/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/loop-lit/gr2006.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:21:37,031 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:21:37,033 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:21:37,049 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:21:37,049 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:21:37,051 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:21:37,053 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:21:37,062 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:21:37,066 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:21:37,069 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:21:37,070 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:21:37,072 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-11-24 04:21:37,072 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-11-24 04:21:37,074 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-11-24 04:21:37,076 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-11-24 04:21:37,078 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-11-24 04:21:37,079 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-11-24 04:21:37,080 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-11-24 04:21:37,081 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-11-24 04:21:37,086 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-11-24 04:21:37,091 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-11-24 04:21:37,094 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-11-24 04:21:37,095 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-11-24 04:21:37,096 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-11-24 04:21:37,097 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2019-11-24 04:21:37,108 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 04:21:37,122 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:21:37,122 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:21:37,123 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:21:37,123 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:21:37,124 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:21:37,124 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:21:37,124 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:21:37,124 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:21:37,124 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:21:37,125 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:21:37,125 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:21:37,125 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:21:37,125 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:21:37,125 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:21:37,126 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:21:37,126 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:21:37,127 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:21:37,127 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:21:37,127 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:21:37,127 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:21:37,127 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:21:37,127 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:21:37,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:21:37,128 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:21:37,128 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:21:37,128 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:21:37,128 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:21:37,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:21:37,129 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:21:37,129 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:21:37,129 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:21:37,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:21:37,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:21:37,130 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:21:37,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:21:37,130 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:21:37,130 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:21:37,131 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:21:37,435 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:21:37,448 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:21:37,451 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:21:37,453 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:21:37,453 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:21:37,454 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/gr2006.i [2019-11-24 04:21:37,526 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5a8f4a4/dcf078483e4949da987acdb08757c413/FLAGdaaf9e4ea [2019-11-24 04:21:37,955 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:21:37,956 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/gr2006.i [2019-11-24 04:21:37,961 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5a8f4a4/dcf078483e4949da987acdb08757c413/FLAGdaaf9e4ea [2019-11-24 04:21:38,340 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1f5a8f4a4/dcf078483e4949da987acdb08757c413 [2019-11-24 04:21:38,350 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:21:38,352 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:21:38,353 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:21:38,353 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:21:38,360 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:21:38,360 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,363 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3a736ba9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38, skipping insertion in model container [2019-11-24 04:21:38,364 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,372 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:21:38,391 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:21:38,549 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:21:38,553 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:21:38,569 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:21:38,583 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:21:38,584 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38 WrapperNode [2019-11-24 04:21:38,584 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:21:38,585 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:21:38,585 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:21:38,585 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:21:38,594 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,600 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,615 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:21:38,616 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:21:38,616 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:21:38,616 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:21:38,705 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,705 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,706 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,706 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,710 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,715 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,716 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (1/1) ... [2019-11-24 04:21:38,717 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:21:38,717 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:21:38,717 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:21:38,717 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:21:38,718 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (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 04:21:38,765 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:21:38,766 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:21:38,974 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:21:38,974 INFO L284 CfgBuilder]: Removed 7 assume(true) statements. [2019-11-24 04:21:38,976 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:21:38 BoogieIcfgContainer [2019-11-24 04:21:38,976 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:21:38,978 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:21:38,978 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:21:38,983 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:21:38,983 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:21:38" (1/3) ... [2019-11-24 04:21:38,985 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2950fc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:21:38, skipping insertion in model container [2019-11-24 04:21:38,985 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:21:38" (2/3) ... [2019-11-24 04:21:38,986 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2950fc65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:21:38, skipping insertion in model container [2019-11-24 04:21:38,986 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:21:38" (3/3) ... [2019-11-24 04:21:38,988 INFO L109 eAbstractionObserver]: Analyzing ICFG gr2006.i [2019-11-24 04:21:39,001 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:21:39,010 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:21:39,042 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:21:39,078 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:21:39,078 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:21:39,078 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:21:39,078 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:21:39,079 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:21:39,079 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:21:39,079 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:21:39,079 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:21:39,092 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:21:39,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2019-11-24 04:21:39,097 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:21:39,097 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2019-11-24 04:21:39,098 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:21:39,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:21:39,103 INFO L82 PathProgramCache]: Analyzing trace with hash 30888399, now seen corresponding path program 1 times [2019-11-24 04:21:39,110 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:21:39,111 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1112872420] [2019-11-24 04:21:39,111 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:21:39,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:21:39,196 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 04:21:39,197 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1112872420] [2019-11-24 04:21:39,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:21:39,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:21:39,200 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994769627] [2019-11-24 04:21:39,205 INFO L442 AbstractCegarLoop]: Interpolant automaton has 2 states [2019-11-24 04:21:39,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:21:39,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2019-11-24 04:21:39,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2019-11-24 04:21:39,221 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 2 states. [2019-11-24 04:21:39,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:21:39,235 INFO L93 Difference]: Finished difference Result 15 states and 17 transitions. [2019-11-24 04:21:39,235 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2019-11-24 04:21:39,236 INFO L78 Accepts]: Start accepts. Automaton has 2 states. Word has length 5 [2019-11-24 04:21:39,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:21:39,244 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:21:39,244 INFO L226 Difference]: Without dead ends: 7 [2019-11-24 04:21:39,247 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 04:21:39,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7 states. [2019-11-24 04:21:39,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7 to 7. [2019-11-24 04:21:39,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2019-11-24 04:21:39,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 7 transitions. [2019-11-24 04:21:39,273 INFO L78 Accepts]: Start accepts. Automaton has 7 states and 7 transitions. Word has length 5 [2019-11-24 04:21:39,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:21:39,274 INFO L462 AbstractCegarLoop]: Abstraction has 7 states and 7 transitions. [2019-11-24 04:21:39,274 INFO L463 AbstractCegarLoop]: Interpolant automaton has 2 states. [2019-11-24 04:21:39,274 INFO L276 IsEmpty]: Start isEmpty. Operand 7 states and 7 transitions. [2019-11-24 04:21:39,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2019-11-24 04:21:39,274 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:21:39,275 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2019-11-24 04:21:39,275 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:21:39,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:21:39,275 INFO L82 PathProgramCache]: Analyzing trace with hash 956435187, now seen corresponding path program 1 times [2019-11-24 04:21:39,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:21:39,276 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813604664] [2019-11-24 04:21:39,276 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:21:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:21:39,353 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 04:21:39,353 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813604664] [2019-11-24 04:21:39,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:21:39,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-11-24 04:21:39,354 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [99085806] [2019-11-24 04:21:39,355 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:21:39,356 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:21:39,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:21:39,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:21:39,357 INFO L87 Difference]: Start difference. First operand 7 states and 7 transitions. Second operand 4 states. [2019-11-24 04:21:39,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:21:39,441 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2019-11-24 04:21:39,442 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:21:39,442 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2019-11-24 04:21:39,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:21:39,443 INFO L225 Difference]: With dead ends: 14 [2019-11-24 04:21:39,443 INFO L226 Difference]: Without dead ends: 10 [2019-11-24 04:21:39,447 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 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 04:21:39,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2019-11-24 04:21:39,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2019-11-24 04:21:39,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:21:39,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2019-11-24 04:21:39,451 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2019-11-24 04:21:39,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:21:39,452 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2019-11-24 04:21:39,452 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:21:39,452 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2019-11-24 04:21:39,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:21:39,453 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:21:39,453 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2019-11-24 04:21:39,453 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:21:39,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:21:39,454 INFO L82 PathProgramCache]: Analyzing trace with hash 84823017, now seen corresponding path program 1 times [2019-11-24 04:21:39,454 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:21:39,455 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136433366] [2019-11-24 04:21:39,455 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:21:39,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:21:39,512 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 04:21:39,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136433366] [2019-11-24 04:21:39,513 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787674045] [2019-11-24 04:21:39,513 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 04:21:39,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:21:39,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 19 conjuncts, 6 conjunts are in the unsatisfiable core [2019-11-24 04:21:39,573 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:21:39,617 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:21:39,687 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:21:39,718 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 04:21:39,721 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:21:39,738 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:21:39,787 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:21:39,810 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 2 terms [2019-11-24 04:21:39,879 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 04:21:39,880 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [159660420] [2019-11-24 04:21:39,905 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-24 04:21:39,905 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:21:39,912 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:21:39,921 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:21:39,923 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:21:40,923 WARN L192 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 315 DAG size of output: 315 [2019-11-24 04:21:41,167 WARN L192 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 316 DAG size of output: 315 [2019-11-24 04:21:41,708 WARN L192 SmtUtils]: Spent 468.00 ms on a formula simplification. DAG size of input: 677 DAG size of output: 663 [2019-11-24 04:21:42,300 WARN L192 SmtUtils]: Spent 482.00 ms on a formula simplification. DAG size of input: 661 DAG size of output: 653 [2019-11-24 04:21:43,616 WARN L192 SmtUtils]: Spent 1.21 s on a formula simplification. DAG size of input: 1426 DAG size of output: 1392 [2019-11-24 04:21:44,847 WARN L192 SmtUtils]: Spent 981.00 ms on a formula simplification. DAG size of input: 1359 DAG size of output: 1324 [2019-11-24 04:21:48,549 WARN L192 SmtUtils]: Spent 3.50 s on a formula simplification. DAG size of input: 2783 DAG size of output: 2699 [2019-11-24 04:21:52,984 WARN L192 SmtUtils]: Spent 3.34 s on a formula simplification. DAG size of input: 2620 DAG size of output: 2556 [2019-11-24 04:21:57,958 WARN L192 SmtUtils]: Spent 3.38 s on a formula simplification that was a NOOP. DAG size: 2531 [2019-11-24 04:22:01,321 WARN L192 SmtUtils]: Spent 3.36 s on a formula simplification. DAG size of input: 2532 DAG size of output: 2531 [2019-11-24 04:22:05,970 WARN L192 SmtUtils]: Spent 3.19 s on a formula simplification that was a NOOP. DAG size: 2539 [2019-11-24 04:22:09,189 WARN L192 SmtUtils]: Spent 3.22 s on a formula simplification. DAG size of input: 2540 DAG size of output: 2539 [2019-11-24 04:22:13,744 WARN L192 SmtUtils]: Spent 3.23 s on a formula simplification that was a NOOP. DAG size: 2546 [2019-11-24 04:22:16,945 WARN L192 SmtUtils]: Spent 3.20 s on a formula simplification. DAG size of input: 2547 DAG size of output: 2546 [2019-11-24 04:22:21,549 WARN L192 SmtUtils]: Spent 3.23 s on a formula simplification that was a NOOP. DAG size: 2553 [2019-11-24 04:22:24,842 WARN L192 SmtUtils]: Spent 3.29 s on a formula simplification. DAG size of input: 2554 DAG size of output: 2553 [2019-11-24 04:22:29,774 WARN L192 SmtUtils]: Spent 3.58 s on a formula simplification that was a NOOP. DAG size: 2560 [2019-11-24 04:22:33,424 WARN L192 SmtUtils]: Spent 3.65 s on a formula simplification. DAG size of input: 2561 DAG size of output: 2560 [2019-11-24 04:22:38,489 WARN L192 SmtUtils]: Spent 3.73 s on a formula simplification that was a NOOP. DAG size: 2567 [2019-11-24 04:22:42,224 WARN L192 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 2568 DAG size of output: 2567 [2019-11-24 04:22:47,219 WARN L192 SmtUtils]: Spent 3.65 s on a formula simplification that was a NOOP. DAG size: 2574 [2019-11-24 04:22:50,856 WARN L192 SmtUtils]: Spent 3.63 s on a formula simplification. DAG size of input: 2575 DAG size of output: 2574 [2019-11-24 04:22:55,807 WARN L192 SmtUtils]: Spent 3.63 s on a formula simplification that was a NOOP. DAG size: 2581 [2019-11-24 04:22:59,469 WARN L192 SmtUtils]: Spent 3.66 s on a formula simplification. DAG size of input: 2582 DAG size of output: 2581 [2019-11-24 04:23:04,580 WARN L192 SmtUtils]: Spent 3.77 s on a formula simplification that was a NOOP. DAG size: 2588 [2019-11-24 04:23:08,282 WARN L192 SmtUtils]: Spent 3.70 s on a formula simplification. DAG size of input: 2589 DAG size of output: 2588 [2019-11-24 04:23:13,723 WARN L192 SmtUtils]: Spent 4.00 s on a formula simplification that was a NOOP. DAG size: 2595 [2019-11-24 04:23:17,916 WARN L192 SmtUtils]: Spent 4.19 s on a formula simplification. DAG size of input: 2596 DAG size of output: 2595 [2019-11-24 04:23:23,307 WARN L192 SmtUtils]: Spent 4.05 s on a formula simplification that was a NOOP. DAG size: 2602