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 -s ../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf -i ../../../trunk/examples/svcomp/eca-rers2012/Problem16_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-673a906-m [2019-10-02 21:27:08,582 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-02 21:27:08,584 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-02 21:27:08,598 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-02 21:27:08,618 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-02 21:27:08,621 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-02 21:27:08,623 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-02 21:27:08,625 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-02 21:27:08,626 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-02 21:27:08,627 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-02 21:27:08,631 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-02 21:27:08,632 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-02 21:27:08,636 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-02 21:27:08,637 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-02 21:27:08,639 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-02 21:27:08,640 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-02 21:27:08,643 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-02 21:27:08,657 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-02 21:27:08,659 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-02 21:27:08,661 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-02 21:27:08,663 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/ai/svcomp-Reach-32bit-Automizer_Default+AIv2_INT.epf [2019-10-02 21:27:08,686 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-02 21:27:08,687 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-02 21:27:08,687 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-10-02 21:27:08,688 INFO L138 SettingsManager]: * Log level for plugins=info [2019-10-02 21:27:08,688 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-10-02 21:27:08,688 INFO L138 SettingsManager]: * User list type=DISABLED [2019-10-02 21:27:08,689 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-10-02 21:27:08,689 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-10-02 21:27:08,689 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-10-02 21:27:08,689 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-10-02 21:27:08,691 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-02 21:27:08,692 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-02 21:27:08,692 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-02 21:27:08,692 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-02 21:27:08,692 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-02 21:27:08,693 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-02 21:27:08,693 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-02 21:27:08,693 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-02 21:27:08,693 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-02 21:27:08,693 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-02 21:27:08,694 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-02 21:27:08,694 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-10-02 21:27:08,694 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-02 21:27:08,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-02 21:27:08,695 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-02 21:27:08,695 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-02 21:27:08,695 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-10-02 21:27:08,695 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-02 21:27:08,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-10-02 21:27:08,695 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-10-02 21:27:08,745 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-02 21:27:08,761 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-02 21:27:08,767 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-02 21:27:08,769 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-02 21:27:08,769 INFO L275 PluginConnector]: CDTParser initialized [2019-10-02 21:27:08,770 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem16_label23.c [2019-10-02 21:27:08,831 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f197e37/e6733cf147684c82ab31444a87b6de73/FLAG7b2687865 [2019-10-02 21:27:09,471 INFO L306 CDTParser]: Found 1 translation units. [2019-10-02 21:27:09,472 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem16_label23.c [2019-10-02 21:27:09,490 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f197e37/e6733cf147684c82ab31444a87b6de73/FLAG7b2687865 [2019-10-02 21:27:09,646 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c7f197e37/e6733cf147684c82ab31444a87b6de73 [2019-10-02 21:27:09,655 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-02 21:27:09,657 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-02 21:27:09,658 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-02 21:27:09,658 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-02 21:27:09,661 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-02 21:27:09,662 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:27:09" (1/1) ... [2019-10-02 21:27:09,665 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@261d964e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:09, skipping insertion in model container [2019-10-02 21:27:09,665 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.10 09:27:09" (1/1) ... [2019-10-02 21:27:09,673 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-02 21:27:09,745 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-02 21:27:10,512 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:27:10,521 INFO L188 MainTranslator]: Completed pre-run [2019-10-02 21:27:11,066 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-02 21:27:11,085 INFO L192 MainTranslator]: Completed translation [2019-10-02 21:27:11,086 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11 WrapperNode [2019-10-02 21:27:11,086 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-02 21:27:11,087 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-02 21:27:11,087 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-02 21:27:11,087 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-02 21:27:11,101 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (1/1) ... [2019-10-02 21:27:11,102 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (1/1) ... [2019-10-02 21:27:11,143 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (1/1) ... [2019-10-02 21:27:11,144 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (1/1) ... [2019-10-02 21:27:11,208 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (1/1) ... [2019-10-02 21:27:11,223 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (1/1) ... [2019-10-02 21:27:11,239 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (1/1) ... [2019-10-02 21:27:11,255 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-02 21:27:11,255 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-02 21:27:11,256 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-02 21:27:11,256 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-02 21:27:11,257 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (1/1) ... No working directory specified, using /storage/repos/ultimate/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 [2019-10-02 21:27:11,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-02 21:27:11,316 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-02 21:27:11,316 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-02 21:27:11,316 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output2 [2019-10-02 21:27:11,317 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-02 21:27:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-02 21:27:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output2 [2019-10-02 21:27:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-02 21:27:11,317 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-02 21:27:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-02 21:27:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-02 21:27:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-02 21:27:11,318 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-02 21:27:13,706 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-02 21:27:13,707 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-02 21:27:13,709 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:27:13 BoogieIcfgContainer [2019-10-02 21:27:13,709 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-02 21:27:13,711 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-02 21:27:13,711 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-02 21:27:13,714 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-02 21:27:13,714 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.10 09:27:09" (1/3) ... [2019-10-02 21:27:13,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5439efa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:27:13, skipping insertion in model container [2019-10-02 21:27:13,716 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.10 09:27:11" (2/3) ... [2019-10-02 21:27:13,716 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5439efa2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.10 09:27:13, skipping insertion in model container [2019-10-02 21:27:13,717 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.10 09:27:13" (3/3) ... [2019-10-02 21:27:13,718 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem16_label23.c [2019-10-02 21:27:13,730 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-02 21:27:13,745 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-02 21:27:13,762 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-02 21:27:13,799 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-10-02 21:27:13,799 INFO L378 AbstractCegarLoop]: Hoare is false [2019-10-02 21:27:13,799 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-02 21:27:13,799 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-02 21:27:13,799 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-02 21:27:13,799 INFO L382 AbstractCegarLoop]: Difference is false [2019-10-02 21:27:13,800 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-02 21:27:13,800 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-02 21:27:13,839 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states. [2019-10-02 21:27:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2019-10-02 21:27:13,851 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:27:13,852 INFO L411 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:27:13,854 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:27:13,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:27:13,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1421899030, now seen corresponding path program 1 times [2019-10-02 21:27:13,862 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:27:13,918 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:27:13,919 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:27:13,919 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:27:13,919 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:27:13,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:27:14,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:27:14,102 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:27:14,102 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-02 21:27:14,103 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:27:14,108 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-02 21:27:14,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-02 21:27:14,124 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:27:14,126 INFO L87 Difference]: Start difference. First operand 409 states. Second operand 3 states. [2019-10-02 21:27:16,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:27:16,700 INFO L93 Difference]: Finished difference Result 750 states and 1275 transitions. [2019-10-02 21:27:16,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-02 21:27:16,707 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 37 [2019-10-02 21:27:16,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:27:16,729 INFO L225 Difference]: With dead ends: 750 [2019-10-02 21:27:16,730 INFO L226 Difference]: Without dead ends: 682 [2019-10-02 21:27:16,731 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-02 21:27:16,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2019-10-02 21:27:16,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 682. [2019-10-02 21:27:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 682 states. [2019-10-02 21:27:16,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 682 states to 682 states and 1166 transitions. [2019-10-02 21:27:16,825 INFO L78 Accepts]: Start accepts. Automaton has 682 states and 1166 transitions. Word has length 37 [2019-10-02 21:27:16,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:27:16,825 INFO L475 AbstractCegarLoop]: Abstraction has 682 states and 1166 transitions. [2019-10-02 21:27:16,825 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-02 21:27:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 682 states and 1166 transitions. [2019-10-02 21:27:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2019-10-02 21:27:16,832 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:27:16,833 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:27:16,833 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:27:16,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:27:16,834 INFO L82 PathProgramCache]: Analyzing trace with hash 1726554019, now seen corresponding path program 1 times [2019-10-02 21:27:16,834 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:27:16,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:27:16,836 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:27:16,836 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:27:16,836 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:27:16,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:27:17,075 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:27:17,075 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:27:17,076 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:27:17,076 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:27:17,078 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:27:17,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:27:17,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:27:17,079 INFO L87 Difference]: Start difference. First operand 682 states and 1166 transitions. Second operand 6 states. [2019-10-02 21:27:19,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:27:19,890 INFO L93 Difference]: Finished difference Result 1057 states and 1733 transitions. [2019-10-02 21:27:19,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:27:19,890 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 144 [2019-10-02 21:27:19,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:27:19,900 INFO L225 Difference]: With dead ends: 1057 [2019-10-02 21:27:19,900 INFO L226 Difference]: Without dead ends: 1057 [2019-10-02 21:27:19,901 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:27:19,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1057 states. [2019-10-02 21:27:19,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1057 to 1039. [2019-10-02 21:27:19,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1039 states. [2019-10-02 21:27:19,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1039 states to 1039 states and 1701 transitions. [2019-10-02 21:27:19,953 INFO L78 Accepts]: Start accepts. Automaton has 1039 states and 1701 transitions. Word has length 144 [2019-10-02 21:27:19,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:27:19,954 INFO L475 AbstractCegarLoop]: Abstraction has 1039 states and 1701 transitions. [2019-10-02 21:27:19,954 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:27:19,955 INFO L276 IsEmpty]: Start isEmpty. Operand 1039 states and 1701 transitions. [2019-10-02 21:27:19,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2019-10-02 21:27:19,958 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:27:19,958 INFO L411 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:27:19,958 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:27:19,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:27:19,959 INFO L82 PathProgramCache]: Analyzing trace with hash -117387014, now seen corresponding path program 1 times [2019-10-02 21:27:19,959 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:27:19,960 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:27:19,960 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:27:19,961 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:27:19,961 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:27:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:27:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 30 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-02 21:27:20,205 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-02 21:27:20,205 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-02 21:27:20,205 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:27:20,207 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-02 21:27:20,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-02 21:27:20,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-02 21:27:20,208 INFO L87 Difference]: Start difference. First operand 1039 states and 1701 transitions. Second operand 6 states. [2019-10-02 21:27:22,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-02 21:27:22,701 INFO L93 Difference]: Finished difference Result 2097 states and 3143 transitions. [2019-10-02 21:27:22,702 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-02 21:27:22,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 147 [2019-10-02 21:27:22,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-02 21:27:22,726 INFO L225 Difference]: With dead ends: 2097 [2019-10-02 21:27:22,727 INFO L226 Difference]: Without dead ends: 2097 [2019-10-02 21:27:22,730 INFO L640 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-02 21:27:22,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2097 states. [2019-10-02 21:27:22,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2097 to 2081. [2019-10-02 21:27:22,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2081 states. [2019-10-02 21:27:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2081 states to 2081 states and 3125 transitions. [2019-10-02 21:27:22,855 INFO L78 Accepts]: Start accepts. Automaton has 2081 states and 3125 transitions. Word has length 147 [2019-10-02 21:27:22,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-02 21:27:22,856 INFO L475 AbstractCegarLoop]: Abstraction has 2081 states and 3125 transitions. [2019-10-02 21:27:22,857 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-02 21:27:22,857 INFO L276 IsEmpty]: Start isEmpty. Operand 2081 states and 3125 transitions. [2019-10-02 21:27:22,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2019-10-02 21:27:22,869 INFO L403 BasicCegarLoop]: Found error trace [2019-10-02 21:27:22,869 INFO L411 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-02 21:27:22,870 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-02 21:27:22,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:27:22,870 INFO L82 PathProgramCache]: Analyzing trace with hash -462230653, now seen corresponding path program 1 times [2019-10-02 21:27:22,871 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-10-02 21:27:22,874 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:27:22,875 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-02 21:27:22,875 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-02 21:27:22,875 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-10-02 21:27:22,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-02 21:27:23,181 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 60 proven. 106 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-02 21:27:23,181 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-10-02 21:27:23,182 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-10-02 21:27:23,183 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 263 with the following transitions: [2019-10-02 21:27:23,185 INFO L207 CegarAbsIntRunner]: [0], [1], [180], [187], [195], [203], [211], [219], [227], [235], [243], [251], [259], [267], [275], [283], [291], [299], [307], [315], [323], [331], [339], [347], [355], [363], [371], [379], [383], [385], [388], [396], [404], [412], [420], [428], [436], [444], [452], [460], [468], [476], [484], [492], [500], [508], [516], [524], [532], [540], [548], [556], [564], [572], [580], [588], [596], [604], [612], [620], [628], [636], [644], [652], [660], [668], [673], [677], [681], [685], [689], [693], [697], [701], [705], [709], [713], [717], [721], [725], [729], [733], [737], [741], [745], [749], [753], [757], [761], [765], [769], [773], [777], [781], [785], [789], [793], [797], [801], [805], [809], [813], [817], [821], [825], [829], [833], [836], [837], [841], [845], [849], [853], [856], [1552], [1556], [1565], [1569], [1571], [1578], [1579], [1580], [1582], [1583] [2019-10-02 21:27:23,251 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-02 21:27:23,251 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-02 21:27:30,874 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-02 21:27:30,876 INFO L272 AbstractInterpreter]: Visited 120 different actions 120 times. Never merged. Never widened. Performed 279 root evaluator evaluations with a maximum evaluation depth of 14. Performed 279 inverse root evaluator evaluations with a maximum inverse evaluation depth of 14. Never found a fixpoint. Largest state had 24 variables. [2019-10-02 21:27:30,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-02 21:27:30,880 INFO L403 sIntCurrentIteration]: Generating AbsInt predicates [2019-10-02 21:27:38,640 INFO L227 lantSequenceWeakener]: Weakened 243 states. On average, predicates are now at 77.75% of their original sizes. [2019-10-02 21:27:38,641 INFO L418 sIntCurrentIteration]: Unifying AI predicates [2019-10-02 21:27:38,740 INFO L420 sIntCurrentIteration]: We unified 261 AI predicates to 261 [2019-10-02 21:27:38,740 INFO L429 sIntCurrentIteration]: Finished generation of AbsInt predicates [2019-10-02 21:27:38,741 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2019-10-02 21:27:38,741 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [11] imperfect sequences [6] total 15 [2019-10-02 21:27:38,741 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-10-02 21:27:38,742 INFO L454 AbstractCegarLoop]: Interpolant automaton has 11 states [2019-10-02 21:27:38,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2019-10-02 21:27:38,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2019-10-02 21:27:38,743 INFO L87 Difference]: Start difference. First operand 2081 states and 3125 transitions. Second operand 11 states. [2019-10-02 21:27:57,775 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.