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/Problem10_label16.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:00:52,340 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:00:52,342 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:00:52,355 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-10-15 00:00:52,364 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:00:52,365 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:00:52,366 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:00:52,367 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:00:52,367 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:00:52,368 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:00:52,370 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:00:52,372 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:00:52,373 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:00:52,374 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:00:52,375 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:00:52,376 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:00:52,378 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:00:52,389 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:00:52,390 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:00:52,391 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:00:52,395 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 00:00:52,413 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:00:52,414 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:00:52,415 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:00:52,416 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:00:52,416 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:00:52,416 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:00:52,416 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:00:52,417 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:00:52,417 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:00:52,417 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:00:52,418 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:00:52,418 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:00:52,418 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:00:52,419 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:00:52,419 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:00:52,419 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:00:52,419 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:00:52,420 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:00:52,420 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:00:52,420 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:00:52,420 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:00:52,421 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:00:52,421 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:00:52,421 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:00:52,421 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:00:52,421 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:00:52,422 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:00:52,422 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:00:52,422 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 00:00:52,703 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:00:52,716 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:00:52,719 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:00:52,720 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:00:52,721 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:00:52,722 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label16.c [2019-10-15 00:00:52,785 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/736b80de4/61f0af9746174ba89bd37c0ffe6512a9/FLAGb424ea88e [2019-10-15 00:00:53,304 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:00:53,308 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label16.c [2019-10-15 00:00:53,323 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/736b80de4/61f0af9746174ba89bd37c0ffe6512a9/FLAGb424ea88e [2019-10-15 00:00:53,515 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/736b80de4/61f0af9746174ba89bd37c0ffe6512a9 [2019-10-15 00:00:53,523 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:00:53,524 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:00:53,525 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:53,525 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:00:53,528 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:00:53,529 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,532 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5372b4b9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:53, skipping insertion in model container [2019-10-15 00:00:53,532 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:00:53" (1/1) ... [2019-10-15 00:00:53,539 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:00:53,591 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:00:54,011 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:54,111 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:00:54,212 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:00:54,227 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:00:54,228 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54 WrapperNode [2019-10-15 00:00:54,228 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:00:54,229 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:00:54,229 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:00:54,229 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:00:54,241 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (1/1) ... [2019-10-15 00:00:54,241 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (1/1) ... [2019-10-15 00:00:54,259 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (1/1) ... [2019-10-15 00:00:54,260 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (1/1) ... [2019-10-15 00:00:54,303 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (1/1) ... [2019-10-15 00:00:54,319 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (1/1) ... [2019-10-15 00:00:54,324 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (1/1) ... [2019-10-15 00:00:54,332 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:00:54,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:00:54,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:00:54,335 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:00:54,336 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (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 00:00:54,424 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:00:54,425 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:00:54,425 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:00:54,425 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:00:54,425 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:00:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:00:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:00:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:00:54,427 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:00:54,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:00:54,428 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:00:55,678 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:00:55,681 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:00:55,683 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:55 BoogieIcfgContainer [2019-10-15 00:00:55,683 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:00:55,685 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:00:55,685 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:00:55,689 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:00:55,689 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:00:53" (1/3) ... [2019-10-15 00:00:55,691 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9adb755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:55, skipping insertion in model container [2019-10-15 00:00:55,691 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:00:54" (2/3) ... [2019-10-15 00:00:55,692 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@9adb755 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:00:55, skipping insertion in model container [2019-10-15 00:00:55,692 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:00:55" (3/3) ... [2019-10-15 00:00:55,700 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label16.c [2019-10-15 00:00:55,710 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:00:55,720 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:00:55,732 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:00:55,768 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:00:55,768 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:00:55,770 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:00:55,770 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:00:55,770 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:00:55,771 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:00:55,771 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:00:55,771 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:00:55,802 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:00:55,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2019-10-15 00:00:55,812 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:55,814 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] [2019-10-15 00:00:55,816 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:55,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:55,822 INFO L82 PathProgramCache]: Analyzing trace with hash -369766826, now seen corresponding path program 1 times [2019-10-15 00:00:55,831 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:55,832 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490165528] [2019-10-15 00:00:55,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:55,832 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:55,832 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:55,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:56,114 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 00:00:56,115 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490165528] [2019-10-15 00:00:56,116 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:56,117 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:00:56,118 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483358684] [2019-10-15 00:00:56,122 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:00:56,125 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:56,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:00:56,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:00:56,142 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 3 states. [2019-10-15 00:00:57,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:57,166 INFO L93 Difference]: Finished difference Result 571 states and 989 transitions. [2019-10-15 00:00:57,167 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:00:57,169 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 39 [2019-10-15 00:00:57,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:57,198 INFO L225 Difference]: With dead ends: 571 [2019-10-15 00:00:57,198 INFO L226 Difference]: Without dead ends: 294 [2019-10-15 00:00:57,210 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 00:00:57,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2019-10-15 00:00:57,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 294. [2019-10-15 00:00:57,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:00:57,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:00:57,324 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 39 [2019-10-15 00:00:57,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:57,324 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:00:57,325 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:00:57,326 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:00:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2019-10-15 00:00:57,337 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:57,338 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:57,338 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:57,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:57,340 INFO L82 PathProgramCache]: Analyzing trace with hash -986233207, now seen corresponding path program 1 times [2019-10-15 00:00:57,340 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:57,341 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92496405] [2019-10-15 00:00:57,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:57,341 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:57,341 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:57,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:57,622 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:57,622 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92496405] [2019-10-15 00:00:57,623 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:57,623 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:00:57,623 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512223652] [2019-10-15 00:00:57,625 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:00:57,625 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:00:57,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:00:57,626 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-10-15 00:00:58,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:00:58,729 INFO L93 Difference]: Finished difference Result 1154 states and 1790 transitions. [2019-10-15 00:00:58,729 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:00:58,730 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 158 [2019-10-15 00:00:58,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:00:58,736 INFO L225 Difference]: With dead ends: 1154 [2019-10-15 00:00:58,736 INFO L226 Difference]: Without dead ends: 866 [2019-10-15 00:00:58,738 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 00:00:58,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-10-15 00:00:58,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 723. [2019-10-15 00:00:58,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 723 states. [2019-10-15 00:00:58,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 1036 transitions. [2019-10-15 00:00:58,769 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 1036 transitions. Word has length 158 [2019-10-15 00:00:58,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:00:58,770 INFO L462 AbstractCegarLoop]: Abstraction has 723 states and 1036 transitions. [2019-10-15 00:00:58,771 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:00:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 1036 transitions. [2019-10-15 00:00:58,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2019-10-15 00:00:58,773 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:00:58,773 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:00:58,774 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:00:58,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:00:58,774 INFO L82 PathProgramCache]: Analyzing trace with hash -585229963, now seen corresponding path program 1 times [2019-10-15 00:00:58,774 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:00:58,775 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1210024494] [2019-10-15 00:00:58,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:58,775 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:00:58,775 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:00:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:00:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:00:59,007 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1210024494] [2019-10-15 00:00:59,007 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:00:59,007 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:00:59,008 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233930934] [2019-10-15 00:00:59,008 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:00:59,009 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:00:59,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:00:59,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:00:59,009 INFO L87 Difference]: Start difference. First operand 723 states and 1036 transitions. Second operand 5 states. [2019-10-15 00:01:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:00,167 INFO L93 Difference]: Finished difference Result 1899 states and 2739 transitions. [2019-10-15 00:01:00,168 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:01:00,168 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 164 [2019-10-15 00:01:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:00,175 INFO L225 Difference]: With dead ends: 1899 [2019-10-15 00:01:00,176 INFO L226 Difference]: Without dead ends: 1182 [2019-10-15 00:01:00,177 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-15 00:01:00,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1182 states. [2019-10-15 00:01:00,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1182 to 1172. [2019-10-15 00:01:00,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1172 states. [2019-10-15 00:01:00,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1172 states to 1172 states and 1604 transitions. [2019-10-15 00:01:00,221 INFO L78 Accepts]: Start accepts. Automaton has 1172 states and 1604 transitions. Word has length 164 [2019-10-15 00:01:00,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:00,221 INFO L462 AbstractCegarLoop]: Abstraction has 1172 states and 1604 transitions. [2019-10-15 00:01:00,222 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:00,222 INFO L276 IsEmpty]: Start isEmpty. Operand 1172 states and 1604 transitions. [2019-10-15 00:01:00,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2019-10-15 00:01:00,227 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:00,227 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:00,228 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:00,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:00,228 INFO L82 PathProgramCache]: Analyzing trace with hash 385637137, now seen corresponding path program 1 times [2019-10-15 00:01:00,229 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:00,229 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074761088] [2019-10-15 00:01:00,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:00,229 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:00,230 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:01:00,490 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074761088] [2019-10-15 00:01:00,491 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159345726] [2019-10-15 00:01:00,491 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 00:01:00,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:00,595 INFO L256 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:01:00,608 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 105 proven. 0 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2019-10-15 00:01:00,764 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 138 backedges. 64 proven. 70 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:01:00,883 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:01:00,883 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 11 [2019-10-15 00:01:00,883 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612382808] [2019-10-15 00:01:00,884 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:01:00,885 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:00,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:01:00,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2019-10-15 00:01:00,886 INFO L87 Difference]: Start difference. First operand 1172 states and 1604 transitions. Second operand 5 states. [2019-10-15 00:01:01,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:01,779 INFO L93 Difference]: Finished difference Result 2660 states and 3756 transitions. [2019-10-15 00:01:01,780 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:01:01,780 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 238 [2019-10-15 00:01:01,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:01,789 INFO L225 Difference]: With dead ends: 2660 [2019-10-15 00:01:01,789 INFO L226 Difference]: Without dead ends: 1494 [2019-10-15 00:01:01,792 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 485 GetRequests, 472 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2019-10-15 00:01:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1494 states. [2019-10-15 00:01:01,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1494 to 1339. [2019-10-15 00:01:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1339 states. [2019-10-15 00:01:01,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1339 states to 1339 states and 1805 transitions. [2019-10-15 00:01:01,838 INFO L78 Accepts]: Start accepts. Automaton has 1339 states and 1805 transitions. Word has length 238 [2019-10-15 00:01:01,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:01,839 INFO L462 AbstractCegarLoop]: Abstraction has 1339 states and 1805 transitions. [2019-10-15 00:01:01,839 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 1339 states and 1805 transitions. [2019-10-15 00:01:01,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2019-10-15 00:01:01,848 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:01,849 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, 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:02,053 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:02,054 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:02,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:02,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1331299086, now seen corresponding path program 1 times [2019-10-15 00:01:02,055 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:02,055 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069874684] [2019-10-15 00:01:02,055 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:02,056 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:02,056 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:02,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:02,285 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:02,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069874684] [2019-10-15 00:01:02,285 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425675618] [2019-10-15 00:01:02,286 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:02,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:02,369 INFO L256 TraceCheckSpWp]: Trace formula consists of 422 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:02,375 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:02,481 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:02,482 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:02,597 INFO L134 CoverageAnalysis]: Checked inductivity of 143 backedges. 141 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:02,597 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1825278727] [2019-10-15 00:01:02,602 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 244 [2019-10-15 00:01:02,670 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:02,670 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:01:14,527 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.