/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -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/Problem01_label15.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-fb55353 [2019-11-06 22:29:07,536 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-06 22:29:07,538 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-06 22:29:07,550 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-06 22:29:07,559 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-06 22:29:07,560 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-06 22:29:07,561 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-06 22:29:07,562 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-06 22:29:07,563 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-06 22:29:07,564 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-06 22:29:07,565 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-06 22:29:07,567 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-06 22:29:07,569 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-06 22:29:07,570 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-06 22:29:07,571 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-06 22:29:07,572 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-06 22:29:07,576 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-06 22:29:07,586 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-06 22:29:07,589 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-06 22:29:07,592 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-06 22:29:07,593 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 [2019-11-06 22:29:07,616 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-06 22:29:07,616 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-06 22:29:07,618 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-11-06 22:29:07,618 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-11-06 22:29:07,618 INFO L138 SettingsManager]: * Use SBE=true [2019-11-06 22:29:07,618 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-06 22:29:07,619 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-06 22:29:07,619 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-06 22:29:07,619 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-06 22:29:07,619 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-06 22:29:07,620 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-06 22:29:07,620 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-06 22:29:07,620 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-06 22:29:07,621 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-06 22:29:07,621 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-06 22:29:07,621 INFO L138 SettingsManager]: * Use constant arrays=true [2019-11-06 22:29:07,622 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-06 22:29:07,622 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-06 22:29:07,622 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-11-06 22:29:07,622 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-06 22:29:07,622 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-06 22:29:07,623 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-06 22:29:07,623 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-06 22:29:07,623 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-06 22:29:07,623 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-06 22:29:07,624 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-11-06 22:29:07,624 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-06 22:29:07,624 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-06 22:29:07,624 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 [2019-11-06 22:29:07,918 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-06 22:29:07,939 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-06 22:29:07,942 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-06 22:29:07,943 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-06 22:29:07,944 INFO L275 PluginConnector]: CDTParser initialized [2019-11-06 22:29:07,944 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem01_label15.c [2019-11-06 22:29:08,012 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ccd562f/a601cd37c537497bbedc280dd2063435/FLAG7f848de5f [2019-11-06 22:29:08,599 INFO L306 CDTParser]: Found 1 translation units. [2019-11-06 22:29:08,602 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem01_label15.c [2019-11-06 22:29:08,614 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ccd562f/a601cd37c537497bbedc280dd2063435/FLAG7f848de5f [2019-11-06 22:29:08,882 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c0ccd562f/a601cd37c537497bbedc280dd2063435 [2019-11-06 22:29:08,892 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-06 22:29:08,893 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-11-06 22:29:08,894 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:08,895 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-06 22:29:08,898 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-06 22:29:08,899 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:08" (1/1) ... [2019-11-06 22:29:08,902 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@40d1ab0a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:08, skipping insertion in model container [2019-11-06 22:29:08,902 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 10:29:08" (1/1) ... [2019-11-06 22:29:08,909 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-11-06 22:29:08,965 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-11-06 22:29:09,456 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:09,468 INFO L188 MainTranslator]: Completed pre-run [2019-11-06 22:29:09,584 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-06 22:29:09,604 INFO L192 MainTranslator]: Completed translation [2019-11-06 22:29:09,605 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09 WrapperNode [2019-11-06 22:29:09,606 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-06 22:29:09,606 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-06 22:29:09,607 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-06 22:29:09,607 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-06 22:29:09,621 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2019-11-06 22:29:09,621 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2019-11-06 22:29:09,657 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2019-11-06 22:29:09,662 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2019-11-06 22:29:09,743 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2019-11-06 22:29:09,764 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2019-11-06 22:29:09,778 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (1/1) ... [2019-11-06 22:29:09,789 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-06 22:29:09,790 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-06 22:29:09,790 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-06 22:29:09,790 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-06 22:29:09,791 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (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 [2019-11-06 22:29:09,881 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-11-06 22:29:09,882 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-06 22:29:09,882 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-11-06 22:29:09,882 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-11-06 22:29:09,882 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-11-06 22:29:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-11-06 22:29:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-11-06 22:29:09,883 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-11-06 22:29:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-11-06 22:29:09,884 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-11-06 22:29:09,885 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-06 22:29:11,383 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-06 22:29:11,383 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-11-06 22:29:11,385 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:11 BoogieIcfgContainer [2019-11-06 22:29:11,391 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-06 22:29:11,392 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-06 22:29:11,392 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-06 22:29:11,397 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-06 22:29:11,397 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 10:29:08" (1/3) ... [2019-11-06 22:29:11,398 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5c2b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:11, skipping insertion in model container [2019-11-06 22:29:11,398 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 10:29:09" (2/3) ... [2019-11-06 22:29:11,399 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d5c2b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 10:29:11, skipping insertion in model container [2019-11-06 22:29:11,399 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 10:29:11" (3/3) ... [2019-11-06 22:29:11,401 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem01_label15.c [2019-11-06 22:29:11,411 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-06 22:29:11,421 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-06 22:29:11,433 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-06 22:29:11,470 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-06 22:29:11,470 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-06 22:29:11,471 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-06 22:29:11,471 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-06 22:29:11,472 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-06 22:29:11,472 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-06 22:29:11,472 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-06 22:29:11,472 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-06 22:29:11,506 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states. [2019-11-06 22:29:11,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2019-11-06 22:29:11,519 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:11,520 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:29:11,522 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:11,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash 78510191, now seen corresponding path program 1 times [2019-11-06 22:29:11,538 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:11,538 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365979190] [2019-11-06 22:29:11,539 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:11,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:11,934 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365979190] [2019-11-06 22:29:11,935 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:11,936 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:29:11,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165307350] [2019-11-06 22:29:11,942 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:29:11,944 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:11,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:29:11,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:29:11,962 INFO L87 Difference]: Start difference. First operand 207 states. Second operand 4 states. [2019-11-06 22:29:13,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:13,090 INFO L93 Difference]: Finished difference Result 547 states and 938 transitions. [2019-11-06 22:29:13,093 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-06 22:29:13,094 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 87 [2019-11-06 22:29:13,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:13,123 INFO L225 Difference]: With dead ends: 547 [2019-11-06 22:29:13,123 INFO L226 Difference]: Without dead ends: 278 [2019-11-06 22:29:13,139 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:29:13,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2019-11-06 22:29:13,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2019-11-06 22:29:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 278 states. [2019-11-06 22:29:13,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 412 transitions. [2019-11-06 22:29:13,248 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 412 transitions. Word has length 87 [2019-11-06 22:29:13,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:13,249 INFO L462 AbstractCegarLoop]: Abstraction has 278 states and 412 transitions. [2019-11-06 22:29:13,249 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:29:13,249 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 412 transitions. [2019-11-06 22:29:13,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2019-11-06 22:29:13,262 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:13,262 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:29:13,263 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:13,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:13,264 INFO L82 PathProgramCache]: Analyzing trace with hash -1666970376, now seen corresponding path program 1 times [2019-11-06 22:29:13,264 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:13,265 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409044424] [2019-11-06 22:29:13,265 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:13,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:13,430 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409044424] [2019-11-06 22:29:13,430 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:13,430 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-06 22:29:13,431 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28589345] [2019-11-06 22:29:13,437 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-06 22:29:13,437 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:13,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-06 22:29:13,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-11-06 22:29:13,438 INFO L87 Difference]: Start difference. First operand 278 states and 412 transitions. Second operand 6 states. [2019-11-06 22:29:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:14,175 INFO L93 Difference]: Finished difference Result 703 states and 1063 transitions. [2019-11-06 22:29:14,175 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-06 22:29:14,175 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 97 [2019-11-06 22:29:14,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:14,180 INFO L225 Difference]: With dead ends: 703 [2019-11-06 22:29:14,180 INFO L226 Difference]: Without dead ends: 431 [2019-11-06 22:29:14,181 INFO L630 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 [2019-11-06 22:29:14,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 431 states. [2019-11-06 22:29:14,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 431 to 417. [2019-11-06 22:29:14,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 417 states. [2019-11-06 22:29:14,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417 states to 417 states and 609 transitions. [2019-11-06 22:29:14,212 INFO L78 Accepts]: Start accepts. Automaton has 417 states and 609 transitions. Word has length 97 [2019-11-06 22:29:14,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:14,213 INFO L462 AbstractCegarLoop]: Abstraction has 417 states and 609 transitions. [2019-11-06 22:29:14,213 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-06 22:29:14,213 INFO L276 IsEmpty]: Start isEmpty. Operand 417 states and 609 transitions. [2019-11-06 22:29:14,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2019-11-06 22:29:14,217 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:14,217 INFO L410 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:29:14,217 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash -758839946, now seen corresponding path program 1 times [2019-11-06 22:29:14,218 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:14,218 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101721562] [2019-11-06 22:29:14,218 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:14,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:14,409 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101721562] [2019-11-06 22:29:14,409 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:14,410 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-06 22:29:14,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451867266] [2019-11-06 22:29:14,412 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-06 22:29:14,413 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:14,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-06 22:29:14,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-11-06 22:29:14,414 INFO L87 Difference]: Start difference. First operand 417 states and 609 transitions. Second operand 4 states. [2019-11-06 22:29:15,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:15,391 INFO L93 Difference]: Finished difference Result 1505 states and 2253 transitions. [2019-11-06 22:29:15,392 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-06 22:29:15,392 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 98 [2019-11-06 22:29:15,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:15,398 INFO L225 Difference]: With dead ends: 1505 [2019-11-06 22:29:15,399 INFO L226 Difference]: Without dead ends: 1094 [2019-11-06 22:29:15,400 INFO L630 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 [2019-11-06 22:29:15,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2019-11-06 22:29:15,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 959. [2019-11-06 22:29:15,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 959 states. [2019-11-06 22:29:15,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 959 states to 959 states and 1314 transitions. [2019-11-06 22:29:15,455 INFO L78 Accepts]: Start accepts. Automaton has 959 states and 1314 transitions. Word has length 98 [2019-11-06 22:29:15,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:15,455 INFO L462 AbstractCegarLoop]: Abstraction has 959 states and 1314 transitions. [2019-11-06 22:29:15,456 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-06 22:29:15,456 INFO L276 IsEmpty]: Start isEmpty. Operand 959 states and 1314 transitions. [2019-11-06 22:29:15,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2019-11-06 22:29:15,459 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:15,459 INFO L410 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, 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] [2019-11-06 22:29:15,460 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:15,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:15,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1710985768, now seen corresponding path program 1 times [2019-11-06 22:29:15,460 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:15,460 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859403687] [2019-11-06 22:29:15,461 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:15,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:15,659 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859403687] [2019-11-06 22:29:15,659 INFO L218 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-06 22:29:15,660 INFO L231 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-11-06 22:29:15,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670593377] [2019-11-06 22:29:15,661 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-06 22:29:15,662 INFO L141 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-11-06 22:29:15,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-06 22:29:15,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2019-11-06 22:29:15,662 INFO L87 Difference]: Start difference. First operand 959 states and 1314 transitions. Second operand 7 states. [2019-11-06 22:29:16,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-06 22:29:16,608 INFO L93 Difference]: Finished difference Result 1938 states and 2679 transitions. [2019-11-06 22:29:16,609 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-06 22:29:16,609 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 121 [2019-11-06 22:29:16,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-06 22:29:16,615 INFO L225 Difference]: With dead ends: 1938 [2019-11-06 22:29:16,615 INFO L226 Difference]: Without dead ends: 985 [2019-11-06 22:29:16,617 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2019-11-06 22:29:16,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2019-11-06 22:29:16,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 697. [2019-11-06 22:29:16,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 697 states. [2019-11-06 22:29:16,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 697 states to 697 states and 908 transitions. [2019-11-06 22:29:16,660 INFO L78 Accepts]: Start accepts. Automaton has 697 states and 908 transitions. Word has length 121 [2019-11-06 22:29:16,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-06 22:29:16,662 INFO L462 AbstractCegarLoop]: Abstraction has 697 states and 908 transitions. [2019-11-06 22:29:16,662 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-06 22:29:16,662 INFO L276 IsEmpty]: Start isEmpty. Operand 697 states and 908 transitions. [2019-11-06 22:29:16,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2019-11-06 22:29:16,664 INFO L402 BasicCegarLoop]: Found error trace [2019-11-06 22:29:16,664 INFO L410 BasicCegarLoop]: trace histogram [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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-06 22:29:16,664 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-06 22:29:16,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-06 22:29:16,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1073963665, now seen corresponding path program 1 times [2019-11-06 22:29:16,665 INFO L161 FreeRefinementEngine]: Executing refinement strategy TAIPAN [2019-11-06 22:29:16,665 INFO L337 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780236822] [2019-11-06 22:29:16,665 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-06 22:29:16,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:16,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780236822] [2019-11-06 22:29:16,833 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174610962] [2019-11-06 22:29:16,833 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 [2019-11-06 22:29:16,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-06 22:29:16,955 INFO L256 TraceCheckSpWp]: Trace formula consists of 418 conjuncts, 13 conjunts are in the unsatisfiable core [2019-11-06 22:29:16,966 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-11-06 22:29:17,069 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:17,069 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-11-06 22:29:17,299 WARN L191 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 39 [2019-11-06 22:29:17,356 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,357 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,358 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,359 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,362 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,363 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,364 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,365 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,368 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,370 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,371 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,372 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,373 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,374 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,377 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-06 22:29:17,537 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 48 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-06 22:29:17,538 INFO L337 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1011535175] [2019-11-06 22:29:17,545 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 133 [2019-11-06 22:29:17,604 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-11-06 22:29:17,605 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)