/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-invgen/nested6.i -------------------------------------------------------------------------------- This is Ultimate 0.1.24-6598664 [2019-11-24 04:19:41,517 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-11-24 04:19:41,519 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-11-24 04:19:41,537 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-11-24 04:19:41,537 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-11-24 04:19:41,539 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-11-24 04:19:41,540 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-11-24 04:19:41,550 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-11-24 04:19:41,553 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-11-24 04:19:41,556 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-11-24 04:19:41,558 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-11-24 04:19:41,560 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... 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[2019-11-24 04:19:41,599 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 04:19:41,629 INFO L113 SettingsManager]: Loading preferences was successful [2019-11-24 04:19:41,629 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-11-24 04:19:41,633 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2019-11-24 04:19:41,634 INFO L138 SettingsManager]: * User list type=DISABLED [2019-11-24 04:19:41,634 INFO L136 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2019-11-24 04:19:41,634 INFO L138 SettingsManager]: * Explicit value domain=true [2019-11-24 04:19:41,634 INFO L138 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2019-11-24 04:19:41,634 INFO L138 SettingsManager]: * Octagon Domain=false [2019-11-24 04:19:41,634 INFO L138 SettingsManager]: * Abstract domain=CompoundDomain [2019-11-24 04:19:41,635 INFO L138 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2019-11-24 04:19:41,637 INFO L138 SettingsManager]: * Use the RCFG-of-the-future interface=true [2019-11-24 04:19:41,637 INFO L138 SettingsManager]: * Interval Domain=false [2019-11-24 04:19:41,637 INFO L136 SettingsManager]: Preferences of Sifa differ from their defaults: [2019-11-24 04:19:41,638 INFO L138 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2019-11-24 04:19:41,638 INFO L138 SettingsManager]: * Simplification Technique=SIMPLIFY_QUICK [2019-11-24 04:19:41,638 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-11-24 04:19:41,639 INFO L138 SettingsManager]: * sizeof long=4 [2019-11-24 04:19:41,639 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-11-24 04:19:41,639 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-11-24 04:19:41,642 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-11-24 04:19:41,642 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-11-24 04:19:41,642 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-11-24 04:19:41,643 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-11-24 04:19:41,646 INFO L138 SettingsManager]: * sizeof long double=12 [2019-11-24 04:19:41,646 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-11-24 04:19:41,646 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-11-24 04:19:41,647 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-11-24 04:19:41,647 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-11-24 04:19:41,647 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-11-24 04:19:41,647 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-11-24 04:19:41,647 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-11-24 04:19:41,649 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-11-24 04:19:41,649 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-11-24 04:19:41,649 INFO L138 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2019-11-24 04:19:41,649 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-11-24 04:19:41,650 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-11-24 04:19:41,650 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2019-11-24 04:19:41,650 INFO L138 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES [2019-11-24 04:19:41,923 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-11-24 04:19:41,935 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-11-24 04:19:41,939 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-11-24 04:19:41,940 INFO L271 PluginConnector]: Initializing CDTParser... [2019-11-24 04:19:41,941 INFO L275 PluginConnector]: CDTParser initialized [2019-11-24 04:19:41,941 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-invgen/nested6.i [2019-11-24 04:19:42,013 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f704570/7ecef9ead9bf48d3b7395b60426bad99/FLAG90c70032e [2019-11-24 04:19:42,452 INFO L306 CDTParser]: Found 1 translation units. [2019-11-24 04:19:42,452 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-invgen/nested6.i [2019-11-24 04:19:42,459 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f704570/7ecef9ead9bf48d3b7395b60426bad99/FLAG90c70032e [2019-11-24 04:19:42,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e5f704570/7ecef9ead9bf48d3b7395b60426bad99 [2019-11-24 04:19:42,898 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-11-24 04:19:42,899 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2019-11-24 04:19:42,900 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-11-24 04:19:42,900 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-11-24 04:19:42,904 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-11-24 04:19:42,905 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:19:42" (1/1) ... [2019-11-24 04:19:42,908 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@d9e7c90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:42, skipping insertion in model container [2019-11-24 04:19:42,908 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.11 04:19:42" (1/1) ... [2019-11-24 04:19:42,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2019-11-24 04:19:42,935 INFO L178 MainTranslator]: Built tables and reachable declarations [2019-11-24 04:19:43,132 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:19:43,136 INFO L203 MainTranslator]: Completed pre-run [2019-11-24 04:19:43,152 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-11-24 04:19:43,164 INFO L208 MainTranslator]: Completed translation [2019-11-24 04:19:43,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43 WrapperNode [2019-11-24 04:19:43,165 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-11-24 04:19:43,166 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2019-11-24 04:19:43,166 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2019-11-24 04:19:43,166 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2019-11-24 04:19:43,172 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,176 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,284 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2019-11-24 04:19:43,285 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-11-24 04:19:43,285 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-11-24 04:19:43,285 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-11-24 04:19:43,294 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,294 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,295 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,295 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,298 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,302 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,303 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (1/1) ... [2019-11-24 04:19:43,305 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-11-24 04:19:43,305 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-11-24 04:19:43,306 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-11-24 04:19:43,306 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-11-24 04:19:43,307 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (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 04:19:43,369 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-11-24 04:19:43,369 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-11-24 04:19:43,659 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-11-24 04:19:43,660 INFO L284 CfgBuilder]: Removed 13 assume(true) statements. [2019-11-24 04:19:43,661 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:19:43 BoogieIcfgContainer [2019-11-24 04:19:43,661 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-11-24 04:19:43,662 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-11-24 04:19:43,662 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-11-24 04:19:43,667 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-11-24 04:19:43,667 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.11 04:19:42" (1/3) ... [2019-11-24 04:19:43,668 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522c2bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:19:43, skipping insertion in model container [2019-11-24 04:19:43,668 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.11 04:19:43" (2/3) ... [2019-11-24 04:19:43,669 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@522c2bc0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.11 04:19:43, skipping insertion in model container [2019-11-24 04:19:43,669 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.11 04:19:43" (3/3) ... [2019-11-24 04:19:43,671 INFO L109 eAbstractionObserver]: Analyzing ICFG nested6.i [2019-11-24 04:19:43,692 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-11-24 04:19:43,701 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 3 error locations. [2019-11-24 04:19:43,711 INFO L249 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2019-11-24 04:19:43,736 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-11-24 04:19:43,736 INFO L374 AbstractCegarLoop]: Hoare is true [2019-11-24 04:19:43,736 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-11-24 04:19:43,736 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-11-24 04:19:43,736 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-11-24 04:19:43,736 INFO L378 AbstractCegarLoop]: Difference is false [2019-11-24 04:19:43,737 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-11-24 04:19:43,737 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-11-24 04:19:43,749 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states. [2019-11-24 04:19:43,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2019-11-24 04:19:43,754 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:43,754 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:43,755 INFO L410 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:43,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:43,759 INFO L82 PathProgramCache]: Analyzing trace with hash -646731012, now seen corresponding path program 1 times [2019-11-24 04:19:43,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:43,767 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824862245] [2019-11-24 04:19:43,767 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:43,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:43,934 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 04:19:43,935 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824862245] [2019-11-24 04:19:43,936 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:19:43,936 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:19:43,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986799206] [2019-11-24 04:19:43,943 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:19:43,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:43,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:19:43,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:19:43,960 INFO L87 Difference]: Start difference. First operand 22 states. Second operand 4 states. [2019-11-24 04:19:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:44,079 INFO L93 Difference]: Finished difference Result 50 states and 66 transitions. [2019-11-24 04:19:44,080 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:19:44,081 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 8 [2019-11-24 04:19:44,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:44,091 INFO L225 Difference]: With dead ends: 50 [2019-11-24 04:19:44,092 INFO L226 Difference]: Without dead ends: 22 [2019-11-24 04:19:44,095 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:19:44,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2019-11-24 04:19:44,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 17. [2019-11-24 04:19:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 17 states. [2019-11-24 04:19:44,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2019-11-24 04:19:44,131 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 8 [2019-11-24 04:19:44,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:44,132 INFO L462 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2019-11-24 04:19:44,132 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:19:44,132 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2019-11-24 04:19:44,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2019-11-24 04:19:44,133 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:44,133 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:44,134 INFO L410 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:44,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:44,134 INFO L82 PathProgramCache]: Analyzing trace with hash 1425410569, now seen corresponding path program 1 times [2019-11-24 04:19:44,135 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:44,135 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185630081] [2019-11-24 04:19:44,135 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:44,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:44,194 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 04:19:44,195 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185630081] [2019-11-24 04:19:44,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:19:44,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-11-24 04:19:44,196 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442049710] [2019-11-24 04:19:44,197 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-11-24 04:19:44,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:44,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-11-24 04:19:44,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-11-24 04:19:44,201 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand 5 states. [2019-11-24 04:19:44,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:44,362 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2019-11-24 04:19:44,363 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2019-11-24 04:19:44,363 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 9 [2019-11-24 04:19:44,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:44,364 INFO L225 Difference]: With dead ends: 32 [2019-11-24 04:19:44,364 INFO L226 Difference]: Without dead ends: 30 [2019-11-24 04:19:44,366 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2019-11-24 04:19:44,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-24 04:19:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 15. [2019-11-24 04:19:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2019-11-24 04:19:44,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2019-11-24 04:19:44,372 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 9 [2019-11-24 04:19:44,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:44,373 INFO L462 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2019-11-24 04:19:44,373 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-11-24 04:19:44,373 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2019-11-24 04:19:44,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2019-11-24 04:19:44,374 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:44,374 INFO L410 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:44,374 INFO L410 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:44,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:44,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1261912383, now seen corresponding path program 1 times [2019-11-24 04:19:44,375 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:44,375 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754311919] [2019-11-24 04:19:44,375 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:44,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:44,413 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 04:19:44,413 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754311919] [2019-11-24 04:19:44,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:19:44,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-11-24 04:19:44,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136487793] [2019-11-24 04:19:44,415 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-11-24 04:19:44,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:44,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-11-24 04:19:44,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-11-24 04:19:44,416 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand 4 states. [2019-11-24 04:19:44,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:44,519 INFO L93 Difference]: Finished difference Result 32 states and 42 transitions. [2019-11-24 04:19:44,519 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-11-24 04:19:44,520 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 10 [2019-11-24 04:19:44,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:44,521 INFO L225 Difference]: With dead ends: 32 [2019-11-24 04:19:44,521 INFO L226 Difference]: Without dead ends: 30 [2019-11-24 04:19:44,522 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 04:19:44,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2019-11-24 04:19:44,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 22. [2019-11-24 04:19:44,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2019-11-24 04:19:44,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2019-11-24 04:19:44,531 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 10 [2019-11-24 04:19:44,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:44,531 INFO L462 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2019-11-24 04:19:44,531 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-11-24 04:19:44,531 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2019-11-24 04:19:44,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2019-11-24 04:19:44,532 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:44,532 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:44,533 INFO L410 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:44,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:44,533 INFO L82 PathProgramCache]: Analyzing trace with hash 586786737, now seen corresponding path program 1 times [2019-11-24 04:19:44,534 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:44,534 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772313889] [2019-11-24 04:19:44,534 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:44,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:44,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:44,618 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772313889] [2019-11-24 04:19:44,619 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-11-24 04:19:44,619 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2019-11-24 04:19:44,619 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019910452] [2019-11-24 04:19:44,620 INFO L442 AbstractCegarLoop]: Interpolant automaton has 6 states [2019-11-24 04:19:44,620 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:44,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2019-11-24 04:19:44,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2019-11-24 04:19:44,621 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand 6 states. [2019-11-24 04:19:44,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:44,842 INFO L93 Difference]: Finished difference Result 54 states and 73 transitions. [2019-11-24 04:19:44,842 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2019-11-24 04:19:44,842 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 14 [2019-11-24 04:19:44,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:44,845 INFO L225 Difference]: With dead ends: 54 [2019-11-24 04:19:44,845 INFO L226 Difference]: Without dead ends: 52 [2019-11-24 04:19:44,846 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2019-11-24 04:19:44,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2019-11-24 04:19:44,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 25. [2019-11-24 04:19:44,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-24 04:19:44,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 32 transitions. [2019-11-24 04:19:44,855 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 32 transitions. Word has length 14 [2019-11-24 04:19:44,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:44,855 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 32 transitions. [2019-11-24 04:19:44,855 INFO L463 AbstractCegarLoop]: Interpolant automaton has 6 states. [2019-11-24 04:19:44,856 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 32 transitions. [2019-11-24 04:19:44,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2019-11-24 04:19:44,856 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:44,856 INFO L410 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:44,857 INFO L410 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:44,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash -860836954, now seen corresponding path program 1 times [2019-11-24 04:19:44,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:44,858 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696182477] [2019-11-24 04:19:44,858 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:44,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:44,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696182477] [2019-11-24 04:19:44,936 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225913208] [2019-11-24 04:19:44,937 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 04:19:44,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:44,980 INFO L255 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:19:44,986 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:19:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:19:45,092 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:19:45,492 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2019-11-24 04:19:45,492 INFO L220 FreeRefinementEngine]: Constructing automaton from 2 perfect and 1 imperfect interpolant sequences. [2019-11-24 04:19:45,492 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5, 5] imperfect sequences [8] total 12 [2019-11-24 04:19:45,493 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836625407] [2019-11-24 04:19:45,493 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-11-24 04:19:45,493 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2019-11-24 04:19:45,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-11-24 04:19:45,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=107, Unknown=0, NotChecked=0, Total=132 [2019-11-24 04:19:45,494 INFO L87 Difference]: Start difference. First operand 25 states and 32 transitions. Second operand 7 states. [2019-11-24 04:19:45,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-11-24 04:19:45,857 INFO L93 Difference]: Finished difference Result 77 states and 100 transitions. [2019-11-24 04:19:45,857 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2019-11-24 04:19:45,857 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 16 [2019-11-24 04:19:45,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-11-24 04:19:45,858 INFO L225 Difference]: With dead ends: 77 [2019-11-24 04:19:45,858 INFO L226 Difference]: Without dead ends: 55 [2019-11-24 04:19:45,859 INFO L630 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2019-11-24 04:19:45,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2019-11-24 04:19:45,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 25. [2019-11-24 04:19:45,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2019-11-24 04:19:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2019-11-24 04:19:45,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 16 [2019-11-24 04:19:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-11-24 04:19:45,867 INFO L462 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2019-11-24 04:19:45,867 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-11-24 04:19:45,868 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2019-11-24 04:19:45,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2019-11-24 04:19:45,868 INFO L402 BasicCegarLoop]: Found error trace [2019-11-24 04:19:45,868 INFO L410 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-11-24 04:19:46,073 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:19:46,073 INFO L410 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr2ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-11-24 04:19:46,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-11-24 04:19:46,074 INFO L82 PathProgramCache]: Analyzing trace with hash -838529413, now seen corresponding path program 1 times [2019-11-24 04:19:46,074 INFO L163 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-11-24 04:19:46,075 INFO L348 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081659608] [2019-11-24 04:19:46,076 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-11-24 04:19:46,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:46,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081659608] [2019-11-24 04:19:46,177 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765108846] [2019-11-24 04:19:46,178 INFO L94 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-11-24 04:19:46,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-11-24 04:19:46,205 INFO L255 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 5 conjunts are in the unsatisfiable core [2019-11-24 04:19:46,206 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2019-11-24 04:19:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:46,244 INFO L320 TraceCheckSpWp]: Computing backward predicates... [2019-11-24 04:19:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-11-24 04:19:46,268 INFO L348 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1939228740] [2019-11-24 04:19:46,316 INFO L159 IcfgInterpreter]: Started Sifa with 15 locations of interest [2019-11-24 04:19:46,316 INFO L166 IcfgInterpreter]: Building call graph [2019-11-24 04:19:46,330 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-11-24 04:19:46,342 INFO L176 IcfgInterpreter]: Starting interpretation [2019-11-24 04:19:46,343 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-11-24 04:19:47,733 WARN L192 SmtUtils]: Spent 260.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 243 [2019-11-24 04:19:47,965 WARN L192 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 248 DAG size of output: 243 [2019-11-24 04:19:48,129 WARN L192 SmtUtils]: Spent 160.00 ms on a formula simplification that was a NOOP. DAG size: 242 [2019-11-24 04:19:48,330 WARN L192 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 235 DAG size of output: 233 [2019-11-24 04:19:48,589 WARN L192 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 234 DAG size of output: 230 [2019-11-24 04:19:49,048 WARN L192 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 348 [2019-11-24 04:19:49,332 WARN L192 SmtUtils]: Spent 280.00 ms on a formula simplification. DAG size of input: 373 DAG size of output: 348 [2019-11-24 04:19:49,588 WARN L192 SmtUtils]: Spent 252.00 ms on a formula simplification that was a NOOP. DAG size: 344 [2019-11-24 04:19:49,838 WARN L192 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 339 DAG size of output: 334 [2019-11-24 04:19:50,288 WARN L192 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 335 DAG size of output: 314 [2019-11-24 04:19:51,048 WARN L192 SmtUtils]: Spent 486.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 443 [2019-11-24 04:19:51,559 WARN L192 SmtUtils]: Spent 507.00 ms on a formula simplification. DAG size of input: 460 DAG size of output: 443 [2019-11-24 04:19:51,977 WARN L192 SmtUtils]: Spent 414.00 ms on a formula simplification. DAG size of input: 440 DAG size of output: 440 [2019-11-24 04:19:52,406 WARN L192 SmtUtils]: Spent 395.00 ms on a formula simplification. DAG size of input: 454 DAG size of output: 448 [2019-11-24 04:19:53,181 WARN L192 SmtUtils]: Spent 490.00 ms on a formula simplification. DAG size of input: 448 DAG size of output: 442 [2019-11-24 04:19:54,878 WARN L192 SmtUtils]: Spent 1.34 s on a formula simplification. DAG size of input: 616 DAG size of output: 608 [2019-11-24 04:19:55,518 WARN L192 SmtUtils]: Spent 635.00 ms on a formula simplification. DAG size of input: 616 DAG size of output: 608 [2019-11-24 04:19:56,062 WARN L192 SmtUtils]: Spent 539.00 ms on a formula simplification that was a NOOP. DAG size: 602 [2019-11-24 04:19:56,846 WARN L192 SmtUtils]: Spent 721.00 ms on a formula simplification. DAG size of input: 702 DAG size of output: 685 [2019-11-24 04:19:58,121 WARN L192 SmtUtils]: Spent 691.00 ms on a formula simplification. DAG size of input: 671 DAG size of output: 664 [2019-11-24 04:20:00,809 WARN L192 SmtUtils]: Spent 1.96 s on a formula simplification. DAG size of input: 1025 DAG size of output: 987 [2019-11-24 04:20:02,759 WARN L192 SmtUtils]: Spent 1.94 s on a formula simplification. DAG size of input: 1025 DAG size of output: 987 [2019-11-24 04:20:04,544 WARN L192 SmtUtils]: Spent 1.78 s on a formula simplification. DAG size of input: 979 DAG size of output: 978 [2019-11-24 04:20:06,531 WARN L192 SmtUtils]: Spent 1.90 s on a formula simplification. DAG size of input: 1049 DAG size of output: 1011 [2019-11-24 04:20:09,469 WARN L192 SmtUtils]: Spent 1.63 s on a formula simplification. DAG size of input: 1005 DAG size of output: 985 [2019-11-24 04:20:15,372 WARN L192 SmtUtils]: Spent 4.47 s on a formula simplification. DAG size of input: 1426 DAG size of output: 1390 [2019-11-24 04:20:19,615 WARN L192 SmtUtils]: Spent 4.24 s on a formula simplification. DAG size of input: 1426 DAG size of output: 1390 [2019-11-24 04:20:22,787 WARN L192 SmtUtils]: Spent 3.17 s on a formula simplification. DAG size of input: 1377 DAG size of output: 1371 [2019-11-24 04:20:26,230 WARN L192 SmtUtils]: Spent 3.32 s on a formula simplification. DAG size of input: 1566 DAG size of output: 1540 [2019-11-24 04:20:33,568 WARN L192 SmtUtils]: Spent 3.73 s on a formula simplification. DAG size of input: 1528 DAG size of output: 1513 [2019-11-24 04:20:45,973 WARN L192 SmtUtils]: Spent 9.75 s on a formula simplification. DAG size of input: 2158 DAG size of output: 2068 [2019-11-24 04:20:55,806 WARN L192 SmtUtils]: Spent 9.82 s on a formula simplification. DAG size of input: 2158 DAG size of output: 2068 [2019-11-24 04:21:04,660 WARN L192 SmtUtils]: Spent 8.84 s on a formula simplification. DAG size of input: 2035 DAG size of output: 2025 [2019-11-24 04:21:16,262 WARN L192 SmtUtils]: Spent 11.44 s on a formula simplification. DAG size of input: 2404 DAG size of output: 2357