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/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --abstractinterpretationv2.abstract.domain IntervalDomain --traceabstraction.trace.refinement.strategy TAIPAN --traceabstraction.abstract.interpretation.mode USE_PREDICATES -i ../../../trunk/examples/svcomp/eca-rers2012/Problem11_label03.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:29,083 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:29,086 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:29,101 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:02:29,117 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:29,121 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:29,122 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:29,124 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:29,125 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:29,126 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:29,129 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:29,131 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:29,136 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:29,137 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:29,139 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:29,140 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:29,144 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:29,163 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:29,166 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:29,168 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:29,169 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:02:29,191 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:29,192 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:29,194 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:29,194 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:29,194 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:29,195 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:29,195 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:29,195 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:29,195 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:29,195 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:29,197 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:29,197 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:29,197 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:29,198 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:29,198 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:29,198 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:29,198 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:29,199 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:29,199 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:29,199 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:29,199 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:29,200 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:29,200 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:29,200 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:29,200 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:29,200 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:29,201 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:29,201 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:29,201 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:02:29,533 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:29,553 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:29,557 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:29,558 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:29,559 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:29,560 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label03.c [2019-10-15 00:02:29,637 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae6ede65/0cd24247b4424acab170b75d564c1bc8/FLAG673bf7553 [2019-10-15 00:02:30,301 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:30,301 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label03.c [2019-10-15 00:02:30,320 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae6ede65/0cd24247b4424acab170b75d564c1bc8/FLAG673bf7553 [2019-10-15 00:02:30,508 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/9ae6ede65/0cd24247b4424acab170b75d564c1bc8 [2019-10-15 00:02:30,519 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:30,520 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:30,522 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:30,522 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:30,525 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:30,527 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:30" (1/1) ... [2019-10-15 00:02:30,530 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d46bbee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:30, skipping insertion in model container [2019-10-15 00:02:30,530 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:30" (1/1) ... [2019-10-15 00:02:30,538 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:30,603 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:31,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:31,274 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:31,454 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:31,479 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:31,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31 WrapperNode [2019-10-15 00:02:31,481 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:31,482 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:31,483 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:31,483 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:31,503 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,503 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,546 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,547 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,615 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,644 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,656 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (1/1) ... [2019-10-15 00:02:31,669 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:31,670 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:31,670 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:31,670 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:31,671 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (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 [2019-10-15 00:02:31,746 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:31,747 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:31,747 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:31,747 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:31,747 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:31,748 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:31,749 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:31,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:31,750 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:33,616 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:33,617 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:33,618 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:33 BoogieIcfgContainer [2019-10-15 00:02:33,619 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:33,621 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:33,621 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:33,625 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:33,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:30" (1/3) ... [2019-10-15 00:02:33,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28026e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:33, skipping insertion in model container [2019-10-15 00:02:33,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:31" (2/3) ... [2019-10-15 00:02:33,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28026e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:33, skipping insertion in model container [2019-10-15 00:02:33,628 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:33" (3/3) ... [2019-10-15 00:02:33,630 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label03.c [2019-10-15 00:02:33,643 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:33,655 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:33,672 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:33,704 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:33,704 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:33,705 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:33,705 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:33,705 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:33,705 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:33,705 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:33,706 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:33,735 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:02:33,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2019-10-15 00:02:33,744 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:33,746 INFO L380 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] [2019-10-15 00:02:33,748 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:33,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:33,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1474349029, now seen corresponding path program 1 times [2019-10-15 00:02:33,797 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:33,797 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399207075] [2019-10-15 00:02:33,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:33,798 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:33,798 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:33,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:34,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:34,199 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399207075] [2019-10-15 00:02:34,200 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:34,200 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:34,200 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983810493] [2019-10-15 00:02:34,207 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:34,208 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:34,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:34,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:34,228 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 4 states. [2019-10-15 00:02:36,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:36,446 INFO L93 Difference]: Finished difference Result 981 states and 1757 transitions. [2019-10-15 00:02:36,450 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:36,452 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 36 [2019-10-15 00:02:36,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:36,474 INFO L225 Difference]: With dead ends: 981 [2019-10-15 00:02:36,474 INFO L226 Difference]: Without dead ends: 622 [2019-10-15 00:02:36,483 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:36,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2019-10-15 00:02:36,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 622. [2019-10-15 00:02:36,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 622 states. [2019-10-15 00:02:36,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 880 transitions. [2019-10-15 00:02:36,601 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 880 transitions. Word has length 36 [2019-10-15 00:02:36,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:36,602 INFO L462 AbstractCegarLoop]: Abstraction has 622 states and 880 transitions. [2019-10-15 00:02:36,603 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:36,603 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 880 transitions. [2019-10-15 00:02:36,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2019-10-15 00:02:36,620 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:36,622 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:36,622 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:36,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:36,624 INFO L82 PathProgramCache]: Analyzing trace with hash -465501430, now seen corresponding path program 1 times [2019-10-15 00:02:36,624 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:36,625 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [24906484] [2019-10-15 00:02:36,625 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:36,625 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:36,625 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:36,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:36,941 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:36,942 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [24906484] [2019-10-15 00:02:36,942 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:36,943 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:36,943 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819746316] [2019-10-15 00:02:36,949 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:36,949 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:36,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:36,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:36,950 INFO L87 Difference]: Start difference. First operand 622 states and 880 transitions. Second operand 6 states. [2019-10-15 00:02:38,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:38,865 INFO L93 Difference]: Finished difference Result 1839 states and 2644 transitions. [2019-10-15 00:02:38,866 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:02:38,866 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 116 [2019-10-15 00:02:38,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:38,875 INFO L225 Difference]: With dead ends: 1839 [2019-10-15 00:02:38,876 INFO L226 Difference]: Without dead ends: 1223 [2019-10-15 00:02:38,878 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2019-10-15 00:02:38,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1223 states. [2019-10-15 00:02:38,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1223 to 1210. [2019-10-15 00:02:38,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1210 states. [2019-10-15 00:02:38,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1601 transitions. [2019-10-15 00:02:38,935 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1601 transitions. Word has length 116 [2019-10-15 00:02:38,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:38,936 INFO L462 AbstractCegarLoop]: Abstraction has 1210 states and 1601 transitions. [2019-10-15 00:02:38,936 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:38,936 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1601 transitions. [2019-10-15 00:02:38,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2019-10-15 00:02:38,939 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:38,939 INFO L380 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:38,939 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:38,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:38,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1153470222, now seen corresponding path program 1 times [2019-10-15 00:02:38,940 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:38,940 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571368373] [2019-10-15 00:02:38,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:38,941 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:38,941 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:39,041 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 29 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:39,041 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571368373] [2019-10-15 00:02:39,041 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:39,042 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:39,042 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107952644] [2019-10-15 00:02:39,042 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:39,043 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:39,043 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:39,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:39,043 INFO L87 Difference]: Start difference. First operand 1210 states and 1601 transitions. Second operand 4 states. [2019-10-15 00:02:40,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:40,859 INFO L93 Difference]: Finished difference Result 4528 states and 6206 transitions. [2019-10-15 00:02:40,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:40,860 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 130 [2019-10-15 00:02:40,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:40,888 INFO L225 Difference]: With dead ends: 4528 [2019-10-15 00:02:40,889 INFO L226 Difference]: Without dead ends: 3324 [2019-10-15 00:02:40,894 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:40,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3324 states. [2019-10-15 00:02:41,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3324 to 3303. [2019-10-15 00:02:41,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3303 states. [2019-10-15 00:02:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3303 states to 3303 states and 4304 transitions. [2019-10-15 00:02:41,032 INFO L78 Accepts]: Start accepts. Automaton has 3303 states and 4304 transitions. Word has length 130 [2019-10-15 00:02:41,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:41,034 INFO L462 AbstractCegarLoop]: Abstraction has 3303 states and 4304 transitions. [2019-10-15 00:02:41,035 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3303 states and 4304 transitions. [2019-10-15 00:02:41,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-15 00:02:41,041 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:41,041 INFO L380 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:41,041 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:41,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:41,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674653, now seen corresponding path program 1 times [2019-10-15 00:02:41,042 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:41,043 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903405766] [2019-10-15 00:02:41,043 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:41,043 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:41,043 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:41,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:41,379 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 61 proven. 0 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:02:41,380 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903405766] [2019-10-15 00:02:41,380 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:41,380 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:41,380 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392840065] [2019-10-15 00:02:41,381 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:41,381 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:41,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:41,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:41,382 INFO L87 Difference]: Start difference. First operand 3303 states and 4304 transitions. Second operand 3 states. [2019-10-15 00:02:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:42,562 INFO L93 Difference]: Finished difference Result 7934 states and 10720 transitions. [2019-10-15 00:02:42,563 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:42,563 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 232 [2019-10-15 00:02:42,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:42,592 INFO L225 Difference]: With dead ends: 7934 [2019-10-15 00:02:42,592 INFO L226 Difference]: Without dead ends: 4825 [2019-10-15 00:02:42,602 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 1 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:42,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4825 states. [2019-10-15 00:02:42,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4825 to 4635. [2019-10-15 00:02:42,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4635 states. [2019-10-15 00:02:42,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4635 states to 4635 states and 6137 transitions. [2019-10-15 00:02:42,789 INFO L78 Accepts]: Start accepts. Automaton has 4635 states and 6137 transitions. Word has length 232 [2019-10-15 00:02:42,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:42,791 INFO L462 AbstractCegarLoop]: Abstraction has 4635 states and 6137 transitions. [2019-10-15 00:02:42,792 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:42,792 INFO L276 IsEmpty]: Start isEmpty. Operand 4635 states and 6137 transitions. [2019-10-15 00:02:42,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 311 [2019-10-15 00:02:42,803 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:42,803 INFO L380 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 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, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:42,804 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:42,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:42,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1682198646, now seen corresponding path program 1 times [2019-10-15 00:02:42,805 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:42,805 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718510076] [2019-10-15 00:02:42,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:42,806 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:42,806 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:42,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 241 proven. 76 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2019-10-15 00:02:43,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718510076] [2019-10-15 00:02:43,128 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153247418] [2019-10-15 00:02:43,129 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:43,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:43,314 INFO L256 TraceCheckSpWp]: Trace formula consists of 552 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:02:43,350 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:43,600 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:02:43,601 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:43,835 INFO L134 CoverageAnalysis]: Checked inductivity of 323 backedges. 244 proven. 2 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2019-10-15 00:02:43,836 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [425840183] [2019-10-15 00:02:43,850 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 311 [2019-10-15 00:02:43,910 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:43,910 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)