,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:47:59,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1229092380] [2020-10-13 04:47:59,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:47:59,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:47:59,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:47:59,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:00,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:04,961 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:04,961 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 123 [2020-10-13 04:48:04,961 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:04,961 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 04:48:04,962 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:04,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:48:04,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 63 [2020-10-13 04:48:04,962 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:48:04,962 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:05,117 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:05,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:05,119 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:05,120 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:05,120 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:05,120 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:05,120 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:05,121 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:05,121 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:05,121 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:05,130 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 432 trivial. 0 not checked. [2020-10-13 04:48:05,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1229092380] [2020-10-13 04:48:05,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:05,131 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:48:05,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695361150] [2020-10-13 04:48:05,133 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:48:05,133 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:05,133 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:48:05,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:05,134 INFO L87 Difference]: Start difference. First operand 120 states and 124 transitions. Second operand 16 states. [2020-10-13 04:48:05,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:05,409 INFO L93 Difference]: Finished difference Result 192 states and 201 transitions. [2020-10-13 04:48:05,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:48:05,409 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 115 [2020-10-13 04:48:05,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:05,410 INFO L225 Difference]: With dead ends: 192 [2020-10-13 04:48:05,410 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:48:05,411 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 04:48:05,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:48:05,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 126. [2020-10-13 04:48:05,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-13 04:48:05,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2020-10-13 04:48:05,417 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 115 [2020-10-13 04:48:05,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:05,417 INFO L479 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2020-10-13 04:48:05,417 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:48:05,417 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2020-10-13 04:48:05,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2020-10-13 04:48:05,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:05,418 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:05,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2020-10-13 04:48:05,419 INFO L427 AbstractCegarLoop]: === Iteration 27 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:05,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:05,419 INFO L82 PathProgramCache]: Analyzing trace with hash 490677064, now seen corresponding path program 24 times [2020-10-13 04:48:05,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:05,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51365595] [2020-10-13 04:48:05,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:05,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:05,444 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:05,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:05,491 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:10,494 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:10,494 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 129 [2020-10-13 04:48:10,494 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:10,494 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-13 04:48:10,494 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:10,494 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-10-13 04:48:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:10,495 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-10-13 04:48:10,495 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:10,639 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:10,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:10,642 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:10,642 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:10,643 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:10,643 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:10,643 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:10,643 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:10,643 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:10,644 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:10,651 INFO L134 CoverageAnalysis]: Checked inductivity of 651 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-13 04:48:10,652 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51365595] [2020-10-13 04:48:10,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:10,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2020-10-13 04:48:10,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328381460] [2020-10-13 04:48:10,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-13 04:48:10,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:10,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-13 04:48:10,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2020-10-13 04:48:10,659 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand 16 states. [2020-10-13 04:48:10,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:10,767 INFO L93 Difference]: Finished difference Result 224 states and 232 transitions. [2020-10-13 04:48:10,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-13 04:48:10,768 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 121 [2020-10-13 04:48:10,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:10,769 INFO L225 Difference]: With dead ends: 224 [2020-10-13 04:48:10,769 INFO L226 Difference]: Without dead ends: 129 [2020-10-13 04:48:10,772 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 04:48:10,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-13 04:48:10,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2020-10-13 04:48:10,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-13 04:48:10,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 132 transitions. [2020-10-13 04:48:10,783 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 132 transitions. Word has length 121 [2020-10-13 04:48:10,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:10,784 INFO L479 AbstractCegarLoop]: Abstraction has 128 states and 132 transitions. [2020-10-13 04:48:10,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-13 04:48:10,784 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 132 transitions. [2020-10-13 04:48:10,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2020-10-13 04:48:10,785 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:10,785 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:10,786 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2020-10-13 04:48:10,786 INFO L427 AbstractCegarLoop]: === Iteration 28 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:10,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:10,786 INFO L82 PathProgramCache]: Analyzing trace with hash 747846886, now seen corresponding path program 25 times [2020-10-13 04:48:10,786 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:10,786 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [661120257] [2020-10-13 04:48:10,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:10,806 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:10,832 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:10,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:15,890 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:15,890 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 131 [2020-10-13 04:48:15,890 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:15,890 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5091 [2020-10-13 04:48:15,891 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:48:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 67 [2020-10-13 04:48:15,891 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:48:15,891 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:16,057 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:16,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:16,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,060 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:16,060 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:16,060 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:16,060 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:16,060 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:16,060 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:16,061 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:16,061 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 507 trivial. 0 not checked. [2020-10-13 04:48:16,068 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [661120257] [2020-10-13 04:48:16,068 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:16,069 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:48:16,069 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029292513] [2020-10-13 04:48:16,069 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:48:16,069 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:16,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:48:16,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:16,070 INFO L87 Difference]: Start difference. First operand 128 states and 132 transitions. Second operand 17 states. [2020-10-13 04:48:16,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:16,365 INFO L93 Difference]: Finished difference Result 204 states and 213 transitions. [2020-10-13 04:48:16,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:48:16,365 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 123 [2020-10-13 04:48:16,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:16,367 INFO L225 Difference]: With dead ends: 204 [2020-10-13 04:48:16,367 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 04:48:16,368 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 04:48:16,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 04:48:16,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 134. [2020-10-13 04:48:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-13 04:48:16,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2020-10-13 04:48:16,373 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 123 [2020-10-13 04:48:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:16,374 INFO L479 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2020-10-13 04:48:16,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:48:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2020-10-13 04:48:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2020-10-13 04:48:16,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:16,375 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:16,375 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2020-10-13 04:48:16,375 INFO L427 AbstractCegarLoop]: === Iteration 29 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:16,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:16,375 INFO L82 PathProgramCache]: Analyzing trace with hash 691006272, now seen corresponding path program 26 times [2020-10-13 04:48:16,376 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:16,376 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [513164199] [2020-10-13 04:48:16,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:16,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:16,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,435 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:16,459 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:21,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 137 [2020-10-13 04:48:21,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:21,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-13 04:48:21,447 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 15 [2020-10-13 04:48:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:21,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 28 [2020-10-13 04:48:21,448 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:21,617 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:21,619 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:21,621 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:21,622 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:21,630 INFO L134 CoverageAnalysis]: Checked inductivity of 757 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-13 04:48:21,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [513164199] [2020-10-13 04:48:21,631 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:21,631 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-10-13 04:48:21,631 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857836713] [2020-10-13 04:48:21,632 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-13 04:48:21,632 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:21,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-13 04:48:21,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2020-10-13 04:48:21,632 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand 17 states. [2020-10-13 04:48:21,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:21,768 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2020-10-13 04:48:21,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-13 04:48:21,768 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 129 [2020-10-13 04:48:21,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:21,769 INFO L225 Difference]: With dead ends: 238 [2020-10-13 04:48:21,769 INFO L226 Difference]: Without dead ends: 137 [2020-10-13 04:48:21,770 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 04:48:21,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-10-13 04:48:21,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2020-10-13 04:48:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-13 04:48:21,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2020-10-13 04:48:21,777 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 129 [2020-10-13 04:48:21,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:21,777 INFO L479 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2020-10-13 04:48:21,777 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-13 04:48:21,777 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2020-10-13 04:48:21,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2020-10-13 04:48:21,779 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:21,779 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:21,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2020-10-13 04:48:21,780 INFO L427 AbstractCegarLoop]: === Iteration 30 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:21,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:21,780 INFO L82 PathProgramCache]: Analyzing trace with hash -711489826, now seen corresponding path program 27 times [2020-10-13 04:48:21,780 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:21,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988397435] [2020-10-13 04:48:21,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:21,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:21,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:21,855 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:26,891 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:26,891 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 139 [2020-10-13 04:48:26,891 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:26,892 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5094 [2020-10-13 04:48:26,892 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:26,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:48:26,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 71 [2020-10-13 04:48:26,892 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:48:26,892 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:27,082 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:27,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:27,084 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,085 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:27,085 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:27,085 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:27,085 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:27,086 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:27,086 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:27,086 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:27,094 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 588 trivial. 0 not checked. [2020-10-13 04:48:27,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988397435] [2020-10-13 04:48:27,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:27,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:48:27,095 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084899973] [2020-10-13 04:48:27,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:48:27,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:27,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:48:27,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:27,096 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand 18 states. [2020-10-13 04:48:27,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:27,387 INFO L93 Difference]: Finished difference Result 216 states and 225 transitions. [2020-10-13 04:48:27,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:48:27,387 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 131 [2020-10-13 04:48:27,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:27,389 INFO L225 Difference]: With dead ends: 216 [2020-10-13 04:48:27,390 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 04:48:27,391 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 04:48:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 04:48:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 142. [2020-10-13 04:48:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-13 04:48:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 146 transitions. [2020-10-13 04:48:27,397 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 146 transitions. Word has length 131 [2020-10-13 04:48:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:27,397 INFO L479 AbstractCegarLoop]: Abstraction has 142 states and 146 transitions. [2020-10-13 04:48:27,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:48:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 146 transitions. [2020-10-13 04:48:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2020-10-13 04:48:27,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:27,398 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:27,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2020-10-13 04:48:27,399 INFO L427 AbstractCegarLoop]: === Iteration 31 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:27,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:27,399 INFO L82 PathProgramCache]: Analyzing trace with hash -1550410952, now seen corresponding path program 28 times [2020-10-13 04:48:27,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:27,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518137428] [2020-10-13 04:48:27,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:27,427 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,456 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:27,499 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,520 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:32,520 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 145 [2020-10-13 04:48:32,520 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:32,520 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5101 [2020-10-13 04:48:32,521 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:32,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-10-13 04:48:32,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:32,521 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-10-13 04:48:32,521 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:32,722 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:32,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:32,724 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:32,726 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:32,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:32,727 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:48:32,727 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:32,727 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:32,727 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 871 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-13 04:48:32,737 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518137428] [2020-10-13 04:48:32,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:32,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-10-13 04:48:32,737 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089709894] [2020-10-13 04:48:32,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-13 04:48:32,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:32,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-13 04:48:32,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2020-10-13 04:48:32,738 INFO L87 Difference]: Start difference. First operand 142 states and 146 transitions. Second operand 18 states. [2020-10-13 04:48:32,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:32,908 INFO L93 Difference]: Finished difference Result 252 states and 260 transitions. [2020-10-13 04:48:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-13 04:48:32,909 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 137 [2020-10-13 04:48:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:32,911 INFO L225 Difference]: With dead ends: 252 [2020-10-13 04:48:32,911 INFO L226 Difference]: Without dead ends: 145 [2020-10-13 04:48:32,911 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 04:48:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-10-13 04:48:32,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2020-10-13 04:48:32,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-13 04:48:32,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2020-10-13 04:48:32,918 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 137 [2020-10-13 04:48:32,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:32,918 INFO L479 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2020-10-13 04:48:32,918 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-13 04:48:32,918 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2020-10-13 04:48:32,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2020-10-13 04:48:32,919 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:32,919 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:32,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2020-10-13 04:48:32,920 INFO L427 AbstractCegarLoop]: === Iteration 32 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:32,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:32,920 INFO L82 PathProgramCache]: Analyzing trace with hash -361776938, now seen corresponding path program 29 times [2020-10-13 04:48:32,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:32,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663516362] [2020-10-13 04:48:32,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:32,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:32,942 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:32,993 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:33,028 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:37,990 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:37,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 147 [2020-10-13 04:48:37,991 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:37,991 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5056 [2020-10-13 04:48:37,991 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:37,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:48:37,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:37,991 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:48:37,992 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:38,200 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:38,202 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,204 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:38,204 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:38,204 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:38,204 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:38,204 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:38,204 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:38,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:38,205 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:38,205 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:38,215 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 675 trivial. 0 not checked. [2020-10-13 04:48:38,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663516362] [2020-10-13 04:48:38,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:38,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:48:38,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008197281] [2020-10-13 04:48:38,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:48:38,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:38,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:48:38,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:38,217 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand 19 states. [2020-10-13 04:48:38,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:38,404 INFO L93 Difference]: Finished difference Result 254 states and 262 transitions. [2020-10-13 04:48:38,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:48:38,405 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 139 [2020-10-13 04:48:38,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:38,406 INFO L225 Difference]: With dead ends: 254 [2020-10-13 04:48:38,406 INFO L226 Difference]: Without dead ends: 147 [2020-10-13 04:48:38,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:38,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-13 04:48:38,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 146. [2020-10-13 04:48:38,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-13 04:48:38,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 150 transitions. [2020-10-13 04:48:38,416 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 150 transitions. Word has length 139 [2020-10-13 04:48:38,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:38,416 INFO L479 AbstractCegarLoop]: Abstraction has 146 states and 150 transitions. [2020-10-13 04:48:38,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:48:38,416 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 150 transitions. [2020-10-13 04:48:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2020-10-13 04:48:38,418 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:38,418 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:38,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2020-10-13 04:48:38,419 INFO L427 AbstractCegarLoop]: === Iteration 33 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:38,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:38,423 INFO L82 PathProgramCache]: Analyzing trace with hash -545790220, now seen corresponding path program 30 times [2020-10-13 04:48:38,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:38,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1233450237] [2020-10-13 04:48:38,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:38,481 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,544 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:38,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:43,608 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:43,609 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 149 [2020-10-13 04:48:43,609 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:43,609 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5142 [2020-10-13 04:48:43,609 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:43,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 17 [2020-10-13 04:48:43,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:48:43,609 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-10-13 04:48:43,609 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:43,820 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:43,822 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:43,823 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:43,823 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:43,824 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:43,824 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:43,824 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:43,824 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:43,824 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:43,833 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2020-10-13 04:48:43,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1233450237] [2020-10-13 04:48:43,834 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:43,834 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-10-13 04:48:43,834 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314744586] [2020-10-13 04:48:43,834 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-13 04:48:43,834 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:43,834 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-13 04:48:43,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:43,835 INFO L87 Difference]: Start difference. First operand 146 states and 150 transitions. Second operand 19 states. [2020-10-13 04:48:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:44,152 INFO L93 Difference]: Finished difference Result 230 states and 239 transitions. [2020-10-13 04:48:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-13 04:48:44,152 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 141 [2020-10-13 04:48:44,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:44,154 INFO L225 Difference]: With dead ends: 230 [2020-10-13 04:48:44,154 INFO L226 Difference]: Without dead ends: 155 [2020-10-13 04:48:44,155 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2020-10-13 04:48:44,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-13 04:48:44,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 152. [2020-10-13 04:48:44,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-13 04:48:44,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2020-10-13 04:48:44,161 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 141 [2020-10-13 04:48:44,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:44,161 INFO L479 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2020-10-13 04:48:44,161 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-13 04:48:44,161 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2020-10-13 04:48:44,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2020-10-13 04:48:44,162 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:44,162 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:44,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2020-10-13 04:48:44,163 INFO L427 AbstractCegarLoop]: === Iteration 34 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:44,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:44,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1879298766, now seen corresponding path program 31 times [2020-10-13 04:48:44,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:44,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [999530555] [2020-10-13 04:48:44,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:44,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:44,190 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,219 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:44,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:49,247 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:49,247 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 155 [2020-10-13 04:48:49,248 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:49,248 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5065 [2020-10-13 04:48:49,248 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:48:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 45 [2020-10-13 04:48:49,248 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:48:49,248 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:49,481 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:49,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:49,483 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:49,484 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:49,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 768 trivial. 0 not checked. [2020-10-13 04:48:49,496 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [999530555] [2020-10-13 04:48:49,496 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:49,496 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:48:49,496 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001398503] [2020-10-13 04:48:49,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:48:49,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:49,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:48:49,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:49,497 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand 20 states. [2020-10-13 04:48:49,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:49,821 INFO L93 Difference]: Finished difference Result 240 states and 249 transitions. [2020-10-13 04:48:49,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:48:49,821 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 147 [2020-10-13 04:48:49,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:49,823 INFO L225 Difference]: With dead ends: 240 [2020-10-13 04:48:49,823 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 04:48:49,824 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 04:48:49,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 04:48:49,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 158. [2020-10-13 04:48:49,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-13 04:48:49,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2020-10-13 04:48:49,832 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 147 [2020-10-13 04:48:49,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:49,832 INFO L479 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2020-10-13 04:48:49,832 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:48:49,832 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2020-10-13 04:48:49,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2020-10-13 04:48:49,833 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:49,833 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:49,834 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2020-10-13 04:48:49,834 INFO L427 AbstractCegarLoop]: === Iteration 35 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:49,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:49,834 INFO L82 PathProgramCache]: Analyzing trace with hash -110775512, now seen corresponding path program 32 times [2020-10-13 04:48:49,835 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:49,835 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859188145] [2020-10-13 04:48:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:49,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:49,860 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:49,902 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:49,935 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:54,885 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:54,885 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 161 [2020-10-13 04:48:54,885 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:48:54,885 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5034 [2020-10-13 04:48:54,886 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-10-13 04:48:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:48:54,886 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-10-13 04:48:54,886 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:55,115 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:48:55,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:55,116 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:55,118 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:48:55,118 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:48:55,118 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:48:55,118 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:48:55,118 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:48:55,118 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:48:55,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:48:55,119 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:48:55,119 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:48:55,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1123 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-10-13 04:48:55,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859188145] [2020-10-13 04:48:55,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:48:55,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20] total 20 [2020-10-13 04:48:55,131 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083391011] [2020-10-13 04:48:55,131 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-13 04:48:55,131 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:48:55,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-13 04:48:55,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2020-10-13 04:48:55,132 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand 20 states. [2020-10-13 04:48:55,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:48:55,314 INFO L93 Difference]: Finished difference Result 280 states and 288 transitions. [2020-10-13 04:48:55,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-13 04:48:55,315 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 153 [2020-10-13 04:48:55,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:48:55,316 INFO L225 Difference]: With dead ends: 280 [2020-10-13 04:48:55,316 INFO L226 Difference]: Without dead ends: 161 [2020-10-13 04:48:55,317 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 04:48:55,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-13 04:48:55,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2020-10-13 04:48:55,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-13 04:48:55,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 164 transitions. [2020-10-13 04:48:55,322 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 164 transitions. Word has length 153 [2020-10-13 04:48:55,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:48:55,323 INFO L479 AbstractCegarLoop]: Abstraction has 160 states and 164 transitions. [2020-10-13 04:48:55,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-13 04:48:55,323 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 164 transitions. [2020-10-13 04:48:55,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2020-10-13 04:48:55,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:48:55,324 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:48:55,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2020-10-13 04:48:55,325 INFO L427 AbstractCegarLoop]: === Iteration 36 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:48:55,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:48:55,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1966855366, now seen corresponding path program 33 times [2020-10-13 04:48:55,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:48:55,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [968644536] [2020-10-13 04:48:55,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:48:55,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:48:55,359 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:55,421 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:48:55,495 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:00,421 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:00,422 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 163 [2020-10-13 04:49:00,422 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:00,422 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5075 [2020-10-13 04:49:00,422 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:49:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:00,422 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:49:00,422 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:00,674 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:00,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:00,676 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:00,678 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:00,678 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:00,678 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:00,678 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:00,678 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:00,678 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:00,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:00,679 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:00,679 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:00,694 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 867 trivial. 0 not checked. [2020-10-13 04:49:00,694 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [968644536] [2020-10-13 04:49:00,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:00,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:49:00,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079279150] [2020-10-13 04:49:00,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:49:00,695 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:00,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:49:00,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:00,696 INFO L87 Difference]: Start difference. First operand 160 states and 164 transitions. Second operand 21 states. [2020-10-13 04:49:00,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:00,889 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2020-10-13 04:49:00,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:49:00,890 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 155 [2020-10-13 04:49:00,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:00,891 INFO L225 Difference]: With dead ends: 282 [2020-10-13 04:49:00,891 INFO L226 Difference]: Without dead ends: 163 [2020-10-13 04:49:00,892 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 04:49:00,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-13 04:49:00,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 162. [2020-10-13 04:49:00,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-13 04:49:00,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 166 transitions. [2020-10-13 04:49:00,898 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 166 transitions. Word has length 155 [2020-10-13 04:49:00,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:00,898 INFO L479 AbstractCegarLoop]: Abstraction has 162 states and 166 transitions. [2020-10-13 04:49:00,898 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:49:00,898 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 166 transitions. [2020-10-13 04:49:00,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2020-10-13 04:49:00,899 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:00,899 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:00,899 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2020-10-13 04:49:00,899 INFO L427 AbstractCegarLoop]: === Iteration 37 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:00,899 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:00,899 INFO L82 PathProgramCache]: Analyzing trace with hash 1410336484, now seen corresponding path program 34 times [2020-10-13 04:49:00,899 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:00,900 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1249259836] [2020-10-13 04:49:00,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:00,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:00,928 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:00,969 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:01,003 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:05,950 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:05,950 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 165 [2020-10-13 04:49:05,950 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:05,950 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5030 [2020-10-13 04:49:05,950 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 19 [2020-10-13 04:49:05,950 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:49:05,951 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 36 [2020-10-13 04:49:05,951 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:06,270 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:06,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:06,275 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:06,275 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:06,275 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:06,276 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-10-13 04:49:06,276 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:06,276 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:06,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:06,277 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:06,277 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 902 trivial. 0 not checked. [2020-10-13 04:49:06,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1249259836] [2020-10-13 04:49:06,310 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:06,311 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-10-13 04:49:06,312 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602871149] [2020-10-13 04:49:06,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-13 04:49:06,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:06,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-13 04:49:06,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2020-10-13 04:49:06,315 INFO L87 Difference]: Start difference. First operand 162 states and 166 transitions. Second operand 21 states. [2020-10-13 04:49:06,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:06,658 INFO L93 Difference]: Finished difference Result 254 states and 263 transitions. [2020-10-13 04:49:06,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-13 04:49:06,659 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 157 [2020-10-13 04:49:06,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:06,660 INFO L225 Difference]: With dead ends: 254 [2020-10-13 04:49:06,660 INFO L226 Difference]: Without dead ends: 171 [2020-10-13 04:49:06,661 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 04:49:06,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-13 04:49:06,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2020-10-13 04:49:06,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-13 04:49:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 172 transitions. [2020-10-13 04:49:06,672 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 172 transitions. Word has length 157 [2020-10-13 04:49:06,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:06,673 INFO L479 AbstractCegarLoop]: Abstraction has 168 states and 172 transitions. [2020-10-13 04:49:06,673 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-13 04:49:06,673 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 172 transitions. [2020-10-13 04:49:06,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2020-10-13 04:49:06,674 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:06,674 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:06,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2020-10-13 04:49:06,675 INFO L427 AbstractCegarLoop]: === Iteration 38 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:06,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:06,675 INFO L82 PathProgramCache]: Analyzing trace with hash 318750398, now seen corresponding path program 35 times [2020-10-13 04:49:06,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:06,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1303673536] [2020-10-13 04:49:06,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:06,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:06,707 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:06,742 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:06,779 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:11,755 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:11,755 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 171 [2020-10-13 04:49:11,755 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:11,755 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5057 [2020-10-13 04:49:11,755 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:11,755 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:49:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 49 [2020-10-13 04:49:11,756 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:49:11,756 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:12,067 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:12,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:12,068 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:12,069 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:12,069 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:12,069 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:12,070 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:12,070 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:12,071 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:12,072 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:12,089 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 972 trivial. 0 not checked. [2020-10-13 04:49:12,090 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1303673536] [2020-10-13 04:49:12,090 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:12,090 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:49:12,090 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244243035] [2020-10-13 04:49:12,092 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:49:12,092 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:49:12,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:12,093 INFO L87 Difference]: Start difference. First operand 168 states and 172 transitions. Second operand 22 states. [2020-10-13 04:49:12,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:12,474 INFO L93 Difference]: Finished difference Result 264 states and 273 transitions. [2020-10-13 04:49:12,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:49:12,475 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 163 [2020-10-13 04:49:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:12,477 INFO L225 Difference]: With dead ends: 264 [2020-10-13 04:49:12,477 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 04:49:12,478 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 04:49:12,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 04:49:12,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 174. [2020-10-13 04:49:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-13 04:49:12,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 178 transitions. [2020-10-13 04:49:12,484 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 178 transitions. Word has length 163 [2020-10-13 04:49:12,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:12,484 INFO L479 AbstractCegarLoop]: Abstraction has 174 states and 178 transitions. [2020-10-13 04:49:12,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:49:12,485 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 178 transitions. [2020-10-13 04:49:12,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2020-10-13 04:49:12,485 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:12,486 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:12,486 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2020-10-13 04:49:12,486 INFO L427 AbstractCegarLoop]: === Iteration 39 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:12,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:12,487 INFO L82 PathProgramCache]: Analyzing trace with hash -1377015016, now seen corresponding path program 36 times [2020-10-13 04:49:12,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:12,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1299270087] [2020-10-13 04:49:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:12,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:12,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:12,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:12,657 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:17,763 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:17,763 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 177 [2020-10-13 04:49:17,763 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:17,764 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5253 [2020-10-13 04:49:17,764 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-10-13 04:49:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:17,764 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-10-13 04:49:17,764 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:18,048 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:18,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:18,049 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:18,050 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:18,051 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:18,051 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:18,051 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:18,051 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:18,051 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:18,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:18,052 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:18,052 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:18,065 INFO L134 CoverageAnalysis]: Checked inductivity of 1407 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-13 04:49:18,065 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1299270087] [2020-10-13 04:49:18,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:18,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22] total 22 [2020-10-13 04:49:18,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152771422] [2020-10-13 04:49:18,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-13 04:49:18,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:18,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-13 04:49:18,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2020-10-13 04:49:18,066 INFO L87 Difference]: Start difference. First operand 174 states and 178 transitions. Second operand 22 states. [2020-10-13 04:49:18,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:18,267 INFO L93 Difference]: Finished difference Result 308 states and 316 transitions. [2020-10-13 04:49:18,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-13 04:49:18,268 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 169 [2020-10-13 04:49:18,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:18,269 INFO L225 Difference]: With dead ends: 308 [2020-10-13 04:49:18,269 INFO L226 Difference]: Without dead ends: 177 [2020-10-13 04:49:18,270 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 04:49:18,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-13 04:49:18,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2020-10-13 04:49:18,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-13 04:49:18,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2020-10-13 04:49:18,277 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 169 [2020-10-13 04:49:18,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:18,277 INFO L479 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2020-10-13 04:49:18,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-13 04:49:18,277 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2020-10-13 04:49:18,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2020-10-13 04:49:18,278 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:18,278 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:18,278 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2020-10-13 04:49:18,279 INFO L427 AbstractCegarLoop]: === Iteration 40 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:18,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:18,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1815580854, now seen corresponding path program 37 times [2020-10-13 04:49:18,279 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:18,279 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1267368335] [2020-10-13 04:49:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:18,326 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:18,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:18,478 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:23,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:23,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 179 [2020-10-13 04:49:23,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:23,390 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5083 [2020-10-13 04:49:23,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:23,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:49:23,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:23,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:49:23,391 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:23,692 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:23,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:23,694 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:23,695 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:23,695 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:23,695 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:23,695 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:23,696 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:23,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:23,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:23,696 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:23,696 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1083 trivial. 0 not checked. [2020-10-13 04:49:23,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1267368335] [2020-10-13 04:49:23,715 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:23,715 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:49:23,715 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130360723] [2020-10-13 04:49:23,716 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:49:23,716 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:23,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:49:23,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:23,717 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand 23 states. [2020-10-13 04:49:23,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:23,872 INFO L93 Difference]: Finished difference Result 310 states and 318 transitions. [2020-10-13 04:49:23,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:49:23,872 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 171 [2020-10-13 04:49:23,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:23,874 INFO L225 Difference]: With dead ends: 310 [2020-10-13 04:49:23,874 INFO L226 Difference]: Without dead ends: 179 [2020-10-13 04:49:23,875 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 04:49:23,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-13 04:49:23,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2020-10-13 04:49:23,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 178 states. [2020-10-13 04:49:23,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2020-10-13 04:49:23,883 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 171 [2020-10-13 04:49:23,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:23,884 INFO L479 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2020-10-13 04:49:23,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:49:23,884 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2020-10-13 04:49:23,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2020-10-13 04:49:23,886 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:23,886 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:23,886 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2020-10-13 04:49:23,887 INFO L427 AbstractCegarLoop]: === Iteration 41 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:23,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:23,887 INFO L82 PathProgramCache]: Analyzing trace with hash -1001404716, now seen corresponding path program 38 times [2020-10-13 04:49:23,887 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:23,888 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [622151836] [2020-10-13 04:49:23,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:23,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:23,933 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:24,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:24,089 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:28,956 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:28,957 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 181 [2020-10-13 04:49:28,957 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:28,957 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5040 [2020-10-13 04:49:28,957 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:28,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 21 [2020-10-13 04:49:28,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 93 [2020-10-13 04:49:28,957 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 40 [2020-10-13 04:49:28,958 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:29,259 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:29,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:29,261 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:29,262 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:29,263 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:29,263 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:29,263 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:29,263 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:29,264 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:29,265 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:29,279 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 1122 trivial. 0 not checked. [2020-10-13 04:49:29,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [622151836] [2020-10-13 04:49:29,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:29,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-10-13 04:49:29,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495646379] [2020-10-13 04:49:29,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-13 04:49:29,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:29,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-13 04:49:29,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2020-10-13 04:49:29,281 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand 23 states. [2020-10-13 04:49:29,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:29,663 INFO L93 Difference]: Finished difference Result 278 states and 287 transitions. [2020-10-13 04:49:29,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-13 04:49:29,663 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 173 [2020-10-13 04:49:29,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:29,666 INFO L225 Difference]: With dead ends: 278 [2020-10-13 04:49:29,666 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 04:49:29,667 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 04:49:29,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 04:49:29,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 184. [2020-10-13 04:49:29,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 184 states. [2020-10-13 04:49:29,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2020-10-13 04:49:29,673 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 173 [2020-10-13 04:49:29,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:29,673 INFO L479 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2020-10-13 04:49:29,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-13 04:49:29,674 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2020-10-13 04:49:29,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2020-10-13 04:49:29,675 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:29,675 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:29,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2020-10-13 04:49:29,675 INFO L427 AbstractCegarLoop]: === Iteration 42 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:29,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:29,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1379186002, now seen corresponding path program 39 times [2020-10-13 04:49:29,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:29,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808093573] [2020-10-13 04:49:29,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:29,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:29,710 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:29,756 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:29,808 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:34,793 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:34,793 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 187 [2020-10-13 04:49:34,793 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:34,793 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5096 [2020-10-13 04:49:34,794 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:34,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:49:34,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:34,794 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:49:34,794 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:35,122 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:35,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:35,123 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:35,124 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:35,124 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:35,124 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:35,124 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:35,125 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:35,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:35,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:35,125 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:35,125 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:35,145 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2020-10-13 04:49:35,145 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808093573] [2020-10-13 04:49:35,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:35,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:49:35,146 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658923021] [2020-10-13 04:49:35,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:49:35,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:35,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:49:35,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:35,147 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand 24 states. [2020-10-13 04:49:35,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:35,387 INFO L93 Difference]: Finished difference Result 324 states and 332 transitions. [2020-10-13 04:49:35,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:49:35,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 179 [2020-10-13 04:49:35,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:35,389 INFO L225 Difference]: With dead ends: 324 [2020-10-13 04:49:35,389 INFO L226 Difference]: Without dead ends: 187 [2020-10-13 04:49:35,390 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:35,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-13 04:49:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 186. [2020-10-13 04:49:35,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 186 states. [2020-10-13 04:49:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2020-10-13 04:49:35,395 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 179 [2020-10-13 04:49:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:35,396 INFO L479 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2020-10-13 04:49:35,396 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:49:35,396 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2020-10-13 04:49:35,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2020-10-13 04:49:35,397 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:35,397 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:35,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2020-10-13 04:49:35,397 INFO L427 AbstractCegarLoop]: === Iteration 43 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:35,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1028817612, now seen corresponding path program 40 times [2020-10-13 04:49:35,398 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:35,398 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [632354128] [2020-10-13 04:49:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:35,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:35,437 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:35,494 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:35,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:40,515 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:40,515 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 189 [2020-10-13 04:49:40,515 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:40,516 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5093 [2020-10-13 04:49:40,516 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:40,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-10-13 04:49:40,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 97 [2020-10-13 04:49:40,516 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-10-13 04:49:40,516 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:40,843 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:40,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:40,845 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:40,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:40,847 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:40,847 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:40,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:40,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:40,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:40,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:40,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 1241 trivial. 0 not checked. [2020-10-13 04:49:40,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [632354128] [2020-10-13 04:49:40,862 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:40,862 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24] total 24 [2020-10-13 04:49:40,863 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165807881] [2020-10-13 04:49:40,863 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-13 04:49:40,863 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:40,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-13 04:49:40,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:40,864 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand 24 states. [2020-10-13 04:49:41,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:41,236 INFO L93 Difference]: Finished difference Result 290 states and 299 transitions. [2020-10-13 04:49:41,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-13 04:49:41,236 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 181 [2020-10-13 04:49:41,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:41,238 INFO L225 Difference]: With dead ends: 290 [2020-10-13 04:49:41,239 INFO L226 Difference]: Without dead ends: 195 [2020-10-13 04:49:41,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2020-10-13 04:49:41,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-13 04:49:41,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2020-10-13 04:49:41,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2020-10-13 04:49:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2020-10-13 04:49:41,246 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 181 [2020-10-13 04:49:41,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:41,246 INFO L479 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2020-10-13 04:49:41,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-13 04:49:41,247 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2020-10-13 04:49:41,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2020-10-13 04:49:41,248 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:41,248 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:41,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2020-10-13 04:49:41,248 INFO L427 AbstractCegarLoop]: === Iteration 44 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:41,249 INFO L82 PathProgramCache]: Analyzing trace with hash 245558438, now seen corresponding path program 41 times [2020-10-13 04:49:41,249 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:41,249 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [834785562] [2020-10-13 04:49:41,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:41,284 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:41,340 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:41,413 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:46,448 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:46,448 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 195 [2020-10-13 04:49:46,448 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:46,448 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5176 [2020-10-13 04:49:46,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:46,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:49:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 55 [2020-10-13 04:49:46,449 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:49:46,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:46,807 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:46,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:46,809 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:46,810 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:46,811 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:46,811 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:46,811 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:46,812 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:46,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:46,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:46,812 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:46,813 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-10-13 04:49:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1323 trivial. 0 not checked. [2020-10-13 04:49:46,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [834785562] [2020-10-13 04:49:46,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:46,846 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:49:46,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792878410] [2020-10-13 04:49:46,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:49:46,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:46,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:49:46,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:46,849 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand 25 states. [2020-10-13 04:49:47,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:47,250 INFO L93 Difference]: Finished difference Result 300 states and 309 transitions. [2020-10-13 04:49:47,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:49:47,251 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 187 [2020-10-13 04:49:47,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:47,252 INFO L225 Difference]: With dead ends: 300 [2020-10-13 04:49:47,252 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 04:49:47,253 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 04:49:47,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 04:49:47,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 198. [2020-10-13 04:49:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 198 states. [2020-10-13 04:49:47,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 202 transitions. [2020-10-13 04:49:47,260 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 202 transitions. Word has length 187 [2020-10-13 04:49:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:47,260 INFO L479 AbstractCegarLoop]: Abstraction has 198 states and 202 transitions. [2020-10-13 04:49:47,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:49:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 202 transitions. [2020-10-13 04:49:47,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2020-10-13 04:49:47,261 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:47,262 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:47,262 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2020-10-13 04:49:47,262 INFO L427 AbstractCegarLoop]: === Iteration 45 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:47,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:47,262 INFO L82 PathProgramCache]: Analyzing trace with hash -244659456, now seen corresponding path program 42 times [2020-10-13 04:49:47,263 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:47,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689260200] [2020-10-13 04:49:47,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:47,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:47,291 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:47,330 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:47,377 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:52,500 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:52,500 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 201 [2020-10-13 04:49:52,500 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:52,500 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5217 [2020-10-13 04:49:52,501 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:52,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 23 [2020-10-13 04:49:52,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:49:52,501 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 44 [2020-10-13 04:49:52,501 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:52,850 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:52,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:52,852 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:52,853 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:52,853 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:52,853 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:52,854 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:52,854 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:52,854 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:52,854 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:52,870 INFO L134 CoverageAnalysis]: Checked inductivity of 1893 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-13 04:49:52,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689260200] [2020-10-13 04:49:52,870 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:52,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-10-13 04:49:52,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552981237] [2020-10-13 04:49:52,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-10-13 04:49:52,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:52,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-10-13 04:49:52,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2020-10-13 04:49:52,872 INFO L87 Difference]: Start difference. First operand 198 states and 202 transitions. Second operand 25 states. [2020-10-13 04:49:53,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:53,122 INFO L93 Difference]: Finished difference Result 350 states and 358 transitions. [2020-10-13 04:49:53,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-13 04:49:53,123 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 193 [2020-10-13 04:49:53,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:53,124 INFO L225 Difference]: With dead ends: 350 [2020-10-13 04:49:53,124 INFO L226 Difference]: Without dead ends: 201 [2020-10-13 04:49:53,125 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 04:49:53,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-13 04:49:53,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2020-10-13 04:49:53,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 200 states. [2020-10-13 04:49:53,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2020-10-13 04:49:53,132 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 193 [2020-10-13 04:49:53,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:53,132 INFO L479 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2020-10-13 04:49:53,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-10-13 04:49:53,133 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2020-10-13 04:49:53,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2020-10-13 04:49:53,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:53,135 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:53,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2020-10-13 04:49:53,136 INFO L427 AbstractCegarLoop]: === Iteration 46 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:53,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:53,136 INFO L82 PathProgramCache]: Analyzing trace with hash -811174242, now seen corresponding path program 43 times [2020-10-13 04:49:53,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:53,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689045221] [2020-10-13 04:49:53,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:53,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:53,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:53,302 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:53,400 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:58,217 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:58,218 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 203 [2020-10-13 04:49:58,218 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:49:58,218 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5046 [2020-10-13 04:49:58,218 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:58,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:49:58,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 57 [2020-10-13 04:49:58,218 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:49:58,218 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:58,672 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:49:58,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:58,675 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:58,676 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:49:58,676 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:49:58,676 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:49:58,676 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:49:58,677 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:49:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:49:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:49:58,677 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:49:58,677 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:49:58,708 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1452 trivial. 0 not checked. [2020-10-13 04:49:58,709 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689045221] [2020-10-13 04:49:58,710 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:49:58,710 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:49:58,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641008187] [2020-10-13 04:49:58,711 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:49:58,711 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:49:58,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:49:58,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:58,712 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand 26 states. [2020-10-13 04:49:59,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:49:59,084 INFO L93 Difference]: Finished difference Result 312 states and 321 transitions. [2020-10-13 04:49:59,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:49:59,085 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 195 [2020-10-13 04:49:59,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:49:59,087 INFO L225 Difference]: With dead ends: 312 [2020-10-13 04:49:59,087 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 04:49:59,088 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:49:59,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 04:49:59,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2020-10-13 04:49:59,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 206 states. [2020-10-13 04:49:59,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2020-10-13 04:49:59,093 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 195 [2020-10-13 04:49:59,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:49:59,094 INFO L479 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2020-10-13 04:49:59,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:49:59,094 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2020-10-13 04:49:59,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2020-10-13 04:49:59,095 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:49:59,095 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:49:59,096 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2020-10-13 04:49:59,096 INFO L427 AbstractCegarLoop]: === Iteration 47 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:49:59,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:49:59,096 INFO L82 PathProgramCache]: Analyzing trace with hash -1876903176, now seen corresponding path program 44 times [2020-10-13 04:49:59,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:49:59,097 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739926223] [2020-10-13 04:49:59,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:49:59,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:49:59,132 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:59,186 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:49:59,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:04,152 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:04,152 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 209 [2020-10-13 04:50:04,152 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-10-13 04:50:04,152 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 5033 [2020-10-13 04:50:04,152 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:04,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-10-13 04:50:04,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-10-13 04:50:04,153 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-10-13 04:50:04,153 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:04,537 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-10-13 04:50:04,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:04,539 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:04,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-10-13 04:50:04,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-10-13 04:50:04,540 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-10-13 04:50:04,540 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-10-13 04:50:04,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: NARROWEST [2020-10-13 04:50:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-10-13 04:50:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 1 [2020-10-13 04:50:04,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-10-13 04:50:04,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-10-13 04:50:04,558 INFO L134 CoverageAnalysis]: Checked inductivity of 2071 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 1587 trivial. 0 not checked. [2020-10-13 04:50:04,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739926223] [2020-10-13 04:50:04,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-10-13 04:50:04,558 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26] total 26 [2020-10-13 04:50:04,558 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528736613] [2020-10-13 04:50:04,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-10-13 04:50:04,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-10-13 04:50:04,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-10-13 04:50:04,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2020-10-13 04:50:04,559 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand 26 states. [2020-10-13 04:50:04,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-13 04:50:04,736 INFO L93 Difference]: Finished difference Result 364 states and 372 transitions. [2020-10-13 04:50:04,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-13 04:50:04,737 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 201 [2020-10-13 04:50:04,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-13 04:50:04,738 INFO L225 Difference]: With dead ends: 364 [2020-10-13 04:50:04,739 INFO L226 Difference]: Without dead ends: 209 [2020-10-13 04:50:04,740 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 04:50:04,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-13 04:50:04,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2020-10-13 04:50:04,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 208 states. [2020-10-13 04:50:04,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 212 transitions. [2020-10-13 04:50:04,746 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 212 transitions. Word has length 201 [2020-10-13 04:50:04,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-13 04:50:04,746 INFO L479 AbstractCegarLoop]: Abstraction has 208 states and 212 transitions. [2020-10-13 04:50:04,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-10-13 04:50:04,746 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 212 transitions. [2020-10-13 04:50:04,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2020-10-13 04:50:04,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-13 04:50:04,748 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-13 04:50:04,748 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2020-10-13 04:50:04,748 INFO L427 AbstractCegarLoop]: === Iteration 48 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-13 04:50:04,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-13 04:50:04,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1002301590, now seen corresponding path program 45 times [2020-10-13 04:50:04,749 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-10-13 04:50:04,749 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [35509621] [2020-10-13 04:50:04,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-13 04:50:04,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-13 04:50:04,786 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:04,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-10-13 04:50:04,882 FATAL L256 erpolLogProxyWrapper]: Now shrinking...