/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf -i ../../../trunk/examples/svcomp/loops/linear_sea.ch.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:26:12,240 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:26:12,242 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:26:12,254 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:26:12,263 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:26:12,265 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:26:12,266 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:26:12,267 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:26:12,267 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:26:12,268 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:26:12,270 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:26:12,272 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:26:12,274 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:26:12,275 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:26:12,276 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:26:12,277 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:26:12,279 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:26:12,286 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-11-24 04:26:12,287 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-11-24 04:26:12,288 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-11-24 04:26:12,289 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/taipan/svcomp-Reach-32bit-Taipan_Default.epf [2019-11-24 04:26:12,304 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:26:12,304 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:26:12,305 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:26:12,305 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:26:12,305 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:26:12,305 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:26:12,306 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:26:12,306 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:26:12,306 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:26:12,306 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:26:12,306 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:26:12,306 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:26:12,307 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:26:12,307 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:26:12,307 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:26:12,308 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:26:12,308 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:26:12,308 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:26:12,308 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:26:12,308 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:26:12,309 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:26:12,309 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:26:12,309 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:26:12,309 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:26:12,309 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:26:12,310 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:26:12,310 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:26:12,310 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:26:12,310 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:26:12,310 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:26:12,311 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:26:12,311 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:26:12,311 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:26:12,311 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:26:12,311 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:26:12,312 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:26:12,312 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:26:12,312 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:26:12,597 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:26:12,617 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:26:12,620 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:26:12,621 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:26:12,622 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:26:12,622 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/linear_sea.ch.c [2019-11-24 04:26:12,691 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730ba7297/b8616f2028a14fd38e3bf23bd1a94c84/FLAG59e90b8fb [2019-11-24 04:26:13,138 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:26:13,139 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/linear_sea.ch.c [2019-11-24 04:26:13,145 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730ba7297/b8616f2028a14fd38e3bf23bd1a94c84/FLAG59e90b8fb [2019-11-24 04:26:13,568 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/730ba7297/b8616f2028a14fd38e3bf23bd1a94c84 [2019-11-24 04:26:13,578 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:26:13,579 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:26:13,580 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:26:13,581 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:26:13,584 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:26:13,585 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,588 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@485f49d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13, skipping insertion in model container [2019-11-24 04:26:13,588 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,596 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:26:13,615 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:26:13,799 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:26:13,809 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:26:13,828 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:26:13,843 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:26:13,843 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13 WrapperNode [2019-11-24 04:26:13,843 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:26:13,844 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:26:13,844 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:26:13,845 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:26:13,852 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,933 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,961 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:26:13,967 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:26:13,967 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:26:13,967 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:26:13,976 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,977 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,979 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,979 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,984 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,988 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,989 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... [2019-11-24 04:26:13,992 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:26:13,992 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:26:13,992 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:26:13,992 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:26:13,993 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:26:14,056 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2019-11-24 04:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2019-11-24 04:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:26:14,057 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:26:14,057 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2019-11-24 04:26:14,343 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:26:14,343 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 04:26:14,344 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:26:14 BoogieIcfgContainer [2019-11-24 04:26:14,344 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:26:14,345 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:26:14,345 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:26:14,348 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:26:14,349 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:26:13" (1/3) ... [2019-11-24 04:26:14,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c367c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:26:14, skipping insertion in model container [2019-11-24 04:26:14,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:26:13" (2/3) ... [2019-11-24 04:26:14,350 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75c367c8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:26:14, skipping insertion in model container [2019-11-24 04:26:14,350 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:26:14" (3/3) ... [2019-11-24 04:26:14,352 INFO L109 eAbstractionObserver]: Analyzing ICFG linear_sea.ch.c [2019-11-24 04:26:14,362 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:26:14,384 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:26:14,414 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:26:14,447 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:26:14,447 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:26:14,447 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:26:14,447 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:26:14,447 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:26:14,448 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:26:14,448 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:26:14,448 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:26:14,462 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states. [2019-11-24 04:26:14,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:26:14,470 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:14,471 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:26:14,471 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:14,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:14,477 INFO L82 PathProgramCache]: Analyzing trace with hash -2027909546, now seen corresponding path program 1 times [2019-11-24 04:26:14,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:14,486 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067401732] [2019-11-24 04:26:14,486 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:14,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:14,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:14,640 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067401732] [2019-11-24 04:26:14,641 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:26:14,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:26:14,642 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332801217] [2019-11-24 04:26:14,646 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:26:14,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:26:14,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:26:14,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:26:14,659 INFO L87 Difference]: Start difference. First operand 11 states. Second operand 2 states. [2019-11-24 04:26:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:26:14,676 INFO L93 Difference]: Finished difference Result 18 states and 21 transitions. [2019-11-24 04:26:14,677 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:26:14,678 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 6 [2019-11-24 04:26:14,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:26:14,688 INFO L225 Difference]: With dead ends: 18 [2019-11-24 04:26:14,688 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 04:26:14,691 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:26:14,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 04:26:14,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-24 04:26:14,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 04:26:14,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2019-11-24 04:26:14,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 6 [2019-11-24 04:26:14,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:26:14,726 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2019-11-24 04:26:14,727 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:26:14,727 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2019-11-24 04:26:14,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:26:14,728 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:14,728 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:26:14,728 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:14,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:14,729 INFO L82 PathProgramCache]: Analyzing trace with hash 1584177441, now seen corresponding path program 1 times [2019-11-24 04:26:14,729 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:14,729 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778902700] [2019-11-24 04:26:14,730 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:14,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:14,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:14,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778902700] [2019-11-24 04:26:14,937 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:26:14,937 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:26:14,937 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620162447] [2019-11-24 04:26:14,939 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:26:14,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:26:14,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:26:14,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:26:14,942 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand 4 states. [2019-11-24 04:26:15,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:26:15,005 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-24 04:26:15,006 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-11-24 04:26:15,006 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 7 [2019-11-24 04:26:15,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:26:15,007 INFO L225 Difference]: With dead ends: 14 [2019-11-24 04:26:15,007 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:26:15,008 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 1 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:26:15,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:26:15,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2019-11-24 04:26:15,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2019-11-24 04:26:15,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2019-11-24 04:26:15,013 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 7 [2019-11-24 04:26:15,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:26:15,014 INFO L462 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2019-11-24 04:26:15,014 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:26:15,014 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2019-11-24 04:26:15,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:26:15,015 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:15,016 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:26:15,016 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:15,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:15,017 INFO L82 PathProgramCache]: Analyzing trace with hash 2031079839, now seen corresponding path program 1 times [2019-11-24 04:26:15,017 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:15,018 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055776765] [2019-11-24 04:26:15,018 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:15,264 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:15,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055776765] [2019-11-24 04:26:15,267 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237972939] [2019-11-24 04:26:15,267 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:26:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:15,320 INFO L255 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 14 conjunts are in the unsatisfiable core [2019-11-24 04:26:15,325 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:26:15,369 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:26:15,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:15,382 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:26:15,436 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:15,438 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [999903743] [2019-11-24 04:26:15,463 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:26:15,463 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:26:15,470 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:26:15,479 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:26:15,482 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:26:15,547 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:17,596 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= 0 (select |#valid| 0)) [2019-11-24 04:26:17,783 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:17,811 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:17,832 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:17,939 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:17,958 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:17,979 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:17,997 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,029 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,062 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,084 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,110 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,160 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,185 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,209 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,230 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,247 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,264 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,287 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,304 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,318 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:18,609 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:26:18,751 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:26:18,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:26:18,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2019-11-24 04:26:18,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970580236] [2019-11-24 04:26:18,752 INFO L442 AbstractCegarLoop]: Interpolant automaton has 9 states [2019-11-24 04:26:18,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:26:18,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2019-11-24 04:26:18,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:26:18,754 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand 9 states. [2019-11-24 04:26:18,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:26:18,860 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2019-11-24 04:26:18,860 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:26:18,860 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2019-11-24 04:26:18,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:26:18,861 INFO L225 Difference]: With dead ends: 16 [2019-11-24 04:26:18,861 INFO L226 Difference]: Without dead ends: 12 [2019-11-24 04:26:18,862 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2019-11-24 04:26:18,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2019-11-24 04:26:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2019-11-24 04:26:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2019-11-24 04:26:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2019-11-24 04:26:18,865 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2019-11-24 04:26:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:26:18,865 INFO L462 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2019-11-24 04:26:18,866 INFO L463 AbstractCegarLoop]: Interpolant automaton has 9 states. [2019-11-24 04:26:18,866 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2019-11-24 04:26:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2019-11-24 04:26:18,866 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:26:18,866 INFO L410 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:26:19,075 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:26:19,076 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:26:19,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:26:19,076 INFO L82 PathProgramCache]: Analyzing trace with hash 2007554717, now seen corresponding path program 2 times [2019-11-24 04:26:19,077 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:26:19,077 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478628452] [2019-11-24 04:26:19,077 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:26:19,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:26:19,508 WARN L192 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 101 DAG size of output: 43 [2019-11-24 04:26:29,939 WARN L192 SmtUtils]: Spent 10.40 s on a formula simplification. DAG size of input: 163 DAG size of output: 57 [2019-11-24 04:26:30,164 WARN L192 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 122 DAG size of output: 34 [2019-11-24 04:26:30,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:30,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478628452] [2019-11-24 04:26:30,445 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461643321] [2019-11-24 04:26:30,445 INFO L92 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 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 [2019-11-24 04:26:30,542 INFO L249 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2019-11-24 04:26:30,542 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:26:30,544 WARN L253 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 46 conjunts are in the unsatisfiable core [2019-11-24 04:26:30,546 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:26:30,585 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:30,593 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:30,602 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:30,610 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:26:36,825 WARN L192 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 68 DAG size of output: 39 [2019-11-24 04:26:38,617 WARN L192 SmtUtils]: Spent 1.70 s on a formula simplification that was a NOOP. DAG size: 41 [2019-11-24 04:26:46,585 WARN L192 SmtUtils]: Spent 7.89 s on a formula simplification. DAG size of input: 67 DAG size of output: 47 [2019-11-24 04:26:48,011 WARN L192 SmtUtils]: Spent 1.39 s on a formula simplification that was a NOOP. DAG size: 44 [2019-11-24 04:26:48,351 WARN L192 SmtUtils]: Spent 301.00 ms on a formula simplification. DAG size of input: 96 DAG size of output: 53 [2019-11-24 04:26:48,641 WARN L192 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 45 [2019-11-24 04:26:48,833 WARN L192 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-11-24 04:26:57,581 WARN L192 SmtUtils]: Spent 8.70 s on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2019-11-24 04:26:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:26:57,643 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:00,517 WARN L192 SmtUtils]: Spent 2.57 s on a formula simplification that was a NOOP. DAG size: 49 [2019-11-24 04:27:00,529 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:00,530 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1635309002] [2019-11-24 04:27:00,531 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2019-11-24 04:27:00,531 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:27:00,532 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:27:00,532 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:27:00,532 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:27:02,589 WARN L176 IndexEqualityManager]: solver failed to check if following not equals relation is implied: (= 0 (select |#valid| 0)) [2019-11-24 04:27:02,605 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,655 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,666 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,703 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,715 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,726 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,744 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,757 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,769 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,807 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,820 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:02,924 INFO L180 IcfgInterpreter]: Interpretation finished [2019-11-24 04:27:03,157 INFO L343 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: Unknown [2019-11-24 04:27:03,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 3 imperfect interpolant sequences. [2019-11-24 04:27:03,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2019-11-24 04:27:03,158 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384799049] [2019-11-24 04:27:03,158 INFO L442 AbstractCegarLoop]: Interpolant automaton has 19 states [2019-11-24 04:27:03,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:27:03,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2019-11-24 04:27:03,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2019-11-24 04:27:03,160 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand 19 states. [2019-11-24 04:27:05,807 WARN L192 SmtUtils]: Spent 2.26 s on a formula simplification. DAG size of input: 81 DAG size of output: 53 [2019-11-24 04:27:06,878 WARN L192 SmtUtils]: Spent 821.00 ms on a formula simplification. DAG size of input: 102 DAG size of output: 53 [2019-11-24 04:27:07,382 WARN L192 SmtUtils]: Spent 432.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 66 [2019-11-24 04:27:08,353 WARN L192 SmtUtils]: Spent 800.00 ms on a formula simplification. DAG size of input: 104 DAG size of output: 55 [2019-11-24 04:27:08,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:27:08,623 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2019-11-24 04:27:08,623 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2019-11-24 04:27:08,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 11 [2019-11-24 04:27:08,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:27:08,624 INFO L225 Difference]: With dead ends: 26 [2019-11-24 04:27:08,624 INFO L226 Difference]: Without dead ends: 18 [2019-11-24 04:27:08,625 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 38.9s TimeCoverageRelationStatistics Valid=182, Invalid=688, Unknown=0, NotChecked=0, Total=870 [2019-11-24 04:27:08,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2019-11-24 04:27:08,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2019-11-24 04:27:08,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2019-11-24 04:27:08,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2019-11-24 04:27:08,630 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 11 [2019-11-24 04:27:08,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:27:08,631 INFO L462 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2019-11-24 04:27:08,631 INFO L463 AbstractCegarLoop]: Interpolant automaton has 19 states. [2019-11-24 04:27:08,631 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2019-11-24 04:27:08,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:27:08,632 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:27:08,632 INFO L410 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1] [2019-11-24 04:27:08,838 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:08,838 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:27:08,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:27:08,839 INFO L82 PathProgramCache]: Analyzing trace with hash 1393936535, now seen corresponding path program 3 times [2019-11-24 04:27:08,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:27:08,839 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078861554] [2019-11-24 04:27:08,839 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:27:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:27:09,775 WARN L192 SmtUtils]: Spent 593.00 ms on a formula simplification. DAG size of input: 319 DAG size of output: 61 [2019-11-24 04:27:12,464 WARN L192 SmtUtils]: Spent 2.61 s on a formula simplification. DAG size of input: 324 DAG size of output: 59 [2019-11-24 04:27:13,218 WARN L192 SmtUtils]: Spent 659.00 ms on a formula simplification. DAG size of input: 329 DAG size of output: 62 [2019-11-24 04:27:14,251 WARN L192 SmtUtils]: Spent 942.00 ms on a formula simplification. DAG size of input: 324 DAG size of output: 68 [2019-11-24 04:27:14,945 WARN L192 SmtUtils]: Spent 584.00 ms on a formula simplification. DAG size of input: 264 DAG size of output: 61 [2019-11-24 04:27:15,441 WARN L192 SmtUtils]: Spent 403.00 ms on a formula simplification. DAG size of input: 225 DAG size of output: 53 [2019-11-24 04:27:16,142 WARN L192 SmtUtils]: Spent 568.00 ms on a formula simplification. DAG size of input: 233 DAG size of output: 58 [2019-11-24 04:27:16,735 WARN L192 SmtUtils]: Spent 475.00 ms on a formula simplification. DAG size of input: 236 DAG size of output: 55 [2019-11-24 04:27:17,279 WARN L192 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 55 [2019-11-24 04:27:17,715 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 196 DAG size of output: 37 [2019-11-24 04:27:17,751 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:17,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078861554] [2019-11-24 04:27:17,751 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503747941] [2019-11-24 04:27:17,751 INFO L92 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:27:17,954 INFO L249 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2019-11-24 04:27:17,955 INFO L250 tOrderPrioritization]: Conjunction of SSA is unsat [2019-11-24 04:27:17,956 WARN L253 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 54 conjunts are in the unsatisfiable core [2019-11-24 04:27:17,959 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:27:17,996 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:18,000 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:30,226 WARN L192 SmtUtils]: Spent 12.23 s on a formula simplification. DAG size of input: 67 DAG size of output: 36 [2019-11-24 04:27:30,546 WARN L192 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 43 [2019-11-24 04:27:31,166 WARN L192 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 52 [2019-11-24 04:27:35,726 WARN L192 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 78 DAG size of output: 59 [2019-11-24 04:27:36,406 WARN L227 Elim1Store]: Array PQE input equivalent to false [2019-11-24 04:27:39,180 WARN L192 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 130 DAG size of output: 69 [2019-11-24 04:27:39,820 WARN L192 SmtUtils]: Spent 583.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-24 04:27:40,253 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-24 04:27:43,817 WARN L192 SmtUtils]: Spent 3.56 s on a formula simplification. DAG size of input: 60 DAG size of output: 59 [2019-11-24 04:27:44,595 WARN L192 SmtUtils]: Spent 657.00 ms on a formula simplification that was a NOOP. DAG size: 45 [2019-11-24 04:27:46,776 WARN L192 SmtUtils]: Spent 2.18 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2019-11-24 04:27:47,193 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:27:47,193 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:27:49,706 WARN L192 SmtUtils]: Spent 467.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2019-11-24 04:27:51,170 WARN L192 SmtUtils]: Spent 755.00 ms on a formula simplification that was a NOOP. DAG size: 64 [2019-11-24 04:27:57,022 WARN L192 SmtUtils]: Spent 5.07 s on a formula simplification that was a NOOP. DAG size: 68