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_label23.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:03:16,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:03:16,355 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:03:16,371 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:03:16,381 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:03:16,382 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:03:16,382 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:03:16,384 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:03:16,384 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:03:16,385 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:03:16,387 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:03:16,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:03:16,390 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:03:16,391 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:03:16,392 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:03:16,393 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:03:16,395 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:03:16,403 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:03:16,404 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:03:16,405 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:03:16,406 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 00:03:16,421 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:03:16,421 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:03:16,422 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:03:16,422 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:03:16,423 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:03:16,423 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:03:16,423 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:03:16,423 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:03:16,424 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:03:16,424 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:03:16,424 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:03:16,424 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:03:16,424 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:03:16,425 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:03:16,425 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:03:16,425 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:03:16,425 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:03:16,425 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:03:16,426 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:03:16,426 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:03:16,426 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:03:16,426 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:03:16,426 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:03:16,427 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:03:16,427 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:03:16,427 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:03:16,427 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:03:16,427 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:03:16,428 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 00:03:16,699 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:03:16,713 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:03:16,716 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:03:16,717 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:03:16,718 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:03:16,718 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label23.c [2019-10-15 00:03:16,797 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c618c5b03/4642872413104054b912a5df9859454c/FLAG9ce29135c [2019-10-15 00:03:17,425 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:03:17,426 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label23.c [2019-10-15 00:03:17,456 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c618c5b03/4642872413104054b912a5df9859454c/FLAG9ce29135c [2019-10-15 00:03:17,668 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c618c5b03/4642872413104054b912a5df9859454c [2019-10-15 00:03:17,679 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:03:17,682 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:03:17,684 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:17,684 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:03:17,687 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:03:17,689 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:17" (1/1) ... [2019-10-15 00:03:17,691 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4e2a3789 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:17, skipping insertion in model container [2019-10-15 00:03:17,692 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:03:17" (1/1) ... [2019-10-15 00:03:17,699 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:03:17,769 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:03:18,435 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:18,445 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:03:18,624 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:03:18,649 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:03:18,649 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18 WrapperNode [2019-10-15 00:03:18,649 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:03:18,650 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:03:18,650 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:03:18,650 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:03:18,669 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,670 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,714 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,715 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,806 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,820 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,828 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (1/1) ... [2019-10-15 00:03:18,840 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:03:18,840 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:03:18,840 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:03:18,841 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:03:18,843 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (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 00:03:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:03:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:03:18,936 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:03:18,937 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:03:18,937 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:03:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:03:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:03:18,938 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:03:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:03:18,939 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:03:18,940 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:03:20,721 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:03:20,721 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:03:20,723 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:20 BoogieIcfgContainer [2019-10-15 00:03:20,723 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:03:20,724 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:03:20,725 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:03:20,728 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:03:20,728 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:03:17" (1/3) ... [2019-10-15 00:03:20,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be6edb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:20, skipping insertion in model container [2019-10-15 00:03:20,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:03:18" (2/3) ... [2019-10-15 00:03:20,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@be6edb5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:03:20, skipping insertion in model container [2019-10-15 00:03:20,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:03:20" (3/3) ... [2019-10-15 00:03:20,732 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label23.c [2019-10-15 00:03:20,742 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:03:20,751 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:03:20,763 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:03:20,793 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:03:20,794 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:03:20,794 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:03:20,794 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:03:20,795 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:03:20,795 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:03:20,795 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:03:20,795 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:03:20,822 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:03:20,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2019-10-15 00:03:20,833 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:20,834 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:03:20,836 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:20,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:20,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1552063366, now seen corresponding path program 1 times [2019-10-15 00:03:20,854 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:20,854 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954078010] [2019-10-15 00:03:20,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:20,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:20,855 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:21,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:21,316 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 00:03:21,317 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954078010] [2019-10-15 00:03:21,318 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:21,318 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:03:21,319 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698205570] [2019-10-15 00:03:21,324 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:03:21,326 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:21,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:03:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:21,344 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:03:22,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:22,760 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-15 00:03:22,764 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:03:22,766 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 71 [2019-10-15 00:03:22,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:22,794 INFO L225 Difference]: With dead ends: 779 [2019-10-15 00:03:22,794 INFO L226 Difference]: Without dead ends: 425 [2019-10-15 00:03:22,803 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:03:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-15 00:03:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-15 00:03:22,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-15 00:03:22,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 666 transitions. [2019-10-15 00:03:22,885 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 666 transitions. Word has length 71 [2019-10-15 00:03:22,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:22,886 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 666 transitions. [2019-10-15 00:03:22,886 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:03:22,886 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 666 transitions. [2019-10-15 00:03:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2019-10-15 00:03:22,894 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:22,894 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, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:22,895 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:22,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:22,897 INFO L82 PathProgramCache]: Analyzing trace with hash 1937579030, now seen corresponding path program 1 times [2019-10-15 00:03:22,897 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:22,897 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426572772] [2019-10-15 00:03:22,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:22,898 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:22,898 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:23,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:23,155 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426572772] [2019-10-15 00:03:23,155 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:23,155 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:03:23,156 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577190316] [2019-10-15 00:03:23,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:03:23,158 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:23,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:03:23,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:03:23,159 INFO L87 Difference]: Start difference. First operand 420 states and 666 transitions. Second operand 6 states. [2019-10-15 00:03:25,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:25,749 INFO L93 Difference]: Finished difference Result 1665 states and 2806 transitions. [2019-10-15 00:03:25,750 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-10-15 00:03:25,750 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 141 [2019-10-15 00:03:25,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:25,763 INFO L225 Difference]: With dead ends: 1665 [2019-10-15 00:03:25,763 INFO L226 Difference]: Without dead ends: 1251 [2019-10-15 00:03:25,766 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2019-10-15 00:03:25,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2019-10-15 00:03:25,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1217. [2019-10-15 00:03:25,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1217 states. [2019-10-15 00:03:25,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1217 states to 1217 states and 1739 transitions. [2019-10-15 00:03:25,847 INFO L78 Accepts]: Start accepts. Automaton has 1217 states and 1739 transitions. Word has length 141 [2019-10-15 00:03:25,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:25,848 INFO L462 AbstractCegarLoop]: Abstraction has 1217 states and 1739 transitions. [2019-10-15 00:03:25,848 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:03:25,848 INFO L276 IsEmpty]: Start isEmpty. Operand 1217 states and 1739 transitions. [2019-10-15 00:03:25,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2019-10-15 00:03:25,853 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:25,854 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, 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] [2019-10-15 00:03:25,854 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:25,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:25,854 INFO L82 PathProgramCache]: Analyzing trace with hash 1983928202, now seen corresponding path program 1 times [2019-10-15 00:03:25,855 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:25,855 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951210631] [2019-10-15 00:03:25,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:25,855 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:25,856 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:26,038 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 64 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:26,039 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951210631] [2019-10-15 00:03:26,039 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:03:26,040 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:03:26,040 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454807933] [2019-10-15 00:03:26,040 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:03:26,041 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:03:26,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:03:26,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:03:26,043 INFO L87 Difference]: Start difference. First operand 1217 states and 1739 transitions. Second operand 6 states. [2019-10-15 00:03:27,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:03:27,903 INFO L93 Difference]: Finished difference Result 3450 states and 5148 transitions. [2019-10-15 00:03:27,903 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:03:27,904 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 151 [2019-10-15 00:03:27,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:03:27,944 INFO L225 Difference]: With dead ends: 3450 [2019-10-15 00:03:27,944 INFO L226 Difference]: Without dead ends: 2239 [2019-10-15 00:03:27,948 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 00:03:27,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2239 states. [2019-10-15 00:03:28,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2239 to 2212. [2019-10-15 00:03:28,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2212 states. [2019-10-15 00:03:28,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2212 states to 2212 states and 3012 transitions. [2019-10-15 00:03:28,026 INFO L78 Accepts]: Start accepts. Automaton has 2212 states and 3012 transitions. Word has length 151 [2019-10-15 00:03:28,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:03:28,026 INFO L462 AbstractCegarLoop]: Abstraction has 2212 states and 3012 transitions. [2019-10-15 00:03:28,027 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:03:28,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2212 states and 3012 transitions. [2019-10-15 00:03:28,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2019-10-15 00:03:28,034 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:03:28,034 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, 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, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:03:28,035 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:03:28,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:28,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1698562555, now seen corresponding path program 1 times [2019-10-15 00:03:28,036 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:03:28,036 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107536632] [2019-10-15 00:03:28,036 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:28,037 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:03:28,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:03:28,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:28,291 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:28,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107536632] [2019-10-15 00:03:28,291 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924614550] [2019-10-15 00:03:28,292 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 00:03:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:03:28,411 INFO L256 TraceCheckSpWp]: Trace formula consists of 419 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:03:28,427 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:03:28,491 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:28,492 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:03:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 196 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:03:28,688 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [300314831] [2019-10-15 00:03:28,706 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 215 [2019-10-15 00:03:28,766 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:03:28,767 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:03:54,260 INFO L266 AbstractInterpreter]: Error location(s) were unreachable [2019-10-15 00:03:54,262 INFO L272 AbstractInterpreter]: Visited 78 different actions 78 times. Never merged. Never widened. Performed 205 root evaluator evaluations with a maximum evaluation depth of 16. Performed 205 inverse root evaluator evaluations with a maximum inverse evaluation depth of 16. Never found a fixpoint. Largest state had 28 variables. [2019-10-15 00:03:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:03:54,267 INFO L536 sIntCurrentIteration]: Generating AbsInt predicates