/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml --traceabstraction.trace.refinement.strategy FIXED_PREFERENCES --traceabstraction.compute.interpolants.along.a.counterexample Craig_NestedInterpolation --traceabstraction.smt.solver Internal_SMTInterpol --traceabstraction.compute.trace.for.counterexample.result false --rcfgbuilder.size.of.a.code.block SingleStatement --traceabstraction.use.minimal.unsat.core.enumeration true --traceabstraction.additional.smt.options produce-proofs=true --traceabstraction.additional.smt.options produce-unsat-cores=true --traceabstraction.additional.smt.options enumeration-timeout=5000 --traceabstraction.additional.smt.options interpolation-heuristic=LOWLEXORDER --traceabstraction.additional.smt.options log-additional-information=true -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/loop-new/count_by_1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-24 21:52:02,585 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-24 21:52:02,590 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-24 21:52:02,638 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-24 21:52:02,639 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-24 21:52:02,651 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-24 21:52:02,654 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-24 21:52:02,658 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-24 21:52:02,661 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-24 21:52:02,665 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-24 21:52:02,666 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-24 21:52:02,667 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-24 21:52:02,667 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-24 21:52:02,671 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-24 21:52:02,675 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-24 21:52:02,677 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-24 21:52:02,679 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-24 21:52:02,680 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-24 21:52:02,682 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-24 21:52:02,692 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-24 21:52:02,695 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-24 21:52:02,696 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-24 21:52:02,699 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-24 21:52:02,700 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-24 21:52:02,703 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-24 21:52:02,706 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-24 21:52:02,706 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-24 21:52:02,707 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-24 21:52:02,708 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-24 21:52:02,710 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-24 21:52:02,710 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-24 21:52:02,711 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-24 21:52:02,712 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-24 21:52:02,713 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-24 21:52:02,714 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-24 21:52:02,715 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-24 21:52:02,716 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-24 21:52:02,716 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-24 21:52:02,716 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-24 21:52:02,717 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-24 21:52:02,719 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-24 21:52:02,720 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-24 21:52:02,773 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-24 21:52:02,773 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-24 21:52:02,776 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-24 21:52:02,776 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-24 21:52:02,776 INFO L138 SettingsManager]: * Use SBE=true [2020-09-24 21:52:02,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-24 21:52:02,777 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-24 21:52:02,777 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-24 21:52:02,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-24 21:52:02,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-24 21:52:02,779 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-24 21:52:02,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-24 21:52:02,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-24 21:52:02,780 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-24 21:52:02,780 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-24 21:52:02,780 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-24 21:52:02,781 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-24 21:52:02,781 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-24 21:52:02,781 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-24 21:52:02,781 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-24 21:52:02,782 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-24 21:52:02,782 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:52:02,782 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-24 21:52:02,782 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-24 21:52:02,782 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-24 21:52:02,783 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-24 21:52:02,783 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-24 21:52:02,783 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-24 21:52:02,783 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-24 21:52:02,783 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> FIXED_PREFERENCES Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Interpolants along a Counterexample -> Craig_NestedInterpolation Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: SMT solver -> Internal_SMTInterpol Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute trace for counterexample result -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> SingleStatement Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Use minimal unsat core enumeration -> true Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Additional SMT options -> produce-proofs=true;produce-unsat-cores=true;enumeration-timeout=5000;interpolation-heuristic=LOWLEXORDER;log-additional-information=true; [2020-09-24 21:52:03,234 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-24 21:52:03,260 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-24 21:52:03,264 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-24 21:52:03,267 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-24 21:52:03,267 INFO L275 PluginConnector]: CDTParser initialized [2020-09-24 21:52:03,270 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-new/count_by_1.i [2020-09-24 21:52:03,372 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffc1f25ae/41a72a250bbd4dca8fd1510a60843ffd/FLAG12f3c6a49 [2020-09-24 21:52:03,935 INFO L306 CDTParser]: Found 1 translation units. [2020-09-24 21:52:03,936 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-new/count_by_1.i [2020-09-24 21:52:03,944 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffc1f25ae/41a72a250bbd4dca8fd1510a60843ffd/FLAG12f3c6a49 [2020-09-24 21:52:04,311 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/ffc1f25ae/41a72a250bbd4dca8fd1510a60843ffd [2020-09-24 21:52:04,325 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-24 21:52:04,331 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-24 21:52:04,332 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-24 21:52:04,333 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-24 21:52:04,337 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-24 21:52:04,338 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,343 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2daff610 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04, skipping insertion in model container [2020-09-24 21:52:04,343 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,353 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-24 21:52:04,378 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-24 21:52:04,602 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:52:04,607 INFO L203 MainTranslator]: Completed pre-run [2020-09-24 21:52:04,623 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-24 21:52:04,638 INFO L208 MainTranslator]: Completed translation [2020-09-24 21:52:04,639 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04 WrapperNode [2020-09-24 21:52:04,639 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-24 21:52:04,640 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-24 21:52:04,640 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-24 21:52:04,640 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-24 21:52:04,656 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,662 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,666 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,671 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,672 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (1/1) ... [2020-09-24 21:52:04,764 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-24 21:52:04,764 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-24 21:52:04,764 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-24 21:52:04,765 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-24 21:52:04,767 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-24 21:52:04,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-24 21:52:04,853 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-24 21:52:04,853 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-24 21:52:04,853 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-24 21:52:04,853 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-24 21:52:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-24 21:52:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-24 21:52:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-24 21:52:04,854 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-24 21:52:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-24 21:52:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-24 21:52:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-24 21:52:04,855 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-24 21:52:05,058 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-24 21:52:05,058 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-24 21:52:05,062 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:52:05 BoogieIcfgContainer [2020-09-24 21:52:05,062 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-24 21:52:05,064 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-24 21:52:05,064 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-24 21:52:05,068 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-24 21:52:05,068 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 09:52:04" (1/3) ... [2020-09-24 21:52:05,069 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3ed44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:52:05, skipping insertion in model container [2020-09-24 21:52:05,069 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 09:52:04" (2/3) ... [2020-09-24 21:52:05,070 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3c3ed44a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 09:52:05, skipping insertion in model container [2020-09-24 21:52:05,070 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 09:52:05" (3/3) ... [2020-09-24 21:52:05,072 INFO L109 eAbstractionObserver]: Analyzing ICFG count_by_1.i [2020-09-24 21:52:05,082 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-24 21:52:05,092 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-24 21:52:05,115 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-24 21:52:05,147 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-24 21:52:05,147 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-24 21:52:05,147 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-24 21:52:05,147 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-24 21:52:05,147 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-24 21:52:05,148 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-24 21:52:05,148 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-24 21:52:05,148 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-24 21:52:05,172 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2020-09-24 21:52:05,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-24 21:52:05,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:05,180 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:05,180 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:05,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:05,187 INFO L82 PathProgramCache]: Analyzing trace with hash 574813456, now seen corresponding path program 1 times [2020-09-24 21:52:05,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:05,197 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033494694] [2020-09-24 21:52:05,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:05,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,320 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:05,368 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-24 21:52:05,369 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:05,369 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 62 [2020-09-24 21:52:05,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:05,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 2 [2020-09-24 21:52:05,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:05,372 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 2 [2020-09-24 21:52:05,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-24 21:52:05,424 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:05,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,428 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,431 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:05,431 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:05,432 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:05,432 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 4 [2020-09-24 21:52:05,432 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:05,432 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:05,433 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:05,433 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:05,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:05,440 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033494694] [2020-09-24 21:52:05,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-24 21:52:05,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-24 21:52:05,444 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518941097] [2020-09-24 21:52:05,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 3 states [2020-09-24 21:52:05,452 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:05,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2020-09-24 21:52:05,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:52:05,474 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 3 states. [2020-09-24 21:52:05,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:05,533 INFO L93 Difference]: Finished difference Result 37 states and 42 transitions. [2020-09-24 21:52:05,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2020-09-24 21:52:05,535 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 11 [2020-09-24 21:52:05,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:05,548 INFO L225 Difference]: With dead ends: 37 [2020-09-24 21:52:05,548 INFO L226 Difference]: Without dead ends: 18 [2020-09-24 21:52:05,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2020-09-24 21:52:05,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2020-09-24 21:52:05,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 16. [2020-09-24 21:52:05,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2020-09-24 21:52:05,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2020-09-24 21:52:05,615 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 11 [2020-09-24 21:52:05,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:05,617 INFO L479 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2020-09-24 21:52:05,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 3 states. [2020-09-24 21:52:05,617 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2020-09-24 21:52:05,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-24 21:52:05,618 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:05,618 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:05,619 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-24 21:52:05,620 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:05,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:05,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1625616653, now seen corresponding path program 1 times [2020-09-24 21:52:05,621 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:05,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669971855] [2020-09-24 21:52:05,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:05,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,679 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,757 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,814 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:05,814 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-24 21:52:05,815 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:05,815 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 155 [2020-09-24 21:52:05,816 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-24 21:52:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:05,817 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 6 [2020-09-24 21:52:05,817 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 2 [2020-09-24 21:52:05,867 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:05,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:05,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:05,872 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:05,873 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:05,873 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:05,873 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:52:05,874 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:05,874 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:05,875 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:05,879 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:05,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669971855] [2020-09-24 21:52:05,880 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:05,880 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-24 21:52:05,881 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42740051] [2020-09-24 21:52:05,883 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-24 21:52:05,883 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:05,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-24 21:52:05,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-24 21:52:05,884 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand 5 states. [2020-09-24 21:52:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:05,959 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2020-09-24 21:52:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-09-24 21:52:05,960 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 15 [2020-09-24 21:52:05,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:05,961 INFO L225 Difference]: With dead ends: 27 [2020-09-24 21:52:05,961 INFO L226 Difference]: Without dead ends: 22 [2020-09-24 21:52:05,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:52:05,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-24 21:52:05,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 20. [2020-09-24 21:52:05,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2020-09-24 21:52:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2020-09-24 21:52:05,969 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 15 [2020-09-24 21:52:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:05,969 INFO L479 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2020-09-24 21:52:05,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-24 21:52:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2020-09-24 21:52:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-24 21:52:05,971 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:05,971 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:05,971 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-24 21:52:05,972 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:05,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:05,972 INFO L82 PathProgramCache]: Analyzing trace with hash 1174316682, now seen corresponding path program 2 times [2020-09-24 21:52:05,973 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:05,973 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2144779146] [2020-09-24 21:52:05,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:05,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:06,013 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,099 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,402 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:06,403 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 28 [2020-09-24 21:52:06,403 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:06,403 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 414 [2020-09-24 21:52:06,403 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:06,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-24 21:52:06,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:06,404 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 10 [2020-09-24 21:52:06,404 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:06,464 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:06,467 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,468 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:06,469 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:06,469 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:06,469 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:52:06,469 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:06,470 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:06,470 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:06,474 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2144779146] [2020-09-24 21:52:06,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:06,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-24 21:52:06,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878836151] [2020-09-24 21:52:06,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-24 21:52:06,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:06,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-24 21:52:06,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2020-09-24 21:52:06,477 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand 7 states. [2020-09-24 21:52:06,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:06,581 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2020-09-24 21:52:06,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-24 21:52:06,582 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 19 [2020-09-24 21:52:06,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:06,584 INFO L225 Difference]: With dead ends: 31 [2020-09-24 21:52:06,584 INFO L226 Difference]: Without dead ends: 26 [2020-09-24 21:52:06,585 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:52:06,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2020-09-24 21:52:06,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 24. [2020-09-24 21:52:06,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-24 21:52:06,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2020-09-24 21:52:06,591 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 19 [2020-09-24 21:52:06,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:06,592 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2020-09-24 21:52:06,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-24 21:52:06,592 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2020-09-24 21:52:06,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-24 21:52:06,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:06,593 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:06,594 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-24 21:52:06,594 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:06,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:06,594 INFO L82 PathProgramCache]: Analyzing trace with hash -199797369, now seen corresponding path program 3 times [2020-09-24 21:52:06,595 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:06,595 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1559055060] [2020-09-24 21:52:06,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:06,610 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,677 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,830 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:06,830 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 32 [2020-09-24 21:52:06,831 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:06,831 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 225 [2020-09-24 21:52:06,831 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:06,831 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-24 21:52:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:06,832 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-24 21:52:06,832 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:06,900 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:06,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:06,903 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:06,904 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:06,905 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:06,905 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:06,905 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:52:06,905 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:06,906 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:06,906 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:06,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1559055060] [2020-09-24 21:52:06,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:06,910 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-24 21:52:06,910 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902851445] [2020-09-24 21:52:06,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-24 21:52:06,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:06,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-24 21:52:06,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-09-24 21:52:06,912 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand 9 states. [2020-09-24 21:52:07,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:07,031 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2020-09-24 21:52:07,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-24 21:52:07,032 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 23 [2020-09-24 21:52:07,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:07,033 INFO L225 Difference]: With dead ends: 35 [2020-09-24 21:52:07,033 INFO L226 Difference]: Without dead ends: 30 [2020-09-24 21:52:07,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=132, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:52:07,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2020-09-24 21:52:07,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 28. [2020-09-24 21:52:07,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2020-09-24 21:52:07,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2020-09-24 21:52:07,039 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 23 [2020-09-24 21:52:07,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:07,040 INFO L479 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2020-09-24 21:52:07,040 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-24 21:52:07,040 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2020-09-24 21:52:07,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-24 21:52:07,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:07,041 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:07,041 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-24 21:52:07,042 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:07,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:07,042 INFO L82 PathProgramCache]: Analyzing trace with hash 2014723588, now seen corresponding path program 4 times [2020-09-24 21:52:07,042 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:07,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1996544833] [2020-09-24 21:52:07,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:07,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:07,058 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,083 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,486 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:07,487 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 36 [2020-09-24 21:52:07,487 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:07,487 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 434 [2020-09-24 21:52:07,488 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-24 21:52:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:07,488 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 18 [2020-09-24 21:52:07,488 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:07,572 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:07,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:07,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,576 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:07,576 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:07,576 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:07,577 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:52:07,577 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:07,577 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:07,578 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:07,581 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1996544833] [2020-09-24 21:52:07,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:07,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-24 21:52:07,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591258823] [2020-09-24 21:52:07,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-24 21:52:07,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:07,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-24 21:52:07,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-09-24 21:52:07,584 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand 11 states. [2020-09-24 21:52:07,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:07,751 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2020-09-24 21:52:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-24 21:52:07,751 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 27 [2020-09-24 21:52:07,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:07,752 INFO L225 Difference]: With dead ends: 39 [2020-09-24 21:52:07,753 INFO L226 Difference]: Without dead ends: 34 [2020-09-24 21:52:07,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=219, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:52:07,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-24 21:52:07,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2020-09-24 21:52:07,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2020-09-24 21:52:07,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2020-09-24 21:52:07,760 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 27 [2020-09-24 21:52:07,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:07,761 INFO L479 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2020-09-24 21:52:07,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-24 21:52:07,761 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2020-09-24 21:52:07,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2020-09-24 21:52:07,762 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:07,763 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:07,763 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-24 21:52:07,763 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:07,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:07,764 INFO L82 PathProgramCache]: Analyzing trace with hash -1723686911, now seen corresponding path program 5 times [2020-09-24 21:52:07,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:07,765 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2041565220] [2020-09-24 21:52:07,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:07,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:07,781 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:07,804 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,169 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:08,169 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 40 [2020-09-24 21:52:08,170 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:08,170 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 394 [2020-09-24 21:52:08,171 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:08,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-24 21:52:08,171 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:08,172 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-24 21:52:08,172 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:08,297 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:08,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:08,299 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,300 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:08,300 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:08,301 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:08,301 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:08,301 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:08,301 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:08,302 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:08,302 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:08,305 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:08,306 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2041565220] [2020-09-24 21:52:08,307 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:08,307 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13] total 13 [2020-09-24 21:52:08,307 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730136346] [2020-09-24 21:52:08,308 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-24 21:52:08,308 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:08,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-24 21:52:08,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-09-24 21:52:08,309 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand 13 states. [2020-09-24 21:52:08,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:08,498 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2020-09-24 21:52:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-24 21:52:08,499 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 31 [2020-09-24 21:52:08,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:08,500 INFO L225 Difference]: With dead ends: 43 [2020-09-24 21:52:08,500 INFO L226 Difference]: Without dead ends: 38 [2020-09-24 21:52:08,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=328, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:52:08,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-09-24 21:52:08,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2020-09-24 21:52:08,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-24 21:52:08,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2020-09-24 21:52:08,507 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 31 [2020-09-24 21:52:08,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:08,508 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2020-09-24 21:52:08,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-24 21:52:08,508 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2020-09-24 21:52:08,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-24 21:52:08,509 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:08,509 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:08,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-24 21:52:08,509 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:08,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:08,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1455178882, now seen corresponding path program 6 times [2020-09-24 21:52:08,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:08,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656051817] [2020-09-24 21:52:08,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:08,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,633 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:08,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:08,918 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-24 21:52:08,918 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:08,918 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 398 [2020-09-24 21:52:08,919 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-24 21:52:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:08,919 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 26 [2020-09-24 21:52:08,920 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:09,063 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:09,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:09,066 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,067 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:09,067 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:09,067 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:09,067 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-24 21:52:09,068 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:09,068 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:09,069 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:09,072 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:09,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656051817] [2020-09-24 21:52:09,073 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:09,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-24 21:52:09,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105762279] [2020-09-24 21:52:09,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-24 21:52:09,074 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:09,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-24 21:52:09,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-09-24 21:52:09,075 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand 15 states. [2020-09-24 21:52:09,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:09,328 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2020-09-24 21:52:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-24 21:52:09,331 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 35 [2020-09-24 21:52:09,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:09,332 INFO L225 Difference]: With dead ends: 47 [2020-09-24 21:52:09,332 INFO L226 Difference]: Without dead ends: 42 [2020-09-24 21:52:09,333 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=243, Invalid=459, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:52:09,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-24 21:52:09,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 40. [2020-09-24 21:52:09,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-24 21:52:09,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2020-09-24 21:52:09,339 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 35 [2020-09-24 21:52:09,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:09,339 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2020-09-24 21:52:09,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-24 21:52:09,339 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2020-09-24 21:52:09,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2020-09-24 21:52:09,341 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:09,341 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:09,341 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-24 21:52:09,341 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:09,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:09,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1411436667, now seen corresponding path program 7 times [2020-09-24 21:52:09,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:09,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [451024907] [2020-09-24 21:52:09,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:09,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:09,360 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:09,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:09,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 48 [2020-09-24 21:52:09,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:09,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 601 [2020-09-24 21:52:09,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-24 21:52:09,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:09,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-24 21:52:09,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:10,109 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:10,112 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,113 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:10,113 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:10,113 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:10,114 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:10,115 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:10,115 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:10,115 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:10,119 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:10,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [451024907] [2020-09-24 21:52:10,119 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:10,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-24 21:52:10,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201153246] [2020-09-24 21:52:10,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-24 21:52:10,121 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:10,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-24 21:52:10,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-09-24 21:52:10,121 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand 17 states. [2020-09-24 21:52:10,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:10,423 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2020-09-24 21:52:10,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-24 21:52:10,423 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 39 [2020-09-24 21:52:10,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:10,425 INFO L225 Difference]: With dead ends: 51 [2020-09-24 21:52:10,425 INFO L226 Difference]: Without dead ends: 46 [2020-09-24 21:52:10,426 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=318, Invalid=612, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:52:10,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-09-24 21:52:10,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 44. [2020-09-24 21:52:10,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-24 21:52:10,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2020-09-24 21:52:10,431 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 39 [2020-09-24 21:52:10,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:10,432 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2020-09-24 21:52:10,432 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-24 21:52:10,432 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2020-09-24 21:52:10,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2020-09-24 21:52:10,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:10,434 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:10,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-24 21:52:10,434 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:10,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:10,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1883315960, now seen corresponding path program 8 times [2020-09-24 21:52:10,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:10,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [472161667] [2020-09-24 21:52:10,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:10,453 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,514 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:10,954 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:10,954 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 52 [2020-09-24 21:52:10,955 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:10,955 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 509 [2020-09-24 21:52:10,955 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-24 21:52:10,955 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:10,956 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 34 [2020-09-24 21:52:10,956 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:11,139 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:11,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:11,141 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,142 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:11,143 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:11,143 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:11,143 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:11,143 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:11,144 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:11,144 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:11,149 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:11,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [472161667] [2020-09-24 21:52:11,150 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:11,151 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19] total 19 [2020-09-24 21:52:11,151 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509257077] [2020-09-24 21:52:11,152 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-24 21:52:11,152 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:11,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-24 21:52:11,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2020-09-24 21:52:11,153 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand 19 states. [2020-09-24 21:52:11,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:11,515 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2020-09-24 21:52:11,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-24 21:52:11,516 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 43 [2020-09-24 21:52:11,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:11,517 INFO L225 Difference]: With dead ends: 55 [2020-09-24 21:52:11,517 INFO L226 Difference]: Without dead ends: 50 [2020-09-24 21:52:11,520 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=403, Invalid=787, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:52:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-24 21:52:11,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 48. [2020-09-24 21:52:11,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-24 21:52:11,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2020-09-24 21:52:11,528 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 43 [2020-09-24 21:52:11,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:11,529 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2020-09-24 21:52:11,529 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-24 21:52:11,529 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2020-09-24 21:52:11,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2020-09-24 21:52:11,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:11,533 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:11,536 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-24 21:52:11,536 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:11,537 INFO L82 PathProgramCache]: Analyzing trace with hash -831789323, now seen corresponding path program 9 times [2020-09-24 21:52:11,537 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:11,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1921106109] [2020-09-24 21:52:11,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:11,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:11,565 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:11,596 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,368 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:12,370 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 56 [2020-09-24 21:52:12,370 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:12,370 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 811 [2020-09-24 21:52:12,371 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 20 [2020-09-24 21:52:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:12,371 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 38 [2020-09-24 21:52:12,372 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:12,600 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:12,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:12,602 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:12,603 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:12,603 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:12,603 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:12,603 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:12,603 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:12,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:12,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:12,604 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:12,604 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:12,621 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:12,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1921106109] [2020-09-24 21:52:12,622 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:12,622 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21] total 21 [2020-09-24 21:52:12,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439591886] [2020-09-24 21:52:12,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-24 21:52:12,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:12,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-24 21:52:12,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=300, Unknown=0, NotChecked=0, Total=420 [2020-09-24 21:52:12,623 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand 21 states. [2020-09-24 21:52:13,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:13,028 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2020-09-24 21:52:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-24 21:52:13,029 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 47 [2020-09-24 21:52:13,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:13,031 INFO L225 Difference]: With dead ends: 59 [2020-09-24 21:52:13,031 INFO L226 Difference]: Without dead ends: 54 [2020-09-24 21:52:13,034 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=498, Invalid=984, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 21:52:13,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-24 21:52:13,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 52. [2020-09-24 21:52:13,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-24 21:52:13,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2020-09-24 21:52:13,044 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 47 [2020-09-24 21:52:13,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:13,045 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2020-09-24 21:52:13,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-24 21:52:13,045 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2020-09-24 21:52:13,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-24 21:52:13,047 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:13,047 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:13,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-24 21:52:13,048 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:13,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:13,048 INFO L82 PathProgramCache]: Analyzing trace with hash 164128882, now seen corresponding path program 10 times [2020-09-24 21:52:13,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:13,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [345079549] [2020-09-24 21:52:13,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:13,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:13,072 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:13,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:13,751 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:13,752 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-24 21:52:13,752 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:13,752 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 687 [2020-09-24 21:52:13,752 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:13,752 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 22 [2020-09-24 21:52:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:13,753 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 42 [2020-09-24 21:52:13,753 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:14,022 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:14,024 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,026 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:14,027 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:14,027 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:14,028 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-24 21:52:14,028 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:14,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:14,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:14,028 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:14,029 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:14,037 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:14,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [345079549] [2020-09-24 21:52:14,038 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:14,038 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23] total 23 [2020-09-24 21:52:14,039 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073880112] [2020-09-24 21:52:14,040 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-24 21:52:14,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:14,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-24 21:52:14,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=363, Unknown=0, NotChecked=0, Total=506 [2020-09-24 21:52:14,043 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand 23 states. [2020-09-24 21:52:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:14,550 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2020-09-24 21:52:14,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-24 21:52:14,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 51 [2020-09-24 21:52:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:14,552 INFO L225 Difference]: With dead ends: 63 [2020-09-24 21:52:14,552 INFO L226 Difference]: Without dead ends: 58 [2020-09-24 21:52:14,554 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=603, Invalid=1203, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 21:52:14,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-24 21:52:14,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2020-09-24 21:52:14,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-24 21:52:14,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2020-09-24 21:52:14,560 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 51 [2020-09-24 21:52:14,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:14,560 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2020-09-24 21:52:14,560 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-24 21:52:14,561 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2020-09-24 21:52:14,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2020-09-24 21:52:14,561 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:14,561 INFO L422 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:14,562 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-24 21:52:14,562 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:14,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:14,562 INFO L82 PathProgramCache]: Analyzing trace with hash 1474159471, now seen corresponding path program 11 times [2020-09-24 21:52:14,563 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:14,563 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474291649] [2020-09-24 21:52:14,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:14,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:14,585 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:14,678 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,303 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:15,303 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 64 [2020-09-24 21:52:15,303 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:15,304 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 726 [2020-09-24 21:52:15,304 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 24 [2020-09-24 21:52:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:15,304 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 46 [2020-09-24 21:52:15,305 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:15,642 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:15,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:15,644 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:15,645 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:15,646 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:15,646 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:15,646 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:15,646 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:15,646 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:15,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:15,647 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:15,647 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:15,651 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:15,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474291649] [2020-09-24 21:52:15,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:15,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25] total 25 [2020-09-24 21:52:15,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303854063] [2020-09-24 21:52:15,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-24 21:52:15,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:15,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-24 21:52:15,654 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=432, Unknown=0, NotChecked=0, Total=600 [2020-09-24 21:52:15,654 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand 25 states. [2020-09-24 21:52:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:16,230 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2020-09-24 21:52:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-24 21:52:16,230 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 55 [2020-09-24 21:52:16,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:16,231 INFO L225 Difference]: With dead ends: 67 [2020-09-24 21:52:16,231 INFO L226 Difference]: Without dead ends: 62 [2020-09-24 21:52:16,233 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=718, Invalid=1444, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:52:16,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-24 21:52:16,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2020-09-24 21:52:16,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-24 21:52:16,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2020-09-24 21:52:16,242 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 55 [2020-09-24 21:52:16,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:16,243 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2020-09-24 21:52:16,243 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-24 21:52:16,243 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2020-09-24 21:52:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2020-09-24 21:52:16,244 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:16,244 INFO L422 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:16,244 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-24 21:52:16,245 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:16,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:16,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1486067692, now seen corresponding path program 12 times [2020-09-24 21:52:16,245 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:16,246 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [978778140] [2020-09-24 21:52:16,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:16,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:16,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:16,376 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:17,023 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:17,024 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 68 [2020-09-24 21:52:17,024 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:17,024 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 764 [2020-09-24 21:52:17,024 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:17,024 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 26 [2020-09-24 21:52:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:17,025 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-24 21:52:17,025 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:17,401 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:17,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:17,403 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:17,404 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:17,404 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:17,404 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:17,405 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:17,405 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:17,405 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:17,406 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:17,406 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:17,413 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:17,414 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [978778140] [2020-09-24 21:52:17,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:17,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27] total 27 [2020-09-24 21:52:17,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797567959] [2020-09-24 21:52:17,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 27 states [2020-09-24 21:52:17,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:17,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2020-09-24 21:52:17,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-09-24 21:52:17,418 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand 27 states. [2020-09-24 21:52:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:17,955 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2020-09-24 21:52:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-24 21:52:17,955 INFO L78 Accepts]: Start accepts. Automaton has 27 states. Word has length 59 [2020-09-24 21:52:17,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:17,957 INFO L225 Difference]: With dead ends: 71 [2020-09-24 21:52:17,957 INFO L226 Difference]: Without dead ends: 66 [2020-09-24 21:52:17,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=843, Invalid=1707, Unknown=0, NotChecked=0, Total=2550 [2020-09-24 21:52:17,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-24 21:52:17,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 64. [2020-09-24 21:52:17,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-24 21:52:17,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2020-09-24 21:52:17,965 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 59 [2020-09-24 21:52:17,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:17,965 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2020-09-24 21:52:17,966 INFO L480 AbstractCegarLoop]: Interpolant automaton has 27 states. [2020-09-24 21:52:17,966 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2020-09-24 21:52:17,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2020-09-24 21:52:17,967 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:17,967 INFO L422 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:17,967 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-24 21:52:17,967 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:17,967 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:17,968 INFO L82 PathProgramCache]: Analyzing trace with hash -433011223, now seen corresponding path program 13 times [2020-09-24 21:52:17,968 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:17,968 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278307085] [2020-09-24 21:52:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:17,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:18,000 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:18,110 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:18,846 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:18,846 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 72 [2020-09-24 21:52:18,846 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:18,847 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 855 [2020-09-24 21:52:18,847 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:18,847 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 28 [2020-09-24 21:52:18,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:18,848 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 54 [2020-09-24 21:52:18,848 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:19,317 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:19,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:19,319 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:19,320 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:19,320 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:19,320 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:19,322 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:19,322 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:19,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:19,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:19,323 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:19,323 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:19,328 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:19,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278307085] [2020-09-24 21:52:19,329 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:19,329 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29] total 29 [2020-09-24 21:52:19,329 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470719367] [2020-09-24 21:52:19,330 INFO L459 AbstractCegarLoop]: Interpolant automaton has 29 states [2020-09-24 21:52:19,330 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:19,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2020-09-24 21:52:19,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=588, Unknown=0, NotChecked=0, Total=812 [2020-09-24 21:52:19,331 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand 29 states. [2020-09-24 21:52:20,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:20,048 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2020-09-24 21:52:20,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-24 21:52:20,049 INFO L78 Accepts]: Start accepts. Automaton has 29 states. Word has length 63 [2020-09-24 21:52:20,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:20,050 INFO L225 Difference]: With dead ends: 75 [2020-09-24 21:52:20,050 INFO L226 Difference]: Without dead ends: 70 [2020-09-24 21:52:20,051 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=978, Invalid=1992, Unknown=0, NotChecked=0, Total=2970 [2020-09-24 21:52:20,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-24 21:52:20,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2020-09-24 21:52:20,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-24 21:52:20,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2020-09-24 21:52:20,064 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 63 [2020-09-24 21:52:20,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:20,065 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2020-09-24 21:52:20,065 INFO L480 AbstractCegarLoop]: Interpolant automaton has 29 states. [2020-09-24 21:52:20,065 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2020-09-24 21:52:20,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2020-09-24 21:52:20,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:20,067 INFO L422 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:20,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-24 21:52:20,068 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:20,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:20,068 INFO L82 PathProgramCache]: Analyzing trace with hash -446911130, now seen corresponding path program 14 times [2020-09-24 21:52:20,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:20,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013766588] [2020-09-24 21:52:20,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:20,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:20,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:20,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,032 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:21,032 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 76 [2020-09-24 21:52:21,033 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:21,033 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 950 [2020-09-24 21:52:21,033 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:21,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 30 [2020-09-24 21:52:21,033 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:21,034 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 58 [2020-09-24 21:52:21,034 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:21,536 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:21,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:21,538 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:21,539 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:21,539 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:21,539 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:21,539 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:21,540 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:21,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:21,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:21,540 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:21,540 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:21,546 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:21,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013766588] [2020-09-24 21:52:21,547 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:21,547 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31] total 31 [2020-09-24 21:52:21,547 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586085014] [2020-09-24 21:52:21,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 31 states [2020-09-24 21:52:21,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:21,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2020-09-24 21:52:21,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=675, Unknown=0, NotChecked=0, Total=930 [2020-09-24 21:52:21,549 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand 31 states. [2020-09-24 21:52:22,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:22,346 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2020-09-24 21:52:22,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-09-24 21:52:22,347 INFO L78 Accepts]: Start accepts. Automaton has 31 states. Word has length 67 [2020-09-24 21:52:22,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:22,347 INFO L225 Difference]: With dead ends: 79 [2020-09-24 21:52:22,347 INFO L226 Difference]: Without dead ends: 74 [2020-09-24 21:52:22,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1123, Invalid=2299, Unknown=0, NotChecked=0, Total=3422 [2020-09-24 21:52:22,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-24 21:52:22,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 72. [2020-09-24 21:52:22,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-24 21:52:22,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2020-09-24 21:52:22,355 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 67 [2020-09-24 21:52:22,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:22,356 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2020-09-24 21:52:22,356 INFO L480 AbstractCegarLoop]: Interpolant automaton has 31 states. [2020-09-24 21:52:22,356 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2020-09-24 21:52:22,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-24 21:52:22,357 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:22,357 INFO L422 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:22,358 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-24 21:52:22,358 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:22,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:22,358 INFO L82 PathProgramCache]: Analyzing trace with hash 354324067, now seen corresponding path program 15 times [2020-09-24 21:52:22,358 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:22,359 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580619857] [2020-09-24 21:52:22,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:22,379 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:22,526 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:23,564 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:23,564 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-24 21:52:23,564 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:23,565 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1195 [2020-09-24 21:52:23,565 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 32 [2020-09-24 21:52:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:23,565 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 62 [2020-09-24 21:52:23,566 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:24,132 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:24,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:24,134 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:24,135 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:24,135 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:24,135 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:24,136 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:24,136 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:24,136 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:24,137 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:24,142 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:24,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580619857] [2020-09-24 21:52:24,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:24,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33] total 33 [2020-09-24 21:52:24,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286619409] [2020-09-24 21:52:24,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 33 states [2020-09-24 21:52:24,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:24,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2020-09-24 21:52:24,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=768, Unknown=0, NotChecked=0, Total=1056 [2020-09-24 21:52:24,145 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand 33 states. [2020-09-24 21:52:25,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:25,141 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2020-09-24 21:52:25,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2020-09-24 21:52:25,142 INFO L78 Accepts]: Start accepts. Automaton has 33 states. Word has length 71 [2020-09-24 21:52:25,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:25,143 INFO L225 Difference]: With dead ends: 83 [2020-09-24 21:52:25,143 INFO L226 Difference]: Without dead ends: 78 [2020-09-24 21:52:25,145 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1278, Invalid=2628, Unknown=0, NotChecked=0, Total=3906 [2020-09-24 21:52:25,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-24 21:52:25,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2020-09-24 21:52:25,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-24 21:52:25,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2020-09-24 21:52:25,151 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 71 [2020-09-24 21:52:25,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:25,152 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2020-09-24 21:52:25,152 INFO L480 AbstractCegarLoop]: Interpolant automaton has 33 states. [2020-09-24 21:52:25,152 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2020-09-24 21:52:25,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2020-09-24 21:52:25,153 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:25,153 INFO L422 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:25,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-24 21:52:25,154 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:25,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:25,154 INFO L82 PathProgramCache]: Analyzing trace with hash -555898656, now seen corresponding path program 16 times [2020-09-24 21:52:25,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:25,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1211210274] [2020-09-24 21:52:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:25,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:25,178 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:25,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:26,522 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:26,522 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 84 [2020-09-24 21:52:26,523 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:26,523 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1356 [2020-09-24 21:52:26,523 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 34 [2020-09-24 21:52:26,523 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:26,524 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-24 21:52:26,524 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:27,127 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:27,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:27,129 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:27,130 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:27,130 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:27,131 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:27,131 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:27,131 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:27,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:27,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:27,131 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:27,131 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:27,136 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:27,136 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1211210274] [2020-09-24 21:52:27,136 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:27,136 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35] total 35 [2020-09-24 21:52:27,137 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317506617] [2020-09-24 21:52:27,137 INFO L459 AbstractCegarLoop]: Interpolant automaton has 35 states [2020-09-24 21:52:27,137 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:27,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2020-09-24 21:52:27,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=867, Unknown=0, NotChecked=0, Total=1190 [2020-09-24 21:52:27,138 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand 35 states. [2020-09-24 21:52:28,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:28,238 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2020-09-24 21:52:28,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2020-09-24 21:52:28,239 INFO L78 Accepts]: Start accepts. Automaton has 35 states. Word has length 75 [2020-09-24 21:52:28,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:28,240 INFO L225 Difference]: With dead ends: 87 [2020-09-24 21:52:28,240 INFO L226 Difference]: Without dead ends: 82 [2020-09-24 21:52:28,242 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 736 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1443, Invalid=2979, Unknown=0, NotChecked=0, Total=4422 [2020-09-24 21:52:28,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-24 21:52:28,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 80. [2020-09-24 21:52:28,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-24 21:52:28,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2020-09-24 21:52:28,247 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 75 [2020-09-24 21:52:28,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:28,247 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2020-09-24 21:52:28,247 INFO L480 AbstractCegarLoop]: Interpolant automaton has 35 states. [2020-09-24 21:52:28,248 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2020-09-24 21:52:28,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2020-09-24 21:52:28,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:28,249 INFO L422 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:28,249 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-24 21:52:28,249 INFO L427 AbstractCegarLoop]: === Iteration 18 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:28,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:28,250 INFO L82 PathProgramCache]: Analyzing trace with hash 643906781, now seen corresponding path program 17 times [2020-09-24 21:52:28,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:28,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1726465362] [2020-09-24 21:52:28,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:28,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:28,273 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:28,384 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:29,683 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:29,683 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 88 [2020-09-24 21:52:29,683 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:29,683 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1421 [2020-09-24 21:52:29,684 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:29,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 36 [2020-09-24 21:52:29,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:29,684 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 70 [2020-09-24 21:52:29,685 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:30,404 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:30,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:30,406 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:30,407 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:30,407 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:30,407 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:30,407 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:30,408 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:30,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:30,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:30,408 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:30,408 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:30,415 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:30,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1726465362] [2020-09-24 21:52:30,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:30,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37] total 37 [2020-09-24 21:52:30,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143765669] [2020-09-24 21:52:30,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 37 states [2020-09-24 21:52:30,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:30,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2020-09-24 21:52:30,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=972, Unknown=0, NotChecked=0, Total=1332 [2020-09-24 21:52:30,418 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand 37 states. [2020-09-24 21:52:31,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:31,582 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2020-09-24 21:52:31,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2020-09-24 21:52:31,583 INFO L78 Accepts]: Start accepts. Automaton has 37 states. Word has length 79 [2020-09-24 21:52:31,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:31,584 INFO L225 Difference]: With dead ends: 91 [2020-09-24 21:52:31,584 INFO L226 Difference]: Without dead ends: 86 [2020-09-24 21:52:31,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 833 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1618, Invalid=3352, Unknown=0, NotChecked=0, Total=4970 [2020-09-24 21:52:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-24 21:52:31,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 84. [2020-09-24 21:52:31,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-24 21:52:31,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2020-09-24 21:52:31,591 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 79 [2020-09-24 21:52:31,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:31,591 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2020-09-24 21:52:31,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 37 states. [2020-09-24 21:52:31,592 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2020-09-24 21:52:31,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2020-09-24 21:52:31,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:31,593 INFO L422 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:31,593 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2020-09-24 21:52:31,593 INFO L427 AbstractCegarLoop]: === Iteration 19 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:31,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:31,594 INFO L82 PathProgramCache]: Analyzing trace with hash 433097306, now seen corresponding path program 18 times [2020-09-24 21:52:31,596 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:31,596 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508195356] [2020-09-24 21:52:31,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:31,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:31,618 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:31,800 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:33,019 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:33,020 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 92 [2020-09-24 21:52:33,020 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:33,020 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1412 [2020-09-24 21:52:33,020 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:33,020 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 38 [2020-09-24 21:52:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:33,021 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 74 [2020-09-24 21:52:33,021 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:33,890 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:33,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:33,892 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:33,893 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:33,893 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:33,893 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:33,893 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:33,893 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:33,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:33,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:33,894 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:33,894 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:33,902 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:33,902 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508195356] [2020-09-24 21:52:33,902 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:33,903 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39] total 39 [2020-09-24 21:52:33,903 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510638265] [2020-09-24 21:52:33,903 INFO L459 AbstractCegarLoop]: Interpolant automaton has 39 states [2020-09-24 21:52:33,904 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:33,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2020-09-24 21:52:33,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=399, Invalid=1083, Unknown=0, NotChecked=0, Total=1482 [2020-09-24 21:52:33,905 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand 39 states. [2020-09-24 21:52:35,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:35,180 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2020-09-24 21:52:35,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2020-09-24 21:52:35,180 INFO L78 Accepts]: Start accepts. Automaton has 39 states. Word has length 83 [2020-09-24 21:52:35,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:35,181 INFO L225 Difference]: With dead ends: 95 [2020-09-24 21:52:35,181 INFO L226 Difference]: Without dead ends: 90 [2020-09-24 21:52:35,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1803, Invalid=3747, Unknown=0, NotChecked=0, Total=5550 [2020-09-24 21:52:35,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-24 21:52:35,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 88. [2020-09-24 21:52:35,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-24 21:52:35,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2020-09-24 21:52:35,188 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 83 [2020-09-24 21:52:35,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:35,188 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2020-09-24 21:52:35,188 INFO L480 AbstractCegarLoop]: Interpolant automaton has 39 states. [2020-09-24 21:52:35,189 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2020-09-24 21:52:35,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2020-09-24 21:52:35,189 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:35,190 INFO L422 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:35,190 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2020-09-24 21:52:35,190 INFO L427 AbstractCegarLoop]: === Iteration 20 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:35,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:35,190 INFO L82 PathProgramCache]: Analyzing trace with hash 28496215, now seen corresponding path program 19 times [2020-09-24 21:52:35,191 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:35,191 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [798104250] [2020-09-24 21:52:35,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:35,214 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:35,312 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:36,851 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:36,851 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 96 [2020-09-24 21:52:36,852 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:36,852 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1648 [2020-09-24 21:52:36,852 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 40 [2020-09-24 21:52:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:36,852 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 78 [2020-09-24 21:52:36,853 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:37,723 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:37,725 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:37,726 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:37,727 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:37,727 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:37,728 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:37,728 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:37,728 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:37,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:37,729 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:37,729 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-24 21:52:37,745 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:37,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [798104250] [2020-09-24 21:52:37,746 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:37,746 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41] total 41 [2020-09-24 21:52:37,746 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257797145] [2020-09-24 21:52:37,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 41 states [2020-09-24 21:52:37,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:37,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2020-09-24 21:52:37,750 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=440, Invalid=1200, Unknown=0, NotChecked=0, Total=1640 [2020-09-24 21:52:37,750 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand 41 states. [2020-09-24 21:52:39,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:39,107 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2020-09-24 21:52:39,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2020-09-24 21:52:39,108 INFO L78 Accepts]: Start accepts. Automaton has 41 states. Word has length 87 [2020-09-24 21:52:39,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:39,109 INFO L225 Difference]: With dead ends: 99 [2020-09-24 21:52:39,109 INFO L226 Difference]: Without dead ends: 94 [2020-09-24 21:52:39,112 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1045 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1998, Invalid=4164, Unknown=0, NotChecked=0, Total=6162 [2020-09-24 21:52:39,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-24 21:52:39,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 92. [2020-09-24 21:52:39,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-24 21:52:39,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2020-09-24 21:52:39,119 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 87 [2020-09-24 21:52:39,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:39,119 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2020-09-24 21:52:39,119 INFO L480 AbstractCegarLoop]: Interpolant automaton has 41 states. [2020-09-24 21:52:39,120 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2020-09-24 21:52:39,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2020-09-24 21:52:39,120 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:39,121 INFO L422 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:39,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2020-09-24 21:52:39,121 INFO L427 AbstractCegarLoop]: === Iteration 21 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:39,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:39,121 INFO L82 PathProgramCache]: Analyzing trace with hash 284119508, now seen corresponding path program 20 times [2020-09-24 21:52:39,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:39,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528568840] [2020-09-24 21:52:39,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:39,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:39,147 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:39,374 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:40,819 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:40,820 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 100 [2020-09-24 21:52:40,820 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:40,820 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1685 [2020-09-24 21:52:40,820 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 42 [2020-09-24 21:52:40,820 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:40,821 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 82 [2020-09-24 21:52:40,821 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:41,731 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:41,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:41,733 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:41,734 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:41,734 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:41,734 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:41,735 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:41,735 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:41,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:41,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:41,735 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:41,736 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:41,742 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:41,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528568840] [2020-09-24 21:52:41,743 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:41,743 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43] total 43 [2020-09-24 21:52:41,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726774416] [2020-09-24 21:52:41,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 43 states [2020-09-24 21:52:41,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:41,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2020-09-24 21:52:41,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=1323, Unknown=0, NotChecked=0, Total=1806 [2020-09-24 21:52:41,745 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand 43 states. [2020-09-24 21:52:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:43,308 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2020-09-24 21:52:43,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2020-09-24 21:52:43,315 INFO L78 Accepts]: Start accepts. Automaton has 43 states. Word has length 91 [2020-09-24 21:52:43,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:43,316 INFO L225 Difference]: With dead ends: 103 [2020-09-24 21:52:43,316 INFO L226 Difference]: Without dead ends: 98 [2020-09-24 21:52:43,319 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=2203, Invalid=4603, Unknown=0, NotChecked=0, Total=6806 [2020-09-24 21:52:43,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-24 21:52:43,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 96. [2020-09-24 21:52:43,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-24 21:52:43,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2020-09-24 21:52:43,322 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 91 [2020-09-24 21:52:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:43,323 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2020-09-24 21:52:43,323 INFO L480 AbstractCegarLoop]: Interpolant automaton has 43 states. [2020-09-24 21:52:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2020-09-24 21:52:43,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2020-09-24 21:52:43,324 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:43,324 INFO L422 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:43,325 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2020-09-24 21:52:43,325 INFO L427 AbstractCegarLoop]: === Iteration 22 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:43,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:43,325 INFO L82 PathProgramCache]: Analyzing trace with hash 885869521, now seen corresponding path program 21 times [2020-09-24 21:52:43,325 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:43,326 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1296482626] [2020-09-24 21:52:43,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:43,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:43,351 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:43,582 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:45,056 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:45,057 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 104 [2020-09-24 21:52:45,057 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:45,057 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1718 [2020-09-24 21:52:45,057 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 44 [2020-09-24 21:52:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:45,057 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 86 [2020-09-24 21:52:45,058 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:46,136 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:46,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:46,138 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:46,139 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:46,139 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:46,139 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:46,139 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:46,139 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:46,139 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:46,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:46,140 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:46,140 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:46,147 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:46,147 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1296482626] [2020-09-24 21:52:46,148 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:46,148 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45] total 45 [2020-09-24 21:52:46,148 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621657187] [2020-09-24 21:52:46,148 INFO L459 AbstractCegarLoop]: Interpolant automaton has 45 states [2020-09-24 21:52:46,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:46,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2020-09-24 21:52:46,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=1452, Unknown=0, NotChecked=0, Total=1980 [2020-09-24 21:52:46,150 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand 45 states. [2020-09-24 21:52:47,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:47,831 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2020-09-24 21:52:47,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2020-09-24 21:52:47,834 INFO L78 Accepts]: Start accepts. Automaton has 45 states. Word has length 95 [2020-09-24 21:52:47,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:47,835 INFO L225 Difference]: With dead ends: 107 [2020-09-24 21:52:47,836 INFO L226 Difference]: Without dead ends: 102 [2020-09-24 21:52:47,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1281 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2418, Invalid=5064, Unknown=0, NotChecked=0, Total=7482 [2020-09-24 21:52:47,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-24 21:52:47,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 100. [2020-09-24 21:52:47,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-09-24 21:52:47,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2020-09-24 21:52:47,841 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 95 [2020-09-24 21:52:47,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:47,841 INFO L479 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2020-09-24 21:52:47,841 INFO L480 AbstractCegarLoop]: Interpolant automaton has 45 states. [2020-09-24 21:52:47,841 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2020-09-24 21:52:47,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2020-09-24 21:52:47,842 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:47,842 INFO L422 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:47,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2020-09-24 21:52:47,843 INFO L427 AbstractCegarLoop]: === Iteration 23 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:47,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:47,843 INFO L82 PathProgramCache]: Analyzing trace with hash -453771442, now seen corresponding path program 22 times [2020-09-24 21:52:47,843 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:47,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112428686] [2020-09-24 21:52:47,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:47,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:47,870 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:47,978 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:49,803 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:49,803 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 108 [2020-09-24 21:52:49,803 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:49,803 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1946 [2020-09-24 21:52:49,803 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:49,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 46 [2020-09-24 21:52:49,803 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:49,804 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 90 [2020-09-24 21:52:49,804 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:50,988 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-24 21:52:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:50,990 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:50,991 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:50,991 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-24 21:52:50,992 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-24 21:52:50,992 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-24 21:52:50,992 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:50,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-24 21:52:50,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-24 21:52:50,992 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-24 21:52:50,993 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-24 21:52:51,002 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-24 21:52:51,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112428686] [2020-09-24 21:52:51,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-24 21:52:51,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47] total 47 [2020-09-24 21:52:51,003 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188837342] [2020-09-24 21:52:51,004 INFO L459 AbstractCegarLoop]: Interpolant automaton has 47 states [2020-09-24 21:52:51,004 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-24 21:52:51,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2020-09-24 21:52:51,005 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=575, Invalid=1587, Unknown=0, NotChecked=0, Total=2162 [2020-09-24 21:52:51,005 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand 47 states. [2020-09-24 21:52:52,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-24 21:52:52,823 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2020-09-24 21:52:52,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2020-09-24 21:52:52,824 INFO L78 Accepts]: Start accepts. Automaton has 47 states. Word has length 99 [2020-09-24 21:52:52,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-24 21:52:52,825 INFO L225 Difference]: With dead ends: 111 [2020-09-24 21:52:52,825 INFO L226 Difference]: Without dead ends: 106 [2020-09-24 21:52:52,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=2643, Invalid=5547, Unknown=0, NotChecked=0, Total=8190 [2020-09-24 21:52:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-24 21:52:52,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 104. [2020-09-24 21:52:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-09-24 21:52:52,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2020-09-24 21:52:52,830 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 99 [2020-09-24 21:52:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-24 21:52:52,831 INFO L479 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2020-09-24 21:52:52,831 INFO L480 AbstractCegarLoop]: Interpolant automaton has 47 states. [2020-09-24 21:52:52,831 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2020-09-24 21:52:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2020-09-24 21:52:52,832 INFO L414 BasicCegarLoop]: Found error trace [2020-09-24 21:52:52,832 INFO L422 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-24 21:52:52,832 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2020-09-24 21:52:52,832 INFO L427 AbstractCegarLoop]: === Iteration 24 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-24 21:52:52,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-24 21:52:52,833 INFO L82 PathProgramCache]: Analyzing trace with hash -211112885, now seen corresponding path program 23 times [2020-09-24 21:52:52,833 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-24 21:52:52,833 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [214697109] [2020-09-24 21:52:52,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-24 21:52:52,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-24 21:52:52,861 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:52,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-24 21:52:54,940 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-24 21:52:54,940 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 112 [2020-09-24 21:52:54,940 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-24 21:52:54,940 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2093 [2020-09-24 21:52:54,940 FATAL L256 erpolLogProxyWrapper]: Heuristic: LOWLEXORDER [2020-09-24 21:52:54,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 48 [2020-09-24 21:52:54,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-24 21:52:54,941 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 94 [2020-09-24 21:52:54,941 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0