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_label27.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-13a467a-m [2019-10-15 00:01:04,450 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-15 00:01:04,452 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-15 00:01:04,467 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-15 00:01:04,467 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-15 00:01:04,468 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-15 00:01:04,469 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-15 00:01:04,471 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-15 00:01:04,473 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-15 00:01:04,474 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-15 00:01:04,475 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-15 00:01:04,476 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-15 00:01:04,477 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-15 00:01:04,478 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-15 00:01:04,479 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-15 00:01:04,480 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-15 00:01:04,481 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-15 00:01:04,482 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-15 00:01:04,483 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-15 00:01:04,486 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-15 00:01:04,490 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-15 00:01:04,491 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-15 00:01:04,494 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-15 00:01:04,495 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-15 00:01:04,500 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-10-15 00:01:04,517 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-15 00:01:04,519 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-15 00:01:04,521 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-15 00:01:04,523 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 00:01:04,544 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-15 00:01:04,544 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-15 00:01:04,547 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-15 00:01:04,547 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-15 00:01:04,547 INFO L138 SettingsManager]: * Use SBE=true [2019-10-15 00:01:04,548 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-15 00:01:04,548 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-15 00:01:04,548 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-15 00:01:04,548 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-15 00:01:04,548 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-15 00:01:04,549 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-15 00:01:04,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-15 00:01:04,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-15 00:01:04,551 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-15 00:01:04,551 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-15 00:01:04,551 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-15 00:01:04,551 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-15 00:01:04,551 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-15 00:01:04,552 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-15 00:01:04,552 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-15 00:01:04,552 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-15 00:01:04,552 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-15 00:01:04,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-15 00:01:04,553 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-15 00:01:04,553 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-15 00:01:04,553 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-15 00:01:04,553 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-15 00:01:04,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-15 00:01:04,554 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 00:01:04,871 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-15 00:01:04,885 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-15 00:01:04,888 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-15 00:01:04,890 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-15 00:01:04,891 INFO L275 PluginConnector]: CDTParser initialized [2019-10-15 00:01:04,891 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/eca-rers2012/Problem10_label27.c [2019-10-15 00:01:04,971 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/991f14886/6cb596c31a2041d48d0c4b83b0facdfa/FLAGf05d40bd5 [2019-10-15 00:01:05,523 INFO L306 CDTParser]: Found 1 translation units. [2019-10-15 00:01:05,523 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/eca-rers2012/Problem10_label27.c [2019-10-15 00:01:05,535 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/991f14886/6cb596c31a2041d48d0c4b83b0facdfa/FLAGf05d40bd5 [2019-10-15 00:01:05,779 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/991f14886/6cb596c31a2041d48d0c4b83b0facdfa [2019-10-15 00:01:05,789 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-15 00:01:05,790 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-15 00:01:05,791 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:05,791 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-15 00:01:05,795 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-15 00:01:05,796 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:05" (1/1) ... [2019-10-15 00:01:05,799 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@22642b50 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:05, skipping insertion in model container [2019-10-15 00:01:05,799 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.10 12:01:05" (1/1) ... [2019-10-15 00:01:05,807 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-15 00:01:05,863 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-15 00:01:06,333 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:06,343 INFO L188 MainTranslator]: Completed pre-run [2019-10-15 00:01:06,535 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-15 00:01:06,552 INFO L192 MainTranslator]: Completed translation [2019-10-15 00:01:06,552 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06 WrapperNode [2019-10-15 00:01:06,553 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-15 00:01:06,553 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-15 00:01:06,554 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-15 00:01:06,554 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-15 00:01:06,569 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,569 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,598 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,598 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,642 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,655 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,664 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (1/1) ... [2019-10-15 00:01:06,674 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-15 00:01:06,675 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-15 00:01:06,675 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-15 00:01:06,675 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-15 00:01:06,676 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (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 00:01:06,757 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-15 00:01:06,758 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-15 00:01:06,758 INFO L138 BoogieDeclarations]: Found implementation of procedure calculate_output [2019-10-15 00:01:06,758 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-15 00:01:06,758 INFO L130 BoogieDeclarations]: Found specification of procedure calculate_output [2019-10-15 00:01:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-15 00:01:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-15 00:01:06,759 INFO L130 BoogieDeclarations]: Found specification of procedure exit [2019-10-15 00:01:06,760 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-15 00:01:06,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-15 00:01:06,761 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-15 00:01:08,138 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-15 00:01:08,142 INFO L284 CfgBuilder]: Removed 1 assume(true) statements. [2019-10-15 00:01:08,144 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:08 BoogieIcfgContainer [2019-10-15 00:01:08,144 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-15 00:01:08,146 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-15 00:01:08,147 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-15 00:01:08,151 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-15 00:01:08,151 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.10 12:01:05" (1/3) ... [2019-10-15 00:01:08,152 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c3cfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:08, skipping insertion in model container [2019-10-15 00:01:08,152 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.10 12:01:06" (2/3) ... [2019-10-15 00:01:08,153 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44c3cfec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.10 12:01:08, skipping insertion in model container [2019-10-15 00:01:08,153 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.10 12:01:08" (3/3) ... [2019-10-15 00:01:08,162 INFO L109 eAbstractionObserver]: Analyzing ICFG Problem10_label27.c [2019-10-15 00:01:08,176 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-15 00:01:08,188 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-15 00:01:08,200 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-15 00:01:08,242 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-15 00:01:08,242 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-15 00:01:08,243 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-15 00:01:08,243 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-15 00:01:08,244 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-15 00:01:08,244 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-15 00:01:08,244 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-15 00:01:08,244 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-15 00:01:08,274 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states. [2019-10-15 00:01:08,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2019-10-15 00:01:08,288 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:08,289 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] [2019-10-15 00:01:08,291 INFO L410 AbstractCegarLoop]: === Iteration 1 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:08,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:08,298 INFO L82 PathProgramCache]: Analyzing trace with hash 215216599, now seen corresponding path program 1 times [2019-10-15 00:01:08,308 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:08,308 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146530504] [2019-10-15 00:01:08,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:08,309 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:08,309 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:08,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:08,725 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 00:01:08,726 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146530504] [2019-10-15 00:01:08,727 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:08,728 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-15 00:01:08,728 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1073619378] [2019-10-15 00:01:08,734 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:08,736 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:08,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:08,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:08,755 INFO L87 Difference]: Start difference. First operand 215 states. Second operand 4 states. [2019-10-15 00:01:10,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:10,276 INFO L93 Difference]: Finished difference Result 733 states and 1294 transitions. [2019-10-15 00:01:10,277 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:10,278 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 66 [2019-10-15 00:01:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:10,298 INFO L225 Difference]: With dead ends: 733 [2019-10-15 00:01:10,299 INFO L226 Difference]: Without dead ends: 437 [2019-10-15 00:01:10,307 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-15 00:01:10,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2019-10-15 00:01:10,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 294. [2019-10-15 00:01:10,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:01:10,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:01:10,388 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 66 [2019-10-15 00:01:10,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:10,389 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:01:10,389 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:10,389 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:01:10,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2019-10-15 00:01:10,395 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:10,395 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-15 00:01:10,395 INFO L410 AbstractCegarLoop]: === Iteration 2 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:10,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:10,396 INFO L82 PathProgramCache]: Analyzing trace with hash -51785766, now seen corresponding path program 1 times [2019-10-15 00:01:10,396 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:10,396 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156400219] [2019-10-15 00:01:10,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:10,397 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:10,397 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:10,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:10,658 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2019-10-15 00:01:10,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156400219] [2019-10-15 00:01:10,658 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387848783] [2019-10-15 00:01:10,659 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 00:01:10,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:10,754 INFO L256 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:10,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:10,860 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:10,861 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:10,917 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:10,917 INFO L223 tionRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-10-15 00:01:10,918 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [3, 3] imperfect sequences [4] total 6 [2019-10-15 00:01:10,918 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304868552] [2019-10-15 00:01:10,925 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-15 00:01:10,926 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:10,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-15 00:01:10,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:10,927 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 4 states. [2019-10-15 00:01:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:12,001 INFO L93 Difference]: Finished difference Result 868 states and 1349 transitions. [2019-10-15 00:01:12,002 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-15 00:01:12,002 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 136 [2019-10-15 00:01:12,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:12,011 INFO L225 Difference]: With dead ends: 868 [2019-10-15 00:01:12,011 INFO L226 Difference]: Without dead ends: 866 [2019-10-15 00:01:12,013 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 274 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:12,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2019-10-15 00:01:12,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 294. [2019-10-15 00:01:12,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 294 states. [2019-10-15 00:01:12,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 446 transitions. [2019-10-15 00:01:12,061 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 446 transitions. Word has length 136 [2019-10-15 00:01:12,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:12,062 INFO L462 AbstractCegarLoop]: Abstraction has 294 states and 446 transitions. [2019-10-15 00:01:12,062 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-15 00:01:12,062 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 446 transitions. [2019-10-15 00:01:12,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2019-10-15 00:01:12,066 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:12,066 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:12,270 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-15 00:01:12,271 INFO L410 AbstractCegarLoop]: === Iteration 3 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:12,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:12,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1642827225, now seen corresponding path program 1 times [2019-10-15 00:01:12,273 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:12,273 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703325907] [2019-10-15 00:01:12,273 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:12,274 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:12,274 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:12,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:12,541 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:12,541 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703325907] [2019-10-15 00:01:12,541 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:12,542 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-15 00:01:12,543 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971808980] [2019-10-15 00:01:12,545 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-15 00:01:12,546 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-15 00:01:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-15 00:01:12,555 INFO L87 Difference]: Start difference. First operand 294 states and 446 transitions. Second operand 5 states. [2019-10-15 00:01:13,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:13,566 INFO L93 Difference]: Finished difference Result 743 states and 1137 transitions. [2019-10-15 00:01:13,568 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-15 00:01:13,568 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 191 [2019-10-15 00:01:13,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:13,573 INFO L225 Difference]: With dead ends: 743 [2019-10-15 00:01:13,573 INFO L226 Difference]: Without dead ends: 455 [2019-10-15 00:01:13,574 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 00:01:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2019-10-15 00:01:13,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 447. [2019-10-15 00:01:13,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 447 states. [2019-10-15 00:01:13,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 639 transitions. [2019-10-15 00:01:13,616 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 639 transitions. Word has length 191 [2019-10-15 00:01:13,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:13,616 INFO L462 AbstractCegarLoop]: Abstraction has 447 states and 639 transitions. [2019-10-15 00:01:13,617 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-15 00:01:13,617 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 639 transitions. [2019-10-15 00:01:13,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2019-10-15 00:01:13,624 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:13,624 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 00:01:13,625 INFO L410 AbstractCegarLoop]: === Iteration 4 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:13,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:13,630 INFO L82 PathProgramCache]: Analyzing trace with hash 1426970602, now seen corresponding path program 1 times [2019-10-15 00:01:13,631 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:13,631 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042944679] [2019-10-15 00:01:13,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:13,631 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:13,632 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:13,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 59 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-15 00:01:13,936 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042944679] [2019-10-15 00:01:13,936 INFO L223 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-15 00:01:13,936 INFO L236 tionRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-10-15 00:01:13,937 INFO L342 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758208910] [2019-10-15 00:01:13,937 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-10-15 00:01:13,938 INFO L137 tionRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy TAIPAN [2019-10-15 00:01:13,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-10-15 00:01:13,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2019-10-15 00:01:13,938 INFO L87 Difference]: Start difference. First operand 447 states and 639 transitions. Second operand 6 states. [2019-10-15 00:01:14,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-15 00:01:14,824 INFO L93 Difference]: Finished difference Result 1206 states and 1783 transitions. [2019-10-15 00:01:14,824 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-10-15 00:01:14,824 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 192 [2019-10-15 00:01:14,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-15 00:01:14,830 INFO L225 Difference]: With dead ends: 1206 [2019-10-15 00:01:14,831 INFO L226 Difference]: Without dead ends: 765 [2019-10-15 00:01:14,833 INFO L600 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2019-10-15 00:01:14,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2019-10-15 00:01:14,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 749. [2019-10-15 00:01:14,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 749 states. [2019-10-15 00:01:14,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 749 states to 749 states and 1042 transitions. [2019-10-15 00:01:14,883 INFO L78 Accepts]: Start accepts. Automaton has 749 states and 1042 transitions. Word has length 192 [2019-10-15 00:01:14,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-15 00:01:14,884 INFO L462 AbstractCegarLoop]: Abstraction has 749 states and 1042 transitions. [2019-10-15 00:01:14,884 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-10-15 00:01:14,884 INFO L276 IsEmpty]: Start isEmpty. Operand 749 states and 1042 transitions. [2019-10-15 00:01:14,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 271 [2019-10-15 00:01:14,890 INFO L372 BasicCegarLoop]: Found error trace [2019-10-15 00:01:14,890 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, 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 00:01:14,891 INFO L410 AbstractCegarLoop]: === Iteration 5 === [calculate_outputErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-15 00:01:14,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-15 00:01:14,891 INFO L82 PathProgramCache]: Analyzing trace with hash 699242395, now seen corresponding path program 1 times [2019-10-15 00:01:14,892 INFO L157 tionRefinementEngine]: Executing refinement strategy TAIPAN [2019-10-15 00:01:14,892 INFO L342 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271307983] [2019-10-15 00:01:14,892 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:14,894 INFO L116 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-15 00:01:14,894 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-15 00:01:14,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:15,222 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 00:01:15,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271307983] [2019-10-15 00:01:15,223 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817422220] [2019-10-15 00:01:15,223 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 00:01:15,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-15 00:01:15,334 INFO L256 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 4 conjunts are in the unsatisfiable core [2019-10-15 00:01:15,356 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-15 00:01:15,480 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 00:01:15,481 INFO L321 TraceCheckSpWp]: Computing backward predicates... [2019-10-15 00:01:15,622 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 00:01:15,623 INFO L342 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleAbstractInterpretation [2109695582] [2019-10-15 00:01:15,629 INFO L211 CegarAbsIntRunner]: Running AI on error trace of length 271 [2019-10-15 00:01:15,690 INFO L148 AbstractInterpreter]: Using domain IntervalDomain [2019-10-15 00:01:15,691 INFO L101 FixpointEngine]: Starting fixpoint engine with domain IntervalDomain (maxUnwinding=3, maxParallelStates=2) [2019-10-15 00:01:27,892 WARN L79 EvaluatorLogger]: Possible loss of precision. Operator ARITHMOD has no precise implementation.