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/Problem01_label20.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-112bae1 [2019-09-09 06:09:55,664 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-09-09 06:09:55,666 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-09-09 06:09:55,677 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-09-09 06:09:55,712 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 [2019-09-09 06:09:55,727 INFO L113 SettingsManager]: Loading preferences was successful [2019-09-09 06:09:55,727 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-09-09 06:09:55,728 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2019-09-09 06:09:55,728 INFO L138 SettingsManager]: * Log level for plugins=info [2019-09-09 06:09:55,729 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-09-09 06:09:55,729 INFO L138 SettingsManager]: * User list type=DISABLED [2019-09-09 06:09:55,729 INFO L138 SettingsManager]: * Ignore calls to and inside polymorphic procedures=false [2019-09-09 06:09:55,729 INFO L138 SettingsManager]: * Ignore calls to recursive procedures=false [2019-09-09 06:09:55,729 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-09-09 06:09:55,730 INFO L138 SettingsManager]: * Abstract domain=IntervalDomain [2019-09-09 06:09:55,730 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-09-09 06:09:55,730 INFO L138 SettingsManager]: * sizeof long=4 [2019-09-09 06:09:55,731 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-09-09 06:09:55,731 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-09-09 06:09:55,731 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-09-09 06:09:55,731 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-09-09 06:09:55,731 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-09-09 06:09:55,731 INFO L138 SettingsManager]: * sizeof long double=12 [2019-09-09 06:09:55,732 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-09-09 06:09:55,732 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-09-09 06:09:55,732 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-09-09 06:09:55,732 INFO L138 SettingsManager]: * Remove goto edges from RCFG=true [2019-09-09 06:09:55,733 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-09-09 06:09:55,733 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-09-09 06:09:55,733 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-09-09 06:09:55,733 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-09-09 06:09:55,733 INFO L138 SettingsManager]: * Trace refinement strategy=TAIPAN [2019-09-09 06:09:55,733 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-09-09 06:09:55,734 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-09-09 06:09:55,734 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-09-09 06:09:55,765 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-09-09 06:09:55,780 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-09-09 06:09:55,785 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-09-09 06:09:55,786 INFO L271 PluginConnector]: Initializing CDTParser... [2019-09-09 06:09:55,787 INFO L275 PluginConnector]: CDTParser initialized [2019-09-09 06:09:55,788 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label20.c [2019-09-09 06:09:55,845 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5e270fd/2ada897bcf544c519114c9b8a1d6da0e/FLAG0193a4201 [2019-09-09 06:09:56,397 INFO L306 CDTParser]: Found 1 translation units. [2019-09-09 06:09:56,398 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label20.c [2019-09-09 06:09:56,412 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5e270fd/2ada897bcf544c519114c9b8a1d6da0e/FLAG0193a4201 [2019-09-09 06:09:56,667 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6d5e270fd/2ada897bcf544c519114c9b8a1d6da0e [2019-09-09 06:09:56,675 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-09-09 06:09:56,677 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-09-09 06:09:56,678 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-09-09 06:09:56,678 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-09-09 06:09:56,681 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-09-09 06:09:56,682 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:09:56" (1/1) ... [2019-09-09 06:09:56,685 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5811e807 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:56, skipping insertion in model container [2019-09-09 06:09:56,685 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.09 06:09:56" (1/1) ... [2019-09-09 06:09:56,693 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-09-09 06:09:56,752 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-09-09 06:09:57,313 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:09:57,322 INFO L188 MainTranslator]: Completed pre-run [2019-09-09 06:09:57,448 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-09-09 06:09:57,464 INFO L192 MainTranslator]: Completed translation [2019-09-09 06:09:57,464 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57 WrapperNode [2019-09-09 06:09:57,464 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-09-09 06:09:57,465 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-09-09 06:09:57,465 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-09-09 06:09:57,465 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-09-09 06:09:57,475 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (1/1) ... [2019-09-09 06:09:57,476 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (1/1) ... [2019-09-09 06:09:57,493 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (1/1) ... [2019-09-09 06:09:57,493 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (1/1) ... [2019-09-09 06:09:57,545 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (1/1) ... [2019-09-09 06:09:57,556 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (1/1) ... [2019-09-09 06:09:57,560 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (1/1) ... [2019-09-09 06:09:57,567 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-09-09 06:09:57,567 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-09-09 06:09:57,567 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-09-09 06:09:57,568 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-09-09 06:09:57,569 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (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 [2019-09-09 06:09:57,621 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-09-09 06:09:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-09-09 06:09:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-09-09 06:09:57,622 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-09-09 06:09:57,623 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-09-09 06:09:57,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-09-09 06:09:57,623 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-09-09 06:09:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-09-09 06:09:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-09-09 06:09:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-09-09 06:09:57,624 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-09-09 06:09:58,782 INFO L278 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-09-09 06:09:58,783 INFO L283 CfgBuilder]: Removed 1 assume(true) statements. [2019-09-09 06:09:58,784 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:09:58 BoogieIcfgContainer [2019-09-09 06:09:58,784 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-09-09 06:09:58,785 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-09-09 06:09:58,785 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-09-09 06:09:58,788 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-09-09 06:09:58,788 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.09 06:09:56" (1/3) ... [2019-09-09 06:09:58,789 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8e1cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:09:58, skipping insertion in model container [2019-09-09 06:09:58,789 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.09 06:09:57" (2/3) ... [2019-09-09 06:09:58,790 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c8e1cbc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.09 06:09:58, skipping insertion in model container [2019-09-09 06:09:58,790 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.09 06:09:58" (3/3) ... [2019-09-09 06:09:58,792 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label20.c [2019-09-09 06:09:58,801 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-09-09 06:09:58,809 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-09-09 06:09:58,826 INFO L252 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-09-09 06:09:58,852 INFO L377 AbstractCegarLoop]: Interprodecural is true [2019-09-09 06:09:58,852 INFO L378 AbstractCegarLoop]: Hoare is false [2019-09-09 06:09:58,852 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-09-09 06:09:58,852 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-09-09 06:09:58,853 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-09-09 06:09:58,853 INFO L382 AbstractCegarLoop]: Difference is false [2019-09-09 06:09:58,853 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-09-09 06:09:58,853 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-09-09 06:09:58,875 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-09-09 06:09:58,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2019-09-09 06:09:58,888 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:09:58,889 INFO L399 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, 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] [2019-09-09 06:09:58,891 INFO L418 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:09:58,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:09:58,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1090826438, now seen corresponding path program 1 times [2019-09-09 06:09:58,899 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:09:58,942 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:09:58,942 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:09:58,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:09:58,943 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:09:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:09:59,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:09:59,272 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:09:59,272 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 06:09:59,272 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:09:59,279 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 06:09:59,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 06:09:59,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:09:59,297 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 3 states. [2019-09-09 06:10:00,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:00,211 INFO L93 Difference]: Finished difference Result 346 states and 508 transitions. [2019-09-09 06:10:00,212 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 06:10:00,213 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 78 [2019-09-09 06:10:00,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:00,230 INFO L225 Difference]: With dead ends: 346 [2019-09-09 06:10:00,230 INFO L226 Difference]: Without dead ends: 278 [2019-09-09 06:10:00,233 INFO L628 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 [2019-09-09 06:10:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-09-09 06:10:00,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-09-09 06:10:00,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-09-09 06:10:00,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 400 transitions. [2019-09-09 06:10:00,300 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 400 transitions. Word has length 78 [2019-09-09 06:10:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:00,301 INFO L475 AbstractCegarLoop]: Abstraction has 278 states and 400 transitions. [2019-09-09 06:10:00,301 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 06:10:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 400 transitions. [2019-09-09 06:10:00,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2019-09-09 06:10:00,306 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:00,307 INFO L399 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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] [2019-09-09 06:10:00,307 INFO L418 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:00,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:00,308 INFO L82 PathProgramCache]: Analyzing trace with hash -2093961699, now seen corresponding path program 1 times [2019-09-09 06:10:00,308 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:00,309 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:00,310 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:00,310 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:00,310 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:00,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:00,431 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:00,432 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:10:00,432 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 06:10:00,432 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:10:00,434 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 06:10:00,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 06:10:00,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 06:10:00,435 INFO L87 Difference]: Start difference. First operand 278 states and 400 transitions. Second operand 6 states. [2019-09-09 06:10:01,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:01,277 INFO L93 Difference]: Finished difference Result 431 states and 612 transitions. [2019-09-09 06:10:01,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:10:01,277 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 88 [2019-09-09 06:10:01,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:01,283 INFO L225 Difference]: With dead ends: 431 [2019-09-09 06:10:01,283 INFO L226 Difference]: Without dead ends: 431 [2019-09-09 06:10:01,284 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-09-09 06:10:01,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-09-09 06:10:01,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 419. [2019-09-09 06:10:01,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 419 states. [2019-09-09 06:10:01,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 588 transitions. [2019-09-09 06:10:01,316 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 588 transitions. Word has length 88 [2019-09-09 06:10:01,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:01,317 INFO L475 AbstractCegarLoop]: Abstraction has 419 states and 588 transitions. [2019-09-09 06:10:01,317 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 06:10:01,317 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 588 transitions. [2019-09-09 06:10:01,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2019-09-09 06:10:01,322 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:01,322 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 06:10:01,322 INFO L418 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:01,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:01,323 INFO L82 PathProgramCache]: Analyzing trace with hash 109350879, now seen corresponding path program 1 times [2019-09-09 06:10:01,323 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:01,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:01,324 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:01,324 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:01,325 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:01,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:01,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:01,493 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:10:01,493 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 06:10:01,493 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:10:01,495 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 06:10:01,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 06:10:01,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:10:01,495 INFO L87 Difference]: Start difference. First operand 419 states and 588 transitions. Second operand 3 states. [2019-09-09 06:10:02,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:02,125 INFO L93 Difference]: Finished difference Result 828 states and 1098 transitions. [2019-09-09 06:10:02,125 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 06:10:02,125 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 89 [2019-09-09 06:10:02,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:02,136 INFO L225 Difference]: With dead ends: 828 [2019-09-09 06:10:02,136 INFO L226 Difference]: Without dead ends: 828 [2019-09-09 06:10:02,136 INFO L628 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:10:02,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-09-09 06:10:02,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 828. [2019-09-09 06:10:02,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 828 states. [2019-09-09 06:10:02,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 828 states to 828 states and 1098 transitions. [2019-09-09 06:10:02,199 INFO L78 Accepts]: Start accepts. Automaton has 828 states and 1098 transitions. Word has length 89 [2019-09-09 06:10:02,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:02,200 INFO L475 AbstractCegarLoop]: Abstraction has 828 states and 1098 transitions. [2019-09-09 06:10:02,200 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 06:10:02,200 INFO L276 IsEmpty]: Start isEmpty. Operand 828 states and 1098 transitions. [2019-09-09 06:10:02,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2019-09-09 06:10:02,204 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:02,205 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 06:10:02,205 INFO L418 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:02,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:02,205 INFO L82 PathProgramCache]: Analyzing trace with hash 311463443, now seen corresponding path program 1 times [2019-09-09 06:10:02,206 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:02,206 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:02,207 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:02,207 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:02,207 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:02,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:02,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:02,360 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:10:02,360 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-09-09 06:10:02,360 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:10:02,362 INFO L454 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-09-09 06:10:02,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-09-09 06:10:02,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-09-09 06:10:02,363 INFO L87 Difference]: Start difference. First operand 828 states and 1098 transitions. Second operand 3 states. [2019-09-09 06:10:02,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:02,886 INFO L93 Difference]: Finished difference Result 1374 states and 1856 transitions. [2019-09-09 06:10:02,887 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-09-09 06:10:02,887 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 95 [2019-09-09 06:10:02,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:02,895 INFO L225 Difference]: With dead ends: 1374 [2019-09-09 06:10:02,895 INFO L226 Difference]: Without dead ends: 1374 [2019-09-09 06:10:02,896 INFO L628 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 [2019-09-09 06:10:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1374 states. [2019-09-09 06:10:02,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1374 to 1237. [2019-09-09 06:10:02,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1237 states. [2019-09-09 06:10:02,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1237 states to 1237 states and 1669 transitions. [2019-09-09 06:10:02,936 INFO L78 Accepts]: Start accepts. Automaton has 1237 states and 1669 transitions. Word has length 95 [2019-09-09 06:10:02,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:02,937 INFO L475 AbstractCegarLoop]: Abstraction has 1237 states and 1669 transitions. [2019-09-09 06:10:02,937 INFO L476 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-09-09 06:10:02,937 INFO L276 IsEmpty]: Start isEmpty. Operand 1237 states and 1669 transitions. [2019-09-09 06:10:02,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2019-09-09 06:10:02,941 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:02,942 INFO L399 BasicCegarLoop]: trace histogram [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] [2019-09-09 06:10:02,942 INFO L418 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:02,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:02,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1961778941, now seen corresponding path program 1 times [2019-09-09 06:10:02,943 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:02,943 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:02,944 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:02,944 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:02,944 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:02,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:03,085 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 22 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:03,085 INFO L312 seRefinementStrategy]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-09-09 06:10:03,086 INFO L327 seRefinementStrategy]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-09-09 06:10:03,086 INFO L257 anRefinementStrategy]: Using the first perfect interpolant sequence [2019-09-09 06:10:03,087 INFO L454 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-09-09 06:10:03,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-09-09 06:10:03,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-09-09 06:10:03,088 INFO L87 Difference]: Start difference. First operand 1237 states and 1669 transitions. Second operand 6 states. [2019-09-09 06:10:03,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-09-09 06:10:03,912 INFO L93 Difference]: Finished difference Result 1287 states and 1680 transitions. [2019-09-09 06:10:03,912 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-09-09 06:10:03,913 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 103 [2019-09-09 06:10:03,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-09-09 06:10:03,921 INFO L225 Difference]: With dead ends: 1287 [2019-09-09 06:10:03,921 INFO L226 Difference]: Without dead ends: 1287 [2019-09-09 06:10:03,922 INFO L628 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 [2019-09-09 06:10:03,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1287 states. [2019-09-09 06:10:03,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1287 to 1126. [2019-09-09 06:10:03,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1126 states. [2019-09-09 06:10:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1126 states to 1126 states and 1411 transitions. [2019-09-09 06:10:03,968 INFO L78 Accepts]: Start accepts. Automaton has 1126 states and 1411 transitions. Word has length 103 [2019-09-09 06:10:03,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-09-09 06:10:03,968 INFO L475 AbstractCegarLoop]: Abstraction has 1126 states and 1411 transitions. [2019-09-09 06:10:03,968 INFO L476 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-09-09 06:10:03,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1126 states and 1411 transitions. [2019-09-09 06:10:03,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2019-09-09 06:10:03,974 INFO L391 BasicCegarLoop]: Found error trace [2019-09-09 06:10:03,974 INFO L399 BasicCegarLoop]: trace histogram [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, 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] [2019-09-09 06:10:03,974 INFO L418 AbstractCegarLoop]: === Iteration 6 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-09-09 06:10:03,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-09-09 06:10:03,975 INFO L82 PathProgramCache]: Analyzing trace with hash -102961192, now seen corresponding path program 1 times [2019-09-09 06:10:03,975 INFO L69 tionRefinementEngine]: Using refinement strategy TaipanRefinementStrategy [2019-09-09 06:10:03,976 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:03,977 INFO L103 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-09-09 06:10:03,977 INFO L119 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-09-09 06:10:03,977 INFO L289 anRefinementStrategy]: Using traceCheck mode SMTINTERPOL with AssertCodeBlockOrder NOT_INCREMENTALLY (IT: Craig_TreeInterpolation) [2019-09-09 06:10:03,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-09-09 06:10:04,070 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 34 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-09-09 06:10:04,070 INFO L300 seRefinementStrategy]: The current sequences of interpolants are not accepted, trying to find more. [2019-09-09 06:10:04,071 INFO L193 anRefinementStrategy]: Switched to InterpolantGenerator mode ABSTRACT_INTERPRETATION [2019-09-09 06:10:04,072 INFO L205 CegarAbsIntRunner]: Running AI on error trace of length 113 with the following transitions: [2019-09-09 06:10:04,074 INFO L207 CegarAbsIntRunner]: [0], [1], [2], [5], [6], [10], [14], [18], [22], [26], [30], [34], [38], [42], [46], [50], [54], [58], [62], [66], [70], [74], [77], [78], [82], [86], [90], [94], [98], [102], [106], [110], [114], [118], [122], [126], [130], [134], [138], [142], [146], [150], [154], [158], [162], [166], [170], [174], [178], [182], [186], [190], [194], [198], [202], [206], [210], [214], [218], [222], [226], [230], [234], [238], [242], [246], [250], [254], [258], [262], [266], [269], [271], [757], [761], [770], [774], [776], [781], [782], [783], [785], [786] [2019-09-09 06:10:04,120 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-09-09 06:10:04,120 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)