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_label01.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:02:27,515 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:02:27,518 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:02:27,530 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:02:27,530 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:02:27,531 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:02:27,532 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:02:27,534 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:02:27,535 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:02:27,536 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:02:27,537 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:02:27,538 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:02:27,539 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:02:27,539 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:02:27,540 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:02:27,541 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:02:27,542 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:02:27,543 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:02:27,545 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:02:27,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:02:27,548 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:02:27,549 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:02:27,550 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:02:27,550 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:02:27,552 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:02:27,563 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:02:27,564 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:02:27,564 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:02:27,568 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-15 00:02:27,589 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:02:27,589 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:02:27,591 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:02:27,591 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:02:27,592 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:02:27,592 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:02:27,592 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:02:27,592 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:02:27,592 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:02:27,593 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:02:27,594 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:02:27,594 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:02:27,594 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:02:27,594 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:02:27,595 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:02:27,595 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:02:27,595 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:02:27,595 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:02:27,595 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:02:27,596 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:02:27,596 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:02:27,596 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:27,596 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:02:27,597 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:02:27,597 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:02:27,597 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:02:27,597 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:02:27,597 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:02:27,598 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.analysis.abstractinterpretationv2: Abstract domain -> IntervalDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Abstract interpretation Mode -> USE_PREDICATES [2019-10-15 00:02:27,868 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:02:27,882 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:02:27,885 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:02:27,887 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:02:27,887 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:02:27,888 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem11_label01.c [2019-10-15 00:02:27,947 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c2d9f8a3/c81fe2f764ab40b5b9c7bf5b81ece116/FLAGeedcb760f [2019-10-15 00:02:28,562 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:02:28,563 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem11_label01.c [2019-10-15 00:02:28,583 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c2d9f8a3/c81fe2f764ab40b5b9c7bf5b81ece116/FLAGeedcb760f [2019-10-15 00:02:28,774 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1c2d9f8a3/c81fe2f764ab40b5b9c7bf5b81ece116 [2019-10-15 00:02:28,785 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:02:28,787 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:02:28,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:28,792 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:02:28,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:02:28,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@36edca5e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:28, skipping insertion in model container [2019-10-15 00:02:28,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:02:28" (1/1) ... [2019-10-15 00:02:28,807 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:02:28,875 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:02:29,537 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:29,553 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:02:29,822 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:02:29,843 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:02:29,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29 WrapperNode [2019-10-15 00:02:29,844 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:02:29,845 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:02:29,845 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:02:29,845 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:02:29,860 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (1/1) ... [2019-10-15 00:02:29,861 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (1/1) ... [2019-10-15 00:02:29,902 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (1/1) ... [2019-10-15 00:02:29,902 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (1/1) ... [2019-10-15 00:02:29,974 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (1/1) ... [2019-10-15 00:02:29,999 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (1/1) ... [2019-10-15 00:02:30,015 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (1/1) ... [2019-10-15 00:02:30,028 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:02:30,029 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:02:30,029 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:02:30,029 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:02:30,030 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:02:30,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:02:30,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:02:30,096 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:02:30,097 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:02:30,097 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:02:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:02:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:02:30,098 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:02:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:02:30,099 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:02:30,100 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:02:31,856 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:02:31,856 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:02:31,863 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:31 BoogieIcfgContainer [2019-10-15 00:02:31,864 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:02:31,865 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:02:31,865 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:02:31,871 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:02:31,872 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:02:28" (1/3) ... [2019-10-15 00:02:31,872 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7913078c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:31, skipping insertion in model container [2019-10-15 00:02:31,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:02:29" (2/3) ... [2019-10-15 00:02:31,873 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7913078c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:02:31, skipping insertion in model container [2019-10-15 00:02:31,873 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:02:31" (3/3) ... [2019-10-15 00:02:31,878 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem11_label01.c [2019-10-15 00:02:31,889 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:02:31,901 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:02:31,912 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:02:31,952 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:02:31,952 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:02:31,954 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:02:31,954 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:02:31,954 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:02:31,955 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:02:31,955 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:02:31,955 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:02:32,008 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states. [2019-10-15 00:02:32,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2019-10-15 00:02:32,017 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:32,018 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] [2019-10-15 00:02:32,019 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:32,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:32,024 INFO L82 PathProgramCache]: Analyzing trace with hash 155474906, now seen corresponding path program 1 times [2019-10-15 00:02:32,031 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:32,031 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983337499] [2019-10-15 00:02:32,031 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:32,032 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:32,032 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:32,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:32,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:32,394 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983337499] [2019-10-15 00:02:32,396 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:32,396 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-15 00:02:32,396 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621902385] [2019-10-15 00:02:32,402 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-15 00:02:32,404 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:32,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-15 00:02:32,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-15 00:02:32,425 INFO L87 Difference]: Start difference. First operand 292 states. Second operand 3 states. [2019-10-15 00:02:33,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:33,890 INFO L93 Difference]: Finished difference Result 779 states and 1369 transitions. [2019-10-15 00:02:33,890 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-15 00:02:33,892 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 63 [2019-10-15 00:02:33,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:33,910 INFO L225 Difference]: With dead ends: 779 [2019-10-15 00:02:33,910 INFO L226 Difference]: Without dead ends: 425 [2019-10-15 00:02:33,919 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 00:02:33,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2019-10-15 00:02:33,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 420. [2019-10-15 00:02:33,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 420 states. [2019-10-15 00:02:33,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 672 transitions. [2019-10-15 00:02:33,996 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 672 transitions. Word has length 63 [2019-10-15 00:02:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:33,997 INFO L462 AbstractCegarLoop]: Abstraction has 420 states and 672 transitions. [2019-10-15 00:02:33,997 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-15 00:02:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 672 transitions. [2019-10-15 00:02:34,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2019-10-15 00:02:34,005 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:34,005 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:34,005 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:34,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:34,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1591482302, now seen corresponding path program 1 times [2019-10-15 00:02:34,006 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:34,006 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033854804] [2019-10-15 00:02:34,006 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:34,007 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:34,007 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:34,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:34,361 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:34,362 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033854804] [2019-10-15 00:02:34,362 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:34,362 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:02:34,362 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036543475] [2019-10-15 00:02:34,364 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:02:34,365 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:34,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:02:34,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:34,365 INFO L87 Difference]: Start difference. First operand 420 states and 672 transitions. Second operand 4 states. [2019-10-15 00:02:36,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:36,595 INFO L93 Difference]: Finished difference Result 1606 states and 2628 transitions. [2019-10-15 00:02:36,598 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:02:36,598 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 137 [2019-10-15 00:02:36,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:36,608 INFO L225 Difference]: With dead ends: 1606 [2019-10-15 00:02:36,608 INFO L226 Difference]: Without dead ends: 1192 [2019-10-15 00:02:36,610 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:02:36,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1192 states. [2019-10-15 00:02:36,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1192 to 1182. [2019-10-15 00:02:36,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1182 states. [2019-10-15 00:02:36,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 1860 transitions. [2019-10-15 00:02:36,684 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 1860 transitions. Word has length 137 [2019-10-15 00:02:36,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:36,685 INFO L462 AbstractCegarLoop]: Abstraction has 1182 states and 1860 transitions. [2019-10-15 00:02:36,686 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:02:36,686 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 1860 transitions. [2019-10-15 00:02:36,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2019-10-15 00:02:36,697 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:36,698 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, 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] [2019-10-15 00:02:36,698 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:36,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:36,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1307021109, now seen corresponding path program 1 times [2019-10-15 00:02:36,699 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:36,699 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413650153] [2019-10-15 00:02:36,699 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:36,700 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:36,700 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:36,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:36,980 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 112 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:36,980 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413650153] [2019-10-15 00:02:36,981 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954327131] [2019-10-15 00:02:36,982 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:37,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:37,093 INFO L256 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 6 conjunts are in the unsatisfiable core [2019-10-15 00:02:37,106 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:37,238 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 133 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2019-10-15 00:02:37,239 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:37,368 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 112 proven. 74 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2019-10-15 00:02:37,369 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 2 imperfect interpolant sequences. [2019-10-15 00:02:37,369 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 12 [2019-10-15 00:02:37,370 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952324418] [2019-10-15 00:02:37,371 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:02:37,371 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:37,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:02:37,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2019-10-15 00:02:37,372 INFO L87 Difference]: Start difference. First operand 1182 states and 1860 transitions. Second operand 5 states. [2019-10-15 00:02:39,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:39,160 INFO L93 Difference]: Finished difference Result 2968 states and 4784 transitions. [2019-10-15 00:02:39,160 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2019-10-15 00:02:39,161 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 226 [2019-10-15 00:02:39,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:39,174 INFO L225 Difference]: With dead ends: 2968 [2019-10-15 00:02:39,175 INFO L226 Difference]: Without dead ends: 1792 [2019-10-15 00:02:39,179 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 448 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2019-10-15 00:02:39,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1792 states. [2019-10-15 00:02:39,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1792 to 1767. [2019-10-15 00:02:39,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 1767 states. [2019-10-15 00:02:39,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 2729 transitions. [2019-10-15 00:02:39,292 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 2729 transitions. Word has length 226 [2019-10-15 00:02:39,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:39,292 INFO L462 AbstractCegarLoop]: Abstraction has 1767 states and 2729 transitions. [2019-10-15 00:02:39,292 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:02:39,293 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 2729 transitions. [2019-10-15 00:02:39,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2019-10-15 00:02:39,299 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:39,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:02:39,504 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:02:39,504 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:39,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:39,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2104432712, now seen corresponding path program 1 times [2019-10-15 00:02:39,505 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:39,505 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192607182] [2019-10-15 00:02:39,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:39,505 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:39,505 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:39,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 56 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:39,757 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192607182] [2019-10-15 00:02:39,757 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:02:39,758 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:02:39,758 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165347997] [2019-10-15 00:02:39,759 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:02:39,760 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:02:39,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:02:39,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:02:39,760 INFO L87 Difference]: Start difference. First operand 1767 states and 2729 transitions. Second operand 6 states. [2019-10-15 00:02:41,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:02:41,705 INFO L93 Difference]: Finished difference Result 4762 states and 7716 transitions. [2019-10-15 00:02:41,705 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:02:41,706 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 232 [2019-10-15 00:02:41,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:02:41,728 INFO L225 Difference]: With dead ends: 4762 [2019-10-15 00:02:41,728 INFO L226 Difference]: Without dead ends: 3001 [2019-10-15 00:02:41,735 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 00:02:41,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3001 states. [2019-10-15 00:02:41,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3001 to 2196. [2019-10-15 00:02:41,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2196 states. [2019-10-15 00:02:41,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 3362 transitions. [2019-10-15 00:02:41,842 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 3362 transitions. Word has length 232 [2019-10-15 00:02:41,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:02:41,843 INFO L462 AbstractCegarLoop]: Abstraction has 2196 states and 3362 transitions. [2019-10-15 00:02:41,843 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:02:41,843 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 3362 transitions. [2019-10-15 00:02:41,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2019-10-15 00:02:41,850 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:02:41,850 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, 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] [2019-10-15 00:02:41,850 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:02:41,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:02:41,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1496622101, now seen corresponding path program 1 times [2019-10-15 00:02:41,851 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:02:41,851 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881199519] [2019-10-15 00:02:41,851 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:41,852 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:02:41,852 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:02:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:42,077 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:42,080 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881199519] [2019-10-15 00:02:42,081 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234873218] [2019-10-15 00:02:42,081 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 00:02:42,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:02:42,225 INFO L256 TraceCheckSpWp]: Trace formula consists of 441 conjuncts, 7 conjunts are in the unsatisfiable core [2019-10-15 00:02:42,241 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:02:42,391 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:42,391 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:02:42,503 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 195 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:02:42,503 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [1516031056] [2019-10-15 00:02:42,512 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 243 [2019-10-15 00:02:42,567 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:02:42,567 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2)