/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=DEEPEST --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-lit/afnp2014.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c90d42b [2020-09-25 01:11:00,601 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-25 01:11:00,605 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-25 01:11:00,632 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-25 01:11:00,632 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-25 01:11:00,633 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-25 01:11:00,635 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-25 01:11:00,637 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-25 01:11:00,639 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-25 01:11:00,640 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-25 01:11:00,641 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-25 01:11:00,642 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-25 01:11:00,643 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-25 01:11:00,644 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-25 01:11:00,645 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-25 01:11:00,647 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-25 01:11:00,648 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-25 01:11:00,649 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-25 01:11:00,651 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-25 01:11:00,653 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-25 01:11:00,654 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-25 01:11:00,655 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-25 01:11:00,657 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-25 01:11:00,658 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-25 01:11:00,660 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-25 01:11:00,661 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-25 01:11:00,661 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-25 01:11:00,662 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-25 01:11:00,662 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-25 01:11:00,664 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-25 01:11:00,664 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-25 01:11:00,665 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-25 01:11:00,666 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-25 01:11:00,667 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-25 01:11:00,668 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-25 01:11:00,668 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-25 01:11:00,669 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-25 01:11:00,669 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-25 01:11:00,669 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-25 01:11:00,670 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-25 01:11:00,671 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-25 01:11:00,672 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 [2020-09-25 01:11:00,699 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-25 01:11:00,699 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-25 01:11:00,701 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-25 01:11:00,701 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-25 01:11:00,701 INFO L138 SettingsManager]: * Use SBE=true [2020-09-25 01:11:00,701 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-25 01:11:00,702 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-25 01:11:00,702 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-25 01:11:00,702 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-25 01:11:00,702 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-25 01:11:00,702 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-25 01:11:00,703 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-25 01:11:00,703 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-25 01:11:00,703 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-25 01:11:00,703 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-25 01:11:00,703 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-25 01:11:00,704 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-25 01:11:00,704 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-25 01:11:00,704 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-25 01:11:00,704 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-25 01:11:00,705 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-25 01:11:00,705 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-25 01:11:00,705 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-25 01:11:00,705 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-25 01:11:00,705 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-25 01:11:00,706 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-25 01:11:00,706 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-25 01:11:00,706 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-25 01:11:00,706 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-25 01:11:00,707 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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;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=DEEPEST;log-additional-information=true; [2020-09-25 01:11:01,174 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-25 01:11:01,199 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-25 01:11:01,203 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-25 01:11:01,206 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-25 01:11:01,207 INFO L275 PluginConnector]: CDTParser initialized [2020-09-25 01:11:01,209 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 01:11:01,296 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ba71e8b3/0859cd8710bb4b898a2b25a1aef22f4f/FLAGffd4ee396 [2020-09-25 01:11:01,828 INFO L306 CDTParser]: Found 1 translation units. [2020-09-25 01:11:01,829 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/loop-lit/afnp2014.i [2020-09-25 01:11:01,840 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ba71e8b3/0859cd8710bb4b898a2b25a1aef22f4f/FLAGffd4ee396 [2020-09-25 01:11:02,186 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/2ba71e8b3/0859cd8710bb4b898a2b25a1aef22f4f [2020-09-25 01:11:02,199 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-25 01:11:02,204 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2020-09-25 01:11:02,206 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-25 01:11:02,206 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-25 01:11:02,210 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-25 01:11:02,211 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,215 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21af3704 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02, skipping insertion in model container [2020-09-25 01:11:02,215 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,224 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-25 01:11:02,250 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-25 01:11:02,464 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:11:02,470 INFO L203 MainTranslator]: Completed pre-run [2020-09-25 01:11:02,490 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-25 01:11:02,508 INFO L208 MainTranslator]: Completed translation [2020-09-25 01:11:02,508 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02 WrapperNode [2020-09-25 01:11:02,509 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-25 01:11:02,509 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-25 01:11:02,510 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-25 01:11:02,510 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-25 01:11:02,527 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,527 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,533 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,534 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,537 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,542 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,544 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (1/1) ... [2020-09-25 01:11:02,623 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-25 01:11:02,623 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-25 01:11:02,624 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-25 01:11:02,626 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-25 01:11:02,628 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (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 [2020-09-25 01:11:02,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2020-09-25 01:11:02,709 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-25 01:11:02,710 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2020-09-25 01:11:02,710 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2020-09-25 01:11:02,710 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2020-09-25 01:11:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2020-09-25 01:11:02,711 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2020-09-25 01:11:02,712 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2020-09-25 01:11:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2020-09-25 01:11:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2020-09-25 01:11:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure main [2020-09-25 01:11:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2020-09-25 01:11:02,713 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-25 01:11:02,942 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-25 01:11:02,942 INFO L295 CfgBuilder]: Removed 1 assume(true) statements. [2020-09-25 01:11:02,948 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:11:02 BoogieIcfgContainer [2020-09-25 01:11:02,948 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-25 01:11:02,950 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-25 01:11:02,950 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-25 01:11:02,954 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-25 01:11:02,955 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 25.09 01:11:02" (1/3) ... [2020-09-25 01:11:02,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e79c826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:11:02, skipping insertion in model container [2020-09-25 01:11:02,956 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 25.09 01:11:02" (2/3) ... [2020-09-25 01:11:02,956 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6e79c826 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 25.09 01:11:02, skipping insertion in model container [2020-09-25 01:11:02,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 25.09 01:11:02" (3/3) ... [2020-09-25 01:11:02,959 INFO L109 eAbstractionObserver]: Analyzing ICFG afnp2014.i [2020-09-25 01:11:02,975 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-09-25 01:11:02,988 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-25 01:11:03,019 INFO L251 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2020-09-25 01:11:03,067 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-25 01:11:03,067 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-25 01:11:03,067 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-09-25 01:11:03,067 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-25 01:11:03,067 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-25 01:11:03,068 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-25 01:11:03,068 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-25 01:11:03,068 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-25 01:11:03,095 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states. [2020-09-25 01:11:03,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-25 01:11:03,103 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:03,105 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:03,105 INFO L427 AbstractCegarLoop]: === Iteration 1 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:03,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:03,112 INFO L82 PathProgramCache]: Analyzing trace with hash -270656080, now seen corresponding path program 1 times [2020-09-25 01:11:03,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:03,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144058781] [2020-09-25 01:11:03,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:03,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:03,244 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:03,293 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:03,329 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:03,330 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 20 [2020-09-25 01:11:03,330 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 2 [2020-09-25 01:11:03,330 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 96 [2020-09-25 01:11:03,333 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:03,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:03,333 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 13 [2020-09-25 01:11:03,334 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:03,334 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 3 [2020-09-25 01:11:03,361 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:03,364 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:03,366 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:03,367 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:03,367 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:03,367 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:11:03,367 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:03,368 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:03,368 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:03,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:03,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144058781] [2020-09-25 01:11:03,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:11:03,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-25 01:11:03,379 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712042740] [2020-09-25 01:11:03,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 2 states [2020-09-25 01:11:03,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:03,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2020-09-25 01:11:03,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:11:03,407 INFO L87 Difference]: Start difference. First operand 29 states. Second operand 2 states. [2020-09-25 01:11:03,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:03,436 INFO L93 Difference]: Finished difference Result 41 states and 45 transitions. [2020-09-25 01:11:03,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2020-09-25 01:11:03,438 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 11 [2020-09-25 01:11:03,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:03,449 INFO L225 Difference]: With dead ends: 41 [2020-09-25 01:11:03,450 INFO L226 Difference]: Without dead ends: 22 [2020-09-25 01:11:03,454 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2020-09-25 01:11:03,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2020-09-25 01:11:03,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2020-09-25 01:11:03,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2020-09-25 01:11:03,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2020-09-25 01:11:03,500 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 11 [2020-09-25 01:11:03,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:03,500 INFO L479 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2020-09-25 01:11:03,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 2 states. [2020-09-25 01:11:03,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2020-09-25 01:11:03,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-25 01:11:03,501 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:03,501 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:03,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-25 01:11:03,502 INFO L427 AbstractCegarLoop]: === Iteration 2 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:03,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:03,503 INFO L82 PathProgramCache]: Analyzing trace with hash 1179723712, now seen corresponding path program 1 times [2020-09-25 01:11:03,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:03,503 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1761127446] [2020-09-25 01:11:03,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:03,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:03,517 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:03,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:03,583 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:03,653 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:03,654 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 24 [2020-09-25 01:11:03,654 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:11:03,654 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 141 [2020-09-25 01:11:03,655 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:03,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 3 [2020-09-25 01:11:03,655 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:03,656 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 4 [2020-09-25 01:11:03,656 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:03,711 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:03,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:03,714 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:03,716 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:03,716 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:03,717 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:03,717 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3 [2020-09-25 01:11:03,717 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:03,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:03,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:03,718 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:03,718 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:03,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:03,722 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1761127446] [2020-09-25 01:11:03,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:11:03,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-25 01:11:03,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292777507] [2020-09-25 01:11:03,725 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-25 01:11:03,725 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:03,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-25 01:11:03,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-25 01:11:03,727 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand 4 states. [2020-09-25 01:11:03,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:03,793 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2020-09-25 01:11:03,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-25 01:11:03,794 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 15 [2020-09-25 01:11:03,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:03,797 INFO L225 Difference]: With dead ends: 50 [2020-09-25 01:11:03,797 INFO L226 Difference]: Without dead ends: 34 [2020-09-25 01:11:03,799 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:11:03,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2020-09-25 01:11:03,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 24. [2020-09-25 01:11:03,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2020-09-25 01:11:03,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2020-09-25 01:11:03,807 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 15 [2020-09-25 01:11:03,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:03,807 INFO L479 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2020-09-25 01:11:03,807 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-25 01:11:03,807 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2020-09-25 01:11:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-25 01:11:03,808 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:03,809 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:03,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-25 01:11:03,809 INFO L427 AbstractCegarLoop]: === Iteration 3 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1535220285, now seen corresponding path program 1 times [2020-09-25 01:11:03,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:03,810 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [88351995] [2020-09-25 01:11:03,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:03,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:03,829 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:03,941 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:03,944 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 26 [2020-09-25 01:11:03,944 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:03,944 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 119 [2020-09-25 01:11:03,945 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 01:11:03,945 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:03,946 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 14 [2020-09-25 01:11:03,946 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:04,045 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:04,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:04,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,048 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:04,049 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:04,049 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:04,049 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:11:04,049 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:04,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:04,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:04,050 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:04,050 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:04,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:04,054 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [88351995] [2020-09-25 01:11:04,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-25 01:11:04,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2020-09-25 01:11:04,055 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689842704] [2020-09-25 01:11:04,056 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:11:04,056 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:04,056 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:11:04,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:11:04,057 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand 6 states. [2020-09-25 01:11:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:04,119 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2020-09-25 01:11:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 01:11:04,119 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 17 [2020-09-25 01:11:04,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:04,121 INFO L225 Difference]: With dead ends: 38 [2020-09-25 01:11:04,121 INFO L226 Difference]: Without dead ends: 31 [2020-09-25 01:11:04,122 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:11:04,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2020-09-25 01:11:04,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 27. [2020-09-25 01:11:04,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2020-09-25 01:11:04,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2020-09-25 01:11:04,132 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 17 [2020-09-25 01:11:04,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:04,132 INFO L479 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2020-09-25 01:11:04,132 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:11:04,133 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2020-09-25 01:11:04,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-25 01:11:04,134 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:04,134 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:04,135 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-25 01:11:04,135 INFO L427 AbstractCegarLoop]: === Iteration 4 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:04,135 INFO L82 PathProgramCache]: Analyzing trace with hash 463086038, now seen corresponding path program 1 times [2020-09-25 01:11:04,136 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:04,136 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854667386] [2020-09-25 01:11:04,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:04,166 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,234 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,274 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,383 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:04,383 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 33 [2020-09-25 01:11:04,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 3 [2020-09-25 01:11:04,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 227 [2020-09-25 01:11:04,384 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:04,384 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 4 [2020-09-25 01:11:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:04,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 13 [2020-09-25 01:11:04,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:04,423 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:04,436 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,441 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:04,441 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:04,441 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:04,441 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 6 [2020-09-25 01:11:04,442 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:04,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:04,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:04,442 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:04,443 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:04,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:04,448 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854667386] [2020-09-25 01:11:04,452 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:04,452 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5] total 5 [2020-09-25 01:11:04,452 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629486407] [2020-09-25 01:11:04,453 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-25 01:11:04,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:04,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-25 01:11:04,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-09-25 01:11:04,454 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand 5 states. [2020-09-25 01:11:04,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:04,543 INFO L93 Difference]: Finished difference Result 59 states and 63 transitions. [2020-09-25 01:11:04,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-25 01:11:04,544 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 24 [2020-09-25 01:11:04,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:04,545 INFO L225 Difference]: With dead ends: 59 [2020-09-25 01:11:04,545 INFO L226 Difference]: Without dead ends: 43 [2020-09-25 01:11:04,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:11:04,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-25 01:11:04,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 33. [2020-09-25 01:11:04,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2020-09-25 01:11:04,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2020-09-25 01:11:04,558 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 24 [2020-09-25 01:11:04,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:04,561 INFO L479 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2020-09-25 01:11:04,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-25 01:11:04,562 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2020-09-25 01:11:04,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-25 01:11:04,563 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:04,563 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:04,563 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-25 01:11:04,563 INFO L427 AbstractCegarLoop]: === Iteration 5 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:04,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:04,565 INFO L82 PathProgramCache]: Analyzing trace with hash 1265709657, now seen corresponding path program 1 times [2020-09-25 01:11:04,565 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:04,565 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556693950] [2020-09-25 01:11:04,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:04,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:04,594 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,689 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:04,689 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 35 [2020-09-25 01:11:04,689 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:04,689 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 105 [2020-09-25 01:11:04,690 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:11:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:04,690 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 23 [2020-09-25 01:11:04,690 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:04,738 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:04,740 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,741 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:04,741 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:04,742 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:04,742 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:11:04,742 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:04,742 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:04,743 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:04,743 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:04,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:04,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556693950] [2020-09-25 01:11:04,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:04,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 01:11:04,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649870449] [2020-09-25 01:11:04,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 01:11:04,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:04,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 01:11:04,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:11:04,749 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand 7 states. [2020-09-25 01:11:04,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:04,808 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2020-09-25 01:11:04,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-25 01:11:04,809 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 26 [2020-09-25 01:11:04,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:04,810 INFO L225 Difference]: With dead ends: 46 [2020-09-25 01:11:04,810 INFO L226 Difference]: Without dead ends: 39 [2020-09-25 01:11:04,811 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:11:04,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2020-09-25 01:11:04,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2020-09-25 01:11:04,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2020-09-25 01:11:04,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2020-09-25 01:11:04,817 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 26 [2020-09-25 01:11:04,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:04,817 INFO L479 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2020-09-25 01:11:04,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 01:11:04,817 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2020-09-25 01:11:04,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2020-09-25 01:11:04,818 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:04,819 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:04,819 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-25 01:11:04,819 INFO L427 AbstractCegarLoop]: === Iteration 6 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:04,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:04,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1847206016, now seen corresponding path program 2 times [2020-09-25 01:11:04,820 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:04,820 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1306708694] [2020-09-25 01:11:04,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:04,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:04,835 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,877 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:04,901 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:05,213 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:05,277 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:05,347 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:05,347 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 42 [2020-09-25 01:11:05,347 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 5 [2020-09-25 01:11:05,347 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 517 [2020-09-25 01:11:05,348 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 5 [2020-09-25 01:11:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:05,348 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 22 [2020-09-25 01:11:05,348 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:05,381 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:05,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:05,383 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:05,384 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:05,384 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:05,384 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:05,384 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:05,385 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:05,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:05,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:05,385 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:05,385 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:05,388 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:05,389 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1306708694] [2020-09-25 01:11:05,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:05,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6] total 6 [2020-09-25 01:11:05,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051584863] [2020-09-25 01:11:05,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-25 01:11:05,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:05,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-25 01:11:05,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-09-25 01:11:05,391 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand 6 states. [2020-09-25 01:11:05,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:05,476 INFO L93 Difference]: Finished difference Result 68 states and 72 transitions. [2020-09-25 01:11:05,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-25 01:11:05,477 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 33 [2020-09-25 01:11:05,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:05,478 INFO L225 Difference]: With dead ends: 68 [2020-09-25 01:11:05,478 INFO L226 Difference]: Without dead ends: 52 [2020-09-25 01:11:05,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:11:05,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-25 01:11:05,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-09-25 01:11:05,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-25 01:11:05,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2020-09-25 01:11:05,486 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 33 [2020-09-25 01:11:05,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:05,486 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2020-09-25 01:11:05,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-25 01:11:05,487 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2020-09-25 01:11:05,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2020-09-25 01:11:05,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:05,488 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:05,488 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-09-25 01:11:05,488 INFO L427 AbstractCegarLoop]: === Iteration 7 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:05,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:05,489 INFO L82 PathProgramCache]: Analyzing trace with hash -34853245, now seen corresponding path program 2 times [2020-09-25 01:11:05,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:05,490 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1706741047] [2020-09-25 01:11:05,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:05,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:05,506 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:05,621 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:05,622 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 44 [2020-09-25 01:11:05,622 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:05,623 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 121 [2020-09-25 01:11:05,623 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:05,623 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:11:05,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:05,624 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 32 [2020-09-25 01:11:05,624 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:05,715 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:05,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:05,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:05,721 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:05,721 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:05,721 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:05,722 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:11:05,722 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:05,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:05,722 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:05,723 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:05,723 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:05,727 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:05,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1706741047] [2020-09-25 01:11:05,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:05,728 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 01:11:05,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826588084] [2020-09-25 01:11:05,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 01:11:05,731 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:05,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 01:11:05,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:11:05,731 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand 8 states. [2020-09-25 01:11:05,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:05,851 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2020-09-25 01:11:05,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-25 01:11:05,852 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 35 [2020-09-25 01:11:05,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:05,853 INFO L225 Difference]: With dead ends: 55 [2020-09-25 01:11:05,853 INFO L226 Difference]: Without dead ends: 48 [2020-09-25 01:11:05,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:11:05,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-25 01:11:05,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 45. [2020-09-25 01:11:05,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-25 01:11:05,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2020-09-25 01:11:05,859 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 35 [2020-09-25 01:11:05,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:05,860 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2020-09-25 01:11:05,860 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 01:11:05,860 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2020-09-25 01:11:05,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2020-09-25 01:11:05,861 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:05,861 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:05,862 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-09-25 01:11:05,862 INFO L427 AbstractCegarLoop]: === Iteration 8 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:05,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:05,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1854078698, now seen corresponding path program 3 times [2020-09-25 01:11:05,862 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:05,863 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1646272265] [2020-09-25 01:11:05,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:05,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:05,881 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:05,922 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:05,971 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:06,267 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:06,339 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:06,490 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:06,541 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:06,584 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:06,584 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 51 [2020-09-25 01:11:06,584 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 7 [2020-09-25 01:11:06,585 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 711 [2020-09-25 01:11:06,585 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:06,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 6 [2020-09-25 01:11:06,585 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:06,586 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 30 [2020-09-25 01:11:06,586 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:06,629 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:06,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:06,631 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:06,631 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:06,632 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:06,632 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:06,632 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:06,632 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:06,633 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:06,633 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:06,637 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 3 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:06,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1646272265] [2020-09-25 01:11:06,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:06,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7] total 7 [2020-09-25 01:11:06,638 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712847319] [2020-09-25 01:11:06,638 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-25 01:11:06,638 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:06,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-25 01:11:06,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-09-25 01:11:06,639 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand 7 states. [2020-09-25 01:11:06,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:06,730 INFO L93 Difference]: Finished difference Result 77 states and 81 transitions. [2020-09-25 01:11:06,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 01:11:06,730 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 42 [2020-09-25 01:11:06,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:06,731 INFO L225 Difference]: With dead ends: 77 [2020-09-25 01:11:06,732 INFO L226 Difference]: Without dead ends: 61 [2020-09-25 01:11:06,732 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:11:06,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-25 01:11:06,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 51. [2020-09-25 01:11:06,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-25 01:11:06,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2020-09-25 01:11:06,738 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 42 [2020-09-25 01:11:06,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:06,739 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2020-09-25 01:11:06,739 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-25 01:11:06,739 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2020-09-25 01:11:06,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2020-09-25 01:11:06,740 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:06,740 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:06,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-09-25 01:11:06,741 INFO L427 AbstractCegarLoop]: === Iteration 9 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:06,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:06,741 INFO L82 PathProgramCache]: Analyzing trace with hash -736542311, now seen corresponding path program 3 times [2020-09-25 01:11:06,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:06,742 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039315557] [2020-09-25 01:11:06,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:06,763 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:06,918 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:06,919 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 53 [2020-09-25 01:11:06,919 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:06,935 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 164 [2020-09-25 01:11:06,935 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:11:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:06,936 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 41 [2020-09-25 01:11:06,936 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:07,060 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:07,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:07,062 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:07,063 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:07,063 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:07,063 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:07,063 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:07,064 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:07,064 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:07,064 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:07,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039315557] [2020-09-25 01:11:07,070 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:07,070 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 01:11:07,070 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053230414] [2020-09-25 01:11:07,071 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 01:11:07,071 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:07,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 01:11:07,072 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:11:07,072 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand 11 states. [2020-09-25 01:11:07,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:07,221 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2020-09-25 01:11:07,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-25 01:11:07,221 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 44 [2020-09-25 01:11:07,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:07,222 INFO L225 Difference]: With dead ends: 64 [2020-09-25 01:11:07,222 INFO L226 Difference]: Without dead ends: 57 [2020-09-25 01:11:07,223 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-25 01:11:07,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-09-25 01:11:07,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 54. [2020-09-25 01:11:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-25 01:11:07,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2020-09-25 01:11:07,228 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 44 [2020-09-25 01:11:07,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:07,229 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2020-09-25 01:11:07,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 01:11:07,229 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2020-09-25 01:11:07,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2020-09-25 01:11:07,230 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:07,230 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:07,230 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-09-25 01:11:07,231 INFO L427 AbstractCegarLoop]: === Iteration 10 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:07,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:07,231 INFO L82 PathProgramCache]: Analyzing trace with hash -2107741888, now seen corresponding path program 4 times [2020-09-25 01:11:07,231 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:07,231 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205847173] [2020-09-25 01:11:07,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:07,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:07,252 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:07,281 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:07,465 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:08,094 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:08,180 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:08,357 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:08,408 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:08,623 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:08,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:08,812 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:08,812 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 60 [2020-09-25 01:11:08,812 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 9 [2020-09-25 01:11:08,813 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1569 [2020-09-25 01:11:08,813 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:08,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 7 [2020-09-25 01:11:08,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:08,813 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 39 [2020-09-25 01:11:08,814 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:08,871 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:08,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:08,873 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:08,874 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:08,875 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:08,875 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:08,875 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:08,875 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:08,875 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:08,876 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:08,876 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:08,881 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 4 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:08,881 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205847173] [2020-09-25 01:11:08,881 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:08,881 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8] total 8 [2020-09-25 01:11:08,882 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869749749] [2020-09-25 01:11:08,882 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-25 01:11:08,882 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:08,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-25 01:11:08,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2020-09-25 01:11:08,883 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand 8 states. [2020-09-25 01:11:09,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:09,007 INFO L93 Difference]: Finished difference Result 86 states and 90 transitions. [2020-09-25 01:11:09,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:11:09,008 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 51 [2020-09-25 01:11:09,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:09,009 INFO L225 Difference]: With dead ends: 86 [2020-09-25 01:11:09,009 INFO L226 Difference]: Without dead ends: 70 [2020-09-25 01:11:09,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2020-09-25 01:11:09,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-25 01:11:09,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 60. [2020-09-25 01:11:09,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-25 01:11:09,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2020-09-25 01:11:09,015 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 51 [2020-09-25 01:11:09,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:09,016 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2020-09-25 01:11:09,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-25 01:11:09,016 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2020-09-25 01:11:09,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2020-09-25 01:11:09,017 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:09,017 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:09,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-09-25 01:11:09,017 INFO L427 AbstractCegarLoop]: === Iteration 11 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:09,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:09,018 INFO L82 PathProgramCache]: Analyzing trace with hash 306267971, now seen corresponding path program 4 times [2020-09-25 01:11:09,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:09,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2049775444] [2020-09-25 01:11:09,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:09,040 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:09,287 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:09,288 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 62 [2020-09-25 01:11:09,288 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:09,288 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 257 [2020-09-25 01:11:09,288 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:09,288 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 12 [2020-09-25 01:11:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:09,289 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 50 [2020-09-25 01:11:09,289 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:09,444 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:09,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:09,446 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:09,447 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:09,447 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:09,447 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:09,447 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:09,448 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:09,448 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:09,449 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:09,457 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:09,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2049775444] [2020-09-25 01:11:09,458 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:09,458 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2020-09-25 01:11:09,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975144373] [2020-09-25 01:11:09,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-25 01:11:09,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:09,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-25 01:11:09,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2020-09-25 01:11:09,460 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand 12 states. [2020-09-25 01:11:09,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:09,649 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2020-09-25 01:11:09,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-25 01:11:09,649 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 53 [2020-09-25 01:11:09,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:09,650 INFO L225 Difference]: With dead ends: 73 [2020-09-25 01:11:09,650 INFO L226 Difference]: Without dead ends: 66 [2020-09-25 01:11:09,651 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-25 01:11:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-25 01:11:09,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2020-09-25 01:11:09,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-25 01:11:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2020-09-25 01:11:09,656 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 53 [2020-09-25 01:11:09,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:09,656 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2020-09-25 01:11:09,657 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-25 01:11:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2020-09-25 01:11:09,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2020-09-25 01:11:09,658 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:09,658 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:09,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-09-25 01:11:09,658 INFO L427 AbstractCegarLoop]: === Iteration 12 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:09,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:09,659 INFO L82 PathProgramCache]: Analyzing trace with hash -392261546, now seen corresponding path program 5 times [2020-09-25 01:11:09,659 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:09,659 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [428111410] [2020-09-25 01:11:09,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:09,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:09,681 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:09,716 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:09,896 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:10,719 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:10,924 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:11,021 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:11,209 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:11,409 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:11,525 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:11,674 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:11,760 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:11,863 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:11,864 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 69 [2020-09-25 01:11:11,864 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 11 [2020-09-25 01:11:11,865 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2191 [2020-09-25 01:11:11,865 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 8 [2020-09-25 01:11:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:11,865 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 49 [2020-09-25 01:11:11,866 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:11,949 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:11,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:11,952 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:11,953 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:11,953 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:11,953 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:11,954 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:11,954 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:11,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:11,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:11,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:11,955 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:11,960 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:11,960 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [428111410] [2020-09-25 01:11:11,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:11,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2020-09-25 01:11:11,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114565841] [2020-09-25 01:11:11,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-25 01:11:11,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:11,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-25 01:11:11,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-09-25 01:11:11,962 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand 9 states. [2020-09-25 01:11:12,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:12,074 INFO L93 Difference]: Finished difference Result 95 states and 99 transitions. [2020-09-25 01:11:12,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 01:11:12,074 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 60 [2020-09-25 01:11:12,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:12,075 INFO L225 Difference]: With dead ends: 95 [2020-09-25 01:11:12,075 INFO L226 Difference]: Without dead ends: 79 [2020-09-25 01:11:12,076 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2020-09-25 01:11:12,076 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-25 01:11:12,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 69. [2020-09-25 01:11:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-25 01:11:12,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2020-09-25 01:11:12,083 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 60 [2020-09-25 01:11:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:12,084 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2020-09-25 01:11:12,084 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-25 01:11:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2020-09-25 01:11:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2020-09-25 01:11:12,085 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:12,085 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:12,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-09-25 01:11:12,085 INFO L427 AbstractCegarLoop]: === Iteration 13 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:12,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:12,086 INFO L82 PathProgramCache]: Analyzing trace with hash -384565031, now seen corresponding path program 5 times [2020-09-25 01:11:12,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:12,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053089489] [2020-09-25 01:11:12,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:12,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:12,114 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:12,443 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:12,444 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 71 [2020-09-25 01:11:12,444 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:12,445 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 341 [2020-09-25 01:11:12,445 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:12,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 14 [2020-09-25 01:11:12,445 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:12,446 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 59 [2020-09-25 01:11:12,446 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:12,696 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:12,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:12,698 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:12,700 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:12,701 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:12,701 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:12,701 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 2 [2020-09-25 01:11:12,702 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:12,702 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:12,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:12,703 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:12,703 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:12,727 INFO L134 CoverageAnalysis]: Checked inductivity of 115 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:12,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053089489] [2020-09-25 01:11:12,728 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:12,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15] total 15 [2020-09-25 01:11:12,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89140852] [2020-09-25 01:11:12,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-25 01:11:12,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:12,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-25 01:11:12,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2020-09-25 01:11:12,732 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand 15 states. [2020-09-25 01:11:13,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:13,027 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2020-09-25 01:11:13,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-25 01:11:13,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 62 [2020-09-25 01:11:13,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:13,028 INFO L225 Difference]: With dead ends: 82 [2020-09-25 01:11:13,028 INFO L226 Difference]: Without dead ends: 75 [2020-09-25 01:11:13,029 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2020-09-25 01:11:13,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-25 01:11:13,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2020-09-25 01:11:13,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-25 01:11:13,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2020-09-25 01:11:13,034 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 62 [2020-09-25 01:11:13,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:13,034 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2020-09-25 01:11:13,034 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-25 01:11:13,034 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2020-09-25 01:11:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2020-09-25 01:11:13,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:13,036 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:13,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2020-09-25 01:11:13,036 INFO L427 AbstractCegarLoop]: === Iteration 14 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:13,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:13,036 INFO L82 PathProgramCache]: Analyzing trace with hash -1192623616, now seen corresponding path program 6 times [2020-09-25 01:11:13,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:13,037 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26187485] [2020-09-25 01:11:13,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:13,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:13,059 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:13,090 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:13,292 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:13,601 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,005 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,564 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:14,938 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,212 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,507 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,592 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,799 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:15,932 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:16,047 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:16,312 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:16,313 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 78 [2020-09-25 01:11:16,313 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 13 [2020-09-25 01:11:16,313 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3263 [2020-09-25 01:11:16,313 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:16,313 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 9 [2020-09-25 01:11:16,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:16,314 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 57 [2020-09-25 01:11:16,314 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:16,387 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:16,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:16,389 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:16,390 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:16,390 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:16,390 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:16,391 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:16,391 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:16,391 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:16,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:16,392 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:16,392 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:16,397 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 6 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:16,397 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26187485] [2020-09-25 01:11:16,398 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:16,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10] total 10 [2020-09-25 01:11:16,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963789261] [2020-09-25 01:11:16,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-25 01:11:16,399 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:16,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-25 01:11:16,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2020-09-25 01:11:16,399 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand 10 states. [2020-09-25 01:11:16,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:16,532 INFO L93 Difference]: Finished difference Result 104 states and 108 transitions. [2020-09-25 01:11:16,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 01:11:16,533 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 69 [2020-09-25 01:11:16,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:16,534 INFO L225 Difference]: With dead ends: 104 [2020-09-25 01:11:16,535 INFO L226 Difference]: Without dead ends: 88 [2020-09-25 01:11:16,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2020-09-25 01:11:16,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-25 01:11:16,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 78. [2020-09-25 01:11:16,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-25 01:11:16,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2020-09-25 01:11:16,547 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 69 [2020-09-25 01:11:16,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:16,550 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2020-09-25 01:11:16,550 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-25 01:11:16,550 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2020-09-25 01:11:16,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2020-09-25 01:11:16,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:16,551 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:16,551 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2020-09-25 01:11:16,552 INFO L427 AbstractCegarLoop]: === Iteration 15 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:16,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:16,552 INFO L82 PathProgramCache]: Analyzing trace with hash -733368317, now seen corresponding path program 6 times [2020-09-25 01:11:16,552 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:16,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [445113915] [2020-09-25 01:11:16,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:16,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:16,587 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:16,951 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:16,952 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 80 [2020-09-25 01:11:16,952 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:16,953 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 381 [2020-09-25 01:11:16,953 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:16,953 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 16 [2020-09-25 01:11:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:16,954 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 68 [2020-09-25 01:11:16,954 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:17,191 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:17,193 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:17,194 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:17,195 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:17,195 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:17,195 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:17,196 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:17,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:17,196 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:17,197 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:17,197 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 1 [2020-09-25 01:11:17,215 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:17,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [445113915] [2020-09-25 01:11:17,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:17,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17] total 17 [2020-09-25 01:11:17,218 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220643542] [2020-09-25 01:11:17,218 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-25 01:11:17,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:17,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-25 01:11:17,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2020-09-25 01:11:17,220 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand 17 states. [2020-09-25 01:11:17,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:17,530 INFO L93 Difference]: Finished difference Result 91 states and 92 transitions. [2020-09-25 01:11:17,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-25 01:11:17,531 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 71 [2020-09-25 01:11:17,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:17,532 INFO L225 Difference]: With dead ends: 91 [2020-09-25 01:11:17,532 INFO L226 Difference]: Without dead ends: 84 [2020-09-25 01:11:17,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2020-09-25 01:11:17,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-25 01:11:17,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 81. [2020-09-25 01:11:17,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-25 01:11:17,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 82 transitions. [2020-09-25 01:11:17,542 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 82 transitions. Word has length 71 [2020-09-25 01:11:17,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:17,542 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 82 transitions. [2020-09-25 01:11:17,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-25 01:11:17,543 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 82 transitions. [2020-09-25 01:11:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2020-09-25 01:11:17,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:17,548 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:17,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2020-09-25 01:11:17,550 INFO L427 AbstractCegarLoop]: === Iteration 16 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1330458730, now seen corresponding path program 7 times [2020-09-25 01:11:17,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:17,551 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [651336015] [2020-09-25 01:11:17,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:17,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:17,575 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:17,649 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:17,929 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:18,485 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:18,615 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:18,962 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:19,245 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:19,746 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:20,204 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:20,627 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:20,788 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:20,964 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:21,081 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:21,220 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:21,401 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:21,527 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:21,527 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 87 [2020-09-25 01:11:21,528 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 15 [2020-09-25 01:11:21,528 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 3963 [2020-09-25 01:11:21,528 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:21,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 10 [2020-09-25 01:11:21,528 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 12 [2020-09-25 01:11:21,529 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 66 [2020-09-25 01:11:21,529 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:21,612 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:21,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:21,614 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:21,615 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:21,615 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:21,615 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:21,616 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:21,616 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:21,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:21,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:21,616 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:21,616 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:21,623 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 7 proven. 203 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:21,623 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [651336015] [2020-09-25 01:11:21,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:21,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11] total 11 [2020-09-25 01:11:21,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404255993] [2020-09-25 01:11:21,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-25 01:11:21,625 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:21,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-25 01:11:21,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2020-09-25 01:11:21,625 INFO L87 Difference]: Start difference. First operand 81 states and 82 transitions. Second operand 11 states. [2020-09-25 01:11:21,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:21,765 INFO L93 Difference]: Finished difference Result 113 states and 117 transitions. [2020-09-25 01:11:21,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-25 01:11:21,765 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 78 [2020-09-25 01:11:21,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:21,766 INFO L225 Difference]: With dead ends: 113 [2020-09-25 01:11:21,766 INFO L226 Difference]: Without dead ends: 97 [2020-09-25 01:11:21,767 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2020-09-25 01:11:21,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-25 01:11:21,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 87. [2020-09-25 01:11:21,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-25 01:11:21,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 88 transitions. [2020-09-25 01:11:21,772 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 88 transitions. Word has length 78 [2020-09-25 01:11:21,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:21,772 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 88 transitions. [2020-09-25 01:11:21,772 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-25 01:11:21,772 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 88 transitions. [2020-09-25 01:11:21,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2020-09-25 01:11:21,773 INFO L414 BasicCegarLoop]: Found error trace [2020-09-25 01:11:21,773 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-25 01:11:21,774 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2020-09-25 01:11:21,774 INFO L427 AbstractCegarLoop]: === Iteration 17 === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-25 01:11:21,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-25 01:11:21,774 INFO L82 PathProgramCache]: Analyzing trace with hash -48926695, now seen corresponding path program 7 times [2020-09-25 01:11:21,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2020-09-25 01:11:21,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1354283714] [2020-09-25 01:11:21,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-25 01:11:21,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:21,798 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:22,208 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:22,209 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 89 [2020-09-25 01:11:22,209 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:22,209 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 421 [2020-09-25 01:11:22,209 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 18 [2020-09-25 01:11:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 11 [2020-09-25 01:11:22,210 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 77 [2020-09-25 01:11:22,210 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:22,416 INFO L375 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2020-09-25 01:11:22,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-25 01:11:22,417 FATAL L256 erpolLogProxyWrapper]: Now shrinking... [2020-09-25 01:11:22,418 FATAL L256 erpolLogProxyWrapper]: Timeout: 5000 [2020-09-25 01:11:22,418 FATAL L256 erpolLogProxyWrapper]: Cardinality of Constraint set: 8 [2020-09-25 01:11:22,418 FATAL L256 erpolLogProxyWrapper]: Number of enumerated Muses: 1 [2020-09-25 01:11:22,419 FATAL L256 erpolLogProxyWrapper]: Time needed for enumeration: 1 [2020-09-25 01:11:22,419 FATAL L256 erpolLogProxyWrapper]: Heuristic: DEEPEST [2020-09-25 01:11:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has size: 1 [2020-09-25 01:11:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has depth: 2 [2020-09-25 01:11:22,419 FATAL L256 erpolLogProxyWrapper]: Chosen Mus has width: 1 [2020-09-25 01:11:22,420 FATAL L256 erpolLogProxyWrapper]: Time needed for Heuristics: 0 [2020-09-25 01:11:22,435 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 27 proven. 197 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-25 01:11:22,435 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1354283714] [2020-09-25 01:11:22,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 1 imperfect interpolant sequences. [2020-09-25 01:11:22,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18] total 18 [2020-09-25 01:11:22,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455720588] [2020-09-25 01:11:22,436 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-25 01:11:22,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2020-09-25 01:11:22,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-25 01:11:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2020-09-25 01:11:22,437 INFO L87 Difference]: Start difference. First operand 87 states and 88 transitions. Second operand 18 states. [2020-09-25 01:11:22,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-25 01:11:22,630 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2020-09-25 01:11:22,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-25 01:11:22,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 80 [2020-09-25 01:11:22,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-25 01:11:22,631 INFO L225 Difference]: With dead ends: 87 [2020-09-25 01:11:22,631 INFO L226 Difference]: Without dead ends: 0 [2020-09-25 01:11:22,632 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=175, Invalid=425, Unknown=0, NotChecked=0, Total=600 [2020-09-25 01:11:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-25 01:11:22,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-25 01:11:22,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-25 01:11:22,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-25 01:11:22,635 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 80 [2020-09-25 01:11:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-25 01:11:22,635 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-25 01:11:22,635 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-25 01:11:22,635 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-25 01:11:22,635 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-25 01:11:22,636 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2020-09-25 01:11:22,638 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2020-09-25 01:11:22,857 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 19 [2020-09-25 01:11:22,860 INFO L271 CegarLoopResult]: At program point ULTIMATE.initFINAL(line -1) the Hoare annotation is: true [2020-09-25 01:11:22,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.initEXIT(line -1) no Hoare annotation was computed. [2020-09-25 01:11:22,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2020-09-25 01:11:22,860 INFO L271 CegarLoopResult]: At program point L-1(line -1) the Hoare annotation is: true [2020-09-25 01:11:22,860 INFO L271 CegarLoopResult]: At program point ULTIMATE.startENTRY(line -1) the Hoare annotation is: true [2020-09-25 01:11:22,860 INFO L268 CegarLoopResult]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2020-09-25 01:11:22,861 INFO L268 CegarLoopResult]: For program point L4-3(lines 3 5) no Hoare annotation was computed. [2020-09-25 01:11:22,862 INFO L268 CegarLoopResult]: For program point assume_abort_if_notENTRY(lines 3 5) no Hoare annotation was computed. [2020-09-25 01:11:22,862 INFO L268 CegarLoopResult]: For program point L4(line 4) no Hoare annotation was computed. [2020-09-25 01:11:22,862 INFO L268 CegarLoopResult]: For program point L4-1(line 4) no Hoare annotation was computed. [2020-09-25 01:11:22,862 INFO L268 CegarLoopResult]: For program point assume_abort_if_notEXIT(lines 3 5) no Hoare annotation was computed. [2020-09-25 01:11:22,862 INFO L268 CegarLoopResult]: For program point mainEXIT(lines 13 22) no Hoare annotation was computed. [2020-09-25 01:11:22,862 INFO L268 CegarLoopResult]: For program point L17(line 17) no Hoare annotation was computed. [2020-09-25 01:11:22,863 INFO L268 CegarLoopResult]: For program point L15(line 15) no Hoare annotation was computed. [2020-09-25 01:11:22,863 INFO L268 CegarLoopResult]: For program point mainFINAL(lines 13 22) no Hoare annotation was computed. [2020-09-25 01:11:22,863 INFO L271 CegarLoopResult]: At program point mainENTRY(lines 13 22) the Hoare annotation is: true [2020-09-25 01:11:22,863 INFO L268 CegarLoopResult]: For program point L20(line 20) no Hoare annotation was computed. [2020-09-25 01:11:22,863 INFO L268 CegarLoopResult]: For program point L18(line 18) no Hoare annotation was computed. [2020-09-25 01:11:22,863 INFO L268 CegarLoopResult]: For program point L16-1(line 16) no Hoare annotation was computed. [2020-09-25 01:11:22,864 INFO L268 CegarLoopResult]: For program point L16-2(line 16) no Hoare annotation was computed. [2020-09-25 01:11:22,864 INFO L268 CegarLoopResult]: For program point L16-3(line 16) no Hoare annotation was computed. [2020-09-25 01:11:22,864 INFO L268 CegarLoopResult]: For program point L16-5(lines 16 19) no Hoare annotation was computed. [2020-09-25 01:11:22,864 INFO L268 CegarLoopResult]: For program point L16-6(line 16) no Hoare annotation was computed. [2020-09-25 01:11:22,864 INFO L268 CegarLoopResult]: For program point L16-7(line 16) no Hoare annotation was computed. [2020-09-25 01:11:22,864 INFO L268 CegarLoopResult]: For program point L16-9(line 16) no Hoare annotation was computed. [2020-09-25 01:11:22,864 INFO L268 CegarLoopResult]: For program point L16-10(line 16) no Hoare annotation was computed. [2020-09-25 01:11:22,865 INFO L264 CegarLoopResult]: At program point L16-11(lines 16 19) the Hoare annotation is: (let ((.cse0 (+ main_~x~0 2))) (or (and (< 0 (+ main_~y~0 1)) (<= (* 3 main_~y~0) .cse0) (<= 1 (+ main_~x~0 main_~y~0))) (and (<= (* 2 main_~y~0) .cse0) (<= 2 main_~y~0)))) [2020-09-25 01:11:22,865 INFO L264 CegarLoopResult]: At program point L16-12(lines 16 19) the Hoare annotation is: (<= main_~y~0 main_~x~0) [2020-09-25 01:11:22,865 INFO L271 CegarLoopResult]: At program point __VERIFIER_assertENTRY(lines 6 11) the Hoare annotation is: true [2020-09-25 01:11:22,865 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertEXIT(lines 6 11) no Hoare annotation was computed. [2020-09-25 01:11:22,865 INFO L268 CegarLoopResult]: For program point L8(line 8) no Hoare annotation was computed. [2020-09-25 01:11:22,865 INFO L268 CegarLoopResult]: For program point L7(lines 7 9) no Hoare annotation was computed. [2020-09-25 01:11:22,866 INFO L268 CegarLoopResult]: For program point L7-2(lines 6 11) no Hoare annotation was computed. [2020-09-25 01:11:22,866 INFO L268 CegarLoopResult]: For program point __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION(line 8) no Hoare annotation was computed. [2020-09-25 01:11:22,893 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 25.09 01:11:22 BoogieIcfgContainer [2020-09-25 01:11:22,893 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-25 01:11:22,900 INFO L168 Benchmark]: Toolchain (without parser) took 20694.23 ms. Allocated memory was 139.5 MB in the beginning and 372.8 MB in the end (delta: 233.3 MB). Free memory was 102.6 MB in the beginning and 342.6 MB in the end (delta: -240.0 MB). Peak memory consumption was 243.8 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:22,902 INFO L168 Benchmark]: CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-09-25 01:11:22,907 INFO L168 Benchmark]: CACSL2BoogieTranslator took 303.50 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:22,908 INFO L168 Benchmark]: Boogie Preprocessor took 113.58 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 181.8 MB in the end (delta: -89.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:22,908 INFO L168 Benchmark]: RCFGBuilder took 325.22 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 168.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:22,911 INFO L168 Benchmark]: TraceAbstraction took 19942.91 ms. Allocated memory was 201.9 MB in the beginning and 372.8 MB in the end (delta: 170.9 MB). Free memory was 167.3 MB in the beginning and 342.6 MB in the end (delta: -175.3 MB). Peak memory consumption was 246.1 MB. Max. memory is 7.1 GB. [2020-09-25 01:11:22,919 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28 ms. Allocated memory is still 139.5 MB. Free memory was 120.9 MB in the beginning and 120.7 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 303.50 ms. Allocated memory is still 139.5 MB. Free memory was 102.0 MB in the beginning and 92.2 MB in the end (delta: 9.7 MB). Peak memory consumption was 9.7 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 113.58 ms. Allocated memory was 139.5 MB in the beginning and 201.9 MB in the end (delta: 62.4 MB). Free memory was 92.2 MB in the beginning and 181.8 MB in the end (delta: -89.6 MB). Peak memory consumption was 13.5 MB. Max. memory is 7.1 GB. * RCFGBuilder took 325.22 ms. Allocated memory is still 201.9 MB. Free memory was 181.8 MB in the beginning and 168.0 MB in the end (delta: 13.9 MB). Peak memory consumption was 13.9 MB. Max. memory is 7.1 GB. * TraceAbstraction took 19942.91 ms. Allocated memory was 201.9 MB in the beginning and 372.8 MB in the end (delta: 170.9 MB). Free memory was 167.3 MB in the beginning and 342.6 MB in the end (delta: -175.3 MB). Peak memory consumption was 246.1 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - PositiveResult [Line: 8]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 16]: Loop Invariant Derived loop invariant: ((0 < y + 1 && 3 * y <= x + 2) && 1 <= x + y) || (2 * y <= x + 2 && 2 <= y) - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 34 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 19.5s, OverallIterations: 17, TraceHistogramMax: 8, AutomataDifference: 2.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.2s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 452 SDtfs, 742 SDslu, 2427 SDs, 0 SdLazy, 973 SolverSat, 137 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 0.8s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 272 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 2.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=87occurred in iteration=16, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 102 StatesRemovedByMinimization, 15 NontrivialMinimizations, HoareAnnotationStatistics: 0.0s HoareAnnotationTime, 7 LocationsWithAnnotation, 23 PreInvPairs, 38 NumberOfFragments, 38 HoareAnnotationTreeSize, 23 FomulaSimplifications, 165 FormulaSimplificationTreeSizeReduction, 0.0s HoareSimplificationTime, 7 FomulaSimplificationsInter, 144 FormulaSimplificationTreeSizeReductionInter, 0.1s HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.1s SatisfiabilityAnalysisTime, 16.4s InterpolantComputationTime, 771 NumberOfCodeBlocks, 771 NumberOfCodeBlocksAsserted, 17 NumberOfCheckSat, 754 ConstructedInterpolants, 0 QuantifiedInterpolants, 161964 SizeOfPredicates, 0 NumberOfNonLiveVariables, 0 ConjunctsInSsa, 0 ConjunctsInUnsatCore, 17 InterpolantComputations, 3 PerfectInterpolantSequences, 47/1232 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...