/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/cggmp2005b.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:20:33,598 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:20:33,600 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:20:33,613 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2019-11-24 04:20:33,662 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 04:20:33,681 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:20:33,682 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:20:33,683 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:20:33,683 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:20:33,683 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:20:33,683 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:20:33,683 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:20:33,684 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:20:33,684 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:20:33,684 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:20:33,685 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:20:33,686 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:20:33,686 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:20:33,686 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:20:33,686 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:20:33,689 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:20:33,689 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:20:33,689 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:20:33,690 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:20:33,690 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:20:33,690 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:20:33,690 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:20:33,691 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:20:33,691 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:20:33,691 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:20:33,691 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:20:33,691 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:20:33,692 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:20:33,692 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:20:33,693 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:20:33,693 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:20:33,693 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:20:33,693 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:20:33,694 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:20:33,694 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:20:33,694 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:20:33,695 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:20:33,695 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:20:34,005 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:20:34,024 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:20:34,028 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:20:34,030 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:20:34,031 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:20:34,031 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-lit/cggmp2005b.i [2019-11-24 04:20:34,095 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aae9b0de1/664f233c2c7841fca823dbbd857aeae5/FLAG147c64bf7 [2019-11-24 04:20:34,516 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:20:34,517 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-lit/cggmp2005b.i [2019-11-24 04:20:34,523 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aae9b0de1/664f233c2c7841fca823dbbd857aeae5/FLAG147c64bf7 [2019-11-24 04:20:34,919 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/aae9b0de1/664f233c2c7841fca823dbbd857aeae5 [2019-11-24 04:20:34,928 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:20:34,930 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:20:34,930 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:20:34,932 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:20:34,936 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:20:34,937 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:20:34" (1/1) ... [2019-11-24 04:20:34,941 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@533241d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:34, skipping insertion in model container [2019-11-24 04:20:34,941 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:20:34" (1/1) ... [2019-11-24 04:20:34,949 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:20:34,970 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:20:35,139 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:20:35,144 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:20:35,161 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:20:35,176 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:20:35,176 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35 WrapperNode [2019-11-24 04:20:35,177 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:20:35,177 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:20:35,177 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:20:35,178 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:20:35,186 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,192 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,295 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:20:35,295 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:20:35,296 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:20:35,296 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:20:35,305 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,305 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,306 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,306 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,313 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,314 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (1/1) ... [2019-11-24 04:20:35,315 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:20:35,316 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:20:35,316 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:20:35,316 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:20:35,317 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (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 04:20:35,384 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:20:35,386 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:20:35,615 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:20:35,615 INFO L284 CfgBuilder]: Removed 9 assume(true) statements. [2019-11-24 04:20:35,617 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:20:35 BoogieIcfgContainer [2019-11-24 04:20:35,617 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:20:35,619 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:20:35,619 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:20:35,624 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:20:35,625 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:20:34" (1/3) ... [2019-11-24 04:20:35,626 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a2447e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:20:35, skipping insertion in model container [2019-11-24 04:20:35,626 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:20:35" (2/3) ... [2019-11-24 04:20:35,627 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@26a2447e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:20:35, skipping insertion in model container [2019-11-24 04:20:35,627 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:20:35" (3/3) ... [2019-11-24 04:20:35,629 INFO L109 eAbstractionObserver]: Analyzing ICFG cggmp2005b.i [2019-11-24 04:20:35,644 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:20:35,653 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-11-24 04:20:35,678 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-11-24 04:20:35,711 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:20:35,711 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:20:35,712 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:20:35,713 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:20:35,713 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:20:35,713 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:20:35,713 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:20:35,713 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:20:35,728 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states. [2019-11-24 04:20:35,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 5 [2019-11-24 04:20:35,733 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:20:35,734 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1] [2019-11-24 04:20:35,734 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:20:35,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:20:35,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1011357, now seen corresponding path program 1 times [2019-11-24 04:20:35,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:20:35,747 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145248248] [2019-11-24 04:20:35,747 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:20:35,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:35,885 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 04:20:35,885 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145248248] [2019-11-24 04:20:35,887 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:20:35,887 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:20:35,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249931009] [2019-11-24 04:20:35,895 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:20:35,896 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:20:35,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:20:35,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:20:35,914 INFO L87 Difference]: Start difference. First operand 9 states. Second operand 3 states. [2019-11-24 04:20:35,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:20:35,957 INFO L93 Difference]: Finished difference Result 15 states and 19 transitions. [2019-11-24 04:20:35,958 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:20:35,960 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 4 [2019-11-24 04:20:35,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:20:35,973 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:20:35,974 INFO L226 Difference]: Without dead ends: 8 [2019-11-24 04:20:35,980 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:20:36,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2019-11-24 04:20:36,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2019-11-24 04:20:36,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2019-11-24 04:20:36,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 10 transitions. [2019-11-24 04:20:36,031 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 10 transitions. Word has length 4 [2019-11-24 04:20:36,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:20:36,031 INFO L462 AbstractCegarLoop]: Abstraction has 8 states and 10 transitions. [2019-11-24 04:20:36,032 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:20:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 10 transitions. [2019-11-24 04:20:36,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2019-11-24 04:20:36,033 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:20:36,033 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:20:36,034 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:20:36,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:20:36,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1323875568, now seen corresponding path program 1 times [2019-11-24 04:20:36,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:20:36,036 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970885028] [2019-11-24 04:20:36,037 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:20:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:36,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:20:36,081 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970885028] [2019-11-24 04:20:36,082 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:20:36,082 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2019-11-24 04:20:36,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520907982] [2019-11-24 04:20:36,085 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-11-24 04:20:36,085 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:20:36,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-11-24 04:20:36,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:20:36,087 INFO L87 Difference]: Start difference. First operand 8 states and 10 transitions. Second operand 3 states. [2019-11-24 04:20:36,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:20:36,100 INFO L93 Difference]: Finished difference Result 15 states and 20 transitions. [2019-11-24 04:20:36,103 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-11-24 04:20:36,103 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 7 [2019-11-24 04:20:36,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:20:36,104 INFO L225 Difference]: With dead ends: 15 [2019-11-24 04:20:36,104 INFO L226 Difference]: Without dead ends: 9 [2019-11-24 04:20:36,105 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-11-24 04:20:36,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2019-11-24 04:20:36,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2019-11-24 04:20:36,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2019-11-24 04:20:36,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 11 transitions. [2019-11-24 04:20:36,110 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 11 transitions. Word has length 7 [2019-11-24 04:20:36,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:20:36,110 INFO L462 AbstractCegarLoop]: Abstraction has 9 states and 11 transitions. [2019-11-24 04:20:36,111 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-11-24 04:20:36,111 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 11 transitions. [2019-11-24 04:20:36,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:20:36,112 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:20:36,112 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:20:36,112 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:20:36,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:20:36,114 INFO L82 PathProgramCache]: Analyzing trace with hash 818898161, now seen corresponding path program 1 times [2019-11-24 04:20:36,114 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:20:36,114 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608997365] [2019-11-24 04:20:36,115 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:20:36,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:20:36,174 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608997365] [2019-11-24 04:20:36,175 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994500083] [2019-11-24 04:20:36,175 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 04:20:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:20:36,212 INFO L255 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 3 conjunts are in the unsatisfiable core [2019-11-24 04:20:36,217 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:20:36,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:20:36,239 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:20:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:20:36,272 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1896490150] [2019-11-24 04:20:36,299 INFO L159 IcfgInterpreter]: Started Sifa with 7 locations of interest [2019-11-24 04:20:36,299 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:20:36,306 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:20:36,313 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:20:36,314 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:20:39,236 WARN L192 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 346 DAG size of output: 302 [2019-11-24 04:20:39,749 WARN L192 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 338 [2019-11-24 04:20:40,037 WARN L192 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 411 DAG size of output: 363 [2019-11-24 04:20:40,351 WARN L192 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 436 DAG size of output: 389 [2019-11-24 04:20:40,565 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 384 DAG size of output: 381 [2019-11-24 04:20:40,749 WARN L192 SmtUtils]: Spent 161.00 ms on a formula simplification. DAG size of input: 471 DAG size of output: 424 [2019-11-24 04:20:40,922 WARN L192 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 416 DAG size of output: 412 [2019-11-24 04:20:41,215 WARN L192 SmtUtils]: Spent 267.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 472 [2019-11-24 04:20:41,414 WARN L192 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 467 DAG size of output: 463 [2019-11-24 04:20:41,656 WARN L192 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 568 DAG size of output: 523 [2019-11-24 04:20:41,944 WARN L192 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 520 DAG size of output: 516 [2019-11-24 04:20:42,223 WARN L192 SmtUtils]: Spent 247.00 ms on a formula simplification. DAG size of input: 628 DAG size of output: 582 [2019-11-24 04:20:42,593 WARN L192 SmtUtils]: Spent 281.00 ms on a formula simplification. DAG size of input: 573 DAG size of output: 566 [2019-11-24 04:20:42,990 WARN L192 SmtUtils]: Spent 290.00 ms on a formula simplification that was a NOOP. DAG size: 567 [2019-11-24 04:20:43,234 WARN L192 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 568 DAG size of output: 567 [2019-11-24 04:20:43,597 WARN L192 SmtUtils]: Spent 273.00 ms on a formula simplification that was a NOOP. DAG size: 571 [2019-11-24 04:20:43,855 WARN L192 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 572 DAG size of output: 571 [2019-11-24 04:20:44,335 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification that was a NOOP. DAG size: 575 [2019-11-24 04:20:44,574 WARN L192 SmtUtils]: Spent 235.00 ms on a formula simplification. DAG size of input: 576 DAG size of output: 575 [2019-11-24 04:20:44,891 WARN L192 SmtUtils]: Spent 243.00 ms on a formula simplification that was a NOOP. DAG size: 579 [2019-11-24 04:20:45,123 WARN L192 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 580 DAG size of output: 580 [2019-11-24 04:20:45,506 WARN L192 SmtUtils]: Spent 350.00 ms on a formula simplification. DAG size of input: 724 DAG size of output: 677 [2019-11-24 04:20:45,993 WARN L192 SmtUtils]: Spent 405.00 ms on a formula simplification. DAG size of input: 674 DAG size of output: 666 [2019-11-24 04:20:46,414 WARN L192 SmtUtils]: Spent 334.00 ms on a formula simplification that was a NOOP. DAG size: 666 [2019-11-24 04:20:46,753 WARN L192 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 667 DAG size of output: 667 [2019-11-24 04:20:47,295 WARN L192 SmtUtils]: Spent 506.00 ms on a formula simplification. DAG size of input: 827 DAG size of output: 780 [2019-11-24 04:20:47,916 WARN L192 SmtUtils]: Spent 554.00 ms on a formula simplification. DAG size of input: 775 DAG size of output: 767 [2019-11-24 04:20:48,561 WARN L192 SmtUtils]: Spent 551.00 ms on a formula simplification that was a NOOP. DAG size: 769 [2019-11-24 04:20:49,117 WARN L192 SmtUtils]: Spent 553.00 ms on a formula simplification. DAG size of input: 770 DAG size of output: 769 [2019-11-24 04:20:49,728 WARN L192 SmtUtils]: Spent 524.00 ms on a formula simplification that was a NOOP. DAG size: 773 [2019-11-24 04:20:50,276 WARN L192 SmtUtils]: Spent 545.00 ms on a formula simplification. DAG size of input: 774 DAG size of output: 773 [2019-11-24 04:20:50,887 WARN L192 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 777 [2019-11-24 04:20:51,463 WARN L192 SmtUtils]: Spent 573.00 ms on a formula simplification. DAG size of input: 778 DAG size of output: 777 [2019-11-24 04:20:52,064 WARN L192 SmtUtils]: Spent 529.00 ms on a formula simplification that was a NOOP. DAG size: 781 [2019-11-24 04:20:52,595 WARN L192 SmtUtils]: Spent 529.00 ms on a formula simplification. DAG size of input: 782 DAG size of output: 782 [2019-11-24 04:20:53,414 WARN L192 SmtUtils]: Spent 780.00 ms on a formula simplification. DAG size of input: 951 DAG size of output: 902 [2019-11-24 04:20:54,311 WARN L192 SmtUtils]: Spent 818.00 ms on a formula simplification. DAG size of input: 897 DAG size of output: 892 [2019-11-24 04:20:55,406 WARN L192 SmtUtils]: Spent 1.06 s on a formula simplification. DAG size of input: 1082 DAG size of output: 1033 [2019-11-24 04:20:56,660 WARN L192 SmtUtils]: Spent 1.17 s on a formula simplification. DAG size of input: 1023 DAG size of output: 1018 [2019-11-24 04:20:58,341 WARN L192 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1263 DAG size of output: 1214 [2019-11-24 04:21:00,194 WARN L192 SmtUtils]: Spent 1.74 s on a formula simplification. DAG size of input: 1208 DAG size of output: 1205 [2019-11-24 04:21:02,803 WARN L192 SmtUtils]: Spent 2.54 s on a formula simplification. DAG size of input: 1460 DAG size of output: 1410 [2019-11-24 04:21:05,735 WARN L192 SmtUtils]: Spent 2.77 s on a formula simplification. DAG size of input: 1397 DAG size of output: 1390 [2019-11-24 04:21:10,133 WARN L192 SmtUtils]: Spent 4.30 s on a formula simplification. DAG size of input: 1743 DAG size of output: 1686 [2019-11-24 04:21:15,187 WARN L192 SmtUtils]: Spent 4.81 s on a formula simplification. DAG size of input: 1680 DAG size of output: 1676 [2019-11-24 04:21:22,183 WARN L192 SmtUtils]: Spent 6.90 s on a formula simplification. DAG size of input: 2059 DAG size of output: 2009 [2019-11-24 04:21:29,830 WARN L192 SmtUtils]: Spent 7.31 s on a formula simplification. DAG size of input: 1998 DAG size of output: 1955 [2019-11-24 04:21:38,070 WARN L192 SmtUtils]: Spent 7.96 s on a formula simplification that was a NOOP. DAG size: 1924 [2019-11-24 04:21:45,985 WARN L192 SmtUtils]: Spent 7.91 s on a formula simplification. DAG size of input: 1925 DAG size of output: 1925 [2019-11-24 04:21:57,498 WARN L192 SmtUtils]: Spent 11.36 s on a formula simplification. DAG size of input: 2447 DAG size of output: 2401 [2019-11-24 04:22:10,803 WARN L192 SmtUtils]: Spent 13.06 s on a formula simplification. DAG size of input: 2397 DAG size of output: 2391